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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, | |
1f7bba79 JB |
42 | struct sk_buff *skb, |
43 | unsigned int rtap_vendor_space) | |
b2e7771e | 44 | { |
b2e7771e JB |
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
46 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
48 | else { |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
0624760c | 52 | return NULL; |
b2e7771e JB |
53 | } |
54 | } | |
55 | ||
1f7bba79 JB |
56 | __pskb_pull(skb, rtap_vendor_space); |
57 | ||
b2e7771e JB |
58 | return skb; |
59 | } | |
60 | ||
1f7bba79 JB |
61 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, |
62 | unsigned int rtap_vendor_space) | |
b2e7771e | 63 | { |
f1d58c25 | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1f7bba79 JB |
65 | struct ieee80211_hdr *hdr; |
66 | ||
67 | hdr = (void *)(skb->data + rtap_vendor_space); | |
b2e7771e | 68 | |
4c298677 JB |
69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
70 | RX_FLAG_FAILED_PLCP_CRC | | |
71 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
6b59db7d ZG |
72 | return true; |
73 | ||
1f7bba79 | 74 | if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) |
6b59db7d ZG |
75 | return true; |
76 | ||
87228f57 HH |
77 | if (ieee80211_is_ctl(hdr->frame_control) && |
78 | !ieee80211_is_pspoll(hdr->frame_control) && | |
79 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
80 | return true; |
81 | ||
82 | return false; | |
b2e7771e JB |
83 | } |
84 | ||
601ae7f2 | 85 | static int |
1f7bba79 JB |
86 | ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, |
87 | struct ieee80211_rx_status *status, | |
88 | struct sk_buff *skb) | |
601ae7f2 BR |
89 | { |
90 | int len; | |
91 | ||
92 | /* always present fields */ | |
a144f378 | 93 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 94 | |
a144f378 | 95 | /* allocate extra bitmaps */ |
a144f378 JB |
96 | if (status->chains) |
97 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
98 | |
99 | if (ieee80211_have_rx_timestamp(status)) { | |
100 | len = ALIGN(len, 8); | |
601ae7f2 | 101 | len += 8; |
90b9e446 | 102 | } |
7fee5372 | 103 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 104 | len += 1; |
601ae7f2 | 105 | |
a144f378 JB |
106 | /* antenna field, if we don't have per-chain info */ |
107 | if (!status->chains) | |
108 | len += 1; | |
109 | ||
90b9e446 JB |
110 | /* padding for RX_FLAGS if necessary */ |
111 | len = ALIGN(len, 2); | |
601ae7f2 | 112 | |
6d744bac JB |
113 | if (status->flag & RX_FLAG_HT) /* HT info */ |
114 | len += 3; | |
115 | ||
4c298677 | 116 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 117 | len = ALIGN(len, 4); |
4c298677 JB |
118 | len += 8; |
119 | } | |
120 | ||
51648921 JB |
121 | if (status->flag & RX_FLAG_VHT) { |
122 | len = ALIGN(len, 2); | |
123 | len += 12; | |
124 | } | |
125 | ||
a144f378 JB |
126 | if (status->chains) { |
127 | /* antenna and antenna signal fields */ | |
128 | len += 2 * hweight8(status->chains); | |
129 | } | |
130 | ||
1f7bba79 JB |
131 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
132 | struct ieee80211_vendor_radiotap *rtap = (void *)skb->data; | |
133 | ||
134 | /* vendor presence bitmap */ | |
135 | len += 4; | |
136 | /* alignment for fixed 6-byte vendor data header */ | |
137 | len = ALIGN(len, 2); | |
138 | /* vendor data header */ | |
139 | len += 6; | |
140 | if (WARN_ON(rtap->align == 0)) | |
141 | rtap->align = 1; | |
142 | len = ALIGN(len, rtap->align); | |
143 | len += rtap->len + rtap->pad; | |
144 | } | |
145 | ||
601ae7f2 BR |
146 | return len; |
147 | } | |
148 | ||
00ea6deb | 149 | /* |
601ae7f2 BR |
150 | * ieee80211_add_rx_radiotap_header - add radiotap header |
151 | * | |
152 | * add a radiotap header containing all the fields which the hardware provided. | |
153 | */ | |
154 | static void | |
155 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
156 | struct sk_buff *skb, | |
601ae7f2 | 157 | struct ieee80211_rate *rate, |
973ef21a | 158 | int rtap_len, bool has_fcs) |
601ae7f2 | 159 | { |
f1d58c25 | 160 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
161 | struct ieee80211_radiotap_header *rthdr; |
162 | unsigned char *pos; | |
a144f378 JB |
163 | __le32 *it_present; |
164 | u32 it_present_val; | |
6a86b9c7 | 165 | u16 rx_flags = 0; |
a5e70697 | 166 | u16 channel_flags = 0; |
a144f378 JB |
167 | int mpdulen, chain; |
168 | unsigned long chains = status->chains; | |
1f7bba79 JB |
169 | struct ieee80211_vendor_radiotap rtap = {}; |
170 | ||
171 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
172 | rtap = *(struct ieee80211_vendor_radiotap *)skb->data; | |
173 | /* rtap.len and rtap.pad are undone immediately */ | |
174 | skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad); | |
175 | } | |
f4bda337 TP |
176 | |
177 | mpdulen = skb->len; | |
178 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
179 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
180 | |
181 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
1f7bba79 | 182 | memset(rthdr, 0, rtap_len - rtap.len - rtap.pad); |
a144f378 | 183 | it_present = &rthdr->it_present; |
601ae7f2 BR |
184 | |
185 | /* radiotap header, set always present flags */ | |
0059b2b1 | 186 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
187 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
188 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
189 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
190 | ||
191 | if (!status->chains) | |
192 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
193 | ||
194 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
195 | it_present_val |= | |
196 | BIT(IEEE80211_RADIOTAP_EXT) | | |
197 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
198 | put_unaligned_le32(it_present_val, it_present); | |
199 | it_present++; | |
200 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
201 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
202 | } | |
601ae7f2 | 203 | |
1f7bba79 JB |
204 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
205 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | | |
206 | BIT(IEEE80211_RADIOTAP_EXT); | |
207 | put_unaligned_le32(it_present_val, it_present); | |
208 | it_present++; | |
209 | it_present_val = rtap.present; | |
210 | } | |
211 | ||
a144f378 JB |
212 | put_unaligned_le32(it_present_val, it_present); |
213 | ||
214 | pos = (void *)(it_present + 1); | |
215 | ||
601ae7f2 BR |
216 | /* the order of the following fields is important */ |
217 | ||
218 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 219 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
220 | /* padding */ |
221 | while ((pos - (u8 *)rthdr) & 7) | |
222 | *pos++ = 0; | |
f4bda337 TP |
223 | put_unaligned_le64( |
224 | ieee80211_calculate_rx_timestamp(local, status, | |
225 | mpdulen, 0), | |
226 | pos); | |
1df332e8 | 227 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
228 | pos += 8; |
229 | } | |
230 | ||
231 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 232 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 233 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
234 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
235 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
236 | if (status->flag & RX_FLAG_SHORTPRE) |
237 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
238 | pos++; |
239 | ||
240 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 241 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 242 | /* |
f8d1ccf1 | 243 | * Without rate information don't add it. If we have, |
38f37be2 | 244 | * MCS information is a separate field in radiotap, |
73b48099 JB |
245 | * added below. The byte here is needed as padding |
246 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
247 | */ |
248 | *pos = 0; | |
8d6f658e | 249 | } else { |
2103dec1 | 250 | int shift = 0; |
ebe6c7ba | 251 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
252 | if (status->flag & RX_FLAG_10MHZ) |
253 | shift = 1; | |
254 | else if (status->flag & RX_FLAG_5MHZ) | |
255 | shift = 2; | |
256 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 257 | } |
601ae7f2 BR |
258 | pos++; |
259 | ||
260 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 261 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 262 | pos += 2; |
a5e70697 SW |
263 | if (status->flag & RX_FLAG_10MHZ) |
264 | channel_flags |= IEEE80211_CHAN_HALF; | |
265 | else if (status->flag & RX_FLAG_5MHZ) | |
266 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
267 | ||
601ae7f2 | 268 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 269 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 270 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 271 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 272 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 273 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 274 | else if (rate) |
a5e70697 | 275 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 276 | else |
a5e70697 SW |
277 | channel_flags |= IEEE80211_CHAN_2GHZ; |
278 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
279 | pos += 2; |
280 | ||
281 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
282 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
283 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
284 | *pos = status->signal; |
285 | rthdr->it_present |= | |
286 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
287 | pos++; | |
288 | } | |
289 | ||
601ae7f2 BR |
290 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
291 | ||
a144f378 JB |
292 | if (!status->chains) { |
293 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
294 | *pos = status->antenna; | |
295 | pos++; | |
296 | } | |
601ae7f2 | 297 | |
601ae7f2 BR |
298 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
299 | ||
300 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
301 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 302 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 303 | *pos++ = 0; |
aae89831 | 304 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
305 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
306 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 307 | pos += 2; |
6d744bac JB |
308 | |
309 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
310 | unsigned int stbc; |
311 | ||
6d744bac | 312 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 313 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
314 | *pos = 0; |
315 | if (status->flag & RX_FLAG_SHORT_GI) | |
316 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
317 | if (status->flag & RX_FLAG_40MHZ) | |
318 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
319 | if (status->flag & RX_FLAG_HT_GF) |
320 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
321 | if (status->flag & RX_FLAG_LDPC) |
322 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
323 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
324 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
325 | pos++; |
326 | *pos++ = status->rate_idx; | |
327 | } | |
4c298677 JB |
328 | |
329 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
330 | u16 flags = 0; | |
331 | ||
332 | /* ensure 4 byte alignment */ | |
333 | while ((pos - (u8 *)rthdr) & 3) | |
334 | pos++; | |
335 | rthdr->it_present |= | |
336 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
337 | put_unaligned_le32(status->ampdu_reference, pos); | |
338 | pos += 4; | |
339 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
340 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
341 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
342 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
343 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
344 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
345 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
346 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
347 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
348 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
349 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
350 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
351 | put_unaligned_le16(flags, pos); | |
352 | pos += 2; | |
353 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
354 | *pos++ = status->ampdu_delimiter_crc; | |
355 | else | |
356 | *pos++ = 0; | |
357 | *pos++ = 0; | |
358 | } | |
90b9e446 | 359 | |
51648921 JB |
360 | if (status->flag & RX_FLAG_VHT) { |
361 | u16 known = local->hw.radiotap_vht_details; | |
362 | ||
363 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
364 | /* known field - how to handle 80+80? */ | |
1b8d242a | 365 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 JB |
366 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
367 | put_unaligned_le16(known, pos); | |
368 | pos += 2; | |
369 | /* flags */ | |
370 | if (status->flag & RX_FLAG_SHORT_GI) | |
371 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
372 | /* in VHT, STBC is binary */ |
373 | if (status->flag & RX_FLAG_STBC_MASK) | |
374 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
375 | if (status->vht_flag & RX_VHT_FLAG_BF) |
376 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
377 | pos++; |
378 | /* bandwidth */ | |
1b8d242a | 379 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 380 | *pos++ = 4; |
1b8d242a | 381 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 | 382 | *pos++ = 0; /* marked not known above */ |
1b8d242a | 383 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
384 | *pos++ = 11; |
385 | else if (status->flag & RX_FLAG_40MHZ) | |
386 | *pos++ = 1; | |
387 | else /* 20 MHz */ | |
388 | *pos++ = 0; | |
389 | /* MCS/NSS */ | |
390 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
391 | pos += 4; | |
392 | /* coding field */ | |
63c361f5 EG |
393 | if (status->flag & RX_FLAG_LDPC) |
394 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
395 | pos++; |
396 | /* group ID */ | |
397 | pos++; | |
398 | /* partial_aid */ | |
399 | pos += 2; | |
400 | } | |
401 | ||
a144f378 JB |
402 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
403 | *pos++ = status->chain_signal[chain]; | |
404 | *pos++ = chain; | |
405 | } | |
1f7bba79 JB |
406 | |
407 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
408 | /* ensure 2 byte alignment for the vendor field as required */ | |
409 | if ((pos - (u8 *)rthdr) & 1) | |
410 | *pos++ = 0; | |
411 | *pos++ = rtap.oui[0]; | |
412 | *pos++ = rtap.oui[1]; | |
413 | *pos++ = rtap.oui[2]; | |
414 | *pos++ = rtap.subns; | |
415 | put_unaligned_le16(rtap.len, pos); | |
416 | pos += 2; | |
417 | /* align the actual payload as requested */ | |
418 | while ((pos - (u8 *)rthdr) & (rtap.align - 1)) | |
419 | *pos++ = 0; | |
420 | /* data (and possible padding) already follows */ | |
421 | } | |
601ae7f2 BR |
422 | } |
423 | ||
b2e7771e JB |
424 | /* |
425 | * This function copies a received frame to all monitor interfaces and | |
426 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
427 | * radiotap header the driver might have added. | |
428 | */ | |
429 | static struct sk_buff * | |
430 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 431 | struct ieee80211_rate *rate) |
b2e7771e | 432 | { |
f1d58c25 | 433 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 434 | struct ieee80211_sub_if_data *sdata; |
1f7bba79 | 435 | int rt_hdrlen, needed_headroom; |
b2e7771e JB |
436 | struct sk_buff *skb, *skb2; |
437 | struct net_device *prev_dev = NULL; | |
438 | int present_fcs_len = 0; | |
1f7bba79 JB |
439 | unsigned int rtap_vendor_space = 0; |
440 | ||
441 | if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) { | |
442 | struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data; | |
443 | ||
444 | rtap_vendor_space = sizeof(*rtap) + rtap->len + rtap->pad; | |
445 | } | |
b2e7771e JB |
446 | |
447 | /* | |
448 | * First, we may need to make a copy of the skb because | |
449 | * (1) we need to modify it for radiotap (if not present), and | |
450 | * (2) the other RX handlers will modify the skb we got. | |
451 | * | |
452 | * We don't need to, of course, if we aren't going to return | |
453 | * the SKB because it has a bad FCS/PLCP checksum. | |
454 | */ | |
0869aea0 | 455 | |
b2e7771e JB |
456 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
457 | present_fcs_len = FCS_LEN; | |
458 | ||
1f7bba79 JB |
459 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
460 | if (!pskb_may_pull(origskb, 2 + rtap_vendor_space)) { | |
e3cf8b3f ZY |
461 | dev_kfree_skb(origskb); |
462 | return NULL; | |
463 | } | |
464 | ||
b2e7771e | 465 | if (!local->monitors) { |
1f7bba79 JB |
466 | if (should_drop_frame(origskb, present_fcs_len, |
467 | rtap_vendor_space)) { | |
b2e7771e JB |
468 | dev_kfree_skb(origskb); |
469 | return NULL; | |
470 | } | |
471 | ||
1f7bba79 | 472 | return remove_monitor_info(local, origskb, rtap_vendor_space); |
b2e7771e JB |
473 | } |
474 | ||
751413ea | 475 | /* room for the radiotap header based on driver features */ |
1f7bba79 JB |
476 | rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, origskb); |
477 | needed_headroom = rt_hdrlen - rtap_vendor_space; | |
751413ea | 478 | |
1f7bba79 | 479 | if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { |
b2e7771e JB |
480 | /* only need to expand headroom if necessary */ |
481 | skb = origskb; | |
482 | origskb = NULL; | |
483 | ||
484 | /* | |
485 | * This shouldn't trigger often because most devices have an | |
486 | * RX header they pull before we get here, and that should | |
487 | * be big enough for our radiotap information. We should | |
488 | * probably export the length to drivers so that we can have | |
489 | * them allocate enough headroom to start with. | |
490 | */ | |
491 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 492 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
493 | dev_kfree_skb(skb); |
494 | return NULL; | |
495 | } | |
496 | } else { | |
497 | /* | |
498 | * Need to make a copy and possibly remove radiotap header | |
499 | * and FCS from the original. | |
500 | */ | |
501 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
502 | ||
1f7bba79 JB |
503 | origskb = remove_monitor_info(local, origskb, |
504 | rtap_vendor_space); | |
b2e7771e JB |
505 | |
506 | if (!skb) | |
507 | return origskb; | |
508 | } | |
509 | ||
0869aea0 | 510 | /* prepend radiotap information */ |
1f7bba79 | 511 | ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true); |
b2e7771e | 512 | |
ce3edf6d | 513 | skb_reset_mac_header(skb); |
b2e7771e JB |
514 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
515 | skb->pkt_type = PACKET_OTHERHOST; | |
516 | skb->protocol = htons(ETH_P_802_2); | |
517 | ||
518 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 519 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
520 | continue; |
521 | ||
3d30d949 MW |
522 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
523 | continue; | |
524 | ||
9607e6b6 | 525 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
526 | continue; |
527 | ||
b2e7771e JB |
528 | if (prev_dev) { |
529 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
530 | if (skb2) { | |
531 | skb2->dev = prev_dev; | |
5548a8a1 | 532 | netif_receive_skb(skb2); |
b2e7771e JB |
533 | } |
534 | } | |
535 | ||
536 | prev_dev = sdata->dev; | |
537 | sdata->dev->stats.rx_packets++; | |
538 | sdata->dev->stats.rx_bytes += skb->len; | |
539 | } | |
540 | ||
541 | if (prev_dev) { | |
542 | skb->dev = prev_dev; | |
5548a8a1 | 543 | netif_receive_skb(skb); |
b2e7771e JB |
544 | } else |
545 | dev_kfree_skb(skb); | |
546 | ||
547 | return origskb; | |
548 | } | |
549 | ||
5cf121c3 | 550 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 551 | { |
238f74a2 | 552 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 553 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 554 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
555 | |
556 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
557 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
558 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 559 | /* frame has qos control */ |
238f74a2 | 560 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 561 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 562 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
563 | |
564 | seqno_idx = tid; | |
565 | security_idx = tid; | |
6e0d114d | 566 | } else { |
1411f9b5 JB |
567 | /* |
568 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
569 | * | |
570 | * Sequence numbers for management frames, QoS data | |
571 | * frames with a broadcast/multicast address in the | |
572 | * Address 1 field, and all non-QoS data frames sent | |
573 | * by QoS STAs are assigned using an additional single | |
574 | * modulo-4096 counter, [...] | |
575 | * | |
576 | * We also use that counter for non-QoS STAs. | |
577 | */ | |
5a306f58 | 578 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
579 | security_idx = 0; |
580 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 581 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 582 | tid = 0; |
6e0d114d | 583 | } |
52865dfd | 584 | |
9e26297a JB |
585 | rx->seqno_idx = seqno_idx; |
586 | rx->security_idx = security_idx; | |
6e0d114d JB |
587 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
588 | * For now, set skb->priority to 0 for other cases. */ | |
589 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 590 | } |
6e0d114d | 591 | |
d1c3a37c JB |
592 | /** |
593 | * DOC: Packet alignment | |
594 | * | |
595 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
596 | * to the stack. | |
597 | * | |
598 | * Additionally, should, if possible, align the payload data in a way that | |
599 | * guarantees that the contained IP header is aligned to a four-byte | |
600 | * boundary. In the case of regular frames, this simply means aligning the | |
601 | * payload to a four-byte boundary (because either the IP header is directly | |
602 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
603 | * in front of it). If the payload data is not properly aligned and the |
604 | * architecture doesn't support efficient unaligned operations, mac80211 | |
605 | * will align the data. | |
d1c3a37c JB |
606 | * |
607 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
608 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
609 | * push the IP header further back to a multiple of four again. Thankfully, the | |
610 | * specs were sane enough this time around to require padding each A-MSDU | |
611 | * subframe to a length that is a multiple of four. | |
612 | * | |
25985edc | 613 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
614 | * the payload is not supported, the driver is required to move the 802.11 |
615 | * header to be directly in front of the payload in that case. | |
616 | */ | |
617 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 618 | { |
59d9cb07 KV |
619 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
620 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
621 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 622 | #endif |
6e0d114d JB |
623 | } |
624 | ||
6368e4b1 | 625 | |
571ecf67 JB |
626 | /* rx handlers */ |
627 | ||
3cfcf6ac JM |
628 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
629 | { | |
630 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
631 | ||
d8ca16db | 632 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
633 | return 0; |
634 | ||
d8ca16db | 635 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
636 | } |
637 | ||
638 | ||
639 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
640 | { | |
641 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
642 | ||
d8ca16db | 643 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
644 | return 0; |
645 | ||
d8ca16db | 646 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
647 | } |
648 | ||
649 | ||
650 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
651 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
652 | { | |
653 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
654 | struct ieee80211_mmie *mmie; | |
655 | ||
1df332e8 | 656 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
657 | return -1; |
658 | ||
d8ca16db | 659 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
660 | return -1; /* not a robust management frame */ |
661 | ||
662 | mmie = (struct ieee80211_mmie *) | |
663 | (skb->data + skb->len - sizeof(*mmie)); | |
664 | if (mmie->element_id != WLAN_EID_MMIE || | |
665 | mmie->length != sizeof(*mmie) - 2) | |
666 | return -1; | |
667 | ||
668 | return le16_to_cpu(mmie->key_id); | |
669 | } | |
670 | ||
2475b1cc MS |
671 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
672 | struct sk_buff *skb) | |
673 | { | |
674 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
675 | __le16 fc; | |
676 | int hdrlen; | |
677 | u8 keyid; | |
678 | ||
679 | fc = hdr->frame_control; | |
680 | hdrlen = ieee80211_hdrlen(fc); | |
681 | ||
682 | if (skb->len < hdrlen + cs->hdr_len) | |
683 | return -EINVAL; | |
684 | ||
685 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
686 | keyid &= cs->key_idx_mask; | |
687 | keyid >>= cs->key_idx_shift; | |
688 | ||
689 | return keyid; | |
690 | } | |
691 | ||
1df332e8 | 692 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 693 | { |
a7767f95 | 694 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 695 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 696 | |
a7767f95 | 697 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
698 | if (is_multicast_ether_addr(hdr->addr1)) { |
699 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 700 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 701 | return RX_DROP_MONITOR; |
b203ca39 | 702 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
703 | return RX_DROP_MONITOR; |
704 | } else { | |
705 | if (!ieee80211_has_a4(hdr->frame_control)) | |
706 | return RX_DROP_MONITOR; | |
b203ca39 | 707 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
708 | return RX_DROP_MONITOR; |
709 | } | |
33b64eb2 LCC |
710 | } |
711 | ||
712 | /* If there is not an established peer link and this is not a peer link | |
713 | * establisment frame, beacon or probe, drop the frame. | |
714 | */ | |
715 | ||
57cf8043 | 716 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 717 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 718 | |
a7767f95 | 719 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
720 | return RX_DROP_MONITOR; |
721 | ||
a7767f95 | 722 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 723 | u8 category; |
9b395bc3 JB |
724 | |
725 | /* make sure category field is present */ | |
726 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
727 | return RX_DROP_MONITOR; | |
728 | ||
33b64eb2 | 729 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
730 | category = mgmt->u.action.category; |
731 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 732 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 733 | return RX_DROP_MONITOR; |
33b64eb2 | 734 | return RX_CONTINUE; |
33b64eb2 LCC |
735 | } |
736 | ||
a7767f95 HH |
737 | if (ieee80211_is_probe_req(hdr->frame_control) || |
738 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
739 | ieee80211_is_beacon(hdr->frame_control) || |
740 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
741 | return RX_CONTINUE; |
742 | ||
743 | return RX_DROP_MONITOR; | |
a7767f95 HH |
744 | } |
745 | ||
902acc78 JB |
746 | return RX_CONTINUE; |
747 | } | |
33b64eb2 | 748 | |
d3b2fb53 | 749 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 750 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
751 | int index, |
752 | struct sk_buff_head *frames) | |
1edfb1af | 753 | { |
83eb935e MK |
754 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
755 | struct sk_buff *skb; | |
4cfda47b | 756 | struct ieee80211_rx_status *status; |
1edfb1af | 757 | |
dd318575 JB |
758 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
759 | ||
83eb935e | 760 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
761 | goto no_frame; |
762 | ||
83eb935e MK |
763 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
764 | __skb_queue_purge(skb_list); | |
765 | goto no_frame; | |
766 | } | |
767 | ||
768 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 769 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
770 | while ((skb = __skb_dequeue(skb_list))) { |
771 | status = IEEE80211_SKB_RXCB(skb); | |
772 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
773 | __skb_queue_tail(frames, skb); | |
774 | } | |
1edfb1af JB |
775 | |
776 | no_frame: | |
9a886586 | 777 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
778 | } |
779 | ||
d3b2fb53 | 780 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 781 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
782 | u16 head_seq_num, |
783 | struct sk_buff_head *frames) | |
1edfb1af JB |
784 | { |
785 | int index; | |
786 | ||
dd318575 JB |
787 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
788 | ||
9a886586 | 789 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 790 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
791 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
792 | frames); | |
1edfb1af JB |
793 | } |
794 | } | |
795 | ||
796 | /* | |
797 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
798 | * the skb was added to the buffer longer than this time ago, the earlier | |
799 | * frames that have not yet been received are assumed to be lost and the skb | |
800 | * can be released for processing. This may also release other skb's from the | |
801 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
802 | * |
803 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
804 | */ |
805 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
806 | ||
d3b2fb53 | 807 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
808 | struct tid_ampdu_rx *tid_agg_rx, |
809 | struct sk_buff_head *frames) | |
aa0c8636 | 810 | { |
83eb935e | 811 | int index, i, j; |
aa0c8636 | 812 | |
dd318575 JB |
813 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
814 | ||
aa0c8636 | 815 | /* release the buffer until next missing frame */ |
2e3049b7 | 816 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 817 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 818 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
819 | /* |
820 | * No buffers ready to be released, but check whether any | |
821 | * frames in the reorder buffer have timed out. | |
822 | */ | |
aa0c8636 CL |
823 | int skipped = 1; |
824 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
825 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
826 | if (!ieee80211_rx_reorder_ready( |
827 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
828 | skipped++; |
829 | continue; | |
830 | } | |
499fe9a4 DH |
831 | if (skipped && |
832 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 833 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 834 | goto set_release_timer; |
aa0c8636 | 835 | |
83eb935e MK |
836 | /* don't leave incomplete A-MSDUs around */ |
837 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
838 | i = (i + 1) % tid_agg_rx->buf_size) | |
839 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
840 | ||
bdcbd8e0 JB |
841 | ht_dbg_ratelimited(sdata, |
842 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
843 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
844 | frames); | |
aa0c8636 CL |
845 | |
846 | /* | |
847 | * Increment the head seq# also for the skipped slots. | |
848 | */ | |
849 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
850 | (tid_agg_rx->head_seq_num + |
851 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
852 | skipped = 0; |
853 | } | |
83eb935e MK |
854 | } else while (ieee80211_rx_reorder_ready( |
855 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
856 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
857 | frames); | |
2e3049b7 | 858 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 859 | } |
2bff8ebf CL |
860 | |
861 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 862 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
863 | |
864 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
865 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
866 | if (ieee80211_rx_reorder_ready( |
867 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
868 | break; |
869 | } | |
870 | ||
871 | set_release_timer: | |
872 | ||
873 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 874 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
875 | HT_RX_REORDER_BUF_TIMEOUT); |
876 | } else { | |
877 | del_timer(&tid_agg_rx->reorder_timer); | |
878 | } | |
aa0c8636 CL |
879 | } |
880 | ||
1edfb1af JB |
881 | /* |
882 | * As this function belongs to the RX path it must be under | |
883 | * rcu_read_lock protection. It returns false if the frame | |
884 | * can be processed immediately, true if it was consumed. | |
885 | */ | |
d3b2fb53 | 886 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 887 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
888 | struct sk_buff *skb, |
889 | struct sk_buff_head *frames) | |
1edfb1af JB |
890 | { |
891 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 892 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
893 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
894 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
895 | u16 head_seq_num, buf_size; | |
896 | int index; | |
2bff8ebf | 897 | bool ret = true; |
1edfb1af | 898 | |
dd318575 JB |
899 | spin_lock(&tid_agg_rx->reorder_lock); |
900 | ||
4549cf2b MK |
901 | /* |
902 | * Offloaded BA sessions have no known starting sequence number so pick | |
903 | * one from first Rxed frame for this tid after BA was started. | |
904 | */ | |
905 | if (unlikely(tid_agg_rx->auto_seq)) { | |
906 | tid_agg_rx->auto_seq = false; | |
907 | tid_agg_rx->ssn = mpdu_seq_num; | |
908 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
909 | } | |
910 | ||
1edfb1af JB |
911 | buf_size = tid_agg_rx->buf_size; |
912 | head_seq_num = tid_agg_rx->head_seq_num; | |
913 | ||
914 | /* frame with out of date sequence number */ | |
9a886586 | 915 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 916 | dev_kfree_skb(skb); |
2bff8ebf | 917 | goto out; |
1edfb1af JB |
918 | } |
919 | ||
920 | /* | |
921 | * If frame the sequence number exceeds our buffering window | |
922 | * size release some previous frames to make room for this one. | |
923 | */ | |
9a886586 JB |
924 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
925 | head_seq_num = ieee80211_sn_inc( | |
926 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 927 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 928 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 929 | head_seq_num, frames); |
1edfb1af JB |
930 | } |
931 | ||
932 | /* Now the new frame is always in the range of the reordering buffer */ | |
933 | ||
2e3049b7 | 934 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
935 | |
936 | /* check if we already stored this frame */ | |
83eb935e | 937 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 938 | dev_kfree_skb(skb); |
2bff8ebf | 939 | goto out; |
1edfb1af JB |
940 | } |
941 | ||
942 | /* | |
943 | * If the current MPDU is in the right order and nothing else | |
944 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
945 | * If it is first but there's something stored, we may be able |
946 | * to release frames after this one. | |
1edfb1af JB |
947 | */ |
948 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
949 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
950 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
951 | tid_agg_rx->head_seq_num = | |
952 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
953 | ret = false; |
954 | goto out; | |
1edfb1af JB |
955 | } |
956 | ||
957 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
958 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
959 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
960 | tid_agg_rx->reorder_time[index] = jiffies; | |
961 | tid_agg_rx->stored_mpdu_num++; | |
962 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
963 | } | |
1edfb1af | 964 | |
2bff8ebf CL |
965 | out: |
966 | spin_unlock(&tid_agg_rx->reorder_lock); | |
967 | return ret; | |
1edfb1af JB |
968 | } |
969 | ||
970 | /* | |
971 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
972 | * true if the MPDU was buffered, false if it should be processed. | |
973 | */ | |
f9e124fb CL |
974 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
975 | struct sk_buff_head *frames) | |
1edfb1af | 976 | { |
2569a826 JB |
977 | struct sk_buff *skb = rx->skb; |
978 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 979 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 980 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 981 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
982 | struct tid_ampdu_rx *tid_agg_rx; |
983 | u16 sc; | |
6cc00d54 | 984 | u8 tid, ack_policy; |
1edfb1af | 985 | |
051a41fa JB |
986 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
987 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 988 | goto dont_reorder; |
1edfb1af JB |
989 | |
990 | /* | |
991 | * filter the QoS data rx stream according to | |
992 | * STA/TID and check if this STA/TID is on aggregation | |
993 | */ | |
994 | ||
1edfb1af | 995 | if (!sta) |
2569a826 | 996 | goto dont_reorder; |
1edfb1af | 997 | |
6cc00d54 TP |
998 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
999 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
1000 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
1001 | ||
a87f736d JB |
1002 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
1003 | if (!tid_agg_rx) | |
1004 | goto dont_reorder; | |
1edfb1af JB |
1005 | |
1006 | /* qos null data frames are excluded */ | |
1007 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1008 | goto dont_reorder; |
1edfb1af | 1009 | |
6cc00d54 TP |
1010 | /* not part of a BA session */ |
1011 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1012 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1013 | goto dont_reorder; | |
1014 | ||
660c6a44 TP |
1015 | /* not actually part of this BA session */ |
1016 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1017 | goto dont_reorder; | |
1018 | ||
1edfb1af JB |
1019 | /* new, potentially un-ordered, ampdu frame - process it */ |
1020 | ||
1021 | /* reset session timer */ | |
1022 | if (tid_agg_rx->timeout) | |
12d3952f | 1023 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1024 | |
1025 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1026 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1027 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1028 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1029 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1030 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1031 | return; |
1edfb1af JB |
1032 | } |
1033 | ||
a87f736d JB |
1034 | /* |
1035 | * No locking needed -- we will only ever process one | |
1036 | * RX packet at a time, and thus own tid_agg_rx. All | |
1037 | * other code manipulating it needs to (and does) make | |
1038 | * sure that we cannot get to it any more before doing | |
1039 | * anything with it. | |
1040 | */ | |
f9e124fb CL |
1041 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1042 | frames)) | |
2569a826 JB |
1043 | return; |
1044 | ||
1045 | dont_reorder: | |
f9e124fb | 1046 | __skb_queue_tail(frames, skb); |
1edfb1af | 1047 | } |
33b64eb2 | 1048 | |
49461622 | 1049 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1050 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 1051 | { |
a7767f95 | 1052 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1053 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1054 | |
6b0f3274 JB |
1055 | /* |
1056 | * Drop duplicate 802.11 retransmissions | |
1057 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1058 | */ | |
1059 | if (rx->skb->len >= 24 && rx->sta && | |
1060 | !ieee80211_is_ctl(hdr->frame_control) && | |
1061 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && | |
1062 | !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 1063 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1064 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1065 | hdr->seq_ctrl)) { |
554891e6 | 1066 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
1067 | rx->local->dot11FrameDuplicateCount++; |
1068 | rx->sta->num_duplicates++; | |
1069 | } | |
b1f93314 | 1070 | return RX_DROP_UNUSABLE; |
0cfcefef | 1071 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1072 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1073 | } |
571ecf67 JB |
1074 | } |
1075 | ||
571ecf67 JB |
1076 | if (unlikely(rx->skb->len < 16)) { |
1077 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 1078 | return RX_DROP_MONITOR; |
571ecf67 JB |
1079 | } |
1080 | ||
571ecf67 JB |
1081 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1082 | * IEEE 802.11, Chap 5.5. | |
1083 | * | |
ccd7b362 JB |
1084 | * mac80211 filters only based on association state, i.e. it drops |
1085 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1086 | * deauth/disassoc frames when needed. In addition, hostapd is |
1087 | * responsible for filtering on both auth and assoc states. | |
1088 | */ | |
33b64eb2 | 1089 | |
902acc78 | 1090 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1091 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1092 | |
a7767f95 HH |
1093 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1094 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1095 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1096 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1097 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1098 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1099 | /* |
1100 | * accept port control frames from the AP even when it's not | |
1101 | * yet marked ASSOC to prevent a race where we don't set the | |
1102 | * assoc bit quickly enough before it sends the first frame | |
1103 | */ | |
1104 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1105 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1106 | unsigned int hdrlen; |
1107 | __be16 ethertype; | |
1108 | ||
1109 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1110 | ||
1111 | if (rx->skb->len < hdrlen + 8) | |
1112 | return RX_DROP_MONITOR; | |
1113 | ||
1114 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1115 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1116 | return RX_CONTINUE; |
1117 | } | |
21fc7560 JB |
1118 | |
1119 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1120 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1121 | hdr->addr2, | |
1122 | GFP_ATOMIC)) | |
1123 | return RX_DROP_UNUSABLE; | |
1124 | ||
e4c26add | 1125 | return RX_DROP_MONITOR; |
2a33bee2 | 1126 | } |
571ecf67 | 1127 | |
9ae54c84 | 1128 | return RX_CONTINUE; |
570bd537 JB |
1129 | } |
1130 | ||
1131 | ||
572e0012 KV |
1132 | static ieee80211_rx_result debug_noinline |
1133 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1134 | { | |
1135 | struct ieee80211_local *local; | |
1136 | struct ieee80211_hdr *hdr; | |
1137 | struct sk_buff *skb; | |
1138 | ||
1139 | local = rx->local; | |
1140 | skb = rx->skb; | |
1141 | hdr = (struct ieee80211_hdr *) skb->data; | |
1142 | ||
1143 | if (!local->pspolling) | |
1144 | return RX_CONTINUE; | |
1145 | ||
1146 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1147 | /* this is not from AP */ | |
1148 | return RX_CONTINUE; | |
1149 | ||
1150 | if (!ieee80211_is_data(hdr->frame_control)) | |
1151 | return RX_CONTINUE; | |
1152 | ||
1153 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1154 | /* AP has no more frames buffered for us */ | |
1155 | local->pspolling = false; | |
1156 | return RX_CONTINUE; | |
1157 | } | |
1158 | ||
1159 | /* more data bit is set, let's request a new frame from the AP */ | |
1160 | ieee80211_send_pspoll(local, rx->sdata); | |
1161 | ||
1162 | return RX_CONTINUE; | |
1163 | } | |
1164 | ||
d012a605 | 1165 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1166 | { |
133b8226 | 1167 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1168 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1169 | struct ps_data *ps; |
0795af57 | 1170 | |
d012a605 MP |
1171 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1172 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1173 | ps = &sdata->bss->ps; | |
1174 | else | |
1175 | return; | |
1176 | ||
1177 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1178 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1179 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1180 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1181 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1182 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1183 | } |
1184 | ||
d012a605 | 1185 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1186 | { |
bdcbd8e0 JB |
1187 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1188 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1189 | |
c2c98fde | 1190 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1191 | /* |
1192 | * Clear the flag only if the other one is still set | |
1193 | * so that the TX path won't start TX'ing new frames | |
1194 | * directly ... In the case that the driver flag isn't | |
1195 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1196 | */ | |
1197 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1198 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1199 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1200 | return; |
1201 | } | |
1202 | ||
5ac2e350 JB |
1203 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1204 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1205 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1206 | } |
1207 | ||
d057e5a3 AN |
1208 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1209 | { | |
1210 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1211 | bool in_ps; | |
1212 | ||
1213 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1214 | ||
1215 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1216 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1217 | if ((start && in_ps) || (!start && !in_ps)) |
1218 | return -EINVAL; | |
1219 | ||
1220 | if (start) | |
d012a605 | 1221 | sta_ps_start(sta_inf); |
d057e5a3 | 1222 | else |
d012a605 | 1223 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1224 | |
1225 | return 0; | |
1226 | } | |
1227 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1228 | ||
47086fc5 JB |
1229 | static ieee80211_rx_result debug_noinline |
1230 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1231 | { | |
1232 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1233 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1234 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1235 | int tid, ac; | |
1236 | ||
1237 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1238 | return RX_CONTINUE; | |
1239 | ||
1240 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1241 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1242 | return RX_CONTINUE; | |
1243 | ||
1244 | /* | |
1245 | * The device handles station powersave, so don't do anything about | |
1246 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1247 | * it to mac80211 since they're handled.) | |
1248 | */ | |
1249 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1250 | return RX_CONTINUE; | |
1251 | ||
1252 | /* | |
1253 | * Don't do anything if the station isn't already asleep. In | |
1254 | * the uAPSD case, the station will probably be marked asleep, | |
1255 | * in the PS-Poll case the station must be confused ... | |
1256 | */ | |
c2c98fde | 1257 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1258 | return RX_CONTINUE; |
1259 | ||
1260 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1261 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1262 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1263 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1264 | else | |
c2c98fde | 1265 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1266 | } |
47086fc5 JB |
1267 | |
1268 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1269 | * count as an dropped frame. */ | |
1270 | dev_kfree_skb(rx->skb); | |
1271 | ||
1272 | return RX_QUEUED; | |
1273 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1274 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1275 | ieee80211_has_pm(hdr->frame_control) && | |
1276 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1277 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1278 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1279 | ac = ieee802_1d_to_ac[tid & 7]; | |
1280 | ||
1281 | /* | |
1282 | * If this AC is not trigger-enabled do nothing. | |
1283 | * | |
1284 | * NB: This could/should check a separate bitmap of trigger- | |
1285 | * enabled queues, but for now we only implement uAPSD w/o | |
1286 | * TSPEC changes to the ACs, so they're always the same. | |
1287 | */ | |
1288 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1289 | return RX_CONTINUE; | |
1290 | ||
1291 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1292 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1293 | return RX_CONTINUE; |
1294 | ||
c2c98fde | 1295 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1296 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1297 | else | |
c2c98fde | 1298 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1299 | } |
1300 | ||
1301 | return RX_CONTINUE; | |
1302 | } | |
1303 | ||
49461622 | 1304 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1305 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1306 | { |
1307 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1308 | struct sk_buff *skb = rx->skb; |
1309 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1310 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1311 | int i; |
571ecf67 JB |
1312 | |
1313 | if (!sta) | |
9ae54c84 | 1314 | return RX_CONTINUE; |
571ecf67 | 1315 | |
b291ba11 JB |
1316 | /* |
1317 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1318 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1319 | * current IBSS network alive in cases where other STAs start | |
1320 | * using different BSSID. This will also give the station another | |
1321 | * chance to restart the authentication/authorization in case | |
1322 | * something went wrong the first time. | |
b291ba11 | 1323 | */ |
05c914fe | 1324 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1325 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1326 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1327 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1328 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1329 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1330 | if (ieee80211_is_data(hdr->frame_control) && |
1331 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1332 | sta->last_rx_rate_idx = status->rate_idx; |
1333 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1334 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1335 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1336 | } |
1337 | } | |
239281f8 RL |
1338 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
1339 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, | |
1340 | NL80211_IFTYPE_OCB); | |
1341 | /* OCB uses wild-card BSSID */ | |
1342 | if (is_broadcast_ether_addr(bssid)) | |
1343 | sta->last_rx = jiffies; | |
b291ba11 JB |
1344 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1345 | /* | |
33b64eb2 LCC |
1346 | * Mesh beacons will update last_rx when if they are found to |
1347 | * match the current local configuration when processed. | |
571ecf67 | 1348 | */ |
b291ba11 | 1349 | sta->last_rx = jiffies; |
3af6334c FF |
1350 | if (ieee80211_is_data(hdr->frame_control)) { |
1351 | sta->last_rx_rate_idx = status->rate_idx; | |
1352 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1353 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1354 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1355 | } |
571ecf67 JB |
1356 | } |
1357 | ||
554891e6 | 1358 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1359 | return RX_CONTINUE; |
571ecf67 | 1360 | |
3cf335d5 KV |
1361 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1362 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1363 | ||
571ecf67 JB |
1364 | sta->rx_fragments++; |
1365 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1366 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1367 | sta->last_signal = status->signal; | |
1368 | ewma_add(&sta->avg_signal, -status->signal); | |
1369 | } | |
571ecf67 | 1370 | |
ef0621e8 FF |
1371 | if (status->chains) { |
1372 | sta->chains = status->chains; | |
1373 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1374 | int signal = status->chain_signal[i]; | |
1375 | ||
1376 | if (!(status->chains & BIT(i))) | |
1377 | continue; | |
1378 | ||
1379 | sta->chain_signal_last[i] = signal; | |
1380 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1381 | } | |
1382 | } | |
1383 | ||
72eaa43a JB |
1384 | /* |
1385 | * Change STA power saving mode only at the end of a frame | |
1386 | * exchange sequence. | |
1387 | */ | |
d057e5a3 AN |
1388 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1389 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1390 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1391 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1392 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1393 | /* PM bit is only checked in frames where it isn't reserved, | |
1394 | * in AP mode it's reserved in non-bufferable management frames | |
1395 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1396 | */ | |
1397 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1398 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1399 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1400 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1401 | sta_ps_end(sta); |
72eaa43a JB |
1402 | } else { |
1403 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1404 | sta_ps_start(sta); |
72eaa43a | 1405 | } |
571ecf67 JB |
1406 | } |
1407 | ||
3f52b7e3 MP |
1408 | /* mesh power save support */ |
1409 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1410 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1411 | ||
22403def JB |
1412 | /* |
1413 | * Drop (qos-)data::nullfunc frames silently, since they | |
1414 | * are used only to control station power saving mode. | |
1415 | */ | |
1416 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1417 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1418 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1419 | |
1420 | /* | |
1421 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1422 | * that was not moved to a 4-addr STA vlan yet send |
1423 | * the event to userspace and for older hostapd drop | |
1424 | * the frame to the monitor interface. | |
d524215f FF |
1425 | */ |
1426 | if (ieee80211_has_a4(hdr->frame_control) && | |
1427 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1428 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1429 | !rx->sdata->u.vlan.sta))) { |
1430 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1431 | cfg80211_rx_unexpected_4addr_frame( | |
1432 | rx->sdata->dev, sta->sta.addr, | |
1433 | GFP_ATOMIC); | |
d524215f | 1434 | return RX_DROP_MONITOR; |
e7f4a940 | 1435 | } |
22403def JB |
1436 | /* |
1437 | * Update counter and free packet here to avoid | |
1438 | * counting this as a dropped packed. | |
1439 | */ | |
571ecf67 JB |
1440 | sta->rx_packets++; |
1441 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1442 | return RX_QUEUED; |
571ecf67 JB |
1443 | } |
1444 | ||
9ae54c84 | 1445 | return RX_CONTINUE; |
571ecf67 JB |
1446 | } /* ieee80211_rx_h_sta_process */ |
1447 | ||
86c228a7 JA |
1448 | static ieee80211_rx_result debug_noinline |
1449 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1450 | { | |
1451 | struct sk_buff *skb = rx->skb; | |
1452 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1453 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1454 | int keyidx; | |
1455 | int hdrlen; | |
1456 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1457 | struct ieee80211_key *sta_ptk = NULL; | |
1458 | int mmie_keyidx = -1; | |
1459 | __le16 fc; | |
2475b1cc | 1460 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1461 | |
1462 | /* | |
1463 | * Key selection 101 | |
1464 | * | |
1465 | * There are four types of keys: | |
1466 | * - GTK (group keys) | |
1467 | * - IGTK (group keys for management frames) | |
1468 | * - PTK (pairwise keys) | |
1469 | * - STK (station-to-station pairwise keys) | |
1470 | * | |
1471 | * When selecting a key, we have to distinguish between multicast | |
1472 | * (including broadcast) and unicast frames, the latter can only | |
1473 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1474 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1475 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1476 | * don't have a PTK/STK we check the key index for a WEP key. | |
1477 | * | |
1478 | * Note that in a regular BSS, multicast frames are sent by the | |
1479 | * AP only, associated stations unicast the frame to the AP first | |
1480 | * which then multicasts it on their behalf. | |
1481 | * | |
1482 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1483 | * with each station, that is something we don't currently handle. | |
1484 | * The spec seems to expect that one negotiates the same key with | |
1485 | * every station but there's no such requirement; VLANs could be | |
1486 | * possible. | |
1487 | */ | |
1488 | ||
1489 | /* | |
1490 | * No point in finding a key and decrypting if the frame is neither | |
1491 | * addressed to us nor a multicast frame. | |
1492 | */ | |
1493 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1494 | return RX_CONTINUE; | |
1495 | ||
1496 | /* start without a key */ | |
1497 | rx->key = NULL; | |
2475b1cc | 1498 | fc = hdr->frame_control; |
86c228a7 | 1499 | |
2475b1cc MS |
1500 | if (rx->sta) { |
1501 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1502 | |
2475b1cc MS |
1503 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1504 | cs = rx->sta->cipher_scheme; | |
1505 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1506 | if (unlikely(keyid < 0)) | |
1507 | return RX_DROP_UNUSABLE; | |
1508 | } | |
1509 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1510 | } | |
86c228a7 JA |
1511 | |
1512 | if (!ieee80211_has_protected(fc)) | |
1513 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1514 | ||
1515 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1516 | rx->key = sta_ptk; | |
1517 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1518 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1519 | return RX_CONTINUE; | |
1520 | /* Skip decryption if the frame is not protected. */ | |
1521 | if (!ieee80211_has_protected(fc)) | |
1522 | return RX_CONTINUE; | |
1523 | } else if (mmie_keyidx >= 0) { | |
1524 | /* Broadcast/multicast robust management frame / BIP */ | |
1525 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1526 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1527 | return RX_CONTINUE; | |
1528 | ||
1529 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1530 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1531 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1532 | if (rx->sta) | |
1533 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1534 | if (!rx->key) | |
1535 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1536 | } else if (!ieee80211_has_protected(fc)) { | |
1537 | /* | |
1538 | * The frame was not protected, so skip decryption. However, we | |
1539 | * need to set rx->key if there is a key that could have been | |
1540 | * used so that the frame may be dropped if encryption would | |
1541 | * have been expected. | |
1542 | */ | |
1543 | struct ieee80211_key *key = NULL; | |
1544 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1545 | int i; | |
1546 | ||
1547 | if (ieee80211_is_mgmt(fc) && | |
1548 | is_multicast_ether_addr(hdr->addr1) && | |
1549 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1550 | rx->key = key; | |
1551 | else { | |
1552 | if (rx->sta) { | |
1553 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1554 | key = rcu_dereference(rx->sta->gtk[i]); | |
1555 | if (key) | |
1556 | break; | |
1557 | } | |
1558 | } | |
1559 | if (!key) { | |
1560 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1561 | key = rcu_dereference(sdata->keys[i]); | |
1562 | if (key) | |
1563 | break; | |
1564 | } | |
1565 | } | |
1566 | if (key) | |
1567 | rx->key = key; | |
1568 | } | |
1569 | return RX_CONTINUE; | |
1570 | } else { | |
1571 | u8 keyid; | |
2475b1cc | 1572 | |
86c228a7 JA |
1573 | /* |
1574 | * The device doesn't give us the IV so we won't be | |
1575 | * able to look up the key. That's ok though, we | |
1576 | * don't need to decrypt the frame, we just won't | |
1577 | * be able to keep statistics accurate. | |
1578 | * Except for key threshold notifications, should | |
1579 | * we somehow allow the driver to tell us which key | |
1580 | * the hardware used if this flag is set? | |
1581 | */ | |
1582 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1583 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1584 | return RX_CONTINUE; | |
1585 | ||
1586 | hdrlen = ieee80211_hdrlen(fc); | |
1587 | ||
2475b1cc MS |
1588 | if (cs) { |
1589 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1590 | |
2475b1cc MS |
1591 | if (unlikely(keyidx < 0)) |
1592 | return RX_DROP_UNUSABLE; | |
1593 | } else { | |
1594 | if (rx->skb->len < 8 + hdrlen) | |
1595 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1596 | /* | |
1597 | * no need to call ieee80211_wep_get_keyidx, | |
1598 | * it verifies a bunch of things we've done already | |
1599 | */ | |
1600 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1601 | keyidx = keyid >> 6; | |
1602 | } | |
86c228a7 JA |
1603 | |
1604 | /* check per-station GTK first, if multicast packet */ | |
1605 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1606 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1607 | ||
1608 | /* if not found, try default key */ | |
1609 | if (!rx->key) { | |
1610 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1611 | ||
1612 | /* | |
1613 | * RSNA-protected unicast frames should always be | |
1614 | * sent with pairwise or station-to-station keys, | |
1615 | * but for WEP we allow using a key index as well. | |
1616 | */ | |
1617 | if (rx->key && | |
1618 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1619 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1620 | !is_multicast_ether_addr(hdr->addr1)) | |
1621 | rx->key = NULL; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | if (rx->key) { | |
1626 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1627 | return RX_DROP_MONITOR; | |
1628 | ||
1629 | rx->key->tx_rx_count++; | |
1630 | /* TODO: add threshold stuff again */ | |
1631 | } else { | |
1632 | return RX_DROP_MONITOR; | |
1633 | } | |
1634 | ||
1635 | switch (rx->key->conf.cipher) { | |
1636 | case WLAN_CIPHER_SUITE_WEP40: | |
1637 | case WLAN_CIPHER_SUITE_WEP104: | |
1638 | result = ieee80211_crypto_wep_decrypt(rx); | |
1639 | break; | |
1640 | case WLAN_CIPHER_SUITE_TKIP: | |
1641 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1642 | break; | |
1643 | case WLAN_CIPHER_SUITE_CCMP: | |
1644 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1645 | break; | |
1646 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1647 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1648 | break; | |
1649 | default: | |
2475b1cc | 1650 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1651 | } |
1652 | ||
1653 | /* the hdr variable is invalid after the decrypt handlers */ | |
1654 | ||
1655 | /* either the frame has been decrypted or will be dropped */ | |
1656 | status->flag |= RX_FLAG_DECRYPTED; | |
1657 | ||
1658 | return result; | |
1659 | } | |
1660 | ||
571ecf67 JB |
1661 | static inline struct ieee80211_fragment_entry * |
1662 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1663 | unsigned int frag, unsigned int seq, int rx_queue, | |
1664 | struct sk_buff **skb) | |
1665 | { | |
1666 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1667 | |
571ecf67 JB |
1668 | entry = &sdata->fragments[sdata->fragment_next++]; |
1669 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1670 | sdata->fragment_next = 0; | |
1671 | ||
bdcbd8e0 | 1672 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1673 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1674 | |
1675 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1676 | *skb = NULL; | |
1677 | entry->first_frag_time = jiffies; | |
1678 | entry->seq = seq; | |
1679 | entry->rx_queue = rx_queue; | |
1680 | entry->last_frag = frag; | |
1681 | entry->ccmp = 0; | |
1682 | entry->extra_len = 0; | |
1683 | ||
1684 | return entry; | |
1685 | } | |
1686 | ||
1687 | static inline struct ieee80211_fragment_entry * | |
1688 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1689 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1690 | int rx_queue, struct ieee80211_hdr *hdr) |
1691 | { | |
1692 | struct ieee80211_fragment_entry *entry; | |
1693 | int i, idx; | |
1694 | ||
1695 | idx = sdata->fragment_next; | |
1696 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1697 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1698 | |
1699 | idx--; | |
1700 | if (idx < 0) | |
1701 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1702 | ||
1703 | entry = &sdata->fragments[idx]; | |
1704 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1705 | entry->rx_queue != rx_queue || | |
1706 | entry->last_frag + 1 != frag) | |
1707 | continue; | |
1708 | ||
b73d70ad | 1709 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1710 | |
b73d70ad HH |
1711 | /* |
1712 | * Check ftype and addresses are equal, else check next fragment | |
1713 | */ | |
1714 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1715 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1716 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1717 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1718 | continue; |
1719 | ||
ab46623e | 1720 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1721 | __skb_queue_purge(&entry->skb_list); |
1722 | continue; | |
1723 | } | |
1724 | return entry; | |
1725 | } | |
1726 | ||
1727 | return NULL; | |
1728 | } | |
1729 | ||
49461622 | 1730 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1731 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1732 | { |
1733 | struct ieee80211_hdr *hdr; | |
1734 | u16 sc; | |
358c8d9d | 1735 | __le16 fc; |
571ecf67 JB |
1736 | unsigned int frag, seq; |
1737 | struct ieee80211_fragment_entry *entry; | |
1738 | struct sk_buff *skb; | |
554891e6 | 1739 | struct ieee80211_rx_status *status; |
571ecf67 | 1740 | |
b73d70ad | 1741 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1742 | fc = hdr->frame_control; |
f7fbf70e JC |
1743 | |
1744 | if (ieee80211_is_ctl(fc)) | |
1745 | return RX_CONTINUE; | |
1746 | ||
571ecf67 JB |
1747 | sc = le16_to_cpu(hdr->seq_ctrl); |
1748 | frag = sc & IEEE80211_SCTL_FRAG; | |
1749 | ||
358c8d9d | 1750 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1751 | is_multicast_ether_addr(hdr->addr1))) { |
1752 | /* not fragmented */ | |
1753 | goto out; | |
1754 | } | |
1755 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1756 | ||
e3cf8b3f ZY |
1757 | if (skb_linearize(rx->skb)) |
1758 | return RX_DROP_UNUSABLE; | |
1759 | ||
058897a4 AK |
1760 | /* |
1761 | * skb_linearize() might change the skb->data and | |
1762 | * previously cached variables (in this case, hdr) need to | |
1763 | * be refreshed with the new data. | |
1764 | */ | |
1765 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1766 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1767 | ||
1768 | if (frag == 0) { | |
1769 | /* This is the first fragment of a new frame. */ | |
1770 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1771 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1772 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1773 | ieee80211_has_protected(fc)) { |
9e26297a | 1774 | int queue = rx->security_idx; |
571ecf67 JB |
1775 | /* Store CCMP PN so that we can verify that the next |
1776 | * fragment has a sequential PN value. */ | |
1777 | entry->ccmp = 1; | |
1778 | memcpy(entry->last_pn, | |
9190252c | 1779 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1780 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1781 | } |
9ae54c84 | 1782 | return RX_QUEUED; |
571ecf67 JB |
1783 | } |
1784 | ||
1785 | /* This is a fragment for a frame that should already be pending in | |
1786 | * fragment cache. Add this fragment to the end of the pending entry. | |
1787 | */ | |
9e26297a JB |
1788 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1789 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1790 | if (!entry) { |
1791 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1792 | return RX_DROP_MONITOR; |
571ecf67 JB |
1793 | } |
1794 | ||
1795 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1796 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1797 | if (entry->ccmp) { | |
1798 | int i; | |
4325f6ca | 1799 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1800 | int queue; |
97359d12 | 1801 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1802 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1803 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1804 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1805 | pn[i]++; |
1806 | if (pn[i]) | |
1807 | break; | |
1808 | } | |
9e26297a | 1809 | queue = rx->security_idx; |
9190252c | 1810 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1811 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1812 | return RX_DROP_UNUSABLE; |
4325f6ca | 1813 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1814 | } |
1815 | ||
358c8d9d | 1816 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1817 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1818 | entry->last_frag = frag; | |
1819 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1820 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1821 | rx->skb = NULL; |
9ae54c84 | 1822 | return RX_QUEUED; |
571ecf67 JB |
1823 | } |
1824 | ||
1825 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1826 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1827 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1828 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1829 | GFP_ATOMIC))) { | |
1830 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1831 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1832 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1833 | } |
1834 | } | |
1835 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1836 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1837 | dev_kfree_skb(skb); | |
1838 | } | |
1839 | ||
1840 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1841 | status = IEEE80211_SKB_RXCB(rx->skb); |
1842 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1843 | |
1844 | out: | |
1845 | if (rx->sta) | |
1846 | rx->sta->rx_packets++; | |
1847 | if (is_multicast_ether_addr(hdr->addr1)) | |
1848 | rx->local->dot11MulticastReceivedFrameCount++; | |
1849 | else | |
1850 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1851 | return RX_CONTINUE; |
571ecf67 JB |
1852 | } |
1853 | ||
1df332e8 | 1854 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1855 | { |
1df332e8 | 1856 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1857 | return -EACCES; |
571ecf67 | 1858 | |
76ee65bf | 1859 | return 0; |
571ecf67 JB |
1860 | } |
1861 | ||
1df332e8 | 1862 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1863 | { |
eb9fb5b8 JB |
1864 | struct sk_buff *skb = rx->skb; |
1865 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1866 | ||
3017b80b | 1867 | /* |
7848ba7d JB |
1868 | * Pass through unencrypted frames if the hardware has |
1869 | * decrypted them already. | |
3017b80b | 1870 | */ |
eb9fb5b8 | 1871 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1872 | return 0; |
571ecf67 JB |
1873 | |
1874 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1875 | if (unlikely(!ieee80211_has_protected(fc) && |
1876 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1877 | ieee80211_is_data(fc) && |
b3fc9c6c | 1878 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1879 | return -EACCES; |
bef5d1c7 JB |
1880 | |
1881 | return 0; | |
1882 | } | |
1883 | ||
1df332e8 | 1884 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1885 | { |
1886 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1887 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1888 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1889 | |
e3efca0a JM |
1890 | /* |
1891 | * Pass through unencrypted frames if the hardware has | |
1892 | * decrypted them already. | |
1893 | */ | |
1894 | if (status->flag & RX_FLAG_DECRYPTED) | |
1895 | return 0; | |
bef5d1c7 | 1896 | |
c2c98fde | 1897 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1898 | if (unlikely(!ieee80211_has_protected(fc) && |
1899 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1900 | rx->key)) { |
6ff57cf8 JB |
1901 | if (ieee80211_is_deauth(fc) || |
1902 | ieee80211_is_disassoc(fc)) | |
1903 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1904 | rx->skb->data, | |
1905 | rx->skb->len); | |
f2ca3ea4 | 1906 | return -EACCES; |
cf4e594e | 1907 | } |
f2ca3ea4 | 1908 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1909 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1910 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1911 | if (ieee80211_is_deauth(fc) || |
1912 | ieee80211_is_disassoc(fc)) | |
1913 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1914 | rx->skb->data, | |
1915 | rx->skb->len); | |
f2ca3ea4 | 1916 | return -EACCES; |
cf4e594e | 1917 | } |
f2ca3ea4 JM |
1918 | /* |
1919 | * When using MFP, Action frames are not allowed prior to | |
1920 | * having configured keys. | |
1921 | */ | |
1922 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1923 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1924 | return -EACCES; |
1925 | } | |
b3fc9c6c | 1926 | |
76ee65bf | 1927 | return 0; |
571ecf67 JB |
1928 | } |
1929 | ||
76ee65bf | 1930 | static int |
4114fa21 | 1931 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1932 | { |
eb9fb5b8 | 1933 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1934 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1935 | bool check_port_control = false; |
1936 | struct ethhdr *ehdr; | |
1937 | int ret; | |
f14543ee | 1938 | |
4114fa21 | 1939 | *port_control = false; |
9bc383de JB |
1940 | if (ieee80211_has_a4(hdr->frame_control) && |
1941 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1942 | return -1; |
9bc383de | 1943 | |
fbb327c5 FF |
1944 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1945 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1946 | ||
1947 | if (!sdata->u.mgd.use_4addr) | |
1948 | return -1; | |
1949 | else | |
1950 | check_port_control = true; | |
1951 | } | |
1952 | ||
9bc383de | 1953 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1954 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1955 | return -1; |
571ecf67 | 1956 | |
fbb327c5 | 1957 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1958 | if (ret < 0) |
fbb327c5 FF |
1959 | return ret; |
1960 | ||
1961 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1962 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1963 | *port_control = true; | |
1964 | else if (check_port_control) | |
fbb327c5 FF |
1965 | return -1; |
1966 | ||
1967 | return 0; | |
76ee65bf | 1968 | } |
571ecf67 | 1969 | |
ce3edf6d JB |
1970 | /* |
1971 | * requires that rx->skb is a frame with ethernet header | |
1972 | */ | |
358c8d9d | 1973 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1974 | { |
c97c23e3 | 1975 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1976 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1977 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1978 | ||
1979 | /* | |
1980 | * Allow EAPOL frames to us/the PAE group address regardless | |
1981 | * of whether the frame was encrypted or not. | |
1982 | */ | |
a621fa4d | 1983 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1984 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1985 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1986 | return true; |
1987 | ||
1988 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1989 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1990 | return false; |
1991 | ||
1992 | return true; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * requires that rx->skb is a frame with ethernet header | |
1997 | */ | |
76ee65bf | 1998 | static void |
5cf121c3 | 1999 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2000 | { |
eb9fb5b8 JB |
2001 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2002 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2003 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2004 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2005 | struct sta_info *dsta; | |
554891e6 | 2006 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 2007 | |
76ee65bf RR |
2008 | skb = rx->skb; |
2009 | xmit_skb = NULL; | |
571ecf67 | 2010 | |
05c914fe JB |
2011 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2012 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2013 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 2014 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 2015 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
2016 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
2017 | /* | |
2018 | * send multicast frames both to higher layers in | |
2019 | * local net stack and back to the wireless medium | |
2020 | */ | |
76ee65bf | 2021 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2022 | if (!xmit_skb) |
bdcbd8e0 | 2023 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2024 | dev->name); |
571ecf67 | 2025 | } else { |
abe60632 JB |
2026 | dsta = sta_info_get(sdata, skb->data); |
2027 | if (dsta) { | |
ce3edf6d JB |
2028 | /* |
2029 | * The destination station is associated to | |
2030 | * this AP (in this VLAN), so send the frame | |
2031 | * directly to it and do not pass it to local | |
2032 | * net stack. | |
571ecf67 | 2033 | */ |
76ee65bf | 2034 | xmit_skb = skb; |
571ecf67 JB |
2035 | skb = NULL; |
2036 | } | |
571ecf67 JB |
2037 | } |
2038 | } | |
2039 | ||
59d9cb07 | 2040 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2041 | if (skb) { |
2042 | /* 'align' will only take the values 0 or 2 here since all | |
2043 | * frames are required to be aligned to 2-byte boundaries | |
2044 | * when being passed to mac80211; the code here works just | |
2045 | * as well if that isn't true, but mac80211 assumes it can | |
2046 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2047 | */ |
9e890a1f JB |
2048 | int align; |
2049 | ||
2050 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2051 | if (align) { |
2052 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2053 | dev_kfree_skb(skb); | |
2054 | skb = NULL; | |
2055 | } else { | |
2056 | u8 *data = skb->data; | |
8ce0b589 ZY |
2057 | size_t len = skb_headlen(skb); |
2058 | skb->data -= align; | |
2059 | memmove(skb->data, data, len); | |
2060 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2061 | } |
2062 | } | |
9e890a1f | 2063 | } |
d1c3a37c JB |
2064 | #endif |
2065 | ||
9e890a1f JB |
2066 | if (skb) { |
2067 | /* deliver to local stack */ | |
2068 | skb->protocol = eth_type_trans(skb, dev); | |
2069 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
2070 | if (rx->local->napi) |
2071 | napi_gro_receive(rx->local->napi, skb); | |
2072 | else | |
2073 | netif_receive_skb(skb); | |
571ecf67 JB |
2074 | } |
2075 | ||
76ee65bf | 2076 | if (xmit_skb) { |
aef6c928 HS |
2077 | /* |
2078 | * Send to wireless media and increase priority by 256 to | |
2079 | * keep the received priority instead of reclassifying | |
2080 | * the frame (see cfg80211_classify8021d). | |
2081 | */ | |
2082 | xmit_skb->priority += 256; | |
f831e909 | 2083 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2084 | skb_reset_network_header(xmit_skb); |
2085 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2086 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2087 | } |
76ee65bf RR |
2088 | } |
2089 | ||
49461622 | 2090 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2091 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2092 | { |
eb9fb5b8 | 2093 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2094 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2095 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2096 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2097 | struct sk_buff_head frame_list; |
554891e6 | 2098 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2099 | |
358c8d9d | 2100 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2101 | return RX_CONTINUE; |
fd4c7f2f | 2102 | |
358c8d9d | 2103 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2104 | return RX_DROP_MONITOR; |
fd4c7f2f | 2105 | |
554891e6 | 2106 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2107 | return RX_CONTINUE; |
fd4c7f2f | 2108 | |
eaf85ca7 ZY |
2109 | if (ieee80211_has_a4(hdr->frame_control) && |
2110 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2111 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2112 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2113 | |
eaf85ca7 ZY |
2114 | if (is_multicast_ether_addr(hdr->addr1) && |
2115 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2116 | rx->sdata->u.vlan.sta) || | |
2117 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2118 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2119 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2120 | |
eaf85ca7 ZY |
2121 | skb->dev = dev; |
2122 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2123 | |
e3cf8b3f ZY |
2124 | if (skb_linearize(skb)) |
2125 | return RX_DROP_UNUSABLE; | |
2126 | ||
eaf85ca7 ZY |
2127 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2128 | rx->sdata->vif.type, | |
8b3becad | 2129 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2130 | |
eaf85ca7 ZY |
2131 | while (!skb_queue_empty(&frame_list)) { |
2132 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2133 | |
358c8d9d | 2134 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2135 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2136 | continue; |
2137 | } | |
eaf85ca7 ZY |
2138 | dev->stats.rx_packets++; |
2139 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2140 | |
2141 | ieee80211_deliver_skb(rx); | |
2142 | } | |
2143 | ||
9ae54c84 | 2144 | return RX_QUEUED; |
fd4c7f2f RR |
2145 | } |
2146 | ||
bf94e17b | 2147 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2148 | static ieee80211_rx_result |
e32f85f7 LCC |
2149 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2150 | { | |
30789eb6 TP |
2151 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2152 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2153 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2154 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2155 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2156 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2157 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2158 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2159 | u16 q, hdrlen; |
e32f85f7 LCC |
2160 | |
2161 | hdr = (struct ieee80211_hdr *) skb->data; | |
2162 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2163 | |
2164 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2165 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2166 | return RX_DROP_MONITOR; | |
2167 | ||
2168 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2169 | ||
2170 | /* make sure full mesh header is there, also checks skb len */ | |
2171 | if (!pskb_may_pull(rx->skb, | |
2172 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2173 | return RX_DROP_MONITOR; | |
2174 | ||
2175 | /* reload pointers */ | |
2176 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2177 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2178 | ||
2157fdd6 TP |
2179 | /* frame is in RMC, don't forward */ |
2180 | if (ieee80211_is_data(hdr->frame_control) && | |
2181 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2182 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2183 | return RX_DROP_MONITOR; |
2184 | ||
555cb715 JC |
2185 | if (!ieee80211_is_data(hdr->frame_control) || |
2186 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2187 | return RX_CONTINUE; |
2188 | ||
2189 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2190 | return RX_DROP_MONITOR; |
2191 | ||
43b7b314 | 2192 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2193 | struct mesh_path *mppath; |
43b7b314 JC |
2194 | char *proxied_addr; |
2195 | char *mpp_addr; | |
2196 | ||
2197 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2198 | mpp_addr = hdr->addr3; | |
2199 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2200 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2201 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2202 | mpp_addr = hdr->addr4; |
2203 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2204 | } else { |
2205 | return RX_DROP_MONITOR; | |
43b7b314 | 2206 | } |
79617dee | 2207 | |
79617dee | 2208 | rcu_read_lock(); |
bf7cd94d | 2209 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2210 | if (!mppath) { |
bf7cd94d | 2211 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2212 | } else { |
2213 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2214 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2215 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2216 | spin_unlock_bh(&mppath->state_lock); |
2217 | } | |
2218 | rcu_read_unlock(); | |
2219 | } | |
2220 | ||
3c5772a5 JC |
2221 | /* Frame has reached destination. Don't forward */ |
2222 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2223 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2224 | return RX_CONTINUE; |
2225 | ||
00e96dec | 2226 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2227 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2228 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2229 | return RX_DROP_MONITOR; |
2230 | } | |
2231 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2232 | |
30789eb6 TP |
2233 | if (!--mesh_hdr->ttl) { |
2234 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2235 | goto out; |
30789eb6 TP |
2236 | } |
2237 | ||
d665508b CYY |
2238 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2239 | goto out; | |
2240 | ||
30789eb6 TP |
2241 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2242 | if (!fwd_skb) { | |
bdcbd8e0 | 2243 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2244 | sdata->name); |
30789eb6 TP |
2245 | goto out; |
2246 | } | |
2247 | ||
2248 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2249 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2250 | info = IEEE80211_SKB_CB(fwd_skb); |
2251 | memset(info, 0, sizeof(*info)); | |
2252 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2253 | info->control.vif = &rx->sdata->vif; | |
2254 | info->control.jiffies = jiffies; | |
2255 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2256 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2257 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2258 | /* update power mode indication when forwarding */ |
2259 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2260 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2261 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2262 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2263 | } else { | |
2264 | /* unable to resolve next hop */ | |
bf7cd94d | 2265 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2266 | fwd_hdr->addr3, 0, |
2267 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2268 | fwd_hdr->addr2); | |
30789eb6 | 2269 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2270 | kfree_skb(fwd_skb); |
30789eb6 | 2271 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2272 | } |
2273 | ||
30789eb6 TP |
2274 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2275 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2276 | out: |
3c5772a5 | 2277 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2278 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2279 | return RX_CONTINUE; |
2280 | else | |
2281 | return RX_DROP_MONITOR; | |
2282 | } | |
bf94e17b | 2283 | #endif |
e32f85f7 | 2284 | |
49461622 | 2285 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2286 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2287 | { |
eb9fb5b8 | 2288 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2289 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2290 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2291 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2292 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2293 | bool port_control; |
ce3edf6d | 2294 | int err; |
76ee65bf | 2295 | |
358c8d9d | 2296 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2297 | return RX_CONTINUE; |
76ee65bf | 2298 | |
358c8d9d | 2299 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2300 | return RX_DROP_MONITOR; |
76ee65bf | 2301 | |
f14543ee | 2302 | /* |
e7f4a940 JB |
2303 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2304 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2305 | */ |
2306 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2307 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2308 | if (rx->sta && | |
2309 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2310 | cfg80211_rx_unexpected_4addr_frame( | |
2311 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2312 | return RX_DROP_MONITOR; |
e7f4a940 | 2313 | } |
f14543ee | 2314 | |
4114fa21 | 2315 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2316 | if (unlikely(err)) |
e4c26add | 2317 | return RX_DROP_UNUSABLE; |
76ee65bf | 2318 | |
358c8d9d | 2319 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2320 | return RX_DROP_MONITOR; |
ce3edf6d | 2321 | |
4114fa21 FF |
2322 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2323 | unlikely(port_control) && sdata->bss) { | |
2324 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2325 | u.ap); | |
2326 | dev = sdata->dev; | |
2327 | rx->sdata = sdata; | |
2328 | } | |
2329 | ||
76ee65bf RR |
2330 | rx->skb->dev = dev; |
2331 | ||
2332 | dev->stats.rx_packets++; | |
2333 | dev->stats.rx_bytes += rx->skb->len; | |
2334 | ||
08ca944e | 2335 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2336 | !is_multicast_ether_addr( |
2337 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2338 | (!local->scanning && | |
2339 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2340 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2341 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2342 | } | |
2343 | ||
76ee65bf | 2344 | ieee80211_deliver_skb(rx); |
571ecf67 | 2345 | |
9ae54c84 | 2346 | return RX_QUEUED; |
571ecf67 JB |
2347 | } |
2348 | ||
49461622 | 2349 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2350 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2351 | { |
71364716 | 2352 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2353 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2354 | struct tid_ampdu_rx *tid_agg_rx; |
2355 | u16 start_seq_num; | |
2356 | u16 tid; | |
2357 | ||
a7767f95 | 2358 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2359 | return RX_CONTINUE; |
71364716 | 2360 | |
a7767f95 | 2361 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2362 | struct { |
2363 | __le16 control, start_seq_num; | |
2364 | } __packed bar_data; | |
2365 | ||
71364716 | 2366 | if (!rx->sta) |
a02ae758 | 2367 | return RX_DROP_MONITOR; |
8ae5977f JB |
2368 | |
2369 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2370 | &bar_data, sizeof(bar_data))) | |
2371 | return RX_DROP_MONITOR; | |
2372 | ||
8ae5977f | 2373 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2374 | |
2375 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2376 | if (!tid_agg_rx) | |
a02ae758 | 2377 | return RX_DROP_MONITOR; |
71364716 | 2378 | |
8ae5977f | 2379 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2380 | |
2381 | /* reset session timer */ | |
20ad19d0 JB |
2382 | if (tid_agg_rx->timeout) |
2383 | mod_timer(&tid_agg_rx->session_timer, | |
2384 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2385 | |
dd318575 | 2386 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2387 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2388 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2389 | start_seq_num, frames); |
dd318575 JB |
2390 | spin_unlock(&tid_agg_rx->reorder_lock); |
2391 | ||
a02ae758 JB |
2392 | kfree_skb(skb); |
2393 | return RX_QUEUED; | |
71364716 RR |
2394 | } |
2395 | ||
08daecae JB |
2396 | /* |
2397 | * After this point, we only want management frames, | |
2398 | * so we can drop all remaining control frames to | |
2399 | * cooked monitor interfaces. | |
2400 | */ | |
2401 | return RX_DROP_MONITOR; | |
71364716 RR |
2402 | } |
2403 | ||
f4f727a6 JM |
2404 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2405 | struct ieee80211_mgmt *mgmt, | |
2406 | size_t len) | |
fea14732 JM |
2407 | { |
2408 | struct ieee80211_local *local = sdata->local; | |
2409 | struct sk_buff *skb; | |
2410 | struct ieee80211_mgmt *resp; | |
2411 | ||
b203ca39 | 2412 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2413 | /* Not to own unicast address */ |
2414 | return; | |
2415 | } | |
2416 | ||
b203ca39 JP |
2417 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2418 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2419 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2420 | return; |
2421 | } | |
2422 | ||
2423 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2424 | /* Too short SA Query request frame */ | |
2425 | return; | |
2426 | } | |
2427 | ||
2428 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2429 | if (skb == NULL) | |
2430 | return; | |
2431 | ||
2432 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2433 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2434 | memset(resp, 0, 24); | |
2435 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2436 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2437 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2438 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2439 | IEEE80211_STYPE_ACTION); | |
2440 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2441 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2442 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2443 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2444 | mgmt->u.action.u.sa_query.trans_id, | |
2445 | WLAN_SA_QUERY_TR_ID_LEN); | |
2446 | ||
62ae67be | 2447 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2448 | } |
2449 | ||
2e161f78 JB |
2450 | static ieee80211_rx_result debug_noinline |
2451 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2452 | { | |
2453 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2454 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2455 | |
2456 | /* | |
2457 | * From here on, look only at management frames. | |
2458 | * Data and control frames are already handled, | |
2459 | * and unknown (reserved) frames are useless. | |
2460 | */ | |
2461 | if (rx->skb->len < 24) | |
2462 | return RX_DROP_MONITOR; | |
2463 | ||
2464 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2465 | return RX_DROP_MONITOR; | |
2466 | ||
ee971924 JB |
2467 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2468 | ieee80211_is_beacon(mgmt->frame_control) && | |
2469 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2470 | int sig = 0; |
2471 | ||
2472 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2473 | sig = status->signal; | |
2474 | ||
ee971924 JB |
2475 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2476 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2477 | status->freq, sig); |
ee971924 JB |
2478 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2479 | } | |
2480 | ||
554891e6 | 2481 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2482 | return RX_DROP_MONITOR; |
2483 | ||
2484 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2485 | return RX_DROP_UNUSABLE; | |
2486 | ||
2487 | return RX_CONTINUE; | |
2488 | } | |
2489 | ||
de1ede7a JB |
2490 | static ieee80211_rx_result debug_noinline |
2491 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2492 | { | |
2493 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2494 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2495 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2496 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2497 | int len = rx->skb->len; |
2498 | ||
2499 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2500 | return RX_CONTINUE; | |
2501 | ||
026331c4 JM |
2502 | /* drop too small frames */ |
2503 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2504 | return RX_DROP_UNUSABLE; |
de1ede7a | 2505 | |
815b8092 | 2506 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2507 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2508 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2509 | return RX_DROP_UNUSABLE; |
de1ede7a | 2510 | |
554891e6 | 2511 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2512 | return RX_DROP_UNUSABLE; |
97ebe12a | 2513 | |
de1ede7a | 2514 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2515 | case WLAN_CATEGORY_HT: |
2516 | /* reject HT action frames from stations not supporting HT */ | |
2517 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2518 | goto invalid; | |
2519 | ||
2520 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2521 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2522 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2523 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2524 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2525 | break; | |
2526 | ||
ec61cd63 | 2527 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2528 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2529 | goto invalid; | |
2530 | ||
2531 | switch (mgmt->u.action.u.ht_smps.action) { | |
2532 | case WLAN_HT_ACTION_SMPS: { | |
2533 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2534 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2535 | |
2536 | /* convert to HT capability */ | |
2537 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2538 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2539 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2540 | break; |
2541 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2542 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2543 | break; |
2544 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2545 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2546 | break; |
2547 | default: | |
2548 | goto invalid; | |
2549 | } | |
1d8d3dec JB |
2550 | |
2551 | /* if no change do nothing */ | |
af0ed69b | 2552 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2553 | goto handled; |
af0ed69b | 2554 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2555 | |
2556 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2557 | ||
64f68e5d JB |
2558 | rate_control_rate_update(local, sband, rx->sta, |
2559 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2560 | goto handled; |
2561 | } | |
ec61cd63 JB |
2562 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2563 | struct ieee80211_supported_band *sband; | |
2564 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2565 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2566 | |
2567 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2568 | if (!(rx->sta->sta.ht_cap.cap & |
2569 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2570 | goto handled; |
2571 | ||
e1a0c6b3 JB |
2572 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2573 | new_bw = IEEE80211_STA_RX_BW_20; | |
2574 | else | |
2575 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2576 | |
e1a0c6b3 | 2577 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2578 | goto handled; |
2579 | ||
ec61cd63 JB |
2580 | sband = rx->local->hw.wiphy->bands[status->band]; |
2581 | ||
2582 | rate_control_rate_update(local, sband, rx->sta, | |
2583 | IEEE80211_RC_BW_CHANGED); | |
2584 | goto handled; | |
2585 | } | |
1d8d3dec JB |
2586 | default: |
2587 | goto invalid; | |
2588 | } | |
2589 | ||
0af83d3d | 2590 | break; |
1b3a2e49 JB |
2591 | case WLAN_CATEGORY_PUBLIC: |
2592 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2593 | goto invalid; | |
2594 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2595 | break; | |
2596 | if (!rx->sta) | |
2597 | break; | |
2598 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2599 | break; | |
2600 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2601 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2602 | break; | |
2603 | if (len < offsetof(struct ieee80211_mgmt, | |
2604 | u.action.u.ext_chan_switch.variable)) | |
2605 | goto invalid; | |
2606 | goto queue; | |
0af83d3d JB |
2607 | case WLAN_CATEGORY_VHT: |
2608 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2609 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2610 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2611 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2612 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2613 | break; | |
2614 | ||
2615 | /* verify action code is present */ | |
2616 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2617 | goto invalid; | |
2618 | ||
2619 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2620 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2621 | u8 opmode; | |
2622 | ||
2623 | /* verify opmode is present */ | |
2624 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2625 | goto invalid; | |
2626 | ||
2627 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2628 | ||
2629 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2630 | opmode, status->band, |
2631 | false); | |
0af83d3d JB |
2632 | goto handled; |
2633 | } | |
2634 | default: | |
2635 | break; | |
2636 | } | |
1d8d3dec | 2637 | break; |
de1ede7a | 2638 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2639 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2640 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2641 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2642 | sdata->vif.type != NL80211_IFTYPE_AP && |
2643 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2644 | break; |
8abd3f9b | 2645 | |
026331c4 JM |
2646 | /* verify action_code is present */ |
2647 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2648 | break; | |
2649 | ||
de1ede7a JB |
2650 | switch (mgmt->u.action.u.addba_req.action_code) { |
2651 | case WLAN_ACTION_ADDBA_REQ: | |
2652 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2653 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2654 | goto invalid; |
2655 | break; | |
de1ede7a JB |
2656 | case WLAN_ACTION_ADDBA_RESP: |
2657 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2658 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2659 | goto invalid; |
2660 | break; | |
de1ede7a JB |
2661 | case WLAN_ACTION_DELBA: |
2662 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2663 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2664 | goto invalid; |
2665 | break; | |
2666 | default: | |
2667 | goto invalid; | |
de1ede7a | 2668 | } |
bed7ee6e | 2669 | |
8b58ff83 | 2670 | goto queue; |
39192c0b | 2671 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2672 | /* verify action_code is present */ |
2673 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2674 | break; | |
2675 | ||
39192c0b JB |
2676 | switch (mgmt->u.action.u.measurement.action_code) { |
2677 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2678 | if (status->band != IEEE80211_BAND_5GHZ) |
2679 | break; | |
2680 | ||
39192c0b JB |
2681 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2682 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2683 | break; |
cd7760e6 SW |
2684 | |
2685 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2686 | break; | |
2687 | ||
39192c0b | 2688 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2689 | goto handled; |
cd7760e6 SW |
2690 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2691 | u8 *bssid; | |
2692 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2693 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2694 | break; |
cc32abd4 | 2695 | |
cd7760e6 | 2696 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2697 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2698 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2699 | break; |
2700 | ||
2701 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2702 | bssid = sdata->u.mgd.bssid; | |
2703 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2704 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2705 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2706 | bssid = mgmt->sa; | |
cd7760e6 SW |
2707 | else |
2708 | break; | |
2709 | ||
2710 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2711 | break; |
c481ec97 | 2712 | |
8b58ff83 | 2713 | goto queue; |
cd7760e6 | 2714 | } |
39192c0b JB |
2715 | } |
2716 | break; | |
fea14732 JM |
2717 | case WLAN_CATEGORY_SA_QUERY: |
2718 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2719 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2720 | break; |
2721 | ||
fea14732 JM |
2722 | switch (mgmt->u.action.u.sa_query.action) { |
2723 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2724 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2725 | break; |
fea14732 | 2726 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2727 | goto handled; |
fea14732 JM |
2728 | } |
2729 | break; | |
8db09850 | 2730 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2731 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2732 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2733 | break; | |
2734 | ||
8db09850 TP |
2735 | switch (mgmt->u.action.u.self_prot.action_code) { |
2736 | case WLAN_SP_MESH_PEERING_OPEN: | |
2737 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2738 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2739 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2740 | goto invalid; | |
a6dad6a2 | 2741 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2742 | /* userspace handles this frame */ |
2743 | break; | |
2744 | goto queue; | |
2745 | case WLAN_SP_MGK_INFORM: | |
2746 | case WLAN_SP_MGK_ACK: | |
2747 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2748 | goto invalid; | |
2749 | break; | |
2750 | } | |
2751 | break; | |
d3aaec8a | 2752 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2753 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2754 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2755 | break; | |
2756 | ||
77a121c3 JB |
2757 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2758 | break; | |
25d49e4d | 2759 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2760 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2761 | break; |
2762 | goto queue; | |
84040805 | 2763 | } |
026331c4 | 2764 | |
2e161f78 JB |
2765 | return RX_CONTINUE; |
2766 | ||
bed7ee6e | 2767 | invalid: |
554891e6 | 2768 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2769 | /* will return in the next handlers */ |
2770 | return RX_CONTINUE; | |
2771 | ||
2772 | handled: | |
2773 | if (rx->sta) | |
2774 | rx->sta->rx_packets++; | |
2775 | dev_kfree_skb(rx->skb); | |
2776 | return RX_QUEUED; | |
2777 | ||
2778 | queue: | |
2779 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2780 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2781 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2782 | if (rx->sta) | |
2783 | rx->sta->rx_packets++; | |
2784 | return RX_QUEUED; | |
2785 | } | |
2786 | ||
2787 | static ieee80211_rx_result debug_noinline | |
2788 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2789 | { | |
554891e6 | 2790 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2791 | int sig = 0; |
2e161f78 JB |
2792 | |
2793 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2794 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2795 | return RX_CONTINUE; |
d7907448 | 2796 | |
026331c4 JM |
2797 | /* |
2798 | * Getting here means the kernel doesn't know how to handle | |
2799 | * it, but maybe userspace does ... include returned frames | |
2800 | * so userspace can register for those to know whether ones | |
2801 | * it transmitted were processed or returned. | |
2802 | */ | |
026331c4 | 2803 | |
804483e9 JB |
2804 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2805 | sig = status->signal; | |
2806 | ||
71bbc994 | 2807 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2808 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 JB |
2809 | if (rx->sta) |
2810 | rx->sta->rx_packets++; | |
2811 | dev_kfree_skb(rx->skb); | |
2812 | return RX_QUEUED; | |
2813 | } | |
2814 | ||
2e161f78 JB |
2815 | return RX_CONTINUE; |
2816 | } | |
2817 | ||
2818 | static ieee80211_rx_result debug_noinline | |
2819 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2820 | { | |
2821 | struct ieee80211_local *local = rx->local; | |
2822 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2823 | struct sk_buff *nskb; | |
2824 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2825 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2826 | |
2827 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2828 | return RX_CONTINUE; | |
2829 | ||
2830 | /* | |
2831 | * For AP mode, hostapd is responsible for handling any action | |
2832 | * frames that we didn't handle, including returning unknown | |
2833 | * ones. For all other modes we will return them to the sender, | |
2834 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2835 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2836 | * Newer versions of hostapd shall also use the management frame |
2837 | * registration mechanisms, but older ones still use cooked | |
2838 | * monitor interfaces so push all frames there. | |
2839 | */ | |
554891e6 | 2840 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2841 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2842 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2843 | return RX_DROP_MONITOR; | |
026331c4 | 2844 | |
4b5ebccc JB |
2845 | if (is_multicast_ether_addr(mgmt->da)) |
2846 | return RX_DROP_MONITOR; | |
2847 | ||
84040805 JB |
2848 | /* do not return rejected action frames */ |
2849 | if (mgmt->u.action.category & 0x80) | |
2850 | return RX_DROP_UNUSABLE; | |
2851 | ||
2852 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2853 | GFP_ATOMIC); | |
2854 | if (nskb) { | |
292b4df6 | 2855 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2856 | |
292b4df6 JL |
2857 | nmgmt->u.action.category |= 0x80; |
2858 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2859 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2860 | |
2861 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2862 | ||
07e5a5f5 JB |
2863 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2864 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2865 | ||
2866 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2867 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2868 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2869 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2870 | info->hw_queue = | |
2871 | local->hw.offchannel_tx_hw_queue; | |
2872 | } | |
2873 | ||
2874 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2875 | status->band); | |
de1ede7a | 2876 | } |
39192c0b JB |
2877 | dev_kfree_skb(rx->skb); |
2878 | return RX_QUEUED; | |
de1ede7a JB |
2879 | } |
2880 | ||
49461622 | 2881 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2882 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2883 | { |
eb9fb5b8 | 2884 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2885 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2886 | __le16 stype; | |
571ecf67 | 2887 | |
77a121c3 | 2888 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2889 | |
77a121c3 JB |
2890 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2891 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 2892 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
2893 | sdata->vif.type != NL80211_IFTYPE_STATION) |
2894 | return RX_DROP_MONITOR; | |
472dbc45 | 2895 | |
77a121c3 | 2896 | switch (stype) { |
66e67e41 | 2897 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2898 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2899 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2900 | /* process for all: mesh, mlme, ibss */ | |
2901 | break; | |
66e67e41 JB |
2902 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2903 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2904 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2905 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2906 | if (is_multicast_ether_addr(mgmt->da) && |
2907 | !is_broadcast_ether_addr(mgmt->da)) | |
2908 | return RX_DROP_MONITOR; | |
2909 | ||
77a121c3 JB |
2910 | /* process only for station */ |
2911 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2912 | return RX_DROP_MONITOR; | |
2913 | break; | |
2914 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2915 | /* process only for ibss and mesh */ |
2916 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2917 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2918 | return RX_DROP_MONITOR; |
2919 | break; | |
2920 | default: | |
2921 | return RX_DROP_MONITOR; | |
2922 | } | |
f9d540ee | 2923 | |
77a121c3 | 2924 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2925 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2926 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2927 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2928 | if (rx->sta) |
2929 | rx->sta->rx_packets++; | |
46900298 | 2930 | |
77a121c3 | 2931 | return RX_QUEUED; |
571ecf67 JB |
2932 | } |
2933 | ||
5cf121c3 | 2934 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2935 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2936 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2937 | { |
2938 | struct ieee80211_sub_if_data *sdata; | |
2939 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2940 | struct sk_buff *skb = rx->skb, *skb2; |
2941 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2942 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2943 | int needed_headroom; |
3d30d949 | 2944 | |
554891e6 JB |
2945 | /* |
2946 | * If cooked monitor has been processed already, then | |
2947 | * don't do it again. If not, set the flag. | |
2948 | */ | |
2949 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2950 | goto out_free_skb; |
554891e6 | 2951 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2952 | |
152c477a JB |
2953 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2954 | if (!local->cooked_mntrs) | |
2955 | goto out_free_skb; | |
2956 | ||
1f7bba79 JB |
2957 | /* vendor data is long removed here */ |
2958 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 2959 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 2960 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 2961 | |
293702a3 JB |
2962 | if (skb_headroom(skb) < needed_headroom && |
2963 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2964 | goto out_free_skb; | |
3d30d949 | 2965 | |
293702a3 | 2966 | /* prepend radiotap information */ |
973ef21a FF |
2967 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2968 | false); | |
3d30d949 MW |
2969 | |
2970 | skb_set_mac_header(skb, 0); | |
2971 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2972 | skb->pkt_type = PACKET_OTHERHOST; | |
2973 | skb->protocol = htons(ETH_P_802_2); | |
2974 | ||
2975 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2976 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2977 | continue; |
2978 | ||
05c914fe | 2979 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2980 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2981 | continue; | |
2982 | ||
2983 | if (prev_dev) { | |
2984 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2985 | if (skb2) { | |
2986 | skb2->dev = prev_dev; | |
5548a8a1 | 2987 | netif_receive_skb(skb2); |
3d30d949 MW |
2988 | } |
2989 | } | |
2990 | ||
2991 | prev_dev = sdata->dev; | |
2992 | sdata->dev->stats.rx_packets++; | |
2993 | sdata->dev->stats.rx_bytes += skb->len; | |
2994 | } | |
2995 | ||
2996 | if (prev_dev) { | |
2997 | skb->dev = prev_dev; | |
5548a8a1 | 2998 | netif_receive_skb(skb); |
554891e6 JB |
2999 | return; |
3000 | } | |
3d30d949 MW |
3001 | |
3002 | out_free_skb: | |
3003 | dev_kfree_skb(skb); | |
3004 | } | |
3005 | ||
aa0c8636 CL |
3006 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3007 | ieee80211_rx_result res) | |
3008 | { | |
3009 | switch (res) { | |
3010 | case RX_DROP_MONITOR: | |
3011 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3012 | if (rx->sta) | |
3013 | rx->sta->rx_dropped++; | |
3014 | /* fall through */ | |
3015 | case RX_CONTINUE: { | |
3016 | struct ieee80211_rate *rate = NULL; | |
3017 | struct ieee80211_supported_band *sband; | |
3018 | struct ieee80211_rx_status *status; | |
3019 | ||
3020 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3021 | ||
3022 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3023 | if (!(status->flag & RX_FLAG_HT) && |
3024 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3025 | rate = &sband->bitrates[status->rate_idx]; |
3026 | ||
3027 | ieee80211_rx_cooked_monitor(rx, rate); | |
3028 | break; | |
3029 | } | |
3030 | case RX_DROP_UNUSABLE: | |
3031 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3032 | if (rx->sta) | |
3033 | rx->sta->rx_dropped++; | |
3034 | dev_kfree_skb(rx->skb); | |
3035 | break; | |
3036 | case RX_QUEUED: | |
3037 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3038 | break; | |
3039 | } | |
3040 | } | |
571ecf67 | 3041 | |
f9e124fb CL |
3042 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3043 | struct sk_buff_head *frames) | |
58905290 | 3044 | { |
58905290 | 3045 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3046 | struct sk_buff *skb; |
8944b79f | 3047 | |
e32f85f7 LCC |
3048 | #define CALL_RXH(rxh) \ |
3049 | do { \ | |
3050 | res = rxh(rx); \ | |
3051 | if (res != RX_CONTINUE) \ | |
2569a826 | 3052 | goto rxh_next; \ |
e32f85f7 | 3053 | } while (0); |
49461622 | 3054 | |
f9e124fb | 3055 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3056 | |
f9e124fb | 3057 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3058 | /* |
3059 | * all the other fields are valid across frames | |
3060 | * that belong to an aMPDU since they are on the | |
3061 | * same TID from the same station | |
3062 | */ | |
3063 | rx->skb = skb; | |
3064 | ||
2569a826 | 3065 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3066 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3067 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3068 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3069 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3070 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3071 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3072 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3073 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3074 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3075 | #endif |
2154c81c | 3076 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3077 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3078 | |
3079 | /* special treatment -- needs the queue */ | |
3080 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3081 | if (res != RX_CONTINUE) | |
3082 | goto rxh_next; | |
3083 | ||
2e161f78 | 3084 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3085 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3086 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3087 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3088 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3089 | |
aa0c8636 CL |
3090 | rxh_next: |
3091 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3092 | |
49461622 | 3093 | #undef CALL_RXH |
aa0c8636 | 3094 | } |
24a8fdad | 3095 | |
f9e124fb | 3096 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3097 | } |
3098 | ||
4406c376 | 3099 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3100 | { |
f9e124fb | 3101 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3102 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3103 | ||
f9e124fb CL |
3104 | __skb_queue_head_init(&reorder_release); |
3105 | ||
aa0c8636 CL |
3106 | #define CALL_RXH(rxh) \ |
3107 | do { \ | |
3108 | res = rxh(rx); \ | |
3109 | if (res != RX_CONTINUE) \ | |
3110 | goto rxh_next; \ | |
3111 | } while (0); | |
3112 | ||
aa0c8636 CL |
3113 | CALL_RXH(ieee80211_rx_h_check) |
3114 | ||
f9e124fb | 3115 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3116 | |
f9e124fb | 3117 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3118 | return; |
49461622 | 3119 | |
2569a826 | 3120 | rxh_next: |
aa0c8636 CL |
3121 | ieee80211_rx_handlers_result(rx, res); |
3122 | ||
3123 | #undef CALL_RXH | |
58905290 JB |
3124 | } |
3125 | ||
2bff8ebf | 3126 | /* |
dd318575 JB |
3127 | * This function makes calls into the RX path, therefore |
3128 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3129 | */ |
3130 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3131 | { | |
f9e124fb | 3132 | struct sk_buff_head frames; |
554891e6 JB |
3133 | struct ieee80211_rx_data rx = { |
3134 | .sta = sta, | |
3135 | .sdata = sta->sdata, | |
3136 | .local = sta->local, | |
9e26297a JB |
3137 | /* This is OK -- must be QoS data frame */ |
3138 | .security_idx = tid, | |
3139 | .seqno_idx = tid, | |
fcf8bd3b | 3140 | .flags = 0, |
554891e6 | 3141 | }; |
2c15a0cf CL |
3142 | struct tid_ampdu_rx *tid_agg_rx; |
3143 | ||
3144 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3145 | if (!tid_agg_rx) | |
3146 | return; | |
2bff8ebf | 3147 | |
f9e124fb CL |
3148 | __skb_queue_head_init(&frames); |
3149 | ||
2c15a0cf | 3150 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3151 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3152 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3153 | |
f9e124fb | 3154 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3155 | } |
3156 | ||
571ecf67 JB |
3157 | /* main receive path */ |
3158 | ||
3c2723f5 JB |
3159 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3160 | struct ieee80211_hdr *hdr) | |
23a24def | 3161 | { |
20b01f80 | 3162 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3163 | struct sk_buff *skb = rx->skb; |
3164 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3165 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3166 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3167 | ||
51fb61e7 | 3168 | switch (sdata->vif.type) { |
05c914fe | 3169 | case NL80211_IFTYPE_STATION: |
9bc383de | 3170 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3171 | return false; |
77fdaa12 | 3172 | if (!multicast && |
b203ca39 | 3173 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3174 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3175 | sdata->u.mgd.use_4addr) | |
3c2723f5 | 3176 | return false; |
554891e6 | 3177 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3178 | } |
3179 | break; | |
05c914fe | 3180 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3181 | if (!bssid) |
3c2723f5 | 3182 | return false; |
6329b8d9 FF |
3183 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3184 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3185 | return false; |
a7767f95 | 3186 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3187 | return true; |
d48b2968 | 3188 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3189 | return false; |
23a24def | 3190 | } else if (!multicast && |
b203ca39 | 3191 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3192 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3193 | return false; |
554891e6 | 3194 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3195 | } else if (!rx->sta) { |
3196 | int rate_idx; | |
5614618e JB |
3197 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3198 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3199 | else |
eb9fb5b8 | 3200 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3201 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3202 | BIT(rate_idx)); | |
0fb8ca45 | 3203 | } |
23a24def | 3204 | break; |
239281f8 RL |
3205 | case NL80211_IFTYPE_OCB: |
3206 | if (!bssid) | |
3207 | return false; | |
3208 | if (ieee80211_is_beacon(hdr->frame_control)) { | |
3209 | return false; | |
3210 | } else if (!is_broadcast_ether_addr(bssid)) { | |
3211 | ocb_dbg(sdata, "BSSID mismatch in OCB mode!\n"); | |
3212 | return false; | |
3213 | } else if (!multicast && | |
3214 | !ether_addr_equal(sdata->dev->dev_addr, | |
3215 | hdr->addr1)) { | |
3216 | /* if we are in promisc mode we also accept | |
3217 | * packets not destined for us | |
3218 | */ | |
3219 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
3220 | return false; | |
3221 | rx->flags &= ~IEEE80211_RX_RA_MATCH; | |
3222 | } else if (!rx->sta) { | |
3223 | int rate_idx; | |
3224 | if (status->flag & RX_FLAG_HT) | |
3225 | rate_idx = 0; /* TODO: HT rates */ | |
3226 | else | |
3227 | rate_idx = status->rate_idx; | |
3228 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3229 | BIT(rate_idx)); | |
3230 | } | |
3231 | break; | |
05c914fe | 3232 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3233 | if (!multicast && |
b203ca39 | 3234 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 | 3235 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3236 | return false; |
6032f934 | 3237 | |
554891e6 | 3238 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3239 | } |
3240 | break; | |
05c914fe JB |
3241 | case NL80211_IFTYPE_AP_VLAN: |
3242 | case NL80211_IFTYPE_AP: | |
23a24def | 3243 | if (!bssid) { |
b203ca39 | 3244 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3245 | return false; |
f142c6b9 | 3246 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3247 | /* |
3248 | * Accept public action frames even when the | |
3249 | * BSSID doesn't match, this is used for P2P | |
3250 | * and location updates. Note that mac80211 | |
3251 | * itself never looks at these frames. | |
3252 | */ | |
2b9ccd4e JB |
3253 | if (!multicast && |
3254 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3255 | return false; |
d48b2968 | 3256 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3257 | return true; |
d48b2968 | 3258 | if (!ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3259 | return false; |
554891e6 | 3260 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
db8e1732 AN |
3261 | } else if (!ieee80211_has_tods(hdr->frame_control)) { |
3262 | /* ignore data frames to TDLS-peers */ | |
3263 | if (ieee80211_is_data(hdr->frame_control)) | |
3264 | return false; | |
3265 | /* ignore action frames to TDLS-peers */ | |
3266 | if (ieee80211_is_action(hdr->frame_control) && | |
3267 | !ether_addr_equal(bssid, hdr->addr1)) | |
3268 | return false; | |
23a24def | 3269 | } |
23a24def | 3270 | break; |
05c914fe | 3271 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3272 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3273 | return false; |
b203ca39 | 3274 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
3c2723f5 | 3275 | return false; |
23a24def | 3276 | break; |
f142c6b9 JB |
3277 | case NL80211_IFTYPE_P2P_DEVICE: |
3278 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3279 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3280 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3281 | !ieee80211_is_beacon(hdr->frame_control)) | |
3c2723f5 | 3282 | return false; |
1b737f88 JB |
3283 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3284 | !multicast) | |
f142c6b9 JB |
3285 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3286 | break; | |
2ca27bcf | 3287 | default: |
fb1c1cd6 | 3288 | /* should never get here */ |
f142c6b9 | 3289 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3290 | break; |
23a24def JB |
3291 | } |
3292 | ||
3c2723f5 | 3293 | return true; |
23a24def JB |
3294 | } |
3295 | ||
4406c376 JB |
3296 | /* |
3297 | * This function returns whether or not the SKB | |
3298 | * was destined for RX processing or not, which, | |
3299 | * if consume is true, is equivalent to whether | |
3300 | * or not the skb was consumed. | |
3301 | */ | |
3302 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3303 | struct sk_buff *skb, bool consume) | |
3304 | { | |
3305 | struct ieee80211_local *local = rx->local; | |
3306 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3307 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3308 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3309 | |
3310 | rx->skb = skb; | |
554891e6 | 3311 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3312 | |
40791942 | 3313 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3314 | return false; |
3315 | ||
4406c376 JB |
3316 | if (!consume) { |
3317 | skb = skb_copy(skb, GFP_ATOMIC); | |
3318 | if (!skb) { | |
3319 | if (net_ratelimit()) | |
3320 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3321 | "failed to copy skb for %s\n", |
4406c376 JB |
3322 | sdata->name); |
3323 | return true; | |
3324 | } | |
3325 | ||
3326 | rx->skb = skb; | |
3327 | } | |
3328 | ||
3329 | ieee80211_invoke_rx_handlers(rx); | |
3330 | return true; | |
3331 | } | |
3332 | ||
571ecf67 | 3333 | /* |
6b59db7d | 3334 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3335 | * be called with rcu_read_lock protection. |
571ecf67 | 3336 | */ |
71ebb4aa | 3337 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3338 | struct sk_buff *skb) |
571ecf67 JB |
3339 | { |
3340 | struct ieee80211_local *local = hw_to_local(hw); | |
3341 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3342 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3343 | __le16 fc; |
5cf121c3 | 3344 | struct ieee80211_rx_data rx; |
4406c376 | 3345 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3346 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3347 | int err = 0; |
571ecf67 | 3348 | |
e3cf8b3f | 3349 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3350 | memset(&rx, 0, sizeof(rx)); |
3351 | rx.skb = skb; | |
3352 | rx.local = local; | |
72abd81b | 3353 | |
e3cf8b3f | 3354 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3355 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3356 | |
4a4f1a58 JB |
3357 | if (ieee80211_is_mgmt(fc)) { |
3358 | /* drop frame if too short for header */ | |
3359 | if (skb->len < ieee80211_hdrlen(fc)) | |
3360 | err = -ENOBUFS; | |
3361 | else | |
3362 | err = skb_linearize(skb); | |
3363 | } else { | |
e3cf8b3f | 3364 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3365 | } |
e3cf8b3f ZY |
3366 | |
3367 | if (err) { | |
3368 | dev_kfree_skb(skb); | |
3369 | return; | |
3370 | } | |
3371 | ||
3372 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3373 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3374 | ieee80211_verify_alignment(&rx); |
38f3714d | 3375 | |
d48b2968 JB |
3376 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3377 | ieee80211_is_beacon(hdr->frame_control))) | |
3378 | ieee80211_scan_rx(local, skb); | |
3379 | ||
e3cf8b3f | 3380 | if (ieee80211_is_data(fc)) { |
56af3268 | 3381 | prev_sta = NULL; |
4406c376 | 3382 | |
7852e361 | 3383 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3384 | if (!prev_sta) { |
3385 | prev_sta = sta; | |
3386 | continue; | |
3387 | } | |
3388 | ||
3389 | rx.sta = prev_sta; | |
3390 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3391 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3392 | |
56af3268 | 3393 | prev_sta = sta; |
4406c376 | 3394 | } |
56af3268 BG |
3395 | |
3396 | if (prev_sta) { | |
3397 | rx.sta = prev_sta; | |
3398 | rx.sdata = prev_sta->sdata; | |
3399 | ||
4406c376 | 3400 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3401 | return; |
8e26d5ad | 3402 | goto out; |
56af3268 | 3403 | } |
4406c376 JB |
3404 | } |
3405 | ||
4b0dd98e | 3406 | prev = NULL; |
b2e7771e | 3407 | |
4b0dd98e JB |
3408 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3409 | if (!ieee80211_sdata_running(sdata)) | |
3410 | continue; | |
340e11f3 | 3411 | |
4b0dd98e JB |
3412 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3413 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3414 | continue; | |
340e11f3 | 3415 | |
4b0dd98e JB |
3416 | /* |
3417 | * frame is destined for this interface, but if it's | |
3418 | * not also for the previous one we handle that after | |
3419 | * the loop to avoid copying the SKB once too much | |
3420 | */ | |
4bb29f8c | 3421 | |
4b0dd98e | 3422 | if (!prev) { |
abe60632 | 3423 | prev = sdata; |
4b0dd98e | 3424 | continue; |
340e11f3 | 3425 | } |
4bb29f8c | 3426 | |
7852e361 | 3427 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3428 | rx.sdata = prev; |
3429 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3430 | |
4b0dd98e JB |
3431 | prev = sdata; |
3432 | } | |
3433 | ||
3434 | if (prev) { | |
7852e361 | 3435 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3436 | rx.sdata = prev; |
4406c376 | 3437 | |
4b0dd98e JB |
3438 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3439 | return; | |
571ecf67 | 3440 | } |
4406c376 | 3441 | |
8e26d5ad | 3442 | out: |
4406c376 | 3443 | dev_kfree_skb(skb); |
571ecf67 | 3444 | } |
6368e4b1 RR |
3445 | |
3446 | /* | |
3447 | * This is the receive path handler. It is called by a low level driver when an | |
3448 | * 802.11 MPDU is received from the hardware. | |
3449 | */ | |
103bf9f7 | 3450 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3451 | { |
3452 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3453 | struct ieee80211_rate *rate = NULL; |
3454 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3455 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3456 | |
d20ef63d JB |
3457 | WARN_ON_ONCE(softirq_count() == 0); |
3458 | ||
444e3803 | 3459 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3460 | goto drop; |
8318d78a JB |
3461 | |
3462 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3463 | if (WARN_ON(!sband)) |
3464 | goto drop; | |
8318d78a | 3465 | |
89c3a8ac JB |
3466 | /* |
3467 | * If we're suspending, it is possible although not too likely | |
3468 | * that we'd be receiving frames after having already partially | |
3469 | * quiesced the stack. We can't process such frames then since | |
3470 | * that might, for example, cause stations to be added or other | |
3471 | * driver callbacks be invoked. | |
3472 | */ | |
77a980dc JB |
3473 | if (unlikely(local->quiescing || local->suspended)) |
3474 | goto drop; | |
89c3a8ac | 3475 | |
04800ada AN |
3476 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3477 | if (unlikely(local->in_reconfig)) | |
3478 | goto drop; | |
3479 | ||
ea77f12f JB |
3480 | /* |
3481 | * The same happens when we're not even started, | |
3482 | * but that's worth a warning. | |
3483 | */ | |
77a980dc JB |
3484 | if (WARN_ON(!local->started)) |
3485 | goto drop; | |
ea77f12f | 3486 | |
fc885189 | 3487 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3488 | /* |
fc885189 JB |
3489 | * Validate the rate, unless a PLCP error means that |
3490 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3491 | */ |
fc885189 JB |
3492 | |
3493 | if (status->flag & RX_FLAG_HT) { | |
3494 | /* | |
3495 | * rate_idx is MCS index, which can be [0-76] | |
3496 | * as documented on: | |
3497 | * | |
3498 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3499 | * | |
3500 | * Anything else would be some sort of driver or | |
3501 | * hardware error. The driver should catch hardware | |
3502 | * errors. | |
3503 | */ | |
444e3803 | 3504 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3505 | "Rate marked as an HT rate but passed " |
3506 | "status->rate_idx is not " | |
3507 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3508 | status->rate_idx, | |
3509 | status->rate_idx)) | |
3510 | goto drop; | |
5614618e JB |
3511 | } else if (status->flag & RX_FLAG_VHT) { |
3512 | if (WARN_ONCE(status->rate_idx > 9 || | |
3513 | !status->vht_nss || | |
3514 | status->vht_nss > 8, | |
3515 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3516 | status->rate_idx, status->vht_nss)) | |
3517 | goto drop; | |
fc885189 | 3518 | } else { |
444e3803 | 3519 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3520 | goto drop; |
3521 | rate = &sband->bitrates[status->rate_idx]; | |
3522 | } | |
0fb8ca45 | 3523 | } |
6368e4b1 | 3524 | |
554891e6 JB |
3525 | status->rx_flags = 0; |
3526 | ||
6368e4b1 RR |
3527 | /* |
3528 | * key references and virtual interfaces are protected using RCU | |
3529 | * and this requires that we are in a read-side RCU section during | |
3530 | * receive processing | |
3531 | */ | |
3532 | rcu_read_lock(); | |
3533 | ||
3534 | /* | |
3535 | * Frames with failed FCS/PLCP checksum are not returned, | |
3536 | * all other frames are returned without radiotap header | |
3537 | * if it was previously present. | |
3538 | * Also, frames with less than 16 bytes are dropped. | |
3539 | */ | |
f1d58c25 | 3540 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3541 | if (!skb) { |
3542 | rcu_read_unlock(); | |
3543 | return; | |
3544 | } | |
3545 | ||
e1e54068 JB |
3546 | ieee80211_tpt_led_trig_rx(local, |
3547 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3548 | skb->len); | |
071d9ac2 | 3549 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3550 | |
3551 | rcu_read_unlock(); | |
77a980dc JB |
3552 | |
3553 | return; | |
3554 | drop: | |
3555 | kfree_skb(skb); | |
6368e4b1 | 3556 | } |
103bf9f7 | 3557 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3558 | |
3559 | /* This is a version of the rx handler that can be called from hard irq | |
3560 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3561 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3562 | { |
3563 | struct ieee80211_local *local = hw_to_local(hw); | |
3564 | ||
3565 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3566 | ||
571ecf67 JB |
3567 | skb->pkt_type = IEEE80211_RX_MSG; |
3568 | skb_queue_tail(&local->skb_queue, skb); | |
3569 | tasklet_schedule(&local->tasklet); | |
3570 | } | |
3571 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |