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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) |
3a5c5e81 | 275 | channel_flags |= IEEE80211_CHAN_CCK | 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); | |
51648921 JB |
364 | put_unaligned_le16(known, pos); |
365 | pos += 2; | |
366 | /* flags */ | |
367 | if (status->flag & RX_FLAG_SHORT_GI) | |
368 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
369 | /* in VHT, STBC is binary */ |
370 | if (status->flag & RX_FLAG_STBC_MASK) | |
371 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
372 | if (status->vht_flag & RX_VHT_FLAG_BF) |
373 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
374 | pos++; |
375 | /* bandwidth */ | |
1b8d242a | 376 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 377 | *pos++ = 4; |
1b8d242a | 378 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
379 | *pos++ = 11; |
380 | else if (status->flag & RX_FLAG_40MHZ) | |
381 | *pos++ = 1; | |
382 | else /* 20 MHz */ | |
383 | *pos++ = 0; | |
384 | /* MCS/NSS */ | |
385 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
386 | pos += 4; | |
387 | /* coding field */ | |
63c361f5 EG |
388 | if (status->flag & RX_FLAG_LDPC) |
389 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
390 | pos++; |
391 | /* group ID */ | |
392 | pos++; | |
393 | /* partial_aid */ | |
394 | pos += 2; | |
395 | } | |
396 | ||
a144f378 JB |
397 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
398 | *pos++ = status->chain_signal[chain]; | |
399 | *pos++ = chain; | |
400 | } | |
1f7bba79 JB |
401 | |
402 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
403 | /* ensure 2 byte alignment for the vendor field as required */ | |
404 | if ((pos - (u8 *)rthdr) & 1) | |
405 | *pos++ = 0; | |
406 | *pos++ = rtap.oui[0]; | |
407 | *pos++ = rtap.oui[1]; | |
408 | *pos++ = rtap.oui[2]; | |
409 | *pos++ = rtap.subns; | |
410 | put_unaligned_le16(rtap.len, pos); | |
411 | pos += 2; | |
412 | /* align the actual payload as requested */ | |
413 | while ((pos - (u8 *)rthdr) & (rtap.align - 1)) | |
414 | *pos++ = 0; | |
415 | /* data (and possible padding) already follows */ | |
416 | } | |
601ae7f2 BR |
417 | } |
418 | ||
b2e7771e JB |
419 | /* |
420 | * This function copies a received frame to all monitor interfaces and | |
421 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
422 | * radiotap header the driver might have added. | |
423 | */ | |
424 | static struct sk_buff * | |
425 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 426 | struct ieee80211_rate *rate) |
b2e7771e | 427 | { |
f1d58c25 | 428 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 429 | struct ieee80211_sub_if_data *sdata; |
1f7bba79 | 430 | int rt_hdrlen, needed_headroom; |
b2e7771e JB |
431 | struct sk_buff *skb, *skb2; |
432 | struct net_device *prev_dev = NULL; | |
433 | int present_fcs_len = 0; | |
1f7bba79 JB |
434 | unsigned int rtap_vendor_space = 0; |
435 | ||
436 | if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) { | |
437 | struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data; | |
438 | ||
439 | rtap_vendor_space = sizeof(*rtap) + rtap->len + rtap->pad; | |
440 | } | |
b2e7771e JB |
441 | |
442 | /* | |
443 | * First, we may need to make a copy of the skb because | |
444 | * (1) we need to modify it for radiotap (if not present), and | |
445 | * (2) the other RX handlers will modify the skb we got. | |
446 | * | |
447 | * We don't need to, of course, if we aren't going to return | |
448 | * the SKB because it has a bad FCS/PLCP checksum. | |
449 | */ | |
0869aea0 | 450 | |
b2e7771e JB |
451 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
452 | present_fcs_len = FCS_LEN; | |
453 | ||
1f7bba79 JB |
454 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
455 | if (!pskb_may_pull(origskb, 2 + rtap_vendor_space)) { | |
e3cf8b3f ZY |
456 | dev_kfree_skb(origskb); |
457 | return NULL; | |
458 | } | |
459 | ||
b2e7771e | 460 | if (!local->monitors) { |
1f7bba79 JB |
461 | if (should_drop_frame(origskb, present_fcs_len, |
462 | rtap_vendor_space)) { | |
b2e7771e JB |
463 | dev_kfree_skb(origskb); |
464 | return NULL; | |
465 | } | |
466 | ||
1f7bba79 | 467 | return remove_monitor_info(local, origskb, rtap_vendor_space); |
b2e7771e JB |
468 | } |
469 | ||
751413ea | 470 | /* room for the radiotap header based on driver features */ |
1f7bba79 JB |
471 | rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, origskb); |
472 | needed_headroom = rt_hdrlen - rtap_vendor_space; | |
751413ea | 473 | |
1f7bba79 | 474 | if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { |
b2e7771e JB |
475 | /* only need to expand headroom if necessary */ |
476 | skb = origskb; | |
477 | origskb = NULL; | |
478 | ||
479 | /* | |
480 | * This shouldn't trigger often because most devices have an | |
481 | * RX header they pull before we get here, and that should | |
482 | * be big enough for our radiotap information. We should | |
483 | * probably export the length to drivers so that we can have | |
484 | * them allocate enough headroom to start with. | |
485 | */ | |
486 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 487 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
488 | dev_kfree_skb(skb); |
489 | return NULL; | |
490 | } | |
491 | } else { | |
492 | /* | |
493 | * Need to make a copy and possibly remove radiotap header | |
494 | * and FCS from the original. | |
495 | */ | |
496 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
497 | ||
1f7bba79 JB |
498 | origskb = remove_monitor_info(local, origskb, |
499 | rtap_vendor_space); | |
b2e7771e JB |
500 | |
501 | if (!skb) | |
502 | return origskb; | |
503 | } | |
504 | ||
0869aea0 | 505 | /* prepend radiotap information */ |
1f7bba79 | 506 | ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true); |
b2e7771e | 507 | |
ce3edf6d | 508 | skb_reset_mac_header(skb); |
b2e7771e JB |
509 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
510 | skb->pkt_type = PACKET_OTHERHOST; | |
511 | skb->protocol = htons(ETH_P_802_2); | |
512 | ||
513 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 514 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
515 | continue; |
516 | ||
3d30d949 MW |
517 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
518 | continue; | |
519 | ||
9607e6b6 | 520 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
521 | continue; |
522 | ||
b2e7771e JB |
523 | if (prev_dev) { |
524 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
525 | if (skb2) { | |
526 | skb2->dev = prev_dev; | |
5548a8a1 | 527 | netif_receive_skb(skb2); |
b2e7771e JB |
528 | } |
529 | } | |
530 | ||
531 | prev_dev = sdata->dev; | |
532 | sdata->dev->stats.rx_packets++; | |
533 | sdata->dev->stats.rx_bytes += skb->len; | |
534 | } | |
535 | ||
536 | if (prev_dev) { | |
537 | skb->dev = prev_dev; | |
5548a8a1 | 538 | netif_receive_skb(skb); |
b2e7771e JB |
539 | } else |
540 | dev_kfree_skb(skb); | |
541 | ||
542 | return origskb; | |
543 | } | |
544 | ||
5cf121c3 | 545 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 546 | { |
238f74a2 | 547 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 548 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 549 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
550 | |
551 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
552 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
553 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 554 | /* frame has qos control */ |
238f74a2 | 555 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 556 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 557 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
558 | |
559 | seqno_idx = tid; | |
560 | security_idx = tid; | |
6e0d114d | 561 | } else { |
1411f9b5 JB |
562 | /* |
563 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
564 | * | |
565 | * Sequence numbers for management frames, QoS data | |
566 | * frames with a broadcast/multicast address in the | |
567 | * Address 1 field, and all non-QoS data frames sent | |
568 | * by QoS STAs are assigned using an additional single | |
569 | * modulo-4096 counter, [...] | |
570 | * | |
571 | * We also use that counter for non-QoS STAs. | |
572 | */ | |
5a306f58 | 573 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
574 | security_idx = 0; |
575 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 576 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 577 | tid = 0; |
6e0d114d | 578 | } |
52865dfd | 579 | |
9e26297a JB |
580 | rx->seqno_idx = seqno_idx; |
581 | rx->security_idx = security_idx; | |
6e0d114d JB |
582 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
583 | * For now, set skb->priority to 0 for other cases. */ | |
584 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 585 | } |
6e0d114d | 586 | |
d1c3a37c JB |
587 | /** |
588 | * DOC: Packet alignment | |
589 | * | |
590 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
591 | * to the stack. | |
592 | * | |
593 | * Additionally, should, if possible, align the payload data in a way that | |
594 | * guarantees that the contained IP header is aligned to a four-byte | |
595 | * boundary. In the case of regular frames, this simply means aligning the | |
596 | * payload to a four-byte boundary (because either the IP header is directly | |
597 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
598 | * in front of it). If the payload data is not properly aligned and the |
599 | * architecture doesn't support efficient unaligned operations, mac80211 | |
600 | * will align the data. | |
d1c3a37c JB |
601 | * |
602 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
603 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
604 | * push the IP header further back to a multiple of four again. Thankfully, the | |
605 | * specs were sane enough this time around to require padding each A-MSDU | |
606 | * subframe to a length that is a multiple of four. | |
607 | * | |
25985edc | 608 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
609 | * the payload is not supported, the driver is required to move the 802.11 |
610 | * header to be directly in front of the payload in that case. | |
611 | */ | |
612 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 613 | { |
59d9cb07 KV |
614 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
615 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
616 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 617 | #endif |
6e0d114d JB |
618 | } |
619 | ||
6368e4b1 | 620 | |
571ecf67 JB |
621 | /* rx handlers */ |
622 | ||
3cfcf6ac JM |
623 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
624 | { | |
625 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
626 | ||
d8ca16db | 627 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
628 | return 0; |
629 | ||
d8ca16db | 630 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
631 | } |
632 | ||
633 | ||
634 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
635 | { | |
636 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
637 | ||
d8ca16db | 638 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
639 | return 0; |
640 | ||
d8ca16db | 641 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
642 | } |
643 | ||
644 | ||
645 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
646 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
647 | { | |
648 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
649 | struct ieee80211_mmie *mmie; | |
56c52da2 | 650 | struct ieee80211_mmie_16 *mmie16; |
3cfcf6ac | 651 | |
1df332e8 | 652 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
653 | return -1; |
654 | ||
d8ca16db | 655 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
656 | return -1; /* not a robust management frame */ |
657 | ||
658 | mmie = (struct ieee80211_mmie *) | |
659 | (skb->data + skb->len - sizeof(*mmie)); | |
56c52da2 JM |
660 | if (mmie->element_id == WLAN_EID_MMIE && |
661 | mmie->length == sizeof(*mmie) - 2) | |
662 | return le16_to_cpu(mmie->key_id); | |
663 | ||
664 | mmie16 = (struct ieee80211_mmie_16 *) | |
665 | (skb->data + skb->len - sizeof(*mmie16)); | |
666 | if (skb->len >= 24 + sizeof(*mmie16) && | |
667 | mmie16->element_id == WLAN_EID_MMIE && | |
668 | mmie16->length == sizeof(*mmie16) - 2) | |
669 | return le16_to_cpu(mmie16->key_id); | |
670 | ||
671 | return -1; | |
3cfcf6ac JM |
672 | } |
673 | ||
2475b1cc MS |
674 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
675 | struct sk_buff *skb) | |
676 | { | |
677 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
678 | __le16 fc; | |
679 | int hdrlen; | |
680 | u8 keyid; | |
681 | ||
682 | fc = hdr->frame_control; | |
683 | hdrlen = ieee80211_hdrlen(fc); | |
684 | ||
685 | if (skb->len < hdrlen + cs->hdr_len) | |
686 | return -EINVAL; | |
687 | ||
688 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
689 | keyid &= cs->key_idx_mask; | |
690 | keyid >>= cs->key_idx_shift; | |
691 | ||
692 | return keyid; | |
693 | } | |
694 | ||
1df332e8 | 695 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 696 | { |
a7767f95 | 697 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 698 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 699 | |
a7767f95 | 700 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
701 | if (is_multicast_ether_addr(hdr->addr1)) { |
702 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 703 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 704 | return RX_DROP_MONITOR; |
b203ca39 | 705 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
706 | return RX_DROP_MONITOR; |
707 | } else { | |
708 | if (!ieee80211_has_a4(hdr->frame_control)) | |
709 | return RX_DROP_MONITOR; | |
b203ca39 | 710 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
711 | return RX_DROP_MONITOR; |
712 | } | |
33b64eb2 LCC |
713 | } |
714 | ||
715 | /* If there is not an established peer link and this is not a peer link | |
716 | * establisment frame, beacon or probe, drop the frame. | |
717 | */ | |
718 | ||
57cf8043 | 719 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 720 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 721 | |
a7767f95 | 722 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
723 | return RX_DROP_MONITOR; |
724 | ||
a7767f95 | 725 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 726 | u8 category; |
9b395bc3 JB |
727 | |
728 | /* make sure category field is present */ | |
729 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
730 | return RX_DROP_MONITOR; | |
731 | ||
33b64eb2 | 732 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
733 | category = mgmt->u.action.category; |
734 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 735 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 736 | return RX_DROP_MONITOR; |
33b64eb2 | 737 | return RX_CONTINUE; |
33b64eb2 LCC |
738 | } |
739 | ||
a7767f95 HH |
740 | if (ieee80211_is_probe_req(hdr->frame_control) || |
741 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
742 | ieee80211_is_beacon(hdr->frame_control) || |
743 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
744 | return RX_CONTINUE; |
745 | ||
746 | return RX_DROP_MONITOR; | |
a7767f95 HH |
747 | } |
748 | ||
902acc78 JB |
749 | return RX_CONTINUE; |
750 | } | |
33b64eb2 | 751 | |
d3b2fb53 | 752 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 753 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
754 | int index, |
755 | struct sk_buff_head *frames) | |
1edfb1af | 756 | { |
83eb935e MK |
757 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
758 | struct sk_buff *skb; | |
4cfda47b | 759 | struct ieee80211_rx_status *status; |
1edfb1af | 760 | |
dd318575 JB |
761 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
762 | ||
83eb935e | 763 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
764 | goto no_frame; |
765 | ||
83eb935e MK |
766 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
767 | __skb_queue_purge(skb_list); | |
768 | goto no_frame; | |
769 | } | |
770 | ||
771 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 772 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
773 | while ((skb = __skb_dequeue(skb_list))) { |
774 | status = IEEE80211_SKB_RXCB(skb); | |
775 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
776 | __skb_queue_tail(frames, skb); | |
777 | } | |
1edfb1af JB |
778 | |
779 | no_frame: | |
9a886586 | 780 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
781 | } |
782 | ||
d3b2fb53 | 783 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 784 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
785 | u16 head_seq_num, |
786 | struct sk_buff_head *frames) | |
1edfb1af JB |
787 | { |
788 | int index; | |
789 | ||
dd318575 JB |
790 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
791 | ||
9a886586 | 792 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 793 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
794 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
795 | frames); | |
1edfb1af JB |
796 | } |
797 | } | |
798 | ||
799 | /* | |
800 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
801 | * the skb was added to the buffer longer than this time ago, the earlier | |
802 | * frames that have not yet been received are assumed to be lost and the skb | |
803 | * can be released for processing. This may also release other skb's from the | |
804 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
805 | * |
806 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
807 | */ |
808 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
809 | ||
d3b2fb53 | 810 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
811 | struct tid_ampdu_rx *tid_agg_rx, |
812 | struct sk_buff_head *frames) | |
aa0c8636 | 813 | { |
83eb935e | 814 | int index, i, j; |
aa0c8636 | 815 | |
dd318575 JB |
816 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
817 | ||
aa0c8636 | 818 | /* release the buffer until next missing frame */ |
2e3049b7 | 819 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 820 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 821 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
822 | /* |
823 | * No buffers ready to be released, but check whether any | |
824 | * frames in the reorder buffer have timed out. | |
825 | */ | |
aa0c8636 CL |
826 | int skipped = 1; |
827 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
828 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
829 | if (!ieee80211_rx_reorder_ready( |
830 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
831 | skipped++; |
832 | continue; | |
833 | } | |
499fe9a4 DH |
834 | if (skipped && |
835 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 836 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 837 | goto set_release_timer; |
aa0c8636 | 838 | |
83eb935e MK |
839 | /* don't leave incomplete A-MSDUs around */ |
840 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
841 | i = (i + 1) % tid_agg_rx->buf_size) | |
842 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
843 | ||
bdcbd8e0 JB |
844 | ht_dbg_ratelimited(sdata, |
845 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
846 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
847 | frames); | |
aa0c8636 CL |
848 | |
849 | /* | |
850 | * Increment the head seq# also for the skipped slots. | |
851 | */ | |
852 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
853 | (tid_agg_rx->head_seq_num + |
854 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
855 | skipped = 0; |
856 | } | |
83eb935e MK |
857 | } else while (ieee80211_rx_reorder_ready( |
858 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
859 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
860 | frames); | |
2e3049b7 | 861 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 862 | } |
2bff8ebf CL |
863 | |
864 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 865 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
866 | |
867 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
868 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
869 | if (ieee80211_rx_reorder_ready( |
870 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
871 | break; |
872 | } | |
873 | ||
874 | set_release_timer: | |
875 | ||
788211d8 JB |
876 | if (!tid_agg_rx->removed) |
877 | mod_timer(&tid_agg_rx->reorder_timer, | |
878 | tid_agg_rx->reorder_time[j] + 1 + | |
879 | HT_RX_REORDER_BUF_TIMEOUT); | |
2bff8ebf CL |
880 | } else { |
881 | del_timer(&tid_agg_rx->reorder_timer); | |
882 | } | |
aa0c8636 CL |
883 | } |
884 | ||
1edfb1af JB |
885 | /* |
886 | * As this function belongs to the RX path it must be under | |
887 | * rcu_read_lock protection. It returns false if the frame | |
888 | * can be processed immediately, true if it was consumed. | |
889 | */ | |
d3b2fb53 | 890 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 891 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
892 | struct sk_buff *skb, |
893 | struct sk_buff_head *frames) | |
1edfb1af JB |
894 | { |
895 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 896 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
897 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
898 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
899 | u16 head_seq_num, buf_size; | |
900 | int index; | |
2bff8ebf | 901 | bool ret = true; |
1edfb1af | 902 | |
dd318575 JB |
903 | spin_lock(&tid_agg_rx->reorder_lock); |
904 | ||
4549cf2b MK |
905 | /* |
906 | * Offloaded BA sessions have no known starting sequence number so pick | |
907 | * one from first Rxed frame for this tid after BA was started. | |
908 | */ | |
909 | if (unlikely(tid_agg_rx->auto_seq)) { | |
910 | tid_agg_rx->auto_seq = false; | |
911 | tid_agg_rx->ssn = mpdu_seq_num; | |
912 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
913 | } | |
914 | ||
1edfb1af JB |
915 | buf_size = tid_agg_rx->buf_size; |
916 | head_seq_num = tid_agg_rx->head_seq_num; | |
917 | ||
918 | /* frame with out of date sequence number */ | |
9a886586 | 919 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 920 | dev_kfree_skb(skb); |
2bff8ebf | 921 | goto out; |
1edfb1af JB |
922 | } |
923 | ||
924 | /* | |
925 | * If frame the sequence number exceeds our buffering window | |
926 | * size release some previous frames to make room for this one. | |
927 | */ | |
9a886586 JB |
928 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
929 | head_seq_num = ieee80211_sn_inc( | |
930 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 931 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 932 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 933 | head_seq_num, frames); |
1edfb1af JB |
934 | } |
935 | ||
936 | /* Now the new frame is always in the range of the reordering buffer */ | |
937 | ||
2e3049b7 | 938 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
939 | |
940 | /* check if we already stored this frame */ | |
83eb935e | 941 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 942 | dev_kfree_skb(skb); |
2bff8ebf | 943 | goto out; |
1edfb1af JB |
944 | } |
945 | ||
946 | /* | |
947 | * If the current MPDU is in the right order and nothing else | |
948 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
949 | * If it is first but there's something stored, we may be able |
950 | * to release frames after this one. | |
1edfb1af JB |
951 | */ |
952 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
953 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
954 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
955 | tid_agg_rx->head_seq_num = | |
956 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
957 | ret = false; |
958 | goto out; | |
1edfb1af JB |
959 | } |
960 | ||
961 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
962 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
963 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
964 | tid_agg_rx->reorder_time[index] = jiffies; | |
965 | tid_agg_rx->stored_mpdu_num++; | |
966 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
967 | } | |
1edfb1af | 968 | |
2bff8ebf CL |
969 | out: |
970 | spin_unlock(&tid_agg_rx->reorder_lock); | |
971 | return ret; | |
1edfb1af JB |
972 | } |
973 | ||
974 | /* | |
975 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
976 | * true if the MPDU was buffered, false if it should be processed. | |
977 | */ | |
f9e124fb CL |
978 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
979 | struct sk_buff_head *frames) | |
1edfb1af | 980 | { |
2569a826 JB |
981 | struct sk_buff *skb = rx->skb; |
982 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 983 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
2569a826 | 984 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
985 | struct tid_ampdu_rx *tid_agg_rx; |
986 | u16 sc; | |
6cc00d54 | 987 | u8 tid, ack_policy; |
1edfb1af | 988 | |
051a41fa JB |
989 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
990 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 991 | goto dont_reorder; |
1edfb1af JB |
992 | |
993 | /* | |
994 | * filter the QoS data rx stream according to | |
995 | * STA/TID and check if this STA/TID is on aggregation | |
996 | */ | |
997 | ||
1edfb1af | 998 | if (!sta) |
2569a826 | 999 | goto dont_reorder; |
1edfb1af | 1000 | |
6cc00d54 TP |
1001 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
1002 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
1003 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
1004 | ||
a87f736d JB |
1005 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
1006 | if (!tid_agg_rx) | |
1007 | goto dont_reorder; | |
1edfb1af JB |
1008 | |
1009 | /* qos null data frames are excluded */ | |
1010 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1011 | goto dont_reorder; |
1edfb1af | 1012 | |
6cc00d54 TP |
1013 | /* not part of a BA session */ |
1014 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1015 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1016 | goto dont_reorder; | |
1017 | ||
1edfb1af JB |
1018 | /* new, potentially un-ordered, ampdu frame - process it */ |
1019 | ||
1020 | /* reset session timer */ | |
1021 | if (tid_agg_rx->timeout) | |
12d3952f | 1022 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1023 | |
1024 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1025 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1026 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1027 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1028 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1029 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1030 | return; |
1edfb1af JB |
1031 | } |
1032 | ||
a87f736d JB |
1033 | /* |
1034 | * No locking needed -- we will only ever process one | |
1035 | * RX packet at a time, and thus own tid_agg_rx. All | |
1036 | * other code manipulating it needs to (and does) make | |
1037 | * sure that we cannot get to it any more before doing | |
1038 | * anything with it. | |
1039 | */ | |
f9e124fb CL |
1040 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1041 | frames)) | |
2569a826 JB |
1042 | return; |
1043 | ||
1044 | dont_reorder: | |
f9e124fb | 1045 | __skb_queue_tail(frames, skb); |
1edfb1af | 1046 | } |
33b64eb2 | 1047 | |
49461622 | 1048 | static ieee80211_rx_result debug_noinline |
0395442a | 1049 | ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) |
571ecf67 | 1050 | { |
a7767f95 | 1051 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1052 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1053 | |
6b0f3274 JB |
1054 | /* |
1055 | * Drop duplicate 802.11 retransmissions | |
1056 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1057 | */ | |
0395442a JB |
1058 | |
1059 | if (rx->skb->len < 24) | |
1060 | return RX_CONTINUE; | |
1061 | ||
1062 | if (ieee80211_is_ctl(hdr->frame_control) || | |
1063 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
1064 | is_multicast_ether_addr(hdr->addr1)) | |
1065 | return RX_CONTINUE; | |
1066 | ||
1067 | if (rx->sta) { | |
a7767f95 | 1068 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1069 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1070 | hdr->seq_ctrl)) { |
5c90067c JB |
1071 | rx->local->dot11FrameDuplicateCount++; |
1072 | rx->sta->num_duplicates++; | |
b1f93314 | 1073 | return RX_DROP_UNUSABLE; |
0cfcefef | 1074 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1075 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1076 | } |
571ecf67 JB |
1077 | } |
1078 | ||
0395442a JB |
1079 | return RX_CONTINUE; |
1080 | } | |
1081 | ||
1082 | static ieee80211_rx_result debug_noinline | |
1083 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) | |
1084 | { | |
1085 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
1086 | ||
571ecf67 JB |
1087 | if (unlikely(rx->skb->len < 16)) { |
1088 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 1089 | return RX_DROP_MONITOR; |
571ecf67 JB |
1090 | } |
1091 | ||
571ecf67 JB |
1092 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1093 | * IEEE 802.11, Chap 5.5. | |
1094 | * | |
ccd7b362 JB |
1095 | * mac80211 filters only based on association state, i.e. it drops |
1096 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1097 | * deauth/disassoc frames when needed. In addition, hostapd is |
1098 | * responsible for filtering on both auth and assoc states. | |
1099 | */ | |
33b64eb2 | 1100 | |
902acc78 | 1101 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1102 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1103 | |
a7767f95 HH |
1104 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1105 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1106 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1107 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1108 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1109 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1110 | /* |
1111 | * accept port control frames from the AP even when it's not | |
1112 | * yet marked ASSOC to prevent a race where we don't set the | |
1113 | * assoc bit quickly enough before it sends the first frame | |
1114 | */ | |
1115 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1116 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1117 | unsigned int hdrlen; |
1118 | __be16 ethertype; | |
1119 | ||
1120 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1121 | ||
1122 | if (rx->skb->len < hdrlen + 8) | |
1123 | return RX_DROP_MONITOR; | |
1124 | ||
1125 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1126 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1127 | return RX_CONTINUE; |
1128 | } | |
21fc7560 JB |
1129 | |
1130 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1131 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1132 | hdr->addr2, | |
1133 | GFP_ATOMIC)) | |
1134 | return RX_DROP_UNUSABLE; | |
1135 | ||
e4c26add | 1136 | return RX_DROP_MONITOR; |
2a33bee2 | 1137 | } |
571ecf67 | 1138 | |
9ae54c84 | 1139 | return RX_CONTINUE; |
570bd537 JB |
1140 | } |
1141 | ||
1142 | ||
572e0012 KV |
1143 | static ieee80211_rx_result debug_noinline |
1144 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1145 | { | |
1146 | struct ieee80211_local *local; | |
1147 | struct ieee80211_hdr *hdr; | |
1148 | struct sk_buff *skb; | |
1149 | ||
1150 | local = rx->local; | |
1151 | skb = rx->skb; | |
1152 | hdr = (struct ieee80211_hdr *) skb->data; | |
1153 | ||
1154 | if (!local->pspolling) | |
1155 | return RX_CONTINUE; | |
1156 | ||
1157 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1158 | /* this is not from AP */ | |
1159 | return RX_CONTINUE; | |
1160 | ||
1161 | if (!ieee80211_is_data(hdr->frame_control)) | |
1162 | return RX_CONTINUE; | |
1163 | ||
1164 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1165 | /* AP has no more frames buffered for us */ | |
1166 | local->pspolling = false; | |
1167 | return RX_CONTINUE; | |
1168 | } | |
1169 | ||
1170 | /* more data bit is set, let's request a new frame from the AP */ | |
1171 | ieee80211_send_pspoll(local, rx->sdata); | |
1172 | ||
1173 | return RX_CONTINUE; | |
1174 | } | |
1175 | ||
d012a605 | 1176 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1177 | { |
133b8226 | 1178 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1179 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1180 | struct ps_data *ps; |
ba8c3d6f | 1181 | int tid; |
0795af57 | 1182 | |
d012a605 MP |
1183 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1184 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1185 | ps = &sdata->bss->ps; | |
1186 | else | |
1187 | return; | |
1188 | ||
1189 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1190 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1191 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1192 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1193 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1194 | sta->sta.addr, sta->sta.aid); | |
ba8c3d6f | 1195 | |
17c18bf8 JB |
1196 | ieee80211_clear_fast_xmit(sta); |
1197 | ||
ba8c3d6f FF |
1198 | if (!sta->sta.txq[0]) |
1199 | return; | |
1200 | ||
1201 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
1202 | struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); | |
1203 | ||
1204 | if (!skb_queue_len(&txqi->queue)) | |
1205 | set_bit(tid, &sta->txq_buffered_tids); | |
1206 | else | |
1207 | clear_bit(tid, &sta->txq_buffered_tids); | |
1208 | } | |
571ecf67 JB |
1209 | } |
1210 | ||
d012a605 | 1211 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1212 | { |
bdcbd8e0 JB |
1213 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1214 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1215 | |
c2c98fde | 1216 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1217 | /* |
1218 | * Clear the flag only if the other one is still set | |
1219 | * so that the TX path won't start TX'ing new frames | |
1220 | * directly ... In the case that the driver flag isn't | |
1221 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1222 | */ | |
1223 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1224 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1225 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1226 | return; |
1227 | } | |
1228 | ||
5ac2e350 JB |
1229 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1230 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1231 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1232 | } |
1233 | ||
d057e5a3 AN |
1234 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1235 | { | |
1236 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1237 | bool in_ps; | |
1238 | ||
1239 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1240 | ||
1241 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1242 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1243 | if ((start && in_ps) || (!start && !in_ps)) |
1244 | return -EINVAL; | |
1245 | ||
1246 | if (start) | |
d012a605 | 1247 | sta_ps_start(sta_inf); |
d057e5a3 | 1248 | else |
d012a605 | 1249 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1250 | |
1251 | return 0; | |
1252 | } | |
1253 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1254 | ||
47086fc5 JB |
1255 | static ieee80211_rx_result debug_noinline |
1256 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1257 | { | |
1258 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1259 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1260 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1261 | int tid, ac; | |
1262 | ||
5c90067c | 1263 | if (!rx->sta) |
47086fc5 JB |
1264 | return RX_CONTINUE; |
1265 | ||
1266 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1267 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1268 | return RX_CONTINUE; | |
1269 | ||
1270 | /* | |
1271 | * The device handles station powersave, so don't do anything about | |
1272 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1273 | * it to mac80211 since they're handled.) | |
1274 | */ | |
1275 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1276 | return RX_CONTINUE; | |
1277 | ||
1278 | /* | |
1279 | * Don't do anything if the station isn't already asleep. In | |
1280 | * the uAPSD case, the station will probably be marked asleep, | |
1281 | * in the PS-Poll case the station must be confused ... | |
1282 | */ | |
c2c98fde | 1283 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1284 | return RX_CONTINUE; |
1285 | ||
1286 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1287 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1288 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1289 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1290 | else | |
c2c98fde | 1291 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1292 | } |
47086fc5 JB |
1293 | |
1294 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1295 | * count as an dropped frame. */ | |
1296 | dev_kfree_skb(rx->skb); | |
1297 | ||
1298 | return RX_QUEUED; | |
1299 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1300 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1301 | ieee80211_has_pm(hdr->frame_control) && | |
1302 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1303 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1304 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1305 | ac = ieee802_1d_to_ac[tid & 7]; | |
1306 | ||
1307 | /* | |
1308 | * If this AC is not trigger-enabled do nothing. | |
1309 | * | |
1310 | * NB: This could/should check a separate bitmap of trigger- | |
1311 | * enabled queues, but for now we only implement uAPSD w/o | |
1312 | * TSPEC changes to the ACs, so they're always the same. | |
1313 | */ | |
1314 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1315 | return RX_CONTINUE; | |
1316 | ||
1317 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1318 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1319 | return RX_CONTINUE; |
1320 | ||
c2c98fde | 1321 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1322 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1323 | else | |
c2c98fde | 1324 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1325 | } |
1326 | ||
1327 | return RX_CONTINUE; | |
1328 | } | |
1329 | ||
49461622 | 1330 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1331 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1332 | { |
1333 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1334 | struct sk_buff *skb = rx->skb; |
1335 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1336 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1337 | int i; |
571ecf67 JB |
1338 | |
1339 | if (!sta) | |
9ae54c84 | 1340 | return RX_CONTINUE; |
571ecf67 | 1341 | |
b291ba11 JB |
1342 | /* |
1343 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1344 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1345 | * current IBSS network alive in cases where other STAs start | |
1346 | * using different BSSID. This will also give the station another | |
1347 | * chance to restart the authentication/authorization in case | |
1348 | * something went wrong the first time. | |
b291ba11 | 1349 | */ |
05c914fe | 1350 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1351 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1352 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1353 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1354 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1355 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1356 | if (ieee80211_is_data(hdr->frame_control) && |
1357 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1358 | sta->last_rx_rate_idx = status->rate_idx; |
1359 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1360 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1361 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1362 | } |
1363 | } | |
239281f8 RL |
1364 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
1365 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, | |
1366 | NL80211_IFTYPE_OCB); | |
1367 | /* OCB uses wild-card BSSID */ | |
1368 | if (is_broadcast_ether_addr(bssid)) | |
1369 | sta->last_rx = jiffies; | |
b291ba11 JB |
1370 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1371 | /* | |
33b64eb2 LCC |
1372 | * Mesh beacons will update last_rx when if they are found to |
1373 | * match the current local configuration when processed. | |
571ecf67 | 1374 | */ |
b291ba11 | 1375 | sta->last_rx = jiffies; |
3af6334c FF |
1376 | if (ieee80211_is_data(hdr->frame_control)) { |
1377 | sta->last_rx_rate_idx = status->rate_idx; | |
1378 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1379 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1380 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1381 | } |
571ecf67 JB |
1382 | } |
1383 | ||
3cf335d5 KV |
1384 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1385 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1386 | ||
571ecf67 JB |
1387 | sta->rx_fragments++; |
1388 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1389 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1390 | sta->last_signal = status->signal; | |
1391 | ewma_add(&sta->avg_signal, -status->signal); | |
1392 | } | |
571ecf67 | 1393 | |
ef0621e8 FF |
1394 | if (status->chains) { |
1395 | sta->chains = status->chains; | |
1396 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1397 | int signal = status->chain_signal[i]; | |
1398 | ||
1399 | if (!(status->chains & BIT(i))) | |
1400 | continue; | |
1401 | ||
1402 | sta->chain_signal_last[i] = signal; | |
1403 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1404 | } | |
1405 | } | |
1406 | ||
72eaa43a JB |
1407 | /* |
1408 | * Change STA power saving mode only at the end of a frame | |
1409 | * exchange sequence. | |
1410 | */ | |
d057e5a3 AN |
1411 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1412 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1413 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1414 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1415 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1416 | /* PM bit is only checked in frames where it isn't reserved, | |
1417 | * in AP mode it's reserved in non-bufferable management frames | |
1418 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1419 | */ | |
1420 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1421 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1422 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1423 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1424 | sta_ps_end(sta); |
72eaa43a JB |
1425 | } else { |
1426 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1427 | sta_ps_start(sta); |
72eaa43a | 1428 | } |
571ecf67 JB |
1429 | } |
1430 | ||
3f52b7e3 MP |
1431 | /* mesh power save support */ |
1432 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1433 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1434 | ||
22403def JB |
1435 | /* |
1436 | * Drop (qos-)data::nullfunc frames silently, since they | |
1437 | * are used only to control station power saving mode. | |
1438 | */ | |
1439 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1440 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1441 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1442 | |
1443 | /* | |
1444 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1445 | * that was not moved to a 4-addr STA vlan yet send |
1446 | * the event to userspace and for older hostapd drop | |
1447 | * the frame to the monitor interface. | |
d524215f FF |
1448 | */ |
1449 | if (ieee80211_has_a4(hdr->frame_control) && | |
1450 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1451 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1452 | !rx->sdata->u.vlan.sta))) { |
1453 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1454 | cfg80211_rx_unexpected_4addr_frame( | |
1455 | rx->sdata->dev, sta->sta.addr, | |
1456 | GFP_ATOMIC); | |
d524215f | 1457 | return RX_DROP_MONITOR; |
e7f4a940 | 1458 | } |
22403def JB |
1459 | /* |
1460 | * Update counter and free packet here to avoid | |
1461 | * counting this as a dropped packed. | |
1462 | */ | |
571ecf67 JB |
1463 | sta->rx_packets++; |
1464 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1465 | return RX_QUEUED; |
571ecf67 JB |
1466 | } |
1467 | ||
9ae54c84 | 1468 | return RX_CONTINUE; |
571ecf67 JB |
1469 | } /* ieee80211_rx_h_sta_process */ |
1470 | ||
86c228a7 JA |
1471 | static ieee80211_rx_result debug_noinline |
1472 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1473 | { | |
1474 | struct sk_buff *skb = rx->skb; | |
1475 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1476 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1477 | int keyidx; | |
1478 | int hdrlen; | |
1479 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1480 | struct ieee80211_key *sta_ptk = NULL; | |
1481 | int mmie_keyidx = -1; | |
1482 | __le16 fc; | |
2475b1cc | 1483 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1484 | |
1485 | /* | |
1486 | * Key selection 101 | |
1487 | * | |
1488 | * There are four types of keys: | |
1489 | * - GTK (group keys) | |
1490 | * - IGTK (group keys for management frames) | |
1491 | * - PTK (pairwise keys) | |
1492 | * - STK (station-to-station pairwise keys) | |
1493 | * | |
1494 | * When selecting a key, we have to distinguish between multicast | |
1495 | * (including broadcast) and unicast frames, the latter can only | |
1496 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1497 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1498 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1499 | * don't have a PTK/STK we check the key index for a WEP key. | |
1500 | * | |
1501 | * Note that in a regular BSS, multicast frames are sent by the | |
1502 | * AP only, associated stations unicast the frame to the AP first | |
1503 | * which then multicasts it on their behalf. | |
1504 | * | |
1505 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1506 | * with each station, that is something we don't currently handle. | |
1507 | * The spec seems to expect that one negotiates the same key with | |
1508 | * every station but there's no such requirement; VLANs could be | |
1509 | * possible. | |
1510 | */ | |
1511 | ||
86c228a7 JA |
1512 | /* start without a key */ |
1513 | rx->key = NULL; | |
2475b1cc | 1514 | fc = hdr->frame_control; |
86c228a7 | 1515 | |
2475b1cc MS |
1516 | if (rx->sta) { |
1517 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1518 | |
2475b1cc MS |
1519 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1520 | cs = rx->sta->cipher_scheme; | |
1521 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1522 | if (unlikely(keyid < 0)) | |
1523 | return RX_DROP_UNUSABLE; | |
1524 | } | |
1525 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1526 | } | |
86c228a7 JA |
1527 | |
1528 | if (!ieee80211_has_protected(fc)) | |
1529 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1530 | ||
1531 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1532 | rx->key = sta_ptk; | |
1533 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1534 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1535 | return RX_CONTINUE; | |
1536 | /* Skip decryption if the frame is not protected. */ | |
1537 | if (!ieee80211_has_protected(fc)) | |
1538 | return RX_CONTINUE; | |
1539 | } else if (mmie_keyidx >= 0) { | |
1540 | /* Broadcast/multicast robust management frame / BIP */ | |
1541 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1542 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1543 | return RX_CONTINUE; | |
1544 | ||
1545 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1546 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1547 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1548 | if (rx->sta) | |
1549 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1550 | if (!rx->key) | |
1551 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1552 | } else if (!ieee80211_has_protected(fc)) { | |
1553 | /* | |
1554 | * The frame was not protected, so skip decryption. However, we | |
1555 | * need to set rx->key if there is a key that could have been | |
1556 | * used so that the frame may be dropped if encryption would | |
1557 | * have been expected. | |
1558 | */ | |
1559 | struct ieee80211_key *key = NULL; | |
1560 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1561 | int i; | |
1562 | ||
1563 | if (ieee80211_is_mgmt(fc) && | |
1564 | is_multicast_ether_addr(hdr->addr1) && | |
1565 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1566 | rx->key = key; | |
1567 | else { | |
1568 | if (rx->sta) { | |
1569 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1570 | key = rcu_dereference(rx->sta->gtk[i]); | |
1571 | if (key) | |
1572 | break; | |
1573 | } | |
1574 | } | |
1575 | if (!key) { | |
1576 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1577 | key = rcu_dereference(sdata->keys[i]); | |
1578 | if (key) | |
1579 | break; | |
1580 | } | |
1581 | } | |
1582 | if (key) | |
1583 | rx->key = key; | |
1584 | } | |
1585 | return RX_CONTINUE; | |
1586 | } else { | |
1587 | u8 keyid; | |
2475b1cc | 1588 | |
86c228a7 JA |
1589 | /* |
1590 | * The device doesn't give us the IV so we won't be | |
1591 | * able to look up the key. That's ok though, we | |
1592 | * don't need to decrypt the frame, we just won't | |
1593 | * be able to keep statistics accurate. | |
1594 | * Except for key threshold notifications, should | |
1595 | * we somehow allow the driver to tell us which key | |
1596 | * the hardware used if this flag is set? | |
1597 | */ | |
1598 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1599 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1600 | return RX_CONTINUE; | |
1601 | ||
1602 | hdrlen = ieee80211_hdrlen(fc); | |
1603 | ||
2475b1cc MS |
1604 | if (cs) { |
1605 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1606 | |
2475b1cc MS |
1607 | if (unlikely(keyidx < 0)) |
1608 | return RX_DROP_UNUSABLE; | |
1609 | } else { | |
1610 | if (rx->skb->len < 8 + hdrlen) | |
1611 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1612 | /* | |
1613 | * no need to call ieee80211_wep_get_keyidx, | |
1614 | * it verifies a bunch of things we've done already | |
1615 | */ | |
1616 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1617 | keyidx = keyid >> 6; | |
1618 | } | |
86c228a7 JA |
1619 | |
1620 | /* check per-station GTK first, if multicast packet */ | |
1621 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1622 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1623 | ||
1624 | /* if not found, try default key */ | |
1625 | if (!rx->key) { | |
1626 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1627 | ||
1628 | /* | |
1629 | * RSNA-protected unicast frames should always be | |
1630 | * sent with pairwise or station-to-station keys, | |
1631 | * but for WEP we allow using a key index as well. | |
1632 | */ | |
1633 | if (rx->key && | |
1634 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1635 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1636 | !is_multicast_ether_addr(hdr->addr1)) | |
1637 | rx->key = NULL; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | if (rx->key) { | |
1642 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1643 | return RX_DROP_MONITOR; | |
1644 | ||
1645 | rx->key->tx_rx_count++; | |
1646 | /* TODO: add threshold stuff again */ | |
1647 | } else { | |
1648 | return RX_DROP_MONITOR; | |
1649 | } | |
1650 | ||
1651 | switch (rx->key->conf.cipher) { | |
1652 | case WLAN_CIPHER_SUITE_WEP40: | |
1653 | case WLAN_CIPHER_SUITE_WEP104: | |
1654 | result = ieee80211_crypto_wep_decrypt(rx); | |
1655 | break; | |
1656 | case WLAN_CIPHER_SUITE_TKIP: | |
1657 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1658 | break; | |
1659 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db JM |
1660 | result = ieee80211_crypto_ccmp_decrypt( |
1661 | rx, IEEE80211_CCMP_MIC_LEN); | |
1662 | break; | |
1663 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1664 | result = ieee80211_crypto_ccmp_decrypt( | |
1665 | rx, IEEE80211_CCMP_256_MIC_LEN); | |
86c228a7 JA |
1666 | break; |
1667 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1668 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1669 | break; | |
56c52da2 JM |
1670 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1671 | result = ieee80211_crypto_aes_cmac_256_decrypt(rx); | |
1672 | break; | |
8ade538b JM |
1673 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1674 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1675 | result = ieee80211_crypto_aes_gmac_decrypt(rx); | |
1676 | break; | |
00b9cfa3 JM |
1677 | case WLAN_CIPHER_SUITE_GCMP: |
1678 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1679 | result = ieee80211_crypto_gcmp_decrypt(rx); | |
1680 | break; | |
86c228a7 | 1681 | default: |
2475b1cc | 1682 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1683 | } |
1684 | ||
1685 | /* the hdr variable is invalid after the decrypt handlers */ | |
1686 | ||
1687 | /* either the frame has been decrypted or will be dropped */ | |
1688 | status->flag |= RX_FLAG_DECRYPTED; | |
1689 | ||
1690 | return result; | |
1691 | } | |
1692 | ||
571ecf67 JB |
1693 | static inline struct ieee80211_fragment_entry * |
1694 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1695 | unsigned int frag, unsigned int seq, int rx_queue, | |
1696 | struct sk_buff **skb) | |
1697 | { | |
1698 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1699 | |
571ecf67 JB |
1700 | entry = &sdata->fragments[sdata->fragment_next++]; |
1701 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1702 | sdata->fragment_next = 0; | |
1703 | ||
bdcbd8e0 | 1704 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1705 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1706 | |
1707 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1708 | *skb = NULL; | |
1709 | entry->first_frag_time = jiffies; | |
1710 | entry->seq = seq; | |
1711 | entry->rx_queue = rx_queue; | |
1712 | entry->last_frag = frag; | |
1713 | entry->ccmp = 0; | |
1714 | entry->extra_len = 0; | |
1715 | ||
1716 | return entry; | |
1717 | } | |
1718 | ||
1719 | static inline struct ieee80211_fragment_entry * | |
1720 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1721 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1722 | int rx_queue, struct ieee80211_hdr *hdr) |
1723 | { | |
1724 | struct ieee80211_fragment_entry *entry; | |
1725 | int i, idx; | |
1726 | ||
1727 | idx = sdata->fragment_next; | |
1728 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1729 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1730 | |
1731 | idx--; | |
1732 | if (idx < 0) | |
1733 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1734 | ||
1735 | entry = &sdata->fragments[idx]; | |
1736 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1737 | entry->rx_queue != rx_queue || | |
1738 | entry->last_frag + 1 != frag) | |
1739 | continue; | |
1740 | ||
b73d70ad | 1741 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1742 | |
b73d70ad HH |
1743 | /* |
1744 | * Check ftype and addresses are equal, else check next fragment | |
1745 | */ | |
1746 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1747 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1748 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1749 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1750 | continue; |
1751 | ||
ab46623e | 1752 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1753 | __skb_queue_purge(&entry->skb_list); |
1754 | continue; | |
1755 | } | |
1756 | return entry; | |
1757 | } | |
1758 | ||
1759 | return NULL; | |
1760 | } | |
1761 | ||
49461622 | 1762 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1763 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1764 | { |
1765 | struct ieee80211_hdr *hdr; | |
1766 | u16 sc; | |
358c8d9d | 1767 | __le16 fc; |
571ecf67 JB |
1768 | unsigned int frag, seq; |
1769 | struct ieee80211_fragment_entry *entry; | |
1770 | struct sk_buff *skb; | |
554891e6 | 1771 | struct ieee80211_rx_status *status; |
571ecf67 | 1772 | |
b73d70ad | 1773 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1774 | fc = hdr->frame_control; |
f7fbf70e JC |
1775 | |
1776 | if (ieee80211_is_ctl(fc)) | |
1777 | return RX_CONTINUE; | |
1778 | ||
571ecf67 JB |
1779 | sc = le16_to_cpu(hdr->seq_ctrl); |
1780 | frag = sc & IEEE80211_SCTL_FRAG; | |
1781 | ||
b8fff407 JB |
1782 | if (is_multicast_ether_addr(hdr->addr1)) { |
1783 | rx->local->dot11MulticastReceivedFrameCount++; | |
d025933e | 1784 | goto out_no_led; |
571ecf67 | 1785 | } |
b8fff407 | 1786 | |
d025933e AM |
1787 | if (likely(!ieee80211_has_morefrags(fc) && frag == 0)) |
1788 | goto out; | |
1789 | ||
571ecf67 JB |
1790 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
1791 | ||
e3cf8b3f ZY |
1792 | if (skb_linearize(rx->skb)) |
1793 | return RX_DROP_UNUSABLE; | |
1794 | ||
058897a4 AK |
1795 | /* |
1796 | * skb_linearize() might change the skb->data and | |
1797 | * previously cached variables (in this case, hdr) need to | |
1798 | * be refreshed with the new data. | |
1799 | */ | |
1800 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1801 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1802 | ||
1803 | if (frag == 0) { | |
1804 | /* This is the first fragment of a new frame. */ | |
1805 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1806 | rx->seqno_idx, &(rx->skb)); |
2b2ba0db JM |
1807 | if (rx->key && |
1808 | (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP || | |
1809 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256) && | |
358c8d9d | 1810 | ieee80211_has_protected(fc)) { |
9e26297a | 1811 | int queue = rx->security_idx; |
571ecf67 JB |
1812 | /* Store CCMP PN so that we can verify that the next |
1813 | * fragment has a sequential PN value. */ | |
1814 | entry->ccmp = 1; | |
1815 | memcpy(entry->last_pn, | |
9190252c | 1816 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1817 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1818 | } |
9ae54c84 | 1819 | return RX_QUEUED; |
571ecf67 JB |
1820 | } |
1821 | ||
1822 | /* This is a fragment for a frame that should already be pending in | |
1823 | * fragment cache. Add this fragment to the end of the pending entry. | |
1824 | */ | |
9e26297a JB |
1825 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1826 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1827 | if (!entry) { |
1828 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1829 | return RX_DROP_MONITOR; |
571ecf67 JB |
1830 | } |
1831 | ||
1832 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1833 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1834 | if (entry->ccmp) { | |
1835 | int i; | |
4325f6ca | 1836 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1837 | int queue; |
2b2ba0db JM |
1838 | if (!rx->key || |
1839 | (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP && | |
1840 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256)) | |
e4c26add | 1841 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1842 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1843 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1844 | pn[i]++; |
1845 | if (pn[i]) | |
1846 | break; | |
1847 | } | |
9e26297a | 1848 | queue = rx->security_idx; |
9190252c | 1849 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1850 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1851 | return RX_DROP_UNUSABLE; |
4325f6ca | 1852 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1853 | } |
1854 | ||
358c8d9d | 1855 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1856 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1857 | entry->last_frag = frag; | |
1858 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1859 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1860 | rx->skb = NULL; |
9ae54c84 | 1861 | return RX_QUEUED; |
571ecf67 JB |
1862 | } |
1863 | ||
1864 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1865 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1866 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1867 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1868 | GFP_ATOMIC))) { | |
1869 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1870 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1871 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1872 | } |
1873 | } | |
1874 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1875 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1876 | dev_kfree_skb(skb); | |
1877 | } | |
1878 | ||
1879 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1880 | status = IEEE80211_SKB_RXCB(rx->skb); |
1881 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1882 | |
1883 | out: | |
d025933e AM |
1884 | ieee80211_led_rx(rx->local); |
1885 | out_no_led: | |
571ecf67 JB |
1886 | if (rx->sta) |
1887 | rx->sta->rx_packets++; | |
9ae54c84 | 1888 | return RX_CONTINUE; |
571ecf67 JB |
1889 | } |
1890 | ||
1df332e8 | 1891 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1892 | { |
1df332e8 | 1893 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1894 | return -EACCES; |
571ecf67 | 1895 | |
76ee65bf | 1896 | return 0; |
571ecf67 JB |
1897 | } |
1898 | ||
1df332e8 | 1899 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1900 | { |
eb9fb5b8 JB |
1901 | struct sk_buff *skb = rx->skb; |
1902 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1903 | ||
3017b80b | 1904 | /* |
7848ba7d JB |
1905 | * Pass through unencrypted frames if the hardware has |
1906 | * decrypted them already. | |
3017b80b | 1907 | */ |
eb9fb5b8 | 1908 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1909 | return 0; |
571ecf67 JB |
1910 | |
1911 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1912 | if (unlikely(!ieee80211_has_protected(fc) && |
1913 | !ieee80211_is_nullfunc(fc) && | |
e8f4fb7c | 1914 | ieee80211_is_data(fc) && rx->key)) |
76ee65bf | 1915 | return -EACCES; |
bef5d1c7 JB |
1916 | |
1917 | return 0; | |
1918 | } | |
1919 | ||
1df332e8 | 1920 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1921 | { |
1922 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1923 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1924 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1925 | |
e3efca0a JM |
1926 | /* |
1927 | * Pass through unencrypted frames if the hardware has | |
1928 | * decrypted them already. | |
1929 | */ | |
1930 | if (status->flag & RX_FLAG_DECRYPTED) | |
1931 | return 0; | |
bef5d1c7 | 1932 | |
c2c98fde | 1933 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1934 | if (unlikely(!ieee80211_has_protected(fc) && |
1935 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1936 | rx->key)) { |
6ff57cf8 JB |
1937 | if (ieee80211_is_deauth(fc) || |
1938 | ieee80211_is_disassoc(fc)) | |
1939 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1940 | rx->skb->data, | |
1941 | rx->skb->len); | |
f2ca3ea4 | 1942 | return -EACCES; |
cf4e594e | 1943 | } |
f2ca3ea4 | 1944 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1945 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1946 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1947 | if (ieee80211_is_deauth(fc) || |
1948 | ieee80211_is_disassoc(fc)) | |
1949 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1950 | rx->skb->data, | |
1951 | rx->skb->len); | |
f2ca3ea4 | 1952 | return -EACCES; |
cf4e594e | 1953 | } |
f2ca3ea4 JM |
1954 | /* |
1955 | * When using MFP, Action frames are not allowed prior to | |
1956 | * having configured keys. | |
1957 | */ | |
1958 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1959 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1960 | return -EACCES; |
1961 | } | |
b3fc9c6c | 1962 | |
76ee65bf | 1963 | return 0; |
571ecf67 JB |
1964 | } |
1965 | ||
76ee65bf | 1966 | static int |
4114fa21 | 1967 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1968 | { |
eb9fb5b8 | 1969 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1970 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1971 | bool check_port_control = false; |
1972 | struct ethhdr *ehdr; | |
1973 | int ret; | |
f14543ee | 1974 | |
4114fa21 | 1975 | *port_control = false; |
9bc383de JB |
1976 | if (ieee80211_has_a4(hdr->frame_control) && |
1977 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1978 | return -1; |
9bc383de | 1979 | |
fbb327c5 FF |
1980 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1981 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1982 | ||
1983 | if (!sdata->u.mgd.use_4addr) | |
1984 | return -1; | |
1985 | else | |
1986 | check_port_control = true; | |
1987 | } | |
1988 | ||
9bc383de | 1989 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1990 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1991 | return -1; |
571ecf67 | 1992 | |
fbb327c5 | 1993 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1994 | if (ret < 0) |
fbb327c5 FF |
1995 | return ret; |
1996 | ||
1997 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1998 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1999 | *port_control = true; | |
2000 | else if (check_port_control) | |
fbb327c5 FF |
2001 | return -1; |
2002 | ||
2003 | return 0; | |
76ee65bf | 2004 | } |
571ecf67 | 2005 | |
ce3edf6d JB |
2006 | /* |
2007 | * requires that rx->skb is a frame with ethernet header | |
2008 | */ | |
358c8d9d | 2009 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 2010 | { |
c97c23e3 | 2011 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
2012 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
2013 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
2014 | ||
2015 | /* | |
2016 | * Allow EAPOL frames to us/the PAE group address regardless | |
2017 | * of whether the frame was encrypted or not. | |
2018 | */ | |
a621fa4d | 2019 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
2020 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
2021 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
2022 | return true; |
2023 | ||
2024 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 2025 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
2026 | return false; |
2027 | ||
2028 | return true; | |
2029 | } | |
2030 | ||
2031 | /* | |
2032 | * requires that rx->skb is a frame with ethernet header | |
2033 | */ | |
76ee65bf | 2034 | static void |
5cf121c3 | 2035 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2036 | { |
eb9fb5b8 JB |
2037 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2038 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2039 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2040 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2041 | struct sta_info *dsta; | |
571ecf67 | 2042 | |
4cc0dba9 JB |
2043 | dev->stats.rx_packets++; |
2044 | dev->stats.rx_bytes += rx->skb->len; | |
2045 | ||
76ee65bf RR |
2046 | skb = rx->skb; |
2047 | xmit_skb = NULL; | |
571ecf67 | 2048 | |
05c914fe JB |
2049 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2050 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2051 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
9bc383de | 2052 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
2053 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
2054 | /* | |
2055 | * send multicast frames both to higher layers in | |
2056 | * local net stack and back to the wireless medium | |
2057 | */ | |
76ee65bf | 2058 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2059 | if (!xmit_skb) |
bdcbd8e0 | 2060 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2061 | dev->name); |
571ecf67 | 2062 | } else { |
abe60632 JB |
2063 | dsta = sta_info_get(sdata, skb->data); |
2064 | if (dsta) { | |
ce3edf6d JB |
2065 | /* |
2066 | * The destination station is associated to | |
2067 | * this AP (in this VLAN), so send the frame | |
2068 | * directly to it and do not pass it to local | |
2069 | * net stack. | |
571ecf67 | 2070 | */ |
76ee65bf | 2071 | xmit_skb = skb; |
571ecf67 JB |
2072 | skb = NULL; |
2073 | } | |
571ecf67 JB |
2074 | } |
2075 | } | |
2076 | ||
59d9cb07 | 2077 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2078 | if (skb) { |
2079 | /* 'align' will only take the values 0 or 2 here since all | |
2080 | * frames are required to be aligned to 2-byte boundaries | |
2081 | * when being passed to mac80211; the code here works just | |
2082 | * as well if that isn't true, but mac80211 assumes it can | |
2083 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2084 | */ |
9e890a1f JB |
2085 | int align; |
2086 | ||
2087 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2088 | if (align) { |
2089 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2090 | dev_kfree_skb(skb); | |
2091 | skb = NULL; | |
2092 | } else { | |
2093 | u8 *data = skb->data; | |
8ce0b589 ZY |
2094 | size_t len = skb_headlen(skb); |
2095 | skb->data -= align; | |
2096 | memmove(skb->data, data, len); | |
2097 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2098 | } |
2099 | } | |
9e890a1f | 2100 | } |
d1c3a37c JB |
2101 | #endif |
2102 | ||
9e890a1f JB |
2103 | if (skb) { |
2104 | /* deliver to local stack */ | |
2105 | skb->protocol = eth_type_trans(skb, dev); | |
2106 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
2107 | if (rx->local->napi) |
2108 | napi_gro_receive(rx->local->napi, skb); | |
2109 | else | |
2110 | netif_receive_skb(skb); | |
571ecf67 JB |
2111 | } |
2112 | ||
76ee65bf | 2113 | if (xmit_skb) { |
aef6c928 HS |
2114 | /* |
2115 | * Send to wireless media and increase priority by 256 to | |
2116 | * keep the received priority instead of reclassifying | |
2117 | * the frame (see cfg80211_classify8021d). | |
2118 | */ | |
2119 | xmit_skb->priority += 256; | |
f831e909 | 2120 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2121 | skb_reset_network_header(xmit_skb); |
2122 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2123 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2124 | } |
76ee65bf RR |
2125 | } |
2126 | ||
49461622 | 2127 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2128 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2129 | { |
eb9fb5b8 | 2130 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2131 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2132 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2133 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2134 | struct sk_buff_head frame_list; |
554891e6 | 2135 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2136 | |
358c8d9d | 2137 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2138 | return RX_CONTINUE; |
fd4c7f2f | 2139 | |
358c8d9d | 2140 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2141 | return RX_DROP_MONITOR; |
fd4c7f2f | 2142 | |
554891e6 | 2143 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2144 | return RX_CONTINUE; |
fd4c7f2f | 2145 | |
eaf85ca7 ZY |
2146 | if (ieee80211_has_a4(hdr->frame_control) && |
2147 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2148 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2149 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2150 | |
eaf85ca7 ZY |
2151 | if (is_multicast_ether_addr(hdr->addr1) && |
2152 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2153 | rx->sdata->u.vlan.sta) || | |
2154 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2155 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2156 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2157 | |
eaf85ca7 ZY |
2158 | skb->dev = dev; |
2159 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2160 | |
e3cf8b3f ZY |
2161 | if (skb_linearize(skb)) |
2162 | return RX_DROP_UNUSABLE; | |
2163 | ||
eaf85ca7 ZY |
2164 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2165 | rx->sdata->vif.type, | |
8b3becad | 2166 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2167 | |
eaf85ca7 ZY |
2168 | while (!skb_queue_empty(&frame_list)) { |
2169 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2170 | |
358c8d9d | 2171 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2172 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2173 | continue; |
2174 | } | |
fd4c7f2f RR |
2175 | |
2176 | ieee80211_deliver_skb(rx); | |
2177 | } | |
2178 | ||
9ae54c84 | 2179 | return RX_QUEUED; |
fd4c7f2f RR |
2180 | } |
2181 | ||
bf94e17b | 2182 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2183 | static ieee80211_rx_result |
e32f85f7 LCC |
2184 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2185 | { | |
30789eb6 TP |
2186 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2187 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2188 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2189 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2190 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2191 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
30789eb6 | 2192 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2193 | u16 q, hdrlen; |
e32f85f7 LCC |
2194 | |
2195 | hdr = (struct ieee80211_hdr *) skb->data; | |
2196 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2197 | |
2198 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2199 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2200 | return RX_DROP_MONITOR; | |
2201 | ||
2202 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2203 | ||
2204 | /* make sure full mesh header is there, also checks skb len */ | |
2205 | if (!pskb_may_pull(rx->skb, | |
2206 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2207 | return RX_DROP_MONITOR; | |
2208 | ||
2209 | /* reload pointers */ | |
2210 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2211 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2212 | ||
d0c22119 BC |
2213 | if (ieee80211_drop_unencrypted(rx, hdr->frame_control)) |
2214 | return RX_DROP_MONITOR; | |
2215 | ||
2157fdd6 TP |
2216 | /* frame is in RMC, don't forward */ |
2217 | if (ieee80211_is_data(hdr->frame_control) && | |
2218 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2219 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2220 | return RX_DROP_MONITOR; |
2221 | ||
5c90067c | 2222 | if (!ieee80211_is_data(hdr->frame_control)) |
e32f85f7 LCC |
2223 | return RX_CONTINUE; |
2224 | ||
2225 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2226 | return RX_DROP_MONITOR; |
2227 | ||
43b7b314 | 2228 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2229 | struct mesh_path *mppath; |
43b7b314 JC |
2230 | char *proxied_addr; |
2231 | char *mpp_addr; | |
2232 | ||
2233 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2234 | mpp_addr = hdr->addr3; | |
2235 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2236 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2237 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2238 | mpp_addr = hdr->addr4; |
2239 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2240 | } else { |
2241 | return RX_DROP_MONITOR; | |
43b7b314 | 2242 | } |
79617dee | 2243 | |
79617dee | 2244 | rcu_read_lock(); |
bf7cd94d | 2245 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2246 | if (!mppath) { |
bf7cd94d | 2247 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2248 | } else { |
2249 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2250 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2251 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2252 | spin_unlock_bh(&mppath->state_lock); |
2253 | } | |
2254 | rcu_read_unlock(); | |
2255 | } | |
2256 | ||
3c5772a5 JC |
2257 | /* Frame has reached destination. Don't forward */ |
2258 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2259 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2260 | return RX_CONTINUE; |
2261 | ||
00e96dec | 2262 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2263 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2264 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2265 | return RX_DROP_MONITOR; |
2266 | } | |
2267 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2268 | |
30789eb6 TP |
2269 | if (!--mesh_hdr->ttl) { |
2270 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2271 | goto out; |
30789eb6 TP |
2272 | } |
2273 | ||
d665508b CYY |
2274 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2275 | goto out; | |
2276 | ||
30789eb6 TP |
2277 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2278 | if (!fwd_skb) { | |
bdcbd8e0 | 2279 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2280 | sdata->name); |
30789eb6 TP |
2281 | goto out; |
2282 | } | |
2283 | ||
2284 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2285 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2286 | info = IEEE80211_SKB_CB(fwd_skb); |
2287 | memset(info, 0, sizeof(*info)); | |
2288 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2289 | info->control.vif = &rx->sdata->vif; | |
2290 | info->control.jiffies = jiffies; | |
2291 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2292 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2293 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2294 | /* update power mode indication when forwarding */ |
2295 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2296 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2297 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2298 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2299 | } else { | |
2300 | /* unable to resolve next hop */ | |
bf7cd94d | 2301 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2302 | fwd_hdr->addr3, 0, |
2303 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2304 | fwd_hdr->addr2); | |
30789eb6 | 2305 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2306 | kfree_skb(fwd_skb); |
30789eb6 | 2307 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2308 | } |
2309 | ||
30789eb6 TP |
2310 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2311 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2312 | out: |
df140465 | 2313 | if (is_multicast_ether_addr(hdr->addr1)) |
e32f85f7 | 2314 | return RX_CONTINUE; |
df140465 | 2315 | return RX_DROP_MONITOR; |
e32f85f7 | 2316 | } |
bf94e17b | 2317 | #endif |
e32f85f7 | 2318 | |
49461622 | 2319 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2320 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2321 | { |
eb9fb5b8 | 2322 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2323 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2324 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2325 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2326 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2327 | bool port_control; |
ce3edf6d | 2328 | int err; |
76ee65bf | 2329 | |
358c8d9d | 2330 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2331 | return RX_CONTINUE; |
76ee65bf | 2332 | |
358c8d9d | 2333 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2334 | return RX_DROP_MONITOR; |
76ee65bf | 2335 | |
79c892b8 | 2336 | if (rx->sta) { |
3d6dc343 | 2337 | /* The seqno index has the same property as needed |
79c892b8 JB |
2338 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS |
2339 | * for non-QoS-data frames. Here we know it's a data | |
2340 | * frame, so count MSDUs. | |
2341 | */ | |
3d6dc343 | 2342 | rx->sta->rx_msdu[rx->seqno_idx]++; |
79c892b8 JB |
2343 | } |
2344 | ||
f14543ee | 2345 | /* |
e7f4a940 JB |
2346 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2347 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2348 | */ |
2349 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2350 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2351 | if (rx->sta && | |
2352 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2353 | cfg80211_rx_unexpected_4addr_frame( | |
2354 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2355 | return RX_DROP_MONITOR; |
e7f4a940 | 2356 | } |
f14543ee | 2357 | |
4114fa21 | 2358 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2359 | if (unlikely(err)) |
e4c26add | 2360 | return RX_DROP_UNUSABLE; |
76ee65bf | 2361 | |
358c8d9d | 2362 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2363 | return RX_DROP_MONITOR; |
ce3edf6d | 2364 | |
8a4d32f3 AN |
2365 | /* directly handle TDLS channel switch requests/responses */ |
2366 | if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == | |
2367 | cpu_to_be16(ETH_P_TDLS))) { | |
2368 | struct ieee80211_tdls_data *tf = (void *)rx->skb->data; | |
2369 | ||
2370 | if (pskb_may_pull(rx->skb, | |
2371 | offsetof(struct ieee80211_tdls_data, u)) && | |
2372 | tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && | |
2373 | tf->category == WLAN_CATEGORY_TDLS && | |
2374 | (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || | |
2375 | tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { | |
2376 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TDLS_CHSW; | |
2377 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2378 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
2379 | if (rx->sta) | |
2380 | rx->sta->rx_packets++; | |
2381 | ||
2382 | return RX_QUEUED; | |
2383 | } | |
2384 | } | |
2385 | ||
4114fa21 FF |
2386 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2387 | unlikely(port_control) && sdata->bss) { | |
2388 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2389 | u.ap); | |
2390 | dev = sdata->dev; | |
2391 | rx->sdata = sdata; | |
2392 | } | |
2393 | ||
76ee65bf RR |
2394 | rx->skb->dev = dev; |
2395 | ||
08ca944e | 2396 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2397 | !is_multicast_ether_addr( |
2398 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2399 | (!local->scanning && | |
2400 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2401 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2402 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2403 | } | |
2404 | ||
76ee65bf | 2405 | ieee80211_deliver_skb(rx); |
571ecf67 | 2406 | |
9ae54c84 | 2407 | return RX_QUEUED; |
571ecf67 JB |
2408 | } |
2409 | ||
49461622 | 2410 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2411 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2412 | { |
71364716 | 2413 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2414 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2415 | struct tid_ampdu_rx *tid_agg_rx; |
2416 | u16 start_seq_num; | |
2417 | u16 tid; | |
2418 | ||
a7767f95 | 2419 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2420 | return RX_CONTINUE; |
71364716 | 2421 | |
a7767f95 | 2422 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2423 | struct { |
2424 | __le16 control, start_seq_num; | |
2425 | } __packed bar_data; | |
2426 | ||
71364716 | 2427 | if (!rx->sta) |
a02ae758 | 2428 | return RX_DROP_MONITOR; |
8ae5977f JB |
2429 | |
2430 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2431 | &bar_data, sizeof(bar_data))) | |
2432 | return RX_DROP_MONITOR; | |
2433 | ||
8ae5977f | 2434 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2435 | |
2436 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2437 | if (!tid_agg_rx) | |
a02ae758 | 2438 | return RX_DROP_MONITOR; |
71364716 | 2439 | |
8ae5977f | 2440 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2441 | |
2442 | /* reset session timer */ | |
20ad19d0 JB |
2443 | if (tid_agg_rx->timeout) |
2444 | mod_timer(&tid_agg_rx->session_timer, | |
2445 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2446 | |
dd318575 | 2447 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2448 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2449 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2450 | start_seq_num, frames); |
dd318575 JB |
2451 | spin_unlock(&tid_agg_rx->reorder_lock); |
2452 | ||
a02ae758 JB |
2453 | kfree_skb(skb); |
2454 | return RX_QUEUED; | |
71364716 RR |
2455 | } |
2456 | ||
08daecae JB |
2457 | /* |
2458 | * After this point, we only want management frames, | |
2459 | * so we can drop all remaining control frames to | |
2460 | * cooked monitor interfaces. | |
2461 | */ | |
2462 | return RX_DROP_MONITOR; | |
71364716 RR |
2463 | } |
2464 | ||
f4f727a6 JM |
2465 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2466 | struct ieee80211_mgmt *mgmt, | |
2467 | size_t len) | |
fea14732 JM |
2468 | { |
2469 | struct ieee80211_local *local = sdata->local; | |
2470 | struct sk_buff *skb; | |
2471 | struct ieee80211_mgmt *resp; | |
2472 | ||
b203ca39 | 2473 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2474 | /* Not to own unicast address */ |
2475 | return; | |
2476 | } | |
2477 | ||
b203ca39 JP |
2478 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2479 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2480 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2481 | return; |
2482 | } | |
2483 | ||
2484 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2485 | /* Too short SA Query request frame */ | |
2486 | return; | |
2487 | } | |
2488 | ||
2489 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2490 | if (skb == NULL) | |
2491 | return; | |
2492 | ||
2493 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2494 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2495 | memset(resp, 0, 24); | |
2496 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2497 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2498 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2499 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2500 | IEEE80211_STYPE_ACTION); | |
2501 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2502 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2503 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2504 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2505 | mgmt->u.action.u.sa_query.trans_id, | |
2506 | WLAN_SA_QUERY_TR_ID_LEN); | |
2507 | ||
62ae67be | 2508 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2509 | } |
2510 | ||
2e161f78 JB |
2511 | static ieee80211_rx_result debug_noinline |
2512 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2513 | { | |
2514 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2515 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2516 | |
2517 | /* | |
2518 | * From here on, look only at management frames. | |
2519 | * Data and control frames are already handled, | |
2520 | * and unknown (reserved) frames are useless. | |
2521 | */ | |
2522 | if (rx->skb->len < 24) | |
2523 | return RX_DROP_MONITOR; | |
2524 | ||
2525 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2526 | return RX_DROP_MONITOR; | |
2527 | ||
ee971924 JB |
2528 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2529 | ieee80211_is_beacon(mgmt->frame_control) && | |
2530 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2531 | int sig = 0; |
2532 | ||
2533 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2534 | sig = status->signal; | |
2535 | ||
ee971924 JB |
2536 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2537 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2538 | status->freq, sig); |
ee971924 JB |
2539 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2540 | } | |
2541 | ||
2e161f78 JB |
2542 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
2543 | return RX_DROP_UNUSABLE; | |
2544 | ||
2545 | return RX_CONTINUE; | |
2546 | } | |
2547 | ||
de1ede7a JB |
2548 | static ieee80211_rx_result debug_noinline |
2549 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2550 | { | |
2551 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2552 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2553 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2554 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2555 | int len = rx->skb->len; |
2556 | ||
2557 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2558 | return RX_CONTINUE; | |
2559 | ||
026331c4 JM |
2560 | /* drop too small frames */ |
2561 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2562 | return RX_DROP_UNUSABLE; |
de1ede7a | 2563 | |
815b8092 | 2564 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2565 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2566 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2567 | return RX_DROP_UNUSABLE; |
de1ede7a | 2568 | |
de1ede7a | 2569 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2570 | case WLAN_CATEGORY_HT: |
2571 | /* reject HT action frames from stations not supporting HT */ | |
2572 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2573 | goto invalid; | |
2574 | ||
2575 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2576 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2577 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2578 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2579 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2580 | break; | |
2581 | ||
ec61cd63 | 2582 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2583 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2584 | goto invalid; | |
2585 | ||
2586 | switch (mgmt->u.action.u.ht_smps.action) { | |
2587 | case WLAN_HT_ACTION_SMPS: { | |
2588 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2589 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2590 | |
2591 | /* convert to HT capability */ | |
2592 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2593 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2594 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2595 | break; |
2596 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2597 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2598 | break; |
2599 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2600 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2601 | break; |
2602 | default: | |
2603 | goto invalid; | |
2604 | } | |
1d8d3dec JB |
2605 | |
2606 | /* if no change do nothing */ | |
af0ed69b | 2607 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2608 | goto handled; |
af0ed69b | 2609 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2610 | |
2611 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2612 | ||
64f68e5d JB |
2613 | rate_control_rate_update(local, sband, rx->sta, |
2614 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2615 | goto handled; |
2616 | } | |
ec61cd63 JB |
2617 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2618 | struct ieee80211_supported_band *sband; | |
2619 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
1c45c5ce | 2620 | enum ieee80211_sta_rx_bandwidth max_bw, new_bw; |
ec61cd63 JB |
2621 | |
2622 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2623 | if (!(rx->sta->sta.ht_cap.cap & |
2624 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2625 | goto handled; |
2626 | ||
e1a0c6b3 | 2627 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
1c45c5ce | 2628 | max_bw = IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 2629 | else |
1c45c5ce EP |
2630 | max_bw = ieee80211_sta_cap_rx_bw(rx->sta); |
2631 | ||
2632 | /* set cur_max_bandwidth and recalc sta bw */ | |
2633 | rx->sta->cur_max_bandwidth = max_bw; | |
2634 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2635 | |
e1a0c6b3 | 2636 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2637 | goto handled; |
2638 | ||
1c45c5ce | 2639 | rx->sta->sta.bandwidth = new_bw; |
ec61cd63 JB |
2640 | sband = rx->local->hw.wiphy->bands[status->band]; |
2641 | ||
2642 | rate_control_rate_update(local, sband, rx->sta, | |
2643 | IEEE80211_RC_BW_CHANGED); | |
2644 | goto handled; | |
2645 | } | |
1d8d3dec JB |
2646 | default: |
2647 | goto invalid; | |
2648 | } | |
2649 | ||
0af83d3d | 2650 | break; |
1b3a2e49 JB |
2651 | case WLAN_CATEGORY_PUBLIC: |
2652 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2653 | goto invalid; | |
2654 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2655 | break; | |
2656 | if (!rx->sta) | |
2657 | break; | |
2658 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2659 | break; | |
2660 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2661 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2662 | break; | |
2663 | if (len < offsetof(struct ieee80211_mgmt, | |
2664 | u.action.u.ext_chan_switch.variable)) | |
2665 | goto invalid; | |
2666 | goto queue; | |
0af83d3d JB |
2667 | case WLAN_CATEGORY_VHT: |
2668 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2669 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2670 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2671 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2672 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2673 | break; | |
2674 | ||
2675 | /* verify action code is present */ | |
2676 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2677 | goto invalid; | |
2678 | ||
2679 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2680 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2681 | u8 opmode; | |
2682 | ||
2683 | /* verify opmode is present */ | |
2684 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2685 | goto invalid; | |
2686 | ||
2687 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2688 | ||
2689 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2690 | opmode, status->band, |
2691 | false); | |
0af83d3d JB |
2692 | goto handled; |
2693 | } | |
2694 | default: | |
2695 | break; | |
2696 | } | |
1d8d3dec | 2697 | break; |
de1ede7a | 2698 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2699 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2700 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2701 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2702 | sdata->vif.type != NL80211_IFTYPE_AP && |
2703 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2704 | break; |
8abd3f9b | 2705 | |
026331c4 JM |
2706 | /* verify action_code is present */ |
2707 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2708 | break; | |
2709 | ||
de1ede7a JB |
2710 | switch (mgmt->u.action.u.addba_req.action_code) { |
2711 | case WLAN_ACTION_ADDBA_REQ: | |
2712 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2713 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2714 | goto invalid; |
2715 | break; | |
de1ede7a JB |
2716 | case WLAN_ACTION_ADDBA_RESP: |
2717 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2718 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2719 | goto invalid; |
2720 | break; | |
de1ede7a JB |
2721 | case WLAN_ACTION_DELBA: |
2722 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2723 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2724 | goto invalid; |
2725 | break; | |
2726 | default: | |
2727 | goto invalid; | |
de1ede7a | 2728 | } |
bed7ee6e | 2729 | |
8b58ff83 | 2730 | goto queue; |
39192c0b | 2731 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2732 | /* verify action_code is present */ |
2733 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2734 | break; | |
2735 | ||
39192c0b JB |
2736 | switch (mgmt->u.action.u.measurement.action_code) { |
2737 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2738 | if (status->band != IEEE80211_BAND_5GHZ) |
2739 | break; | |
2740 | ||
39192c0b JB |
2741 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2742 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2743 | break; |
cd7760e6 SW |
2744 | |
2745 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2746 | break; | |
2747 | ||
39192c0b | 2748 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2749 | goto handled; |
cd7760e6 SW |
2750 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2751 | u8 *bssid; | |
2752 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2753 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2754 | break; |
cc32abd4 | 2755 | |
cd7760e6 | 2756 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2757 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2758 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2759 | break; |
2760 | ||
2761 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2762 | bssid = sdata->u.mgd.bssid; | |
2763 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2764 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2765 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2766 | bssid = mgmt->sa; | |
cd7760e6 SW |
2767 | else |
2768 | break; | |
2769 | ||
2770 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2771 | break; |
c481ec97 | 2772 | |
8b58ff83 | 2773 | goto queue; |
cd7760e6 | 2774 | } |
39192c0b JB |
2775 | } |
2776 | break; | |
fea14732 JM |
2777 | case WLAN_CATEGORY_SA_QUERY: |
2778 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2779 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2780 | break; |
2781 | ||
fea14732 JM |
2782 | switch (mgmt->u.action.u.sa_query.action) { |
2783 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2784 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2785 | break; |
fea14732 | 2786 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2787 | goto handled; |
fea14732 JM |
2788 | } |
2789 | break; | |
8db09850 | 2790 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2791 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2792 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2793 | break; | |
2794 | ||
8db09850 TP |
2795 | switch (mgmt->u.action.u.self_prot.action_code) { |
2796 | case WLAN_SP_MESH_PEERING_OPEN: | |
2797 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2798 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2799 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2800 | goto invalid; | |
a6dad6a2 | 2801 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2802 | /* userspace handles this frame */ |
2803 | break; | |
2804 | goto queue; | |
2805 | case WLAN_SP_MGK_INFORM: | |
2806 | case WLAN_SP_MGK_ACK: | |
2807 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2808 | goto invalid; | |
2809 | break; | |
2810 | } | |
2811 | break; | |
d3aaec8a | 2812 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2813 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2814 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2815 | break; | |
2816 | ||
77a121c3 JB |
2817 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2818 | break; | |
25d49e4d | 2819 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2820 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2821 | break; |
2822 | goto queue; | |
84040805 | 2823 | } |
026331c4 | 2824 | |
2e161f78 JB |
2825 | return RX_CONTINUE; |
2826 | ||
bed7ee6e | 2827 | invalid: |
554891e6 | 2828 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2829 | /* will return in the next handlers */ |
2830 | return RX_CONTINUE; | |
2831 | ||
2832 | handled: | |
2833 | if (rx->sta) | |
2834 | rx->sta->rx_packets++; | |
2835 | dev_kfree_skb(rx->skb); | |
2836 | return RX_QUEUED; | |
2837 | ||
2838 | queue: | |
2839 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2840 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2841 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2842 | if (rx->sta) | |
2843 | rx->sta->rx_packets++; | |
2844 | return RX_QUEUED; | |
2845 | } | |
2846 | ||
2847 | static ieee80211_rx_result debug_noinline | |
2848 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2849 | { | |
554891e6 | 2850 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2851 | int sig = 0; |
2e161f78 JB |
2852 | |
2853 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2854 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2855 | return RX_CONTINUE; |
d7907448 | 2856 | |
026331c4 JM |
2857 | /* |
2858 | * Getting here means the kernel doesn't know how to handle | |
2859 | * it, but maybe userspace does ... include returned frames | |
2860 | * so userspace can register for those to know whether ones | |
2861 | * it transmitted were processed or returned. | |
2862 | */ | |
026331c4 | 2863 | |
804483e9 JB |
2864 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2865 | sig = status->signal; | |
2866 | ||
71bbc994 | 2867 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2868 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 JB |
2869 | if (rx->sta) |
2870 | rx->sta->rx_packets++; | |
2871 | dev_kfree_skb(rx->skb); | |
2872 | return RX_QUEUED; | |
2873 | } | |
2874 | ||
2e161f78 JB |
2875 | return RX_CONTINUE; |
2876 | } | |
2877 | ||
2878 | static ieee80211_rx_result debug_noinline | |
2879 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2880 | { | |
2881 | struct ieee80211_local *local = rx->local; | |
2882 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2883 | struct sk_buff *nskb; | |
2884 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2885 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2886 | |
2887 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2888 | return RX_CONTINUE; | |
2889 | ||
2890 | /* | |
2891 | * For AP mode, hostapd is responsible for handling any action | |
2892 | * frames that we didn't handle, including returning unknown | |
2893 | * ones. For all other modes we will return them to the sender, | |
2894 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2895 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2896 | * Newer versions of hostapd shall also use the management frame |
2897 | * registration mechanisms, but older ones still use cooked | |
2898 | * monitor interfaces so push all frames there. | |
2899 | */ | |
554891e6 | 2900 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2901 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2902 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2903 | return RX_DROP_MONITOR; | |
026331c4 | 2904 | |
4b5ebccc JB |
2905 | if (is_multicast_ether_addr(mgmt->da)) |
2906 | return RX_DROP_MONITOR; | |
2907 | ||
84040805 JB |
2908 | /* do not return rejected action frames */ |
2909 | if (mgmt->u.action.category & 0x80) | |
2910 | return RX_DROP_UNUSABLE; | |
2911 | ||
2912 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2913 | GFP_ATOMIC); | |
2914 | if (nskb) { | |
292b4df6 | 2915 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2916 | |
292b4df6 JL |
2917 | nmgmt->u.action.category |= 0x80; |
2918 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2919 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2920 | |
2921 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2922 | ||
07e5a5f5 JB |
2923 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2924 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2925 | ||
2926 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2927 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2928 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2929 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2930 | info->hw_queue = | |
2931 | local->hw.offchannel_tx_hw_queue; | |
2932 | } | |
2933 | ||
2934 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2935 | status->band); | |
de1ede7a | 2936 | } |
39192c0b JB |
2937 | dev_kfree_skb(rx->skb); |
2938 | return RX_QUEUED; | |
de1ede7a JB |
2939 | } |
2940 | ||
49461622 | 2941 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2942 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2943 | { |
eb9fb5b8 | 2944 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2945 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2946 | __le16 stype; | |
571ecf67 | 2947 | |
77a121c3 | 2948 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2949 | |
77a121c3 JB |
2950 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2951 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 2952 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
2953 | sdata->vif.type != NL80211_IFTYPE_STATION) |
2954 | return RX_DROP_MONITOR; | |
472dbc45 | 2955 | |
77a121c3 | 2956 | switch (stype) { |
66e67e41 | 2957 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2958 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2959 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2960 | /* process for all: mesh, mlme, ibss */ | |
2961 | break; | |
66e67e41 JB |
2962 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2963 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2964 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2965 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2966 | if (is_multicast_ether_addr(mgmt->da) && |
2967 | !is_broadcast_ether_addr(mgmt->da)) | |
2968 | return RX_DROP_MONITOR; | |
2969 | ||
77a121c3 JB |
2970 | /* process only for station */ |
2971 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2972 | return RX_DROP_MONITOR; | |
2973 | break; | |
2974 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2975 | /* process only for ibss and mesh */ |
2976 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2977 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2978 | return RX_DROP_MONITOR; |
2979 | break; | |
2980 | default: | |
2981 | return RX_DROP_MONITOR; | |
2982 | } | |
f9d540ee | 2983 | |
77a121c3 | 2984 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2985 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2986 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2987 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2988 | if (rx->sta) |
2989 | rx->sta->rx_packets++; | |
46900298 | 2990 | |
77a121c3 | 2991 | return RX_QUEUED; |
571ecf67 JB |
2992 | } |
2993 | ||
5cf121c3 | 2994 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2995 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2996 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2997 | { |
2998 | struct ieee80211_sub_if_data *sdata; | |
2999 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
3000 | struct sk_buff *skb = rx->skb, *skb2; |
3001 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 3002 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 3003 | int needed_headroom; |
3d30d949 | 3004 | |
554891e6 JB |
3005 | /* |
3006 | * If cooked monitor has been processed already, then | |
3007 | * don't do it again. If not, set the flag. | |
3008 | */ | |
3009 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 3010 | goto out_free_skb; |
554891e6 | 3011 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 3012 | |
152c477a JB |
3013 | /* If there are no cooked monitor interfaces, just free the SKB */ |
3014 | if (!local->cooked_mntrs) | |
3015 | goto out_free_skb; | |
3016 | ||
1f7bba79 JB |
3017 | /* vendor data is long removed here */ |
3018 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 3019 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 3020 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 3021 | |
293702a3 JB |
3022 | if (skb_headroom(skb) < needed_headroom && |
3023 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
3024 | goto out_free_skb; | |
3d30d949 | 3025 | |
293702a3 | 3026 | /* prepend radiotap information */ |
973ef21a FF |
3027 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
3028 | false); | |
3d30d949 MW |
3029 | |
3030 | skb_set_mac_header(skb, 0); | |
3031 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3032 | skb->pkt_type = PACKET_OTHERHOST; | |
3033 | skb->protocol = htons(ETH_P_802_2); | |
3034 | ||
3035 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 3036 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
3037 | continue; |
3038 | ||
05c914fe | 3039 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
3040 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
3041 | continue; | |
3042 | ||
3043 | if (prev_dev) { | |
3044 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3045 | if (skb2) { | |
3046 | skb2->dev = prev_dev; | |
5548a8a1 | 3047 | netif_receive_skb(skb2); |
3d30d949 MW |
3048 | } |
3049 | } | |
3050 | ||
3051 | prev_dev = sdata->dev; | |
3052 | sdata->dev->stats.rx_packets++; | |
3053 | sdata->dev->stats.rx_bytes += skb->len; | |
3054 | } | |
3055 | ||
3056 | if (prev_dev) { | |
3057 | skb->dev = prev_dev; | |
5548a8a1 | 3058 | netif_receive_skb(skb); |
554891e6 JB |
3059 | return; |
3060 | } | |
3d30d949 MW |
3061 | |
3062 | out_free_skb: | |
3063 | dev_kfree_skb(skb); | |
3064 | } | |
3065 | ||
aa0c8636 CL |
3066 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3067 | ieee80211_rx_result res) | |
3068 | { | |
3069 | switch (res) { | |
3070 | case RX_DROP_MONITOR: | |
3071 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3072 | if (rx->sta) | |
3073 | rx->sta->rx_dropped++; | |
3074 | /* fall through */ | |
3075 | case RX_CONTINUE: { | |
3076 | struct ieee80211_rate *rate = NULL; | |
3077 | struct ieee80211_supported_band *sband; | |
3078 | struct ieee80211_rx_status *status; | |
3079 | ||
3080 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3081 | ||
3082 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3083 | if (!(status->flag & RX_FLAG_HT) && |
3084 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3085 | rate = &sband->bitrates[status->rate_idx]; |
3086 | ||
3087 | ieee80211_rx_cooked_monitor(rx, rate); | |
3088 | break; | |
3089 | } | |
3090 | case RX_DROP_UNUSABLE: | |
3091 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3092 | if (rx->sta) | |
3093 | rx->sta->rx_dropped++; | |
3094 | dev_kfree_skb(rx->skb); | |
3095 | break; | |
3096 | case RX_QUEUED: | |
3097 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3098 | break; | |
3099 | } | |
3100 | } | |
571ecf67 | 3101 | |
f9e124fb CL |
3102 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3103 | struct sk_buff_head *frames) | |
58905290 | 3104 | { |
58905290 | 3105 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3106 | struct sk_buff *skb; |
8944b79f | 3107 | |
e32f85f7 LCC |
3108 | #define CALL_RXH(rxh) \ |
3109 | do { \ | |
3110 | res = rxh(rx); \ | |
3111 | if (res != RX_CONTINUE) \ | |
2569a826 | 3112 | goto rxh_next; \ |
e32f85f7 | 3113 | } while (0); |
49461622 | 3114 | |
45ceeee8 JB |
3115 | /* Lock here to avoid hitting all of the data used in the RX |
3116 | * path (e.g. key data, station data, ...) concurrently when | |
3117 | * a frame is released from the reorder buffer due to timeout | |
3118 | * from the timer, potentially concurrently with RX from the | |
3119 | * driver. | |
3120 | */ | |
f9e124fb | 3121 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3122 | |
f9e124fb | 3123 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3124 | /* |
3125 | * all the other fields are valid across frames | |
3126 | * that belong to an aMPDU since they are on the | |
3127 | * same TID from the same station | |
3128 | */ | |
3129 | rx->skb = skb; | |
3130 | ||
2569a826 | 3131 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3132 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3133 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3134 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3135 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3136 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3137 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3138 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3139 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3140 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3141 | #endif |
2154c81c | 3142 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3143 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3144 | |
3145 | /* special treatment -- needs the queue */ | |
3146 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3147 | if (res != RX_CONTINUE) | |
3148 | goto rxh_next; | |
3149 | ||
2e161f78 | 3150 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3151 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3152 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3153 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3154 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3155 | |
aa0c8636 CL |
3156 | rxh_next: |
3157 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3158 | |
49461622 | 3159 | #undef CALL_RXH |
aa0c8636 | 3160 | } |
24a8fdad | 3161 | |
f9e124fb | 3162 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3163 | } |
3164 | ||
4406c376 | 3165 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3166 | { |
f9e124fb | 3167 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3168 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3169 | ||
f9e124fb CL |
3170 | __skb_queue_head_init(&reorder_release); |
3171 | ||
aa0c8636 CL |
3172 | #define CALL_RXH(rxh) \ |
3173 | do { \ | |
3174 | res = rxh(rx); \ | |
3175 | if (res != RX_CONTINUE) \ | |
3176 | goto rxh_next; \ | |
3177 | } while (0); | |
3178 | ||
0395442a | 3179 | CALL_RXH(ieee80211_rx_h_check_dup) |
aa0c8636 CL |
3180 | CALL_RXH(ieee80211_rx_h_check) |
3181 | ||
f9e124fb | 3182 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3183 | |
f9e124fb | 3184 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3185 | return; |
49461622 | 3186 | |
2569a826 | 3187 | rxh_next: |
aa0c8636 CL |
3188 | ieee80211_rx_handlers_result(rx, res); |
3189 | ||
3190 | #undef CALL_RXH | |
58905290 JB |
3191 | } |
3192 | ||
2bff8ebf | 3193 | /* |
dd318575 JB |
3194 | * This function makes calls into the RX path, therefore |
3195 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3196 | */ |
3197 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3198 | { | |
f9e124fb | 3199 | struct sk_buff_head frames; |
554891e6 JB |
3200 | struct ieee80211_rx_data rx = { |
3201 | .sta = sta, | |
3202 | .sdata = sta->sdata, | |
3203 | .local = sta->local, | |
9e26297a JB |
3204 | /* This is OK -- must be QoS data frame */ |
3205 | .security_idx = tid, | |
3206 | .seqno_idx = tid, | |
fcf8bd3b | 3207 | .flags = 0, |
554891e6 | 3208 | }; |
2c15a0cf CL |
3209 | struct tid_ampdu_rx *tid_agg_rx; |
3210 | ||
3211 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3212 | if (!tid_agg_rx) | |
3213 | return; | |
2bff8ebf | 3214 | |
f9e124fb CL |
3215 | __skb_queue_head_init(&frames); |
3216 | ||
2c15a0cf | 3217 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3218 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3219 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3220 | |
f9e124fb | 3221 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3222 | } |
3223 | ||
571ecf67 JB |
3224 | /* main receive path */ |
3225 | ||
3c2723f5 JB |
3226 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3227 | struct ieee80211_hdr *hdr) | |
23a24def | 3228 | { |
20b01f80 | 3229 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3230 | struct sk_buff *skb = rx->skb; |
3231 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3232 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3233 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3234 | ||
51fb61e7 | 3235 | switch (sdata->vif.type) { |
05c914fe | 3236 | case NL80211_IFTYPE_STATION: |
9bc383de | 3237 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3238 | return false; |
77fdaa12 | 3239 | if (!multicast && |
df140465 JB |
3240 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3241 | return false; | |
23a24def | 3242 | break; |
05c914fe | 3243 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3244 | if (!bssid) |
3c2723f5 | 3245 | return false; |
6329b8d9 FF |
3246 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3247 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3248 | return false; |
a7767f95 | 3249 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3250 | return true; |
d48b2968 | 3251 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3252 | return false; |
23a24def | 3253 | } else if (!multicast && |
b203ca39 | 3254 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
df140465 | 3255 | return false; |
0fb8ca45 JM |
3256 | } else if (!rx->sta) { |
3257 | int rate_idx; | |
5614618e JB |
3258 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3259 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3260 | else |
eb9fb5b8 | 3261 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3262 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3263 | BIT(rate_idx)); | |
0fb8ca45 | 3264 | } |
23a24def | 3265 | break; |
239281f8 RL |
3266 | case NL80211_IFTYPE_OCB: |
3267 | if (!bssid) | |
3268 | return false; | |
3269 | if (ieee80211_is_beacon(hdr->frame_control)) { | |
3270 | return false; | |
3271 | } else if (!is_broadcast_ether_addr(bssid)) { | |
3272 | ocb_dbg(sdata, "BSSID mismatch in OCB mode!\n"); | |
3273 | return false; | |
3274 | } else if (!multicast && | |
3275 | !ether_addr_equal(sdata->dev->dev_addr, | |
3276 | hdr->addr1)) { | |
df140465 | 3277 | return false; |
239281f8 RL |
3278 | } else if (!rx->sta) { |
3279 | int rate_idx; | |
3280 | if (status->flag & RX_FLAG_HT) | |
3281 | rate_idx = 0; /* TODO: HT rates */ | |
3282 | else | |
3283 | rate_idx = status->rate_idx; | |
3284 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3285 | BIT(rate_idx)); | |
3286 | } | |
3287 | break; | |
05c914fe | 3288 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3289 | if (!multicast && |
df140465 JB |
3290 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3291 | return false; | |
6032f934 | 3292 | break; |
05c914fe JB |
3293 | case NL80211_IFTYPE_AP_VLAN: |
3294 | case NL80211_IFTYPE_AP: | |
23a24def | 3295 | if (!bssid) { |
b203ca39 | 3296 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3297 | return false; |
f142c6b9 | 3298 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3299 | /* |
3300 | * Accept public action frames even when the | |
3301 | * BSSID doesn't match, this is used for P2P | |
3302 | * and location updates. Note that mac80211 | |
3303 | * itself never looks at these frames. | |
3304 | */ | |
2b9ccd4e JB |
3305 | if (!multicast && |
3306 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3307 | return false; |
d48b2968 | 3308 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3309 | return true; |
5c90067c | 3310 | return ieee80211_is_beacon(hdr->frame_control); |
db8e1732 AN |
3311 | } else if (!ieee80211_has_tods(hdr->frame_control)) { |
3312 | /* ignore data frames to TDLS-peers */ | |
3313 | if (ieee80211_is_data(hdr->frame_control)) | |
3314 | return false; | |
3315 | /* ignore action frames to TDLS-peers */ | |
3316 | if (ieee80211_is_action(hdr->frame_control) && | |
3317 | !ether_addr_equal(bssid, hdr->addr1)) | |
3318 | return false; | |
23a24def | 3319 | } |
23a24def | 3320 | break; |
05c914fe | 3321 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3322 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3323 | return false; |
b203ca39 | 3324 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
3c2723f5 | 3325 | return false; |
23a24def | 3326 | break; |
f142c6b9 JB |
3327 | case NL80211_IFTYPE_P2P_DEVICE: |
3328 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3329 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3330 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3331 | !ieee80211_is_beacon(hdr->frame_control)) | |
3c2723f5 | 3332 | return false; |
f142c6b9 | 3333 | break; |
2ca27bcf | 3334 | default: |
fb1c1cd6 | 3335 | /* should never get here */ |
f142c6b9 | 3336 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3337 | break; |
23a24def JB |
3338 | } |
3339 | ||
3c2723f5 | 3340 | return true; |
23a24def JB |
3341 | } |
3342 | ||
4406c376 JB |
3343 | /* |
3344 | * This function returns whether or not the SKB | |
3345 | * was destined for RX processing or not, which, | |
3346 | * if consume is true, is equivalent to whether | |
3347 | * or not the skb was consumed. | |
3348 | */ | |
3349 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3350 | struct sk_buff *skb, bool consume) | |
3351 | { | |
3352 | struct ieee80211_local *local = rx->local; | |
3353 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
4406c376 | 3354 | struct ieee80211_hdr *hdr = (void *)skb->data; |
4406c376 JB |
3355 | |
3356 | rx->skb = skb; | |
4406c376 | 3357 | |
40791942 | 3358 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3359 | return false; |
3360 | ||
4406c376 JB |
3361 | if (!consume) { |
3362 | skb = skb_copy(skb, GFP_ATOMIC); | |
3363 | if (!skb) { | |
3364 | if (net_ratelimit()) | |
3365 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3366 | "failed to copy skb for %s\n", |
4406c376 JB |
3367 | sdata->name); |
3368 | return true; | |
3369 | } | |
3370 | ||
3371 | rx->skb = skb; | |
3372 | } | |
3373 | ||
3374 | ieee80211_invoke_rx_handlers(rx); | |
3375 | return true; | |
3376 | } | |
3377 | ||
571ecf67 | 3378 | /* |
6b59db7d | 3379 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3380 | * be called with rcu_read_lock protection. |
571ecf67 | 3381 | */ |
71ebb4aa | 3382 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3383 | struct sk_buff *skb) |
571ecf67 JB |
3384 | { |
3385 | struct ieee80211_local *local = hw_to_local(hw); | |
3386 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3387 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3388 | __le16 fc; |
5cf121c3 | 3389 | struct ieee80211_rx_data rx; |
4406c376 | 3390 | struct ieee80211_sub_if_data *prev; |
7bedd0cf JB |
3391 | struct sta_info *sta, *prev_sta; |
3392 | struct rhash_head *tmp; | |
e3cf8b3f | 3393 | int err = 0; |
571ecf67 | 3394 | |
e3cf8b3f | 3395 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3396 | memset(&rx, 0, sizeof(rx)); |
3397 | rx.skb = skb; | |
3398 | rx.local = local; | |
72abd81b | 3399 | |
e3cf8b3f | 3400 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3401 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3402 | |
4a4f1a58 JB |
3403 | if (ieee80211_is_mgmt(fc)) { |
3404 | /* drop frame if too short for header */ | |
3405 | if (skb->len < ieee80211_hdrlen(fc)) | |
3406 | err = -ENOBUFS; | |
3407 | else | |
3408 | err = skb_linearize(skb); | |
3409 | } else { | |
e3cf8b3f | 3410 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3411 | } |
e3cf8b3f ZY |
3412 | |
3413 | if (err) { | |
3414 | dev_kfree_skb(skb); | |
3415 | return; | |
3416 | } | |
3417 | ||
3418 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3419 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3420 | ieee80211_verify_alignment(&rx); |
38f3714d | 3421 | |
d48b2968 JB |
3422 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3423 | ieee80211_is_beacon(hdr->frame_control))) | |
3424 | ieee80211_scan_rx(local, skb); | |
3425 | ||
e3cf8b3f | 3426 | if (ieee80211_is_data(fc)) { |
7bedd0cf JB |
3427 | const struct bucket_table *tbl; |
3428 | ||
56af3268 | 3429 | prev_sta = NULL; |
4406c376 | 3430 | |
7bedd0cf JB |
3431 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); |
3432 | ||
3433 | for_each_sta_info(local, tbl, hdr->addr2, sta, tmp) { | |
56af3268 BG |
3434 | if (!prev_sta) { |
3435 | prev_sta = sta; | |
3436 | continue; | |
3437 | } | |
3438 | ||
3439 | rx.sta = prev_sta; | |
3440 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3441 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3442 | |
56af3268 | 3443 | prev_sta = sta; |
4406c376 | 3444 | } |
56af3268 BG |
3445 | |
3446 | if (prev_sta) { | |
3447 | rx.sta = prev_sta; | |
3448 | rx.sdata = prev_sta->sdata; | |
3449 | ||
4406c376 | 3450 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3451 | return; |
8e26d5ad | 3452 | goto out; |
56af3268 | 3453 | } |
4406c376 JB |
3454 | } |
3455 | ||
4b0dd98e | 3456 | prev = NULL; |
b2e7771e | 3457 | |
4b0dd98e JB |
3458 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3459 | if (!ieee80211_sdata_running(sdata)) | |
3460 | continue; | |
340e11f3 | 3461 | |
4b0dd98e JB |
3462 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3463 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3464 | continue; | |
340e11f3 | 3465 | |
4b0dd98e JB |
3466 | /* |
3467 | * frame is destined for this interface, but if it's | |
3468 | * not also for the previous one we handle that after | |
3469 | * the loop to avoid copying the SKB once too much | |
3470 | */ | |
4bb29f8c | 3471 | |
4b0dd98e | 3472 | if (!prev) { |
abe60632 | 3473 | prev = sdata; |
4b0dd98e | 3474 | continue; |
340e11f3 | 3475 | } |
4bb29f8c | 3476 | |
7852e361 | 3477 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3478 | rx.sdata = prev; |
3479 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3480 | |
4b0dd98e JB |
3481 | prev = sdata; |
3482 | } | |
3483 | ||
3484 | if (prev) { | |
7852e361 | 3485 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3486 | rx.sdata = prev; |
4406c376 | 3487 | |
4b0dd98e JB |
3488 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3489 | return; | |
571ecf67 | 3490 | } |
4406c376 | 3491 | |
8e26d5ad | 3492 | out: |
4406c376 | 3493 | dev_kfree_skb(skb); |
571ecf67 | 3494 | } |
6368e4b1 RR |
3495 | |
3496 | /* | |
3497 | * This is the receive path handler. It is called by a low level driver when an | |
3498 | * 802.11 MPDU is received from the hardware. | |
3499 | */ | |
103bf9f7 | 3500 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3501 | { |
3502 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3503 | struct ieee80211_rate *rate = NULL; |
3504 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3505 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3506 | |
d20ef63d JB |
3507 | WARN_ON_ONCE(softirq_count() == 0); |
3508 | ||
444e3803 | 3509 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3510 | goto drop; |
8318d78a JB |
3511 | |
3512 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3513 | if (WARN_ON(!sband)) |
3514 | goto drop; | |
8318d78a | 3515 | |
89c3a8ac JB |
3516 | /* |
3517 | * If we're suspending, it is possible although not too likely | |
3518 | * that we'd be receiving frames after having already partially | |
3519 | * quiesced the stack. We can't process such frames then since | |
3520 | * that might, for example, cause stations to be added or other | |
3521 | * driver callbacks be invoked. | |
3522 | */ | |
77a980dc JB |
3523 | if (unlikely(local->quiescing || local->suspended)) |
3524 | goto drop; | |
89c3a8ac | 3525 | |
04800ada AN |
3526 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3527 | if (unlikely(local->in_reconfig)) | |
3528 | goto drop; | |
3529 | ||
ea77f12f JB |
3530 | /* |
3531 | * The same happens when we're not even started, | |
3532 | * but that's worth a warning. | |
3533 | */ | |
77a980dc JB |
3534 | if (WARN_ON(!local->started)) |
3535 | goto drop; | |
ea77f12f | 3536 | |
fc885189 | 3537 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3538 | /* |
fc885189 JB |
3539 | * Validate the rate, unless a PLCP error means that |
3540 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3541 | */ |
fc885189 JB |
3542 | |
3543 | if (status->flag & RX_FLAG_HT) { | |
3544 | /* | |
3545 | * rate_idx is MCS index, which can be [0-76] | |
3546 | * as documented on: | |
3547 | * | |
3548 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3549 | * | |
3550 | * Anything else would be some sort of driver or | |
3551 | * hardware error. The driver should catch hardware | |
3552 | * errors. | |
3553 | */ | |
444e3803 | 3554 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3555 | "Rate marked as an HT rate but passed " |
3556 | "status->rate_idx is not " | |
3557 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3558 | status->rate_idx, | |
3559 | status->rate_idx)) | |
3560 | goto drop; | |
5614618e JB |
3561 | } else if (status->flag & RX_FLAG_VHT) { |
3562 | if (WARN_ONCE(status->rate_idx > 9 || | |
3563 | !status->vht_nss || | |
3564 | status->vht_nss > 8, | |
3565 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3566 | status->rate_idx, status->vht_nss)) | |
3567 | goto drop; | |
fc885189 | 3568 | } else { |
444e3803 | 3569 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3570 | goto drop; |
3571 | rate = &sband->bitrates[status->rate_idx]; | |
3572 | } | |
0fb8ca45 | 3573 | } |
6368e4b1 | 3574 | |
554891e6 JB |
3575 | status->rx_flags = 0; |
3576 | ||
6368e4b1 RR |
3577 | /* |
3578 | * key references and virtual interfaces are protected using RCU | |
3579 | * and this requires that we are in a read-side RCU section during | |
3580 | * receive processing | |
3581 | */ | |
3582 | rcu_read_lock(); | |
3583 | ||
3584 | /* | |
3585 | * Frames with failed FCS/PLCP checksum are not returned, | |
3586 | * all other frames are returned without radiotap header | |
3587 | * if it was previously present. | |
3588 | * Also, frames with less than 16 bytes are dropped. | |
3589 | */ | |
f1d58c25 | 3590 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3591 | if (!skb) { |
3592 | rcu_read_unlock(); | |
3593 | return; | |
3594 | } | |
3595 | ||
e1e54068 JB |
3596 | ieee80211_tpt_led_trig_rx(local, |
3597 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3598 | skb->len); | |
071d9ac2 | 3599 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3600 | |
3601 | rcu_read_unlock(); | |
77a980dc JB |
3602 | |
3603 | return; | |
3604 | drop: | |
3605 | kfree_skb(skb); | |
6368e4b1 | 3606 | } |
103bf9f7 | 3607 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3608 | |
3609 | /* This is a version of the rx handler that can be called from hard irq | |
3610 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3611 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3612 | { |
3613 | struct ieee80211_local *local = hw_to_local(hw); | |
3614 | ||
3615 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3616 | ||
571ecf67 JB |
3617 | skb->pkt_type = IEEE80211_RX_MSG; |
3618 | skb_queue_tail(&local->skb_queue, skb); | |
3619 | tasklet_schedule(&local->tasklet); | |
3620 | } | |
3621 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |