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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
571ecf67 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
ab46623e | 13 | #include <linux/jiffies.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
571ecf67 JB |
15 | #include <linux/kernel.h> |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/etherdevice.h> | |
d4e46a3d | 19 | #include <linux/rcupdate.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
571ecf67 JB |
21 | #include <net/mac80211.h> |
22 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 23 | #include <asm/unaligned.h> |
571ecf67 JB |
24 | |
25 | #include "ieee80211_i.h" | |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 | 27 | #include "led.h" |
33b64eb2 | 28 | #include "mesh.h" |
571ecf67 JB |
29 | #include "wep.h" |
30 | #include "wpa.h" | |
31 | #include "tkip.h" | |
32 | #include "wme.h" | |
1d8d3dec | 33 | #include "rate.h" |
571ecf67 | 34 | |
b2e7771e JB |
35 | /* |
36 | * monitor mode reception | |
37 | * | |
38 | * This function cleans up the SKB, i.e. it removes all the stuff | |
39 | * only useful for monitoring. | |
40 | */ | |
41 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
1f7bba79 JB |
42 | struct sk_buff *skb, |
43 | unsigned int rtap_vendor_space) | |
b2e7771e | 44 | { |
b2e7771e JB |
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
46 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
48 | else { |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
0624760c | 52 | return NULL; |
b2e7771e JB |
53 | } |
54 | } | |
55 | ||
1f7bba79 JB |
56 | __pskb_pull(skb, rtap_vendor_space); |
57 | ||
b2e7771e JB |
58 | return skb; |
59 | } | |
60 | ||
1f7bba79 JB |
61 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, |
62 | unsigned int rtap_vendor_space) | |
b2e7771e | 63 | { |
f1d58c25 | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1f7bba79 JB |
65 | struct ieee80211_hdr *hdr; |
66 | ||
67 | hdr = (void *)(skb->data + rtap_vendor_space); | |
b2e7771e | 68 | |
4c298677 JB |
69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
70 | RX_FLAG_FAILED_PLCP_CRC | | |
71 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
6b59db7d ZG |
72 | return true; |
73 | ||
1f7bba79 | 74 | if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) |
6b59db7d ZG |
75 | return true; |
76 | ||
87228f57 HH |
77 | if (ieee80211_is_ctl(hdr->frame_control) && |
78 | !ieee80211_is_pspoll(hdr->frame_control) && | |
79 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
80 | return true; |
81 | ||
82 | return false; | |
b2e7771e JB |
83 | } |
84 | ||
601ae7f2 | 85 | static int |
1f7bba79 JB |
86 | ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, |
87 | struct ieee80211_rx_status *status, | |
88 | struct sk_buff *skb) | |
601ae7f2 BR |
89 | { |
90 | int len; | |
91 | ||
92 | /* always present fields */ | |
a144f378 | 93 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 94 | |
a144f378 | 95 | /* allocate extra bitmaps */ |
a144f378 JB |
96 | if (status->chains) |
97 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
98 | |
99 | if (ieee80211_have_rx_timestamp(status)) { | |
100 | len = ALIGN(len, 8); | |
601ae7f2 | 101 | len += 8; |
90b9e446 | 102 | } |
7fee5372 | 103 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 104 | len += 1; |
601ae7f2 | 105 | |
a144f378 JB |
106 | /* antenna field, if we don't have per-chain info */ |
107 | if (!status->chains) | |
108 | len += 1; | |
109 | ||
90b9e446 JB |
110 | /* padding for RX_FLAGS if necessary */ |
111 | len = ALIGN(len, 2); | |
601ae7f2 | 112 | |
6d744bac JB |
113 | if (status->flag & RX_FLAG_HT) /* HT info */ |
114 | len += 3; | |
115 | ||
4c298677 | 116 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 117 | len = ALIGN(len, 4); |
4c298677 JB |
118 | len += 8; |
119 | } | |
120 | ||
51648921 JB |
121 | if (status->flag & RX_FLAG_VHT) { |
122 | len = ALIGN(len, 2); | |
123 | len += 12; | |
124 | } | |
125 | ||
a144f378 JB |
126 | if (status->chains) { |
127 | /* antenna and antenna signal fields */ | |
128 | len += 2 * hweight8(status->chains); | |
129 | } | |
130 | ||
1f7bba79 JB |
131 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
132 | struct ieee80211_vendor_radiotap *rtap = (void *)skb->data; | |
133 | ||
134 | /* vendor presence bitmap */ | |
135 | len += 4; | |
136 | /* alignment for fixed 6-byte vendor data header */ | |
137 | len = ALIGN(len, 2); | |
138 | /* vendor data header */ | |
139 | len += 6; | |
140 | if (WARN_ON(rtap->align == 0)) | |
141 | rtap->align = 1; | |
142 | len = ALIGN(len, rtap->align); | |
143 | len += rtap->len + rtap->pad; | |
144 | } | |
145 | ||
601ae7f2 BR |
146 | return len; |
147 | } | |
148 | ||
00ea6deb | 149 | /* |
601ae7f2 BR |
150 | * ieee80211_add_rx_radiotap_header - add radiotap header |
151 | * | |
152 | * add a radiotap header containing all the fields which the hardware provided. | |
153 | */ | |
154 | static void | |
155 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
156 | struct sk_buff *skb, | |
601ae7f2 | 157 | struct ieee80211_rate *rate, |
973ef21a | 158 | int rtap_len, bool has_fcs) |
601ae7f2 | 159 | { |
f1d58c25 | 160 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
161 | struct ieee80211_radiotap_header *rthdr; |
162 | unsigned char *pos; | |
a144f378 JB |
163 | __le32 *it_present; |
164 | u32 it_present_val; | |
6a86b9c7 | 165 | u16 rx_flags = 0; |
a5e70697 | 166 | u16 channel_flags = 0; |
a144f378 JB |
167 | int mpdulen, chain; |
168 | unsigned long chains = status->chains; | |
1f7bba79 JB |
169 | struct ieee80211_vendor_radiotap rtap = {}; |
170 | ||
171 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
172 | rtap = *(struct ieee80211_vendor_radiotap *)skb->data; | |
173 | /* rtap.len and rtap.pad are undone immediately */ | |
174 | skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad); | |
175 | } | |
f4bda337 TP |
176 | |
177 | mpdulen = skb->len; | |
178 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
179 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
180 | |
181 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
1f7bba79 | 182 | memset(rthdr, 0, rtap_len - rtap.len - rtap.pad); |
a144f378 | 183 | it_present = &rthdr->it_present; |
601ae7f2 BR |
184 | |
185 | /* radiotap header, set always present flags */ | |
0059b2b1 | 186 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
187 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
188 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
189 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
190 | ||
191 | if (!status->chains) | |
192 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
193 | ||
194 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
195 | it_present_val |= | |
196 | BIT(IEEE80211_RADIOTAP_EXT) | | |
197 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
198 | put_unaligned_le32(it_present_val, it_present); | |
199 | it_present++; | |
200 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
201 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
202 | } | |
601ae7f2 | 203 | |
1f7bba79 JB |
204 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
205 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | | |
206 | BIT(IEEE80211_RADIOTAP_EXT); | |
207 | put_unaligned_le32(it_present_val, it_present); | |
208 | it_present++; | |
209 | it_present_val = rtap.present; | |
210 | } | |
211 | ||
a144f378 JB |
212 | put_unaligned_le32(it_present_val, it_present); |
213 | ||
214 | pos = (void *)(it_present + 1); | |
215 | ||
601ae7f2 BR |
216 | /* the order of the following fields is important */ |
217 | ||
218 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 219 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
220 | /* padding */ |
221 | while ((pos - (u8 *)rthdr) & 7) | |
222 | *pos++ = 0; | |
f4bda337 TP |
223 | put_unaligned_le64( |
224 | ieee80211_calculate_rx_timestamp(local, status, | |
225 | mpdulen, 0), | |
226 | pos); | |
1df332e8 | 227 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
228 | pos += 8; |
229 | } | |
230 | ||
231 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 232 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 233 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
234 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
235 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
236 | if (status->flag & RX_FLAG_SHORTPRE) |
237 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
238 | pos++; |
239 | ||
240 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 241 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 242 | /* |
f8d1ccf1 | 243 | * Without rate information don't add it. If we have, |
38f37be2 | 244 | * MCS information is a separate field in radiotap, |
73b48099 JB |
245 | * added below. The byte here is needed as padding |
246 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
247 | */ |
248 | *pos = 0; | |
8d6f658e | 249 | } else { |
2103dec1 | 250 | int shift = 0; |
ebe6c7ba | 251 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
252 | if (status->flag & RX_FLAG_10MHZ) |
253 | shift = 1; | |
254 | else if (status->flag & RX_FLAG_5MHZ) | |
255 | shift = 2; | |
256 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 257 | } |
601ae7f2 BR |
258 | pos++; |
259 | ||
260 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 261 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 262 | pos += 2; |
a5e70697 SW |
263 | if (status->flag & RX_FLAG_10MHZ) |
264 | channel_flags |= IEEE80211_CHAN_HALF; | |
265 | else if (status->flag & RX_FLAG_5MHZ) | |
266 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
267 | ||
601ae7f2 | 268 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 269 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 270 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 271 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 272 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 273 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 274 | else if (rate) |
a5e70697 | 275 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 276 | else |
a5e70697 SW |
277 | channel_flags |= IEEE80211_CHAN_2GHZ; |
278 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
279 | pos += 2; |
280 | ||
281 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
282 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
283 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
284 | *pos = status->signal; |
285 | rthdr->it_present |= | |
286 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
287 | pos++; | |
288 | } | |
289 | ||
601ae7f2 BR |
290 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
291 | ||
a144f378 JB |
292 | if (!status->chains) { |
293 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
294 | *pos = status->antenna; | |
295 | pos++; | |
296 | } | |
601ae7f2 | 297 | |
601ae7f2 BR |
298 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
299 | ||
300 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
301 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 302 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 303 | *pos++ = 0; |
aae89831 | 304 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
305 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
306 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 307 | pos += 2; |
6d744bac JB |
308 | |
309 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
310 | unsigned int stbc; |
311 | ||
6d744bac | 312 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 313 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
314 | *pos = 0; |
315 | if (status->flag & RX_FLAG_SHORT_GI) | |
316 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
317 | if (status->flag & RX_FLAG_40MHZ) | |
318 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
319 | if (status->flag & RX_FLAG_HT_GF) |
320 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
321 | if (status->flag & RX_FLAG_LDPC) |
322 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
323 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
324 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
325 | pos++; |
326 | *pos++ = status->rate_idx; | |
327 | } | |
4c298677 JB |
328 | |
329 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
330 | u16 flags = 0; | |
331 | ||
332 | /* ensure 4 byte alignment */ | |
333 | while ((pos - (u8 *)rthdr) & 3) | |
334 | pos++; | |
335 | rthdr->it_present |= | |
336 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
337 | put_unaligned_le32(status->ampdu_reference, pos); | |
338 | pos += 4; | |
339 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
340 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
341 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
342 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
343 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
344 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
345 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
346 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
347 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
348 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
349 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
350 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
351 | put_unaligned_le16(flags, pos); | |
352 | pos += 2; | |
353 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
354 | *pos++ = status->ampdu_delimiter_crc; | |
355 | else | |
356 | *pos++ = 0; | |
357 | *pos++ = 0; | |
358 | } | |
90b9e446 | 359 | |
51648921 JB |
360 | if (status->flag & RX_FLAG_VHT) { |
361 | u16 known = local->hw.radiotap_vht_details; | |
362 | ||
363 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
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; | |
650 | ||
1df332e8 | 651 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
652 | return -1; |
653 | ||
d8ca16db | 654 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
655 | return -1; /* not a robust management frame */ |
656 | ||
657 | mmie = (struct ieee80211_mmie *) | |
658 | (skb->data + skb->len - sizeof(*mmie)); | |
659 | if (mmie->element_id != WLAN_EID_MMIE || | |
660 | mmie->length != sizeof(*mmie) - 2) | |
661 | return -1; | |
662 | ||
663 | return le16_to_cpu(mmie->key_id); | |
664 | } | |
665 | ||
2475b1cc MS |
666 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
667 | struct sk_buff *skb) | |
668 | { | |
669 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
670 | __le16 fc; | |
671 | int hdrlen; | |
672 | u8 keyid; | |
673 | ||
674 | fc = hdr->frame_control; | |
675 | hdrlen = ieee80211_hdrlen(fc); | |
676 | ||
677 | if (skb->len < hdrlen + cs->hdr_len) | |
678 | return -EINVAL; | |
679 | ||
680 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
681 | keyid &= cs->key_idx_mask; | |
682 | keyid >>= cs->key_idx_shift; | |
683 | ||
684 | return keyid; | |
685 | } | |
686 | ||
1df332e8 | 687 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 688 | { |
a7767f95 | 689 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 690 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 691 | |
a7767f95 | 692 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
693 | if (is_multicast_ether_addr(hdr->addr1)) { |
694 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 695 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 696 | return RX_DROP_MONITOR; |
b203ca39 | 697 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
698 | return RX_DROP_MONITOR; |
699 | } else { | |
700 | if (!ieee80211_has_a4(hdr->frame_control)) | |
701 | return RX_DROP_MONITOR; | |
b203ca39 | 702 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
703 | return RX_DROP_MONITOR; |
704 | } | |
33b64eb2 LCC |
705 | } |
706 | ||
707 | /* If there is not an established peer link and this is not a peer link | |
708 | * establisment frame, beacon or probe, drop the frame. | |
709 | */ | |
710 | ||
57cf8043 | 711 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 712 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 713 | |
a7767f95 | 714 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
715 | return RX_DROP_MONITOR; |
716 | ||
a7767f95 | 717 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 718 | u8 category; |
9b395bc3 JB |
719 | |
720 | /* make sure category field is present */ | |
721 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
722 | return RX_DROP_MONITOR; | |
723 | ||
33b64eb2 | 724 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
725 | category = mgmt->u.action.category; |
726 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 727 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 728 | return RX_DROP_MONITOR; |
33b64eb2 | 729 | return RX_CONTINUE; |
33b64eb2 LCC |
730 | } |
731 | ||
a7767f95 HH |
732 | if (ieee80211_is_probe_req(hdr->frame_control) || |
733 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
734 | ieee80211_is_beacon(hdr->frame_control) || |
735 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
736 | return RX_CONTINUE; |
737 | ||
738 | return RX_DROP_MONITOR; | |
a7767f95 HH |
739 | } |
740 | ||
902acc78 JB |
741 | return RX_CONTINUE; |
742 | } | |
33b64eb2 | 743 | |
d3b2fb53 | 744 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 745 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
746 | int index, |
747 | struct sk_buff_head *frames) | |
1edfb1af | 748 | { |
83eb935e MK |
749 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
750 | struct sk_buff *skb; | |
4cfda47b | 751 | struct ieee80211_rx_status *status; |
1edfb1af | 752 | |
dd318575 JB |
753 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
754 | ||
83eb935e | 755 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
756 | goto no_frame; |
757 | ||
83eb935e MK |
758 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
759 | __skb_queue_purge(skb_list); | |
760 | goto no_frame; | |
761 | } | |
762 | ||
763 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 764 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
765 | while ((skb = __skb_dequeue(skb_list))) { |
766 | status = IEEE80211_SKB_RXCB(skb); | |
767 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
768 | __skb_queue_tail(frames, skb); | |
769 | } | |
1edfb1af JB |
770 | |
771 | no_frame: | |
9a886586 | 772 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
773 | } |
774 | ||
d3b2fb53 | 775 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 776 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
777 | u16 head_seq_num, |
778 | struct sk_buff_head *frames) | |
1edfb1af JB |
779 | { |
780 | int index; | |
781 | ||
dd318575 JB |
782 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
783 | ||
9a886586 | 784 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 785 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
786 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
787 | frames); | |
1edfb1af JB |
788 | } |
789 | } | |
790 | ||
791 | /* | |
792 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
793 | * the skb was added to the buffer longer than this time ago, the earlier | |
794 | * frames that have not yet been received are assumed to be lost and the skb | |
795 | * can be released for processing. This may also release other skb's from the | |
796 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
797 | * |
798 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
799 | */ |
800 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
801 | ||
d3b2fb53 | 802 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
803 | struct tid_ampdu_rx *tid_agg_rx, |
804 | struct sk_buff_head *frames) | |
aa0c8636 | 805 | { |
83eb935e | 806 | int index, i, j; |
aa0c8636 | 807 | |
dd318575 JB |
808 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
809 | ||
aa0c8636 | 810 | /* release the buffer until next missing frame */ |
2e3049b7 | 811 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 812 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 813 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
814 | /* |
815 | * No buffers ready to be released, but check whether any | |
816 | * frames in the reorder buffer have timed out. | |
817 | */ | |
aa0c8636 CL |
818 | int skipped = 1; |
819 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
820 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
821 | if (!ieee80211_rx_reorder_ready( |
822 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
823 | skipped++; |
824 | continue; | |
825 | } | |
499fe9a4 DH |
826 | if (skipped && |
827 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 828 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 829 | goto set_release_timer; |
aa0c8636 | 830 | |
83eb935e MK |
831 | /* don't leave incomplete A-MSDUs around */ |
832 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
833 | i = (i + 1) % tid_agg_rx->buf_size) | |
834 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
835 | ||
bdcbd8e0 JB |
836 | ht_dbg_ratelimited(sdata, |
837 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
838 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
839 | frames); | |
aa0c8636 CL |
840 | |
841 | /* | |
842 | * Increment the head seq# also for the skipped slots. | |
843 | */ | |
844 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
845 | (tid_agg_rx->head_seq_num + |
846 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
847 | skipped = 0; |
848 | } | |
83eb935e MK |
849 | } else while (ieee80211_rx_reorder_ready( |
850 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
851 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
852 | frames); | |
2e3049b7 | 853 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 854 | } |
2bff8ebf CL |
855 | |
856 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 857 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
858 | |
859 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
860 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
861 | if (ieee80211_rx_reorder_ready( |
862 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
863 | break; |
864 | } | |
865 | ||
866 | set_release_timer: | |
867 | ||
868 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 869 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
870 | HT_RX_REORDER_BUF_TIMEOUT); |
871 | } else { | |
872 | del_timer(&tid_agg_rx->reorder_timer); | |
873 | } | |
aa0c8636 CL |
874 | } |
875 | ||
1edfb1af JB |
876 | /* |
877 | * As this function belongs to the RX path it must be under | |
878 | * rcu_read_lock protection. It returns false if the frame | |
879 | * can be processed immediately, true if it was consumed. | |
880 | */ | |
d3b2fb53 | 881 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 882 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
883 | struct sk_buff *skb, |
884 | struct sk_buff_head *frames) | |
1edfb1af JB |
885 | { |
886 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 887 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
888 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
889 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
890 | u16 head_seq_num, buf_size; | |
891 | int index; | |
2bff8ebf | 892 | bool ret = true; |
1edfb1af | 893 | |
dd318575 JB |
894 | spin_lock(&tid_agg_rx->reorder_lock); |
895 | ||
4549cf2b MK |
896 | /* |
897 | * Offloaded BA sessions have no known starting sequence number so pick | |
898 | * one from first Rxed frame for this tid after BA was started. | |
899 | */ | |
900 | if (unlikely(tid_agg_rx->auto_seq)) { | |
901 | tid_agg_rx->auto_seq = false; | |
902 | tid_agg_rx->ssn = mpdu_seq_num; | |
903 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
904 | } | |
905 | ||
1edfb1af JB |
906 | buf_size = tid_agg_rx->buf_size; |
907 | head_seq_num = tid_agg_rx->head_seq_num; | |
908 | ||
909 | /* frame with out of date sequence number */ | |
9a886586 | 910 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 911 | dev_kfree_skb(skb); |
2bff8ebf | 912 | goto out; |
1edfb1af JB |
913 | } |
914 | ||
915 | /* | |
916 | * If frame the sequence number exceeds our buffering window | |
917 | * size release some previous frames to make room for this one. | |
918 | */ | |
9a886586 JB |
919 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
920 | head_seq_num = ieee80211_sn_inc( | |
921 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 922 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 923 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 924 | head_seq_num, frames); |
1edfb1af JB |
925 | } |
926 | ||
927 | /* Now the new frame is always in the range of the reordering buffer */ | |
928 | ||
2e3049b7 | 929 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
930 | |
931 | /* check if we already stored this frame */ | |
83eb935e | 932 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 933 | dev_kfree_skb(skb); |
2bff8ebf | 934 | goto out; |
1edfb1af JB |
935 | } |
936 | ||
937 | /* | |
938 | * If the current MPDU is in the right order and nothing else | |
939 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
940 | * If it is first but there's something stored, we may be able |
941 | * to release frames after this one. | |
1edfb1af JB |
942 | */ |
943 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
944 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
945 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
946 | tid_agg_rx->head_seq_num = | |
947 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
948 | ret = false; |
949 | goto out; | |
1edfb1af JB |
950 | } |
951 | ||
952 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
953 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
954 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
955 | tid_agg_rx->reorder_time[index] = jiffies; | |
956 | tid_agg_rx->stored_mpdu_num++; | |
957 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
958 | } | |
1edfb1af | 959 | |
2bff8ebf CL |
960 | out: |
961 | spin_unlock(&tid_agg_rx->reorder_lock); | |
962 | return ret; | |
1edfb1af JB |
963 | } |
964 | ||
965 | /* | |
966 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
967 | * true if the MPDU was buffered, false if it should be processed. | |
968 | */ | |
f9e124fb CL |
969 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
970 | struct sk_buff_head *frames) | |
1edfb1af | 971 | { |
2569a826 JB |
972 | struct sk_buff *skb = rx->skb; |
973 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 974 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 975 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 976 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
977 | struct tid_ampdu_rx *tid_agg_rx; |
978 | u16 sc; | |
6cc00d54 | 979 | u8 tid, ack_policy; |
1edfb1af | 980 | |
051a41fa JB |
981 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
982 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 983 | goto dont_reorder; |
1edfb1af JB |
984 | |
985 | /* | |
986 | * filter the QoS data rx stream according to | |
987 | * STA/TID and check if this STA/TID is on aggregation | |
988 | */ | |
989 | ||
1edfb1af | 990 | if (!sta) |
2569a826 | 991 | goto dont_reorder; |
1edfb1af | 992 | |
6cc00d54 TP |
993 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
994 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
995 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
996 | ||
a87f736d JB |
997 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
998 | if (!tid_agg_rx) | |
999 | goto dont_reorder; | |
1edfb1af JB |
1000 | |
1001 | /* qos null data frames are excluded */ | |
1002 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1003 | goto dont_reorder; |
1edfb1af | 1004 | |
6cc00d54 TP |
1005 | /* not part of a BA session */ |
1006 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1007 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1008 | goto dont_reorder; | |
1009 | ||
660c6a44 TP |
1010 | /* not actually part of this BA session */ |
1011 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1012 | goto dont_reorder; | |
1013 | ||
1edfb1af JB |
1014 | /* new, potentially un-ordered, ampdu frame - process it */ |
1015 | ||
1016 | /* reset session timer */ | |
1017 | if (tid_agg_rx->timeout) | |
12d3952f | 1018 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1019 | |
1020 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1021 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1022 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1023 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1024 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1025 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1026 | return; |
1edfb1af JB |
1027 | } |
1028 | ||
a87f736d JB |
1029 | /* |
1030 | * No locking needed -- we will only ever process one | |
1031 | * RX packet at a time, and thus own tid_agg_rx. All | |
1032 | * other code manipulating it needs to (and does) make | |
1033 | * sure that we cannot get to it any more before doing | |
1034 | * anything with it. | |
1035 | */ | |
f9e124fb CL |
1036 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1037 | frames)) | |
2569a826 JB |
1038 | return; |
1039 | ||
1040 | dont_reorder: | |
f9e124fb | 1041 | __skb_queue_tail(frames, skb); |
1edfb1af | 1042 | } |
33b64eb2 | 1043 | |
49461622 | 1044 | static ieee80211_rx_result debug_noinline |
0395442a | 1045 | ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) |
571ecf67 | 1046 | { |
a7767f95 | 1047 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1048 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1049 | |
6b0f3274 JB |
1050 | /* |
1051 | * Drop duplicate 802.11 retransmissions | |
1052 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1053 | */ | |
0395442a JB |
1054 | |
1055 | if (rx->skb->len < 24) | |
1056 | return RX_CONTINUE; | |
1057 | ||
1058 | if (ieee80211_is_ctl(hdr->frame_control) || | |
1059 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
1060 | is_multicast_ether_addr(hdr->addr1)) | |
1061 | return RX_CONTINUE; | |
1062 | ||
1063 | if (rx->sta) { | |
a7767f95 | 1064 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1065 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1066 | hdr->seq_ctrl)) { |
554891e6 | 1067 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
1068 | rx->local->dot11FrameDuplicateCount++; |
1069 | rx->sta->num_duplicates++; | |
1070 | } | |
b1f93314 | 1071 | return RX_DROP_UNUSABLE; |
0cfcefef | 1072 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1073 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1074 | } |
571ecf67 JB |
1075 | } |
1076 | ||
0395442a JB |
1077 | return RX_CONTINUE; |
1078 | } | |
1079 | ||
1080 | static ieee80211_rx_result debug_noinline | |
1081 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) | |
1082 | { | |
1083 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
1084 | ||
571ecf67 JB |
1085 | if (unlikely(rx->skb->len < 16)) { |
1086 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 1087 | return RX_DROP_MONITOR; |
571ecf67 JB |
1088 | } |
1089 | ||
571ecf67 JB |
1090 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1091 | * IEEE 802.11, Chap 5.5. | |
1092 | * | |
ccd7b362 JB |
1093 | * mac80211 filters only based on association state, i.e. it drops |
1094 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1095 | * deauth/disassoc frames when needed. In addition, hostapd is |
1096 | * responsible for filtering on both auth and assoc states. | |
1097 | */ | |
33b64eb2 | 1098 | |
902acc78 | 1099 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1100 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1101 | |
a7767f95 HH |
1102 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1103 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1104 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1105 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1106 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1107 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1108 | /* |
1109 | * accept port control frames from the AP even when it's not | |
1110 | * yet marked ASSOC to prevent a race where we don't set the | |
1111 | * assoc bit quickly enough before it sends the first frame | |
1112 | */ | |
1113 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1114 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1115 | unsigned int hdrlen; |
1116 | __be16 ethertype; | |
1117 | ||
1118 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1119 | ||
1120 | if (rx->skb->len < hdrlen + 8) | |
1121 | return RX_DROP_MONITOR; | |
1122 | ||
1123 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1124 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1125 | return RX_CONTINUE; |
1126 | } | |
21fc7560 JB |
1127 | |
1128 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1129 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1130 | hdr->addr2, | |
1131 | GFP_ATOMIC)) | |
1132 | return RX_DROP_UNUSABLE; | |
1133 | ||
e4c26add | 1134 | return RX_DROP_MONITOR; |
2a33bee2 | 1135 | } |
571ecf67 | 1136 | |
9ae54c84 | 1137 | return RX_CONTINUE; |
570bd537 JB |
1138 | } |
1139 | ||
1140 | ||
572e0012 KV |
1141 | static ieee80211_rx_result debug_noinline |
1142 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1143 | { | |
1144 | struct ieee80211_local *local; | |
1145 | struct ieee80211_hdr *hdr; | |
1146 | struct sk_buff *skb; | |
1147 | ||
1148 | local = rx->local; | |
1149 | skb = rx->skb; | |
1150 | hdr = (struct ieee80211_hdr *) skb->data; | |
1151 | ||
1152 | if (!local->pspolling) | |
1153 | return RX_CONTINUE; | |
1154 | ||
1155 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1156 | /* this is not from AP */ | |
1157 | return RX_CONTINUE; | |
1158 | ||
1159 | if (!ieee80211_is_data(hdr->frame_control)) | |
1160 | return RX_CONTINUE; | |
1161 | ||
1162 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1163 | /* AP has no more frames buffered for us */ | |
1164 | local->pspolling = false; | |
1165 | return RX_CONTINUE; | |
1166 | } | |
1167 | ||
1168 | /* more data bit is set, let's request a new frame from the AP */ | |
1169 | ieee80211_send_pspoll(local, rx->sdata); | |
1170 | ||
1171 | return RX_CONTINUE; | |
1172 | } | |
1173 | ||
d012a605 | 1174 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1175 | { |
133b8226 | 1176 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1177 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1178 | struct ps_data *ps; |
0795af57 | 1179 | |
d012a605 MP |
1180 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1181 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1182 | ps = &sdata->bss->ps; | |
1183 | else | |
1184 | return; | |
1185 | ||
1186 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1187 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1188 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1189 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1190 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1191 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1192 | } |
1193 | ||
d012a605 | 1194 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1195 | { |
bdcbd8e0 JB |
1196 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1197 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1198 | |
c2c98fde | 1199 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1200 | /* |
1201 | * Clear the flag only if the other one is still set | |
1202 | * so that the TX path won't start TX'ing new frames | |
1203 | * directly ... In the case that the driver flag isn't | |
1204 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1205 | */ | |
1206 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1207 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1208 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1209 | return; |
1210 | } | |
1211 | ||
5ac2e350 JB |
1212 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1213 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1214 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1215 | } |
1216 | ||
d057e5a3 AN |
1217 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1218 | { | |
1219 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1220 | bool in_ps; | |
1221 | ||
1222 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1223 | ||
1224 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1225 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1226 | if ((start && in_ps) || (!start && !in_ps)) |
1227 | return -EINVAL; | |
1228 | ||
1229 | if (start) | |
d012a605 | 1230 | sta_ps_start(sta_inf); |
d057e5a3 | 1231 | else |
d012a605 | 1232 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1233 | |
1234 | return 0; | |
1235 | } | |
1236 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1237 | ||
47086fc5 JB |
1238 | static ieee80211_rx_result debug_noinline |
1239 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1240 | { | |
1241 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1242 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1243 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1244 | int tid, ac; | |
1245 | ||
1246 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1247 | return RX_CONTINUE; | |
1248 | ||
1249 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1250 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1251 | return RX_CONTINUE; | |
1252 | ||
1253 | /* | |
1254 | * The device handles station powersave, so don't do anything about | |
1255 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1256 | * it to mac80211 since they're handled.) | |
1257 | */ | |
1258 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1259 | return RX_CONTINUE; | |
1260 | ||
1261 | /* | |
1262 | * Don't do anything if the station isn't already asleep. In | |
1263 | * the uAPSD case, the station will probably be marked asleep, | |
1264 | * in the PS-Poll case the station must be confused ... | |
1265 | */ | |
c2c98fde | 1266 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1267 | return RX_CONTINUE; |
1268 | ||
1269 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1270 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1271 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1272 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1273 | else | |
c2c98fde | 1274 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1275 | } |
47086fc5 JB |
1276 | |
1277 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1278 | * count as an dropped frame. */ | |
1279 | dev_kfree_skb(rx->skb); | |
1280 | ||
1281 | return RX_QUEUED; | |
1282 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1283 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1284 | ieee80211_has_pm(hdr->frame_control) && | |
1285 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1286 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1287 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1288 | ac = ieee802_1d_to_ac[tid & 7]; | |
1289 | ||
1290 | /* | |
1291 | * If this AC is not trigger-enabled do nothing. | |
1292 | * | |
1293 | * NB: This could/should check a separate bitmap of trigger- | |
1294 | * enabled queues, but for now we only implement uAPSD w/o | |
1295 | * TSPEC changes to the ACs, so they're always the same. | |
1296 | */ | |
1297 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1298 | return RX_CONTINUE; | |
1299 | ||
1300 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1301 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1302 | return RX_CONTINUE; |
1303 | ||
c2c98fde | 1304 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1305 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1306 | else | |
c2c98fde | 1307 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1308 | } |
1309 | ||
1310 | return RX_CONTINUE; | |
1311 | } | |
1312 | ||
49461622 | 1313 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1314 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1315 | { |
1316 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1317 | struct sk_buff *skb = rx->skb; |
1318 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1319 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1320 | int i; |
571ecf67 JB |
1321 | |
1322 | if (!sta) | |
9ae54c84 | 1323 | return RX_CONTINUE; |
571ecf67 | 1324 | |
b291ba11 JB |
1325 | /* |
1326 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1327 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1328 | * current IBSS network alive in cases where other STAs start | |
1329 | * using different BSSID. This will also give the station another | |
1330 | * chance to restart the authentication/authorization in case | |
1331 | * something went wrong the first time. | |
b291ba11 | 1332 | */ |
05c914fe | 1333 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1334 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1335 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1336 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1337 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1338 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1339 | if (ieee80211_is_data(hdr->frame_control) && |
1340 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1341 | sta->last_rx_rate_idx = status->rate_idx; |
1342 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1343 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1344 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1345 | } |
1346 | } | |
239281f8 RL |
1347 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
1348 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, | |
1349 | NL80211_IFTYPE_OCB); | |
1350 | /* OCB uses wild-card BSSID */ | |
1351 | if (is_broadcast_ether_addr(bssid)) | |
1352 | sta->last_rx = jiffies; | |
b291ba11 JB |
1353 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1354 | /* | |
33b64eb2 LCC |
1355 | * Mesh beacons will update last_rx when if they are found to |
1356 | * match the current local configuration when processed. | |
571ecf67 | 1357 | */ |
b291ba11 | 1358 | sta->last_rx = jiffies; |
3af6334c FF |
1359 | if (ieee80211_is_data(hdr->frame_control)) { |
1360 | sta->last_rx_rate_idx = status->rate_idx; | |
1361 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1362 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1363 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1364 | } |
571ecf67 JB |
1365 | } |
1366 | ||
554891e6 | 1367 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1368 | return RX_CONTINUE; |
571ecf67 | 1369 | |
3cf335d5 KV |
1370 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1371 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1372 | ||
571ecf67 JB |
1373 | sta->rx_fragments++; |
1374 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1375 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1376 | sta->last_signal = status->signal; | |
1377 | ewma_add(&sta->avg_signal, -status->signal); | |
1378 | } | |
571ecf67 | 1379 | |
ef0621e8 FF |
1380 | if (status->chains) { |
1381 | sta->chains = status->chains; | |
1382 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1383 | int signal = status->chain_signal[i]; | |
1384 | ||
1385 | if (!(status->chains & BIT(i))) | |
1386 | continue; | |
1387 | ||
1388 | sta->chain_signal_last[i] = signal; | |
1389 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1390 | } | |
1391 | } | |
1392 | ||
72eaa43a JB |
1393 | /* |
1394 | * Change STA power saving mode only at the end of a frame | |
1395 | * exchange sequence. | |
1396 | */ | |
d057e5a3 AN |
1397 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1398 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1399 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1400 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1401 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1402 | /* PM bit is only checked in frames where it isn't reserved, | |
1403 | * in AP mode it's reserved in non-bufferable management frames | |
1404 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1405 | */ | |
1406 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1407 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1408 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1409 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1410 | sta_ps_end(sta); |
72eaa43a JB |
1411 | } else { |
1412 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1413 | sta_ps_start(sta); |
72eaa43a | 1414 | } |
571ecf67 JB |
1415 | } |
1416 | ||
3f52b7e3 MP |
1417 | /* mesh power save support */ |
1418 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1419 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1420 | ||
22403def JB |
1421 | /* |
1422 | * Drop (qos-)data::nullfunc frames silently, since they | |
1423 | * are used only to control station power saving mode. | |
1424 | */ | |
1425 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1426 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1427 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1428 | |
1429 | /* | |
1430 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1431 | * that was not moved to a 4-addr STA vlan yet send |
1432 | * the event to userspace and for older hostapd drop | |
1433 | * the frame to the monitor interface. | |
d524215f FF |
1434 | */ |
1435 | if (ieee80211_has_a4(hdr->frame_control) && | |
1436 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1437 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1438 | !rx->sdata->u.vlan.sta))) { |
1439 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1440 | cfg80211_rx_unexpected_4addr_frame( | |
1441 | rx->sdata->dev, sta->sta.addr, | |
1442 | GFP_ATOMIC); | |
d524215f | 1443 | return RX_DROP_MONITOR; |
e7f4a940 | 1444 | } |
22403def JB |
1445 | /* |
1446 | * Update counter and free packet here to avoid | |
1447 | * counting this as a dropped packed. | |
1448 | */ | |
571ecf67 JB |
1449 | sta->rx_packets++; |
1450 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1451 | return RX_QUEUED; |
571ecf67 JB |
1452 | } |
1453 | ||
9ae54c84 | 1454 | return RX_CONTINUE; |
571ecf67 JB |
1455 | } /* ieee80211_rx_h_sta_process */ |
1456 | ||
86c228a7 JA |
1457 | static ieee80211_rx_result debug_noinline |
1458 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1459 | { | |
1460 | struct sk_buff *skb = rx->skb; | |
1461 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1462 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1463 | int keyidx; | |
1464 | int hdrlen; | |
1465 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1466 | struct ieee80211_key *sta_ptk = NULL; | |
1467 | int mmie_keyidx = -1; | |
1468 | __le16 fc; | |
2475b1cc | 1469 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1470 | |
1471 | /* | |
1472 | * Key selection 101 | |
1473 | * | |
1474 | * There are four types of keys: | |
1475 | * - GTK (group keys) | |
1476 | * - IGTK (group keys for management frames) | |
1477 | * - PTK (pairwise keys) | |
1478 | * - STK (station-to-station pairwise keys) | |
1479 | * | |
1480 | * When selecting a key, we have to distinguish between multicast | |
1481 | * (including broadcast) and unicast frames, the latter can only | |
1482 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1483 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1484 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1485 | * don't have a PTK/STK we check the key index for a WEP key. | |
1486 | * | |
1487 | * Note that in a regular BSS, multicast frames are sent by the | |
1488 | * AP only, associated stations unicast the frame to the AP first | |
1489 | * which then multicasts it on their behalf. | |
1490 | * | |
1491 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1492 | * with each station, that is something we don't currently handle. | |
1493 | * The spec seems to expect that one negotiates the same key with | |
1494 | * every station but there's no such requirement; VLANs could be | |
1495 | * possible. | |
1496 | */ | |
1497 | ||
1498 | /* | |
1499 | * No point in finding a key and decrypting if the frame is neither | |
1500 | * addressed to us nor a multicast frame. | |
1501 | */ | |
1502 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1503 | return RX_CONTINUE; | |
1504 | ||
1505 | /* start without a key */ | |
1506 | rx->key = NULL; | |
2475b1cc | 1507 | fc = hdr->frame_control; |
86c228a7 | 1508 | |
2475b1cc MS |
1509 | if (rx->sta) { |
1510 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1511 | |
2475b1cc MS |
1512 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1513 | cs = rx->sta->cipher_scheme; | |
1514 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1515 | if (unlikely(keyid < 0)) | |
1516 | return RX_DROP_UNUSABLE; | |
1517 | } | |
1518 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1519 | } | |
86c228a7 JA |
1520 | |
1521 | if (!ieee80211_has_protected(fc)) | |
1522 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1523 | ||
1524 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1525 | rx->key = sta_ptk; | |
1526 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1527 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1528 | return RX_CONTINUE; | |
1529 | /* Skip decryption if the frame is not protected. */ | |
1530 | if (!ieee80211_has_protected(fc)) | |
1531 | return RX_CONTINUE; | |
1532 | } else if (mmie_keyidx >= 0) { | |
1533 | /* Broadcast/multicast robust management frame / BIP */ | |
1534 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1535 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1536 | return RX_CONTINUE; | |
1537 | ||
1538 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1539 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1540 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1541 | if (rx->sta) | |
1542 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1543 | if (!rx->key) | |
1544 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1545 | } else if (!ieee80211_has_protected(fc)) { | |
1546 | /* | |
1547 | * The frame was not protected, so skip decryption. However, we | |
1548 | * need to set rx->key if there is a key that could have been | |
1549 | * used so that the frame may be dropped if encryption would | |
1550 | * have been expected. | |
1551 | */ | |
1552 | struct ieee80211_key *key = NULL; | |
1553 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1554 | int i; | |
1555 | ||
1556 | if (ieee80211_is_mgmt(fc) && | |
1557 | is_multicast_ether_addr(hdr->addr1) && | |
1558 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1559 | rx->key = key; | |
1560 | else { | |
1561 | if (rx->sta) { | |
1562 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1563 | key = rcu_dereference(rx->sta->gtk[i]); | |
1564 | if (key) | |
1565 | break; | |
1566 | } | |
1567 | } | |
1568 | if (!key) { | |
1569 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1570 | key = rcu_dereference(sdata->keys[i]); | |
1571 | if (key) | |
1572 | break; | |
1573 | } | |
1574 | } | |
1575 | if (key) | |
1576 | rx->key = key; | |
1577 | } | |
1578 | return RX_CONTINUE; | |
1579 | } else { | |
1580 | u8 keyid; | |
2475b1cc | 1581 | |
86c228a7 JA |
1582 | /* |
1583 | * The device doesn't give us the IV so we won't be | |
1584 | * able to look up the key. That's ok though, we | |
1585 | * don't need to decrypt the frame, we just won't | |
1586 | * be able to keep statistics accurate. | |
1587 | * Except for key threshold notifications, should | |
1588 | * we somehow allow the driver to tell us which key | |
1589 | * the hardware used if this flag is set? | |
1590 | */ | |
1591 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1592 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1593 | return RX_CONTINUE; | |
1594 | ||
1595 | hdrlen = ieee80211_hdrlen(fc); | |
1596 | ||
2475b1cc MS |
1597 | if (cs) { |
1598 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1599 | |
2475b1cc MS |
1600 | if (unlikely(keyidx < 0)) |
1601 | return RX_DROP_UNUSABLE; | |
1602 | } else { | |
1603 | if (rx->skb->len < 8 + hdrlen) | |
1604 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1605 | /* | |
1606 | * no need to call ieee80211_wep_get_keyidx, | |
1607 | * it verifies a bunch of things we've done already | |
1608 | */ | |
1609 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1610 | keyidx = keyid >> 6; | |
1611 | } | |
86c228a7 JA |
1612 | |
1613 | /* check per-station GTK first, if multicast packet */ | |
1614 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1615 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1616 | ||
1617 | /* if not found, try default key */ | |
1618 | if (!rx->key) { | |
1619 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1620 | ||
1621 | /* | |
1622 | * RSNA-protected unicast frames should always be | |
1623 | * sent with pairwise or station-to-station keys, | |
1624 | * but for WEP we allow using a key index as well. | |
1625 | */ | |
1626 | if (rx->key && | |
1627 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1628 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1629 | !is_multicast_ether_addr(hdr->addr1)) | |
1630 | rx->key = NULL; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | if (rx->key) { | |
1635 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1636 | return RX_DROP_MONITOR; | |
1637 | ||
1638 | rx->key->tx_rx_count++; | |
1639 | /* TODO: add threshold stuff again */ | |
1640 | } else { | |
1641 | return RX_DROP_MONITOR; | |
1642 | } | |
1643 | ||
1644 | switch (rx->key->conf.cipher) { | |
1645 | case WLAN_CIPHER_SUITE_WEP40: | |
1646 | case WLAN_CIPHER_SUITE_WEP104: | |
1647 | result = ieee80211_crypto_wep_decrypt(rx); | |
1648 | break; | |
1649 | case WLAN_CIPHER_SUITE_TKIP: | |
1650 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1651 | break; | |
1652 | case WLAN_CIPHER_SUITE_CCMP: | |
1653 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1654 | break; | |
1655 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1656 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1657 | break; | |
00b9cfa3 JM |
1658 | case WLAN_CIPHER_SUITE_GCMP: |
1659 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1660 | result = ieee80211_crypto_gcmp_decrypt(rx); | |
1661 | break; | |
86c228a7 | 1662 | default: |
2475b1cc | 1663 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1664 | } |
1665 | ||
1666 | /* the hdr variable is invalid after the decrypt handlers */ | |
1667 | ||
1668 | /* either the frame has been decrypted or will be dropped */ | |
1669 | status->flag |= RX_FLAG_DECRYPTED; | |
1670 | ||
1671 | return result; | |
1672 | } | |
1673 | ||
571ecf67 JB |
1674 | static inline struct ieee80211_fragment_entry * |
1675 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1676 | unsigned int frag, unsigned int seq, int rx_queue, | |
1677 | struct sk_buff **skb) | |
1678 | { | |
1679 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1680 | |
571ecf67 JB |
1681 | entry = &sdata->fragments[sdata->fragment_next++]; |
1682 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1683 | sdata->fragment_next = 0; | |
1684 | ||
bdcbd8e0 | 1685 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1686 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1687 | |
1688 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1689 | *skb = NULL; | |
1690 | entry->first_frag_time = jiffies; | |
1691 | entry->seq = seq; | |
1692 | entry->rx_queue = rx_queue; | |
1693 | entry->last_frag = frag; | |
1694 | entry->ccmp = 0; | |
1695 | entry->extra_len = 0; | |
1696 | ||
1697 | return entry; | |
1698 | } | |
1699 | ||
1700 | static inline struct ieee80211_fragment_entry * | |
1701 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1702 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1703 | int rx_queue, struct ieee80211_hdr *hdr) |
1704 | { | |
1705 | struct ieee80211_fragment_entry *entry; | |
1706 | int i, idx; | |
1707 | ||
1708 | idx = sdata->fragment_next; | |
1709 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1710 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1711 | |
1712 | idx--; | |
1713 | if (idx < 0) | |
1714 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1715 | ||
1716 | entry = &sdata->fragments[idx]; | |
1717 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1718 | entry->rx_queue != rx_queue || | |
1719 | entry->last_frag + 1 != frag) | |
1720 | continue; | |
1721 | ||
b73d70ad | 1722 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1723 | |
b73d70ad HH |
1724 | /* |
1725 | * Check ftype and addresses are equal, else check next fragment | |
1726 | */ | |
1727 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1728 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1729 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1730 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1731 | continue; |
1732 | ||
ab46623e | 1733 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1734 | __skb_queue_purge(&entry->skb_list); |
1735 | continue; | |
1736 | } | |
1737 | return entry; | |
1738 | } | |
1739 | ||
1740 | return NULL; | |
1741 | } | |
1742 | ||
49461622 | 1743 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1744 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1745 | { |
1746 | struct ieee80211_hdr *hdr; | |
1747 | u16 sc; | |
358c8d9d | 1748 | __le16 fc; |
571ecf67 JB |
1749 | unsigned int frag, seq; |
1750 | struct ieee80211_fragment_entry *entry; | |
1751 | struct sk_buff *skb; | |
554891e6 | 1752 | struct ieee80211_rx_status *status; |
571ecf67 | 1753 | |
b73d70ad | 1754 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1755 | fc = hdr->frame_control; |
f7fbf70e JC |
1756 | |
1757 | if (ieee80211_is_ctl(fc)) | |
1758 | return RX_CONTINUE; | |
1759 | ||
571ecf67 JB |
1760 | sc = le16_to_cpu(hdr->seq_ctrl); |
1761 | frag = sc & IEEE80211_SCTL_FRAG; | |
1762 | ||
b8fff407 JB |
1763 | if (is_multicast_ether_addr(hdr->addr1)) { |
1764 | rx->local->dot11MulticastReceivedFrameCount++; | |
d025933e | 1765 | goto out_no_led; |
571ecf67 | 1766 | } |
b8fff407 | 1767 | |
d025933e AM |
1768 | if (likely(!ieee80211_has_morefrags(fc) && frag == 0)) |
1769 | goto out; | |
1770 | ||
571ecf67 JB |
1771 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
1772 | ||
e3cf8b3f ZY |
1773 | if (skb_linearize(rx->skb)) |
1774 | return RX_DROP_UNUSABLE; | |
1775 | ||
058897a4 AK |
1776 | /* |
1777 | * skb_linearize() might change the skb->data and | |
1778 | * previously cached variables (in this case, hdr) need to | |
1779 | * be refreshed with the new data. | |
1780 | */ | |
1781 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1782 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1783 | ||
1784 | if (frag == 0) { | |
1785 | /* This is the first fragment of a new frame. */ | |
1786 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1787 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1788 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1789 | ieee80211_has_protected(fc)) { |
9e26297a | 1790 | int queue = rx->security_idx; |
571ecf67 JB |
1791 | /* Store CCMP PN so that we can verify that the next |
1792 | * fragment has a sequential PN value. */ | |
1793 | entry->ccmp = 1; | |
1794 | memcpy(entry->last_pn, | |
9190252c | 1795 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1796 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1797 | } |
9ae54c84 | 1798 | return RX_QUEUED; |
571ecf67 JB |
1799 | } |
1800 | ||
1801 | /* This is a fragment for a frame that should already be pending in | |
1802 | * fragment cache. Add this fragment to the end of the pending entry. | |
1803 | */ | |
9e26297a JB |
1804 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1805 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1806 | if (!entry) { |
1807 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1808 | return RX_DROP_MONITOR; |
571ecf67 JB |
1809 | } |
1810 | ||
1811 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1812 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1813 | if (entry->ccmp) { | |
1814 | int i; | |
4325f6ca | 1815 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1816 | int queue; |
97359d12 | 1817 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1818 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1819 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1820 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1821 | pn[i]++; |
1822 | if (pn[i]) | |
1823 | break; | |
1824 | } | |
9e26297a | 1825 | queue = rx->security_idx; |
9190252c | 1826 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1827 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1828 | return RX_DROP_UNUSABLE; |
4325f6ca | 1829 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1830 | } |
1831 | ||
358c8d9d | 1832 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1833 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1834 | entry->last_frag = frag; | |
1835 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1836 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1837 | rx->skb = NULL; |
9ae54c84 | 1838 | return RX_QUEUED; |
571ecf67 JB |
1839 | } |
1840 | ||
1841 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1842 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1843 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1844 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1845 | GFP_ATOMIC))) { | |
1846 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1847 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1848 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1849 | } |
1850 | } | |
1851 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1852 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1853 | dev_kfree_skb(skb); | |
1854 | } | |
1855 | ||
1856 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1857 | status = IEEE80211_SKB_RXCB(rx->skb); |
1858 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1859 | |
1860 | out: | |
d025933e AM |
1861 | ieee80211_led_rx(rx->local); |
1862 | out_no_led: | |
571ecf67 JB |
1863 | if (rx->sta) |
1864 | rx->sta->rx_packets++; | |
9ae54c84 | 1865 | return RX_CONTINUE; |
571ecf67 JB |
1866 | } |
1867 | ||
1df332e8 | 1868 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1869 | { |
1df332e8 | 1870 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1871 | return -EACCES; |
571ecf67 | 1872 | |
76ee65bf | 1873 | return 0; |
571ecf67 JB |
1874 | } |
1875 | ||
1df332e8 | 1876 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1877 | { |
eb9fb5b8 JB |
1878 | struct sk_buff *skb = rx->skb; |
1879 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1880 | ||
3017b80b | 1881 | /* |
7848ba7d JB |
1882 | * Pass through unencrypted frames if the hardware has |
1883 | * decrypted them already. | |
3017b80b | 1884 | */ |
eb9fb5b8 | 1885 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1886 | return 0; |
571ecf67 JB |
1887 | |
1888 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1889 | if (unlikely(!ieee80211_has_protected(fc) && |
1890 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1891 | ieee80211_is_data(fc) && |
b3fc9c6c | 1892 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1893 | return -EACCES; |
bef5d1c7 JB |
1894 | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1df332e8 | 1898 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1899 | { |
1900 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1901 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1902 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1903 | |
e3efca0a JM |
1904 | /* |
1905 | * Pass through unencrypted frames if the hardware has | |
1906 | * decrypted them already. | |
1907 | */ | |
1908 | if (status->flag & RX_FLAG_DECRYPTED) | |
1909 | return 0; | |
bef5d1c7 | 1910 | |
c2c98fde | 1911 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1912 | if (unlikely(!ieee80211_has_protected(fc) && |
1913 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1914 | rx->key)) { |
6ff57cf8 JB |
1915 | if (ieee80211_is_deauth(fc) || |
1916 | ieee80211_is_disassoc(fc)) | |
1917 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1918 | rx->skb->data, | |
1919 | rx->skb->len); | |
f2ca3ea4 | 1920 | return -EACCES; |
cf4e594e | 1921 | } |
f2ca3ea4 | 1922 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1923 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1924 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1925 | if (ieee80211_is_deauth(fc) || |
1926 | ieee80211_is_disassoc(fc)) | |
1927 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1928 | rx->skb->data, | |
1929 | rx->skb->len); | |
f2ca3ea4 | 1930 | return -EACCES; |
cf4e594e | 1931 | } |
f2ca3ea4 JM |
1932 | /* |
1933 | * When using MFP, Action frames are not allowed prior to | |
1934 | * having configured keys. | |
1935 | */ | |
1936 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1937 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1938 | return -EACCES; |
1939 | } | |
b3fc9c6c | 1940 | |
76ee65bf | 1941 | return 0; |
571ecf67 JB |
1942 | } |
1943 | ||
76ee65bf | 1944 | static int |
4114fa21 | 1945 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1946 | { |
eb9fb5b8 | 1947 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1948 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1949 | bool check_port_control = false; |
1950 | struct ethhdr *ehdr; | |
1951 | int ret; | |
f14543ee | 1952 | |
4114fa21 | 1953 | *port_control = false; |
9bc383de JB |
1954 | if (ieee80211_has_a4(hdr->frame_control) && |
1955 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1956 | return -1; |
9bc383de | 1957 | |
fbb327c5 FF |
1958 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1959 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1960 | ||
1961 | if (!sdata->u.mgd.use_4addr) | |
1962 | return -1; | |
1963 | else | |
1964 | check_port_control = true; | |
1965 | } | |
1966 | ||
9bc383de | 1967 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1968 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1969 | return -1; |
571ecf67 | 1970 | |
fbb327c5 | 1971 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1972 | if (ret < 0) |
fbb327c5 FF |
1973 | return ret; |
1974 | ||
1975 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1976 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1977 | *port_control = true; | |
1978 | else if (check_port_control) | |
fbb327c5 FF |
1979 | return -1; |
1980 | ||
1981 | return 0; | |
76ee65bf | 1982 | } |
571ecf67 | 1983 | |
ce3edf6d JB |
1984 | /* |
1985 | * requires that rx->skb is a frame with ethernet header | |
1986 | */ | |
358c8d9d | 1987 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1988 | { |
c97c23e3 | 1989 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1990 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1991 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1992 | ||
1993 | /* | |
1994 | * Allow EAPOL frames to us/the PAE group address regardless | |
1995 | * of whether the frame was encrypted or not. | |
1996 | */ | |
a621fa4d | 1997 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1998 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1999 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
2000 | return true; |
2001 | ||
2002 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 2003 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
2004 | return false; |
2005 | ||
2006 | return true; | |
2007 | } | |
2008 | ||
2009 | /* | |
2010 | * requires that rx->skb is a frame with ethernet header | |
2011 | */ | |
76ee65bf | 2012 | static void |
5cf121c3 | 2013 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2014 | { |
eb9fb5b8 JB |
2015 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2016 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2017 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2018 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2019 | struct sta_info *dsta; | |
554891e6 | 2020 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 2021 | |
76ee65bf RR |
2022 | skb = rx->skb; |
2023 | xmit_skb = NULL; | |
571ecf67 | 2024 | |
05c914fe JB |
2025 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2026 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2027 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 2028 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 2029 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
2030 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
2031 | /* | |
2032 | * send multicast frames both to higher layers in | |
2033 | * local net stack and back to the wireless medium | |
2034 | */ | |
76ee65bf | 2035 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2036 | if (!xmit_skb) |
bdcbd8e0 | 2037 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2038 | dev->name); |
571ecf67 | 2039 | } else { |
abe60632 JB |
2040 | dsta = sta_info_get(sdata, skb->data); |
2041 | if (dsta) { | |
ce3edf6d JB |
2042 | /* |
2043 | * The destination station is associated to | |
2044 | * this AP (in this VLAN), so send the frame | |
2045 | * directly to it and do not pass it to local | |
2046 | * net stack. | |
571ecf67 | 2047 | */ |
76ee65bf | 2048 | xmit_skb = skb; |
571ecf67 JB |
2049 | skb = NULL; |
2050 | } | |
571ecf67 JB |
2051 | } |
2052 | } | |
2053 | ||
59d9cb07 | 2054 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2055 | if (skb) { |
2056 | /* 'align' will only take the values 0 or 2 here since all | |
2057 | * frames are required to be aligned to 2-byte boundaries | |
2058 | * when being passed to mac80211; the code here works just | |
2059 | * as well if that isn't true, but mac80211 assumes it can | |
2060 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2061 | */ |
9e890a1f JB |
2062 | int align; |
2063 | ||
2064 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2065 | if (align) { |
2066 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2067 | dev_kfree_skb(skb); | |
2068 | skb = NULL; | |
2069 | } else { | |
2070 | u8 *data = skb->data; | |
8ce0b589 ZY |
2071 | size_t len = skb_headlen(skb); |
2072 | skb->data -= align; | |
2073 | memmove(skb->data, data, len); | |
2074 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2075 | } |
2076 | } | |
9e890a1f | 2077 | } |
d1c3a37c JB |
2078 | #endif |
2079 | ||
9e890a1f JB |
2080 | if (skb) { |
2081 | /* deliver to local stack */ | |
2082 | skb->protocol = eth_type_trans(skb, dev); | |
2083 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
2084 | if (rx->local->napi) |
2085 | napi_gro_receive(rx->local->napi, skb); | |
2086 | else | |
2087 | netif_receive_skb(skb); | |
571ecf67 JB |
2088 | } |
2089 | ||
76ee65bf | 2090 | if (xmit_skb) { |
aef6c928 HS |
2091 | /* |
2092 | * Send to wireless media and increase priority by 256 to | |
2093 | * keep the received priority instead of reclassifying | |
2094 | * the frame (see cfg80211_classify8021d). | |
2095 | */ | |
2096 | xmit_skb->priority += 256; | |
f831e909 | 2097 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2098 | skb_reset_network_header(xmit_skb); |
2099 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2100 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2101 | } |
76ee65bf RR |
2102 | } |
2103 | ||
49461622 | 2104 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2105 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2106 | { |
eb9fb5b8 | 2107 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2108 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2109 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2110 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2111 | struct sk_buff_head frame_list; |
554891e6 | 2112 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2113 | |
358c8d9d | 2114 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2115 | return RX_CONTINUE; |
fd4c7f2f | 2116 | |
358c8d9d | 2117 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2118 | return RX_DROP_MONITOR; |
fd4c7f2f | 2119 | |
554891e6 | 2120 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2121 | return RX_CONTINUE; |
fd4c7f2f | 2122 | |
eaf85ca7 ZY |
2123 | if (ieee80211_has_a4(hdr->frame_control) && |
2124 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2125 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2126 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2127 | |
eaf85ca7 ZY |
2128 | if (is_multicast_ether_addr(hdr->addr1) && |
2129 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2130 | rx->sdata->u.vlan.sta) || | |
2131 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2132 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2133 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2134 | |
eaf85ca7 ZY |
2135 | skb->dev = dev; |
2136 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2137 | |
e3cf8b3f ZY |
2138 | if (skb_linearize(skb)) |
2139 | return RX_DROP_UNUSABLE; | |
2140 | ||
eaf85ca7 ZY |
2141 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2142 | rx->sdata->vif.type, | |
8b3becad | 2143 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2144 | |
eaf85ca7 ZY |
2145 | while (!skb_queue_empty(&frame_list)) { |
2146 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2147 | |
358c8d9d | 2148 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2149 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2150 | continue; |
2151 | } | |
eaf85ca7 ZY |
2152 | dev->stats.rx_packets++; |
2153 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2154 | |
2155 | ieee80211_deliver_skb(rx); | |
2156 | } | |
2157 | ||
9ae54c84 | 2158 | return RX_QUEUED; |
fd4c7f2f RR |
2159 | } |
2160 | ||
bf94e17b | 2161 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2162 | static ieee80211_rx_result |
e32f85f7 LCC |
2163 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2164 | { | |
30789eb6 TP |
2165 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2166 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2167 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2168 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2169 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2170 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2171 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2172 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2173 | u16 q, hdrlen; |
e32f85f7 LCC |
2174 | |
2175 | hdr = (struct ieee80211_hdr *) skb->data; | |
2176 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2177 | |
2178 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2179 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2180 | return RX_DROP_MONITOR; | |
2181 | ||
2182 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2183 | ||
2184 | /* make sure full mesh header is there, also checks skb len */ | |
2185 | if (!pskb_may_pull(rx->skb, | |
2186 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2187 | return RX_DROP_MONITOR; | |
2188 | ||
2189 | /* reload pointers */ | |
2190 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2191 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2192 | ||
2157fdd6 TP |
2193 | /* frame is in RMC, don't forward */ |
2194 | if (ieee80211_is_data(hdr->frame_control) && | |
2195 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2196 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2197 | return RX_DROP_MONITOR; |
2198 | ||
555cb715 JC |
2199 | if (!ieee80211_is_data(hdr->frame_control) || |
2200 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2201 | return RX_CONTINUE; |
2202 | ||
2203 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2204 | return RX_DROP_MONITOR; |
2205 | ||
43b7b314 | 2206 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2207 | struct mesh_path *mppath; |
43b7b314 JC |
2208 | char *proxied_addr; |
2209 | char *mpp_addr; | |
2210 | ||
2211 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2212 | mpp_addr = hdr->addr3; | |
2213 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2214 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2215 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2216 | mpp_addr = hdr->addr4; |
2217 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2218 | } else { |
2219 | return RX_DROP_MONITOR; | |
43b7b314 | 2220 | } |
79617dee | 2221 | |
79617dee | 2222 | rcu_read_lock(); |
bf7cd94d | 2223 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2224 | if (!mppath) { |
bf7cd94d | 2225 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2226 | } else { |
2227 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2228 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2229 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2230 | spin_unlock_bh(&mppath->state_lock); |
2231 | } | |
2232 | rcu_read_unlock(); | |
2233 | } | |
2234 | ||
3c5772a5 JC |
2235 | /* Frame has reached destination. Don't forward */ |
2236 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2237 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2238 | return RX_CONTINUE; |
2239 | ||
00e96dec | 2240 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2241 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2242 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2243 | return RX_DROP_MONITOR; |
2244 | } | |
2245 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2246 | |
30789eb6 TP |
2247 | if (!--mesh_hdr->ttl) { |
2248 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2249 | goto out; |
30789eb6 TP |
2250 | } |
2251 | ||
d665508b CYY |
2252 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2253 | goto out; | |
2254 | ||
30789eb6 TP |
2255 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2256 | if (!fwd_skb) { | |
bdcbd8e0 | 2257 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2258 | sdata->name); |
30789eb6 TP |
2259 | goto out; |
2260 | } | |
2261 | ||
2262 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2263 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2264 | info = IEEE80211_SKB_CB(fwd_skb); |
2265 | memset(info, 0, sizeof(*info)); | |
2266 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2267 | info->control.vif = &rx->sdata->vif; | |
2268 | info->control.jiffies = jiffies; | |
2269 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2270 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2271 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2272 | /* update power mode indication when forwarding */ |
2273 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2274 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2275 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2276 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2277 | } else { | |
2278 | /* unable to resolve next hop */ | |
bf7cd94d | 2279 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2280 | fwd_hdr->addr3, 0, |
2281 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2282 | fwd_hdr->addr2); | |
30789eb6 | 2283 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2284 | kfree_skb(fwd_skb); |
30789eb6 | 2285 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2286 | } |
2287 | ||
30789eb6 TP |
2288 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2289 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2290 | out: |
3c5772a5 | 2291 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2292 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2293 | return RX_CONTINUE; |
2294 | else | |
2295 | return RX_DROP_MONITOR; | |
2296 | } | |
bf94e17b | 2297 | #endif |
e32f85f7 | 2298 | |
49461622 | 2299 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2300 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2301 | { |
eb9fb5b8 | 2302 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2303 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2304 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2305 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2306 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2307 | bool port_control; |
ce3edf6d | 2308 | int err; |
76ee65bf | 2309 | |
358c8d9d | 2310 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2311 | return RX_CONTINUE; |
76ee65bf | 2312 | |
358c8d9d | 2313 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2314 | return RX_DROP_MONITOR; |
76ee65bf | 2315 | |
79c892b8 | 2316 | if (rx->sta) { |
3d6dc343 | 2317 | /* The seqno index has the same property as needed |
79c892b8 JB |
2318 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS |
2319 | * for non-QoS-data frames. Here we know it's a data | |
2320 | * frame, so count MSDUs. | |
2321 | */ | |
3d6dc343 | 2322 | rx->sta->rx_msdu[rx->seqno_idx]++; |
79c892b8 JB |
2323 | } |
2324 | ||
f14543ee | 2325 | /* |
e7f4a940 JB |
2326 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2327 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2328 | */ |
2329 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2330 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2331 | if (rx->sta && | |
2332 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2333 | cfg80211_rx_unexpected_4addr_frame( | |
2334 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2335 | return RX_DROP_MONITOR; |
e7f4a940 | 2336 | } |
f14543ee | 2337 | |
4114fa21 | 2338 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2339 | if (unlikely(err)) |
e4c26add | 2340 | return RX_DROP_UNUSABLE; |
76ee65bf | 2341 | |
358c8d9d | 2342 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2343 | return RX_DROP_MONITOR; |
ce3edf6d | 2344 | |
8a4d32f3 AN |
2345 | /* directly handle TDLS channel switch requests/responses */ |
2346 | if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == | |
2347 | cpu_to_be16(ETH_P_TDLS))) { | |
2348 | struct ieee80211_tdls_data *tf = (void *)rx->skb->data; | |
2349 | ||
2350 | if (pskb_may_pull(rx->skb, | |
2351 | offsetof(struct ieee80211_tdls_data, u)) && | |
2352 | tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && | |
2353 | tf->category == WLAN_CATEGORY_TDLS && | |
2354 | (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || | |
2355 | tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { | |
2356 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TDLS_CHSW; | |
2357 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2358 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
2359 | if (rx->sta) | |
2360 | rx->sta->rx_packets++; | |
2361 | ||
2362 | return RX_QUEUED; | |
2363 | } | |
2364 | } | |
2365 | ||
4114fa21 FF |
2366 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2367 | unlikely(port_control) && sdata->bss) { | |
2368 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2369 | u.ap); | |
2370 | dev = sdata->dev; | |
2371 | rx->sdata = sdata; | |
2372 | } | |
2373 | ||
76ee65bf RR |
2374 | rx->skb->dev = dev; |
2375 | ||
2376 | dev->stats.rx_packets++; | |
2377 | dev->stats.rx_bytes += rx->skb->len; | |
2378 | ||
08ca944e | 2379 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2380 | !is_multicast_ether_addr( |
2381 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2382 | (!local->scanning && | |
2383 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2384 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2385 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2386 | } | |
2387 | ||
76ee65bf | 2388 | ieee80211_deliver_skb(rx); |
571ecf67 | 2389 | |
9ae54c84 | 2390 | return RX_QUEUED; |
571ecf67 JB |
2391 | } |
2392 | ||
49461622 | 2393 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2394 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2395 | { |
71364716 | 2396 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2397 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2398 | struct tid_ampdu_rx *tid_agg_rx; |
2399 | u16 start_seq_num; | |
2400 | u16 tid; | |
2401 | ||
a7767f95 | 2402 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2403 | return RX_CONTINUE; |
71364716 | 2404 | |
a7767f95 | 2405 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2406 | struct { |
2407 | __le16 control, start_seq_num; | |
2408 | } __packed bar_data; | |
2409 | ||
71364716 | 2410 | if (!rx->sta) |
a02ae758 | 2411 | return RX_DROP_MONITOR; |
8ae5977f JB |
2412 | |
2413 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2414 | &bar_data, sizeof(bar_data))) | |
2415 | return RX_DROP_MONITOR; | |
2416 | ||
8ae5977f | 2417 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2418 | |
2419 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2420 | if (!tid_agg_rx) | |
a02ae758 | 2421 | return RX_DROP_MONITOR; |
71364716 | 2422 | |
8ae5977f | 2423 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2424 | |
2425 | /* reset session timer */ | |
20ad19d0 JB |
2426 | if (tid_agg_rx->timeout) |
2427 | mod_timer(&tid_agg_rx->session_timer, | |
2428 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2429 | |
dd318575 | 2430 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2431 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2432 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2433 | start_seq_num, frames); |
dd318575 JB |
2434 | spin_unlock(&tid_agg_rx->reorder_lock); |
2435 | ||
a02ae758 JB |
2436 | kfree_skb(skb); |
2437 | return RX_QUEUED; | |
71364716 RR |
2438 | } |
2439 | ||
08daecae JB |
2440 | /* |
2441 | * After this point, we only want management frames, | |
2442 | * so we can drop all remaining control frames to | |
2443 | * cooked monitor interfaces. | |
2444 | */ | |
2445 | return RX_DROP_MONITOR; | |
71364716 RR |
2446 | } |
2447 | ||
f4f727a6 JM |
2448 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2449 | struct ieee80211_mgmt *mgmt, | |
2450 | size_t len) | |
fea14732 JM |
2451 | { |
2452 | struct ieee80211_local *local = sdata->local; | |
2453 | struct sk_buff *skb; | |
2454 | struct ieee80211_mgmt *resp; | |
2455 | ||
b203ca39 | 2456 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2457 | /* Not to own unicast address */ |
2458 | return; | |
2459 | } | |
2460 | ||
b203ca39 JP |
2461 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2462 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2463 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2464 | return; |
2465 | } | |
2466 | ||
2467 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2468 | /* Too short SA Query request frame */ | |
2469 | return; | |
2470 | } | |
2471 | ||
2472 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2473 | if (skb == NULL) | |
2474 | return; | |
2475 | ||
2476 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2477 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2478 | memset(resp, 0, 24); | |
2479 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2480 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2481 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2482 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2483 | IEEE80211_STYPE_ACTION); | |
2484 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2485 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2486 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2487 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2488 | mgmt->u.action.u.sa_query.trans_id, | |
2489 | WLAN_SA_QUERY_TR_ID_LEN); | |
2490 | ||
62ae67be | 2491 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2492 | } |
2493 | ||
2e161f78 JB |
2494 | static ieee80211_rx_result debug_noinline |
2495 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2496 | { | |
2497 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2498 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2499 | |
2500 | /* | |
2501 | * From here on, look only at management frames. | |
2502 | * Data and control frames are already handled, | |
2503 | * and unknown (reserved) frames are useless. | |
2504 | */ | |
2505 | if (rx->skb->len < 24) | |
2506 | return RX_DROP_MONITOR; | |
2507 | ||
2508 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2509 | return RX_DROP_MONITOR; | |
2510 | ||
ee971924 JB |
2511 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2512 | ieee80211_is_beacon(mgmt->frame_control) && | |
2513 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2514 | int sig = 0; |
2515 | ||
2516 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2517 | sig = status->signal; | |
2518 | ||
ee971924 JB |
2519 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2520 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2521 | status->freq, sig); |
ee971924 JB |
2522 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2523 | } | |
2524 | ||
554891e6 | 2525 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2526 | return RX_DROP_MONITOR; |
2527 | ||
2528 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2529 | return RX_DROP_UNUSABLE; | |
2530 | ||
2531 | return RX_CONTINUE; | |
2532 | } | |
2533 | ||
de1ede7a JB |
2534 | static ieee80211_rx_result debug_noinline |
2535 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2536 | { | |
2537 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2538 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2539 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2540 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2541 | int len = rx->skb->len; |
2542 | ||
2543 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2544 | return RX_CONTINUE; | |
2545 | ||
026331c4 JM |
2546 | /* drop too small frames */ |
2547 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2548 | return RX_DROP_UNUSABLE; |
de1ede7a | 2549 | |
815b8092 | 2550 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2551 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2552 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2553 | return RX_DROP_UNUSABLE; |
de1ede7a | 2554 | |
554891e6 | 2555 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2556 | return RX_DROP_UNUSABLE; |
97ebe12a | 2557 | |
de1ede7a | 2558 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2559 | case WLAN_CATEGORY_HT: |
2560 | /* reject HT action frames from stations not supporting HT */ | |
2561 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2562 | goto invalid; | |
2563 | ||
2564 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2565 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2566 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2567 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2568 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2569 | break; | |
2570 | ||
ec61cd63 | 2571 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2572 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2573 | goto invalid; | |
2574 | ||
2575 | switch (mgmt->u.action.u.ht_smps.action) { | |
2576 | case WLAN_HT_ACTION_SMPS: { | |
2577 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2578 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2579 | |
2580 | /* convert to HT capability */ | |
2581 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2582 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2583 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2584 | break; |
2585 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2586 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2587 | break; |
2588 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2589 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2590 | break; |
2591 | default: | |
2592 | goto invalid; | |
2593 | } | |
1d8d3dec JB |
2594 | |
2595 | /* if no change do nothing */ | |
af0ed69b | 2596 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2597 | goto handled; |
af0ed69b | 2598 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2599 | |
2600 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2601 | ||
64f68e5d JB |
2602 | rate_control_rate_update(local, sband, rx->sta, |
2603 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2604 | goto handled; |
2605 | } | |
ec61cd63 JB |
2606 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2607 | struct ieee80211_supported_band *sband; | |
2608 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
1c45c5ce | 2609 | enum ieee80211_sta_rx_bandwidth max_bw, new_bw; |
ec61cd63 JB |
2610 | |
2611 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2612 | if (!(rx->sta->sta.ht_cap.cap & |
2613 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2614 | goto handled; |
2615 | ||
e1a0c6b3 | 2616 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
1c45c5ce | 2617 | max_bw = IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 2618 | else |
1c45c5ce EP |
2619 | max_bw = ieee80211_sta_cap_rx_bw(rx->sta); |
2620 | ||
2621 | /* set cur_max_bandwidth and recalc sta bw */ | |
2622 | rx->sta->cur_max_bandwidth = max_bw; | |
2623 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2624 | |
e1a0c6b3 | 2625 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2626 | goto handled; |
2627 | ||
1c45c5ce | 2628 | rx->sta->sta.bandwidth = new_bw; |
ec61cd63 JB |
2629 | sband = rx->local->hw.wiphy->bands[status->band]; |
2630 | ||
2631 | rate_control_rate_update(local, sband, rx->sta, | |
2632 | IEEE80211_RC_BW_CHANGED); | |
2633 | goto handled; | |
2634 | } | |
1d8d3dec JB |
2635 | default: |
2636 | goto invalid; | |
2637 | } | |
2638 | ||
0af83d3d | 2639 | break; |
1b3a2e49 JB |
2640 | case WLAN_CATEGORY_PUBLIC: |
2641 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2642 | goto invalid; | |
2643 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2644 | break; | |
2645 | if (!rx->sta) | |
2646 | break; | |
2647 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2648 | break; | |
2649 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2650 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2651 | break; | |
2652 | if (len < offsetof(struct ieee80211_mgmt, | |
2653 | u.action.u.ext_chan_switch.variable)) | |
2654 | goto invalid; | |
2655 | goto queue; | |
0af83d3d JB |
2656 | case WLAN_CATEGORY_VHT: |
2657 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2658 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2659 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2660 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2661 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2662 | break; | |
2663 | ||
2664 | /* verify action code is present */ | |
2665 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2666 | goto invalid; | |
2667 | ||
2668 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2669 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2670 | u8 opmode; | |
2671 | ||
2672 | /* verify opmode is present */ | |
2673 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2674 | goto invalid; | |
2675 | ||
2676 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2677 | ||
2678 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2679 | opmode, status->band, |
2680 | false); | |
0af83d3d JB |
2681 | goto handled; |
2682 | } | |
2683 | default: | |
2684 | break; | |
2685 | } | |
1d8d3dec | 2686 | break; |
de1ede7a | 2687 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2688 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2689 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2690 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2691 | sdata->vif.type != NL80211_IFTYPE_AP && |
2692 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2693 | break; |
8abd3f9b | 2694 | |
026331c4 JM |
2695 | /* verify action_code is present */ |
2696 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2697 | break; | |
2698 | ||
de1ede7a JB |
2699 | switch (mgmt->u.action.u.addba_req.action_code) { |
2700 | case WLAN_ACTION_ADDBA_REQ: | |
2701 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2702 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2703 | goto invalid; |
2704 | break; | |
de1ede7a JB |
2705 | case WLAN_ACTION_ADDBA_RESP: |
2706 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2707 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2708 | goto invalid; |
2709 | break; | |
de1ede7a JB |
2710 | case WLAN_ACTION_DELBA: |
2711 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2712 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2713 | goto invalid; |
2714 | break; | |
2715 | default: | |
2716 | goto invalid; | |
de1ede7a | 2717 | } |
bed7ee6e | 2718 | |
8b58ff83 | 2719 | goto queue; |
39192c0b | 2720 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2721 | /* verify action_code is present */ |
2722 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2723 | break; | |
2724 | ||
39192c0b JB |
2725 | switch (mgmt->u.action.u.measurement.action_code) { |
2726 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2727 | if (status->band != IEEE80211_BAND_5GHZ) |
2728 | break; | |
2729 | ||
39192c0b JB |
2730 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2731 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2732 | break; |
cd7760e6 SW |
2733 | |
2734 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2735 | break; | |
2736 | ||
39192c0b | 2737 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2738 | goto handled; |
cd7760e6 SW |
2739 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2740 | u8 *bssid; | |
2741 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2742 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2743 | break; |
cc32abd4 | 2744 | |
cd7760e6 | 2745 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2746 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2747 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2748 | break; |
2749 | ||
2750 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2751 | bssid = sdata->u.mgd.bssid; | |
2752 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2753 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2754 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2755 | bssid = mgmt->sa; | |
cd7760e6 SW |
2756 | else |
2757 | break; | |
2758 | ||
2759 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2760 | break; |
c481ec97 | 2761 | |
8b58ff83 | 2762 | goto queue; |
cd7760e6 | 2763 | } |
39192c0b JB |
2764 | } |
2765 | break; | |
fea14732 JM |
2766 | case WLAN_CATEGORY_SA_QUERY: |
2767 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2768 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2769 | break; |
2770 | ||
fea14732 JM |
2771 | switch (mgmt->u.action.u.sa_query.action) { |
2772 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2773 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2774 | break; |
fea14732 | 2775 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2776 | goto handled; |
fea14732 JM |
2777 | } |
2778 | break; | |
8db09850 | 2779 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2780 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2781 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2782 | break; | |
2783 | ||
8db09850 TP |
2784 | switch (mgmt->u.action.u.self_prot.action_code) { |
2785 | case WLAN_SP_MESH_PEERING_OPEN: | |
2786 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2787 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2788 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2789 | goto invalid; | |
a6dad6a2 | 2790 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2791 | /* userspace handles this frame */ |
2792 | break; | |
2793 | goto queue; | |
2794 | case WLAN_SP_MGK_INFORM: | |
2795 | case WLAN_SP_MGK_ACK: | |
2796 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2797 | goto invalid; | |
2798 | break; | |
2799 | } | |
2800 | break; | |
d3aaec8a | 2801 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2802 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2803 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2804 | break; | |
2805 | ||
77a121c3 JB |
2806 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2807 | break; | |
25d49e4d | 2808 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2809 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2810 | break; |
2811 | goto queue; | |
84040805 | 2812 | } |
026331c4 | 2813 | |
2e161f78 JB |
2814 | return RX_CONTINUE; |
2815 | ||
bed7ee6e | 2816 | invalid: |
554891e6 | 2817 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2818 | /* will return in the next handlers */ |
2819 | return RX_CONTINUE; | |
2820 | ||
2821 | handled: | |
2822 | if (rx->sta) | |
2823 | rx->sta->rx_packets++; | |
2824 | dev_kfree_skb(rx->skb); | |
2825 | return RX_QUEUED; | |
2826 | ||
2827 | queue: | |
2828 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2829 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2830 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2831 | if (rx->sta) | |
2832 | rx->sta->rx_packets++; | |
2833 | return RX_QUEUED; | |
2834 | } | |
2835 | ||
2836 | static ieee80211_rx_result debug_noinline | |
2837 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2838 | { | |
554891e6 | 2839 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2840 | int sig = 0; |
2e161f78 JB |
2841 | |
2842 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2843 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2844 | return RX_CONTINUE; |
d7907448 | 2845 | |
026331c4 JM |
2846 | /* |
2847 | * Getting here means the kernel doesn't know how to handle | |
2848 | * it, but maybe userspace does ... include returned frames | |
2849 | * so userspace can register for those to know whether ones | |
2850 | * it transmitted were processed or returned. | |
2851 | */ | |
026331c4 | 2852 | |
804483e9 JB |
2853 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2854 | sig = status->signal; | |
2855 | ||
71bbc994 | 2856 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2857 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 JB |
2858 | if (rx->sta) |
2859 | rx->sta->rx_packets++; | |
2860 | dev_kfree_skb(rx->skb); | |
2861 | return RX_QUEUED; | |
2862 | } | |
2863 | ||
2e161f78 JB |
2864 | return RX_CONTINUE; |
2865 | } | |
2866 | ||
2867 | static ieee80211_rx_result debug_noinline | |
2868 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2869 | { | |
2870 | struct ieee80211_local *local = rx->local; | |
2871 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2872 | struct sk_buff *nskb; | |
2873 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2874 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2875 | |
2876 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2877 | return RX_CONTINUE; | |
2878 | ||
2879 | /* | |
2880 | * For AP mode, hostapd is responsible for handling any action | |
2881 | * frames that we didn't handle, including returning unknown | |
2882 | * ones. For all other modes we will return them to the sender, | |
2883 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2884 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2885 | * Newer versions of hostapd shall also use the management frame |
2886 | * registration mechanisms, but older ones still use cooked | |
2887 | * monitor interfaces so push all frames there. | |
2888 | */ | |
554891e6 | 2889 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2890 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2891 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2892 | return RX_DROP_MONITOR; | |
026331c4 | 2893 | |
4b5ebccc JB |
2894 | if (is_multicast_ether_addr(mgmt->da)) |
2895 | return RX_DROP_MONITOR; | |
2896 | ||
84040805 JB |
2897 | /* do not return rejected action frames */ |
2898 | if (mgmt->u.action.category & 0x80) | |
2899 | return RX_DROP_UNUSABLE; | |
2900 | ||
2901 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2902 | GFP_ATOMIC); | |
2903 | if (nskb) { | |
292b4df6 | 2904 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2905 | |
292b4df6 JL |
2906 | nmgmt->u.action.category |= 0x80; |
2907 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2908 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2909 | |
2910 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2911 | ||
07e5a5f5 JB |
2912 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2913 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2914 | ||
2915 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2916 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2917 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2918 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2919 | info->hw_queue = | |
2920 | local->hw.offchannel_tx_hw_queue; | |
2921 | } | |
2922 | ||
2923 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2924 | status->band); | |
de1ede7a | 2925 | } |
39192c0b JB |
2926 | dev_kfree_skb(rx->skb); |
2927 | return RX_QUEUED; | |
de1ede7a JB |
2928 | } |
2929 | ||
49461622 | 2930 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2931 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2932 | { |
eb9fb5b8 | 2933 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2934 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2935 | __le16 stype; | |
571ecf67 | 2936 | |
77a121c3 | 2937 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2938 | |
77a121c3 JB |
2939 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2940 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 2941 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
2942 | sdata->vif.type != NL80211_IFTYPE_STATION) |
2943 | return RX_DROP_MONITOR; | |
472dbc45 | 2944 | |
77a121c3 | 2945 | switch (stype) { |
66e67e41 | 2946 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2947 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2948 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2949 | /* process for all: mesh, mlme, ibss */ | |
2950 | break; | |
66e67e41 JB |
2951 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2952 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2953 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2954 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2955 | if (is_multicast_ether_addr(mgmt->da) && |
2956 | !is_broadcast_ether_addr(mgmt->da)) | |
2957 | return RX_DROP_MONITOR; | |
2958 | ||
77a121c3 JB |
2959 | /* process only for station */ |
2960 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2961 | return RX_DROP_MONITOR; | |
2962 | break; | |
2963 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2964 | /* process only for ibss and mesh */ |
2965 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2966 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2967 | return RX_DROP_MONITOR; |
2968 | break; | |
2969 | default: | |
2970 | return RX_DROP_MONITOR; | |
2971 | } | |
f9d540ee | 2972 | |
77a121c3 | 2973 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2974 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2975 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2976 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2977 | if (rx->sta) |
2978 | rx->sta->rx_packets++; | |
46900298 | 2979 | |
77a121c3 | 2980 | return RX_QUEUED; |
571ecf67 JB |
2981 | } |
2982 | ||
5cf121c3 | 2983 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2984 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2985 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2986 | { |
2987 | struct ieee80211_sub_if_data *sdata; | |
2988 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2989 | struct sk_buff *skb = rx->skb, *skb2; |
2990 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2991 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2992 | int needed_headroom; |
3d30d949 | 2993 | |
554891e6 JB |
2994 | /* |
2995 | * If cooked monitor has been processed already, then | |
2996 | * don't do it again. If not, set the flag. | |
2997 | */ | |
2998 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2999 | goto out_free_skb; |
554891e6 | 3000 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 3001 | |
152c477a JB |
3002 | /* If there are no cooked monitor interfaces, just free the SKB */ |
3003 | if (!local->cooked_mntrs) | |
3004 | goto out_free_skb; | |
3005 | ||
1f7bba79 JB |
3006 | /* vendor data is long removed here */ |
3007 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 3008 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 3009 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 3010 | |
293702a3 JB |
3011 | if (skb_headroom(skb) < needed_headroom && |
3012 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
3013 | goto out_free_skb; | |
3d30d949 | 3014 | |
293702a3 | 3015 | /* prepend radiotap information */ |
973ef21a FF |
3016 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
3017 | false); | |
3d30d949 MW |
3018 | |
3019 | skb_set_mac_header(skb, 0); | |
3020 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3021 | skb->pkt_type = PACKET_OTHERHOST; | |
3022 | skb->protocol = htons(ETH_P_802_2); | |
3023 | ||
3024 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 3025 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
3026 | continue; |
3027 | ||
05c914fe | 3028 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
3029 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
3030 | continue; | |
3031 | ||
3032 | if (prev_dev) { | |
3033 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3034 | if (skb2) { | |
3035 | skb2->dev = prev_dev; | |
5548a8a1 | 3036 | netif_receive_skb(skb2); |
3d30d949 MW |
3037 | } |
3038 | } | |
3039 | ||
3040 | prev_dev = sdata->dev; | |
3041 | sdata->dev->stats.rx_packets++; | |
3042 | sdata->dev->stats.rx_bytes += skb->len; | |
3043 | } | |
3044 | ||
3045 | if (prev_dev) { | |
3046 | skb->dev = prev_dev; | |
5548a8a1 | 3047 | netif_receive_skb(skb); |
554891e6 JB |
3048 | return; |
3049 | } | |
3d30d949 MW |
3050 | |
3051 | out_free_skb: | |
3052 | dev_kfree_skb(skb); | |
3053 | } | |
3054 | ||
aa0c8636 CL |
3055 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3056 | ieee80211_rx_result res) | |
3057 | { | |
3058 | switch (res) { | |
3059 | case RX_DROP_MONITOR: | |
3060 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3061 | if (rx->sta) | |
3062 | rx->sta->rx_dropped++; | |
3063 | /* fall through */ | |
3064 | case RX_CONTINUE: { | |
3065 | struct ieee80211_rate *rate = NULL; | |
3066 | struct ieee80211_supported_band *sband; | |
3067 | struct ieee80211_rx_status *status; | |
3068 | ||
3069 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3070 | ||
3071 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3072 | if (!(status->flag & RX_FLAG_HT) && |
3073 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3074 | rate = &sband->bitrates[status->rate_idx]; |
3075 | ||
3076 | ieee80211_rx_cooked_monitor(rx, rate); | |
3077 | break; | |
3078 | } | |
3079 | case RX_DROP_UNUSABLE: | |
3080 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3081 | if (rx->sta) | |
3082 | rx->sta->rx_dropped++; | |
3083 | dev_kfree_skb(rx->skb); | |
3084 | break; | |
3085 | case RX_QUEUED: | |
3086 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3087 | break; | |
3088 | } | |
3089 | } | |
571ecf67 | 3090 | |
f9e124fb CL |
3091 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3092 | struct sk_buff_head *frames) | |
58905290 | 3093 | { |
58905290 | 3094 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3095 | struct sk_buff *skb; |
8944b79f | 3096 | |
e32f85f7 LCC |
3097 | #define CALL_RXH(rxh) \ |
3098 | do { \ | |
3099 | res = rxh(rx); \ | |
3100 | if (res != RX_CONTINUE) \ | |
2569a826 | 3101 | goto rxh_next; \ |
e32f85f7 | 3102 | } while (0); |
49461622 | 3103 | |
f9e124fb | 3104 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3105 | |
f9e124fb | 3106 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3107 | /* |
3108 | * all the other fields are valid across frames | |
3109 | * that belong to an aMPDU since they are on the | |
3110 | * same TID from the same station | |
3111 | */ | |
3112 | rx->skb = skb; | |
3113 | ||
2569a826 | 3114 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3115 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3116 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3117 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3118 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3119 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3120 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3121 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3122 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3123 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3124 | #endif |
2154c81c | 3125 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3126 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3127 | |
3128 | /* special treatment -- needs the queue */ | |
3129 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3130 | if (res != RX_CONTINUE) | |
3131 | goto rxh_next; | |
3132 | ||
2e161f78 | 3133 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3134 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3135 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3136 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3137 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3138 | |
aa0c8636 CL |
3139 | rxh_next: |
3140 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3141 | |
49461622 | 3142 | #undef CALL_RXH |
aa0c8636 | 3143 | } |
24a8fdad | 3144 | |
f9e124fb | 3145 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3146 | } |
3147 | ||
4406c376 | 3148 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3149 | { |
f9e124fb | 3150 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3151 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3152 | ||
f9e124fb CL |
3153 | __skb_queue_head_init(&reorder_release); |
3154 | ||
aa0c8636 CL |
3155 | #define CALL_RXH(rxh) \ |
3156 | do { \ | |
3157 | res = rxh(rx); \ | |
3158 | if (res != RX_CONTINUE) \ | |
3159 | goto rxh_next; \ | |
3160 | } while (0); | |
3161 | ||
0395442a | 3162 | CALL_RXH(ieee80211_rx_h_check_dup) |
aa0c8636 CL |
3163 | CALL_RXH(ieee80211_rx_h_check) |
3164 | ||
f9e124fb | 3165 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3166 | |
f9e124fb | 3167 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3168 | return; |
49461622 | 3169 | |
2569a826 | 3170 | rxh_next: |
aa0c8636 CL |
3171 | ieee80211_rx_handlers_result(rx, res); |
3172 | ||
3173 | #undef CALL_RXH | |
58905290 JB |
3174 | } |
3175 | ||
2bff8ebf | 3176 | /* |
dd318575 JB |
3177 | * This function makes calls into the RX path, therefore |
3178 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3179 | */ |
3180 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3181 | { | |
f9e124fb | 3182 | struct sk_buff_head frames; |
554891e6 JB |
3183 | struct ieee80211_rx_data rx = { |
3184 | .sta = sta, | |
3185 | .sdata = sta->sdata, | |
3186 | .local = sta->local, | |
9e26297a JB |
3187 | /* This is OK -- must be QoS data frame */ |
3188 | .security_idx = tid, | |
3189 | .seqno_idx = tid, | |
fcf8bd3b | 3190 | .flags = 0, |
554891e6 | 3191 | }; |
2c15a0cf CL |
3192 | struct tid_ampdu_rx *tid_agg_rx; |
3193 | ||
3194 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3195 | if (!tid_agg_rx) | |
3196 | return; | |
2bff8ebf | 3197 | |
f9e124fb CL |
3198 | __skb_queue_head_init(&frames); |
3199 | ||
2c15a0cf | 3200 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3201 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3202 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3203 | |
f9e124fb | 3204 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3205 | } |
3206 | ||
571ecf67 JB |
3207 | /* main receive path */ |
3208 | ||
3c2723f5 JB |
3209 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3210 | struct ieee80211_hdr *hdr) | |
23a24def | 3211 | { |
20b01f80 | 3212 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3213 | struct sk_buff *skb = rx->skb; |
3214 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3215 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3216 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3217 | ||
51fb61e7 | 3218 | switch (sdata->vif.type) { |
05c914fe | 3219 | case NL80211_IFTYPE_STATION: |
9bc383de | 3220 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3221 | return false; |
77fdaa12 | 3222 | if (!multicast && |
b203ca39 | 3223 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3224 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3225 | sdata->u.mgd.use_4addr) | |
3c2723f5 | 3226 | return false; |
554891e6 | 3227 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3228 | } |
3229 | break; | |
05c914fe | 3230 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3231 | if (!bssid) |
3c2723f5 | 3232 | return false; |
6329b8d9 FF |
3233 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3234 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3235 | return false; |
a7767f95 | 3236 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3237 | return true; |
d48b2968 | 3238 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3239 | return false; |
23a24def | 3240 | } else if (!multicast && |
b203ca39 | 3241 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3242 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3243 | return false; |
554891e6 | 3244 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3245 | } else if (!rx->sta) { |
3246 | int rate_idx; | |
5614618e JB |
3247 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3248 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3249 | else |
eb9fb5b8 | 3250 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3251 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3252 | BIT(rate_idx)); | |
0fb8ca45 | 3253 | } |
23a24def | 3254 | break; |
239281f8 RL |
3255 | case NL80211_IFTYPE_OCB: |
3256 | if (!bssid) | |
3257 | return false; | |
3258 | if (ieee80211_is_beacon(hdr->frame_control)) { | |
3259 | return false; | |
3260 | } else if (!is_broadcast_ether_addr(bssid)) { | |
3261 | ocb_dbg(sdata, "BSSID mismatch in OCB mode!\n"); | |
3262 | return false; | |
3263 | } else if (!multicast && | |
3264 | !ether_addr_equal(sdata->dev->dev_addr, | |
3265 | hdr->addr1)) { | |
3266 | /* if we are in promisc mode we also accept | |
3267 | * packets not destined for us | |
3268 | */ | |
3269 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
3270 | return false; | |
3271 | rx->flags &= ~IEEE80211_RX_RA_MATCH; | |
3272 | } else if (!rx->sta) { | |
3273 | int rate_idx; | |
3274 | if (status->flag & RX_FLAG_HT) | |
3275 | rate_idx = 0; /* TODO: HT rates */ | |
3276 | else | |
3277 | rate_idx = status->rate_idx; | |
3278 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3279 | BIT(rate_idx)); | |
3280 | } | |
3281 | break; | |
05c914fe | 3282 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3283 | if (!multicast && |
b203ca39 | 3284 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 | 3285 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3286 | return false; |
6032f934 | 3287 | |
554891e6 | 3288 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3289 | } |
3290 | break; | |
05c914fe JB |
3291 | case NL80211_IFTYPE_AP_VLAN: |
3292 | case NL80211_IFTYPE_AP: | |
23a24def | 3293 | if (!bssid) { |
b203ca39 | 3294 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3295 | return false; |
f142c6b9 | 3296 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3297 | /* |
3298 | * Accept public action frames even when the | |
3299 | * BSSID doesn't match, this is used for P2P | |
3300 | * and location updates. Note that mac80211 | |
3301 | * itself never looks at these frames. | |
3302 | */ | |
2b9ccd4e JB |
3303 | if (!multicast && |
3304 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3305 | return false; |
d48b2968 | 3306 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3307 | return true; |
d48b2968 | 3308 | if (!ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3309 | return false; |
554891e6 | 3310 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
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; |
1b737f88 JB |
3333 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3334 | !multicast) | |
f142c6b9 JB |
3335 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3336 | break; | |
2ca27bcf | 3337 | default: |
fb1c1cd6 | 3338 | /* should never get here */ |
f142c6b9 | 3339 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3340 | break; |
23a24def JB |
3341 | } |
3342 | ||
3c2723f5 | 3343 | return true; |
23a24def JB |
3344 | } |
3345 | ||
4406c376 JB |
3346 | /* |
3347 | * This function returns whether or not the SKB | |
3348 | * was destined for RX processing or not, which, | |
3349 | * if consume is true, is equivalent to whether | |
3350 | * or not the skb was consumed. | |
3351 | */ | |
3352 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3353 | struct sk_buff *skb, bool consume) | |
3354 | { | |
3355 | struct ieee80211_local *local = rx->local; | |
3356 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3357 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3358 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3359 | |
3360 | rx->skb = skb; | |
554891e6 | 3361 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3362 | |
40791942 | 3363 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3364 | return false; |
3365 | ||
4406c376 JB |
3366 | if (!consume) { |
3367 | skb = skb_copy(skb, GFP_ATOMIC); | |
3368 | if (!skb) { | |
3369 | if (net_ratelimit()) | |
3370 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3371 | "failed to copy skb for %s\n", |
4406c376 JB |
3372 | sdata->name); |
3373 | return true; | |
3374 | } | |
3375 | ||
3376 | rx->skb = skb; | |
3377 | } | |
3378 | ||
3379 | ieee80211_invoke_rx_handlers(rx); | |
3380 | return true; | |
3381 | } | |
3382 | ||
571ecf67 | 3383 | /* |
6b59db7d | 3384 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3385 | * be called with rcu_read_lock protection. |
571ecf67 | 3386 | */ |
71ebb4aa | 3387 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3388 | struct sk_buff *skb) |
571ecf67 JB |
3389 | { |
3390 | struct ieee80211_local *local = hw_to_local(hw); | |
3391 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3392 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3393 | __le16 fc; |
5cf121c3 | 3394 | struct ieee80211_rx_data rx; |
4406c376 | 3395 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3396 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3397 | int err = 0; |
571ecf67 | 3398 | |
e3cf8b3f | 3399 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3400 | memset(&rx, 0, sizeof(rx)); |
3401 | rx.skb = skb; | |
3402 | rx.local = local; | |
72abd81b | 3403 | |
e3cf8b3f | 3404 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3405 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3406 | |
4a4f1a58 JB |
3407 | if (ieee80211_is_mgmt(fc)) { |
3408 | /* drop frame if too short for header */ | |
3409 | if (skb->len < ieee80211_hdrlen(fc)) | |
3410 | err = -ENOBUFS; | |
3411 | else | |
3412 | err = skb_linearize(skb); | |
3413 | } else { | |
e3cf8b3f | 3414 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3415 | } |
e3cf8b3f ZY |
3416 | |
3417 | if (err) { | |
3418 | dev_kfree_skb(skb); | |
3419 | return; | |
3420 | } | |
3421 | ||
3422 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3423 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3424 | ieee80211_verify_alignment(&rx); |
38f3714d | 3425 | |
d48b2968 JB |
3426 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3427 | ieee80211_is_beacon(hdr->frame_control))) | |
3428 | ieee80211_scan_rx(local, skb); | |
3429 | ||
e3cf8b3f | 3430 | if (ieee80211_is_data(fc)) { |
56af3268 | 3431 | prev_sta = NULL; |
4406c376 | 3432 | |
7852e361 | 3433 | for_each_sta_info(local, 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); |