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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
571ecf67 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
ab46623e | 12 | #include <linux/jiffies.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
571ecf67 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/etherdevice.h> | |
d4e46a3d | 18 | #include <linux/rcupdate.h> |
bc3b2d7f | 19 | #include <linux/export.h> |
571ecf67 JB |
20 | #include <net/mac80211.h> |
21 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 22 | #include <asm/unaligned.h> |
571ecf67 JB |
23 | |
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
2c8dccc7 | 26 | #include "led.h" |
33b64eb2 | 27 | #include "mesh.h" |
571ecf67 JB |
28 | #include "wep.h" |
29 | #include "wpa.h" | |
30 | #include "tkip.h" | |
31 | #include "wme.h" | |
1d8d3dec | 32 | #include "rate.h" |
571ecf67 | 33 | |
b2e7771e JB |
34 | /* |
35 | * monitor mode reception | |
36 | * | |
37 | * This function cleans up the SKB, i.e. it removes all the stuff | |
38 | * only useful for monitoring. | |
39 | */ | |
40 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
0869aea0 | 41 | struct sk_buff *skb) |
b2e7771e | 42 | { |
90b9e446 JB |
43 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
44 | ||
b2e7771e JB |
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
46 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
48 | else { |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
0624760c | 52 | return NULL; |
b2e7771e JB |
53 | } |
54 | } | |
55 | ||
90b9e446 JB |
56 | if (status->vendor_radiotap_len) |
57 | __pskb_pull(skb, status->vendor_radiotap_len); | |
58 | ||
b2e7771e JB |
59 | return skb; |
60 | } | |
61 | ||
1df332e8 | 62 | static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 63 | { |
f1d58c25 | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
605f1a5b JB |
65 | struct ieee80211_hdr *hdr; |
66 | ||
67 | hdr = (void *)(skb->data + status->vendor_radiotap_len); | |
b2e7771e | 68 | |
4c298677 JB |
69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
70 | RX_FLAG_FAILED_PLCP_CRC | | |
71 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
b2e7771e | 72 | return 1; |
605f1a5b JB |
73 | if (unlikely(skb->len < 16 + present_fcs_len + |
74 | status->vendor_radiotap_len)) | |
b2e7771e | 75 | return 1; |
87228f57 HH |
76 | if (ieee80211_is_ctl(hdr->frame_control) && |
77 | !ieee80211_is_pspoll(hdr->frame_control) && | |
78 | !ieee80211_is_back_req(hdr->frame_control)) | |
b2e7771e JB |
79 | return 1; |
80 | return 0; | |
81 | } | |
82 | ||
601ae7f2 | 83 | static int |
90b9e446 JB |
84 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
85 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
86 | { |
87 | int len; | |
88 | ||
89 | /* always present fields */ | |
90 | len = sizeof(struct ieee80211_radiotap_header) + 9; | |
91 | ||
90b9e446 JB |
92 | /* allocate extra bitmap */ |
93 | if (status->vendor_radiotap_len) | |
94 | len += 4; | |
95 | ||
96 | if (ieee80211_have_rx_timestamp(status)) { | |
97 | len = ALIGN(len, 8); | |
601ae7f2 | 98 | len += 8; |
90b9e446 | 99 | } |
7fee5372 | 100 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 101 | len += 1; |
601ae7f2 | 102 | |
90b9e446 JB |
103 | /* padding for RX_FLAGS if necessary */ |
104 | len = ALIGN(len, 2); | |
601ae7f2 | 105 | |
6d744bac JB |
106 | if (status->flag & RX_FLAG_HT) /* HT info */ |
107 | len += 3; | |
108 | ||
4c298677 | 109 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 110 | len = ALIGN(len, 4); |
4c298677 JB |
111 | len += 8; |
112 | } | |
113 | ||
51648921 JB |
114 | if (status->flag & RX_FLAG_VHT) { |
115 | len = ALIGN(len, 2); | |
116 | len += 12; | |
117 | } | |
118 | ||
90b9e446 JB |
119 | if (status->vendor_radiotap_len) { |
120 | if (WARN_ON_ONCE(status->vendor_radiotap_align == 0)) | |
121 | status->vendor_radiotap_align = 1; | |
122 | /* align standard part of vendor namespace */ | |
123 | len = ALIGN(len, 2); | |
124 | /* allocate standard part of vendor namespace */ | |
125 | len += 6; | |
126 | /* align vendor-defined part */ | |
127 | len = ALIGN(len, status->vendor_radiotap_align); | |
128 | /* vendor-defined part is already in skb */ | |
129 | } | |
130 | ||
601ae7f2 BR |
131 | return len; |
132 | } | |
133 | ||
00ea6deb | 134 | /* |
601ae7f2 BR |
135 | * ieee80211_add_rx_radiotap_header - add radiotap header |
136 | * | |
137 | * add a radiotap header containing all the fields which the hardware provided. | |
138 | */ | |
139 | static void | |
140 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
141 | struct sk_buff *skb, | |
601ae7f2 | 142 | struct ieee80211_rate *rate, |
973ef21a | 143 | int rtap_len, bool has_fcs) |
601ae7f2 | 144 | { |
f1d58c25 | 145 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
146 | struct ieee80211_radiotap_header *rthdr; |
147 | unsigned char *pos; | |
6a86b9c7 | 148 | u16 rx_flags = 0; |
f4bda337 TP |
149 | int mpdulen; |
150 | ||
151 | mpdulen = skb->len; | |
152 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
153 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
154 | |
155 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
156 | memset(rthdr, 0, rtap_len); | |
157 | ||
158 | /* radiotap header, set always present flags */ | |
159 | rthdr->it_present = | |
160 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
601ae7f2 BR |
161 | (1 << IEEE80211_RADIOTAP_CHANNEL) | |
162 | (1 << IEEE80211_RADIOTAP_ANTENNA) | | |
163 | (1 << IEEE80211_RADIOTAP_RX_FLAGS)); | |
90b9e446 | 164 | rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len); |
601ae7f2 | 165 | |
1df332e8 | 166 | pos = (unsigned char *)(rthdr + 1); |
601ae7f2 | 167 | |
90b9e446 JB |
168 | if (status->vendor_radiotap_len) { |
169 | rthdr->it_present |= | |
170 | cpu_to_le32(BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE)) | | |
171 | cpu_to_le32(BIT(IEEE80211_RADIOTAP_EXT)); | |
172 | put_unaligned_le32(status->vendor_radiotap_bitmap, pos); | |
173 | pos += 4; | |
174 | } | |
175 | ||
601ae7f2 BR |
176 | /* the order of the following fields is important */ |
177 | ||
178 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 179 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
180 | /* padding */ |
181 | while ((pos - (u8 *)rthdr) & 7) | |
182 | *pos++ = 0; | |
f4bda337 TP |
183 | put_unaligned_le64( |
184 | ieee80211_calculate_rx_timestamp(local, status, | |
185 | mpdulen, 0), | |
186 | pos); | |
1df332e8 | 187 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
188 | pos += 8; |
189 | } | |
190 | ||
191 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 192 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 193 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
194 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
195 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
196 | if (status->flag & RX_FLAG_SHORTPRE) |
197 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
198 | pos++; |
199 | ||
200 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 201 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 202 | /* |
f8d1ccf1 | 203 | * Without rate information don't add it. If we have, |
38f37be2 | 204 | * MCS information is a separate field in radiotap, |
73b48099 JB |
205 | * added below. The byte here is needed as padding |
206 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
207 | */ |
208 | *pos = 0; | |
8d6f658e | 209 | } else { |
ebe6c7ba | 210 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
0fb8ca45 | 211 | *pos = rate->bitrate / 5; |
8d6f658e | 212 | } |
601ae7f2 BR |
213 | pos++; |
214 | ||
215 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 216 | put_unaligned_le16(status->freq, pos); |
601ae7f2 BR |
217 | pos += 2; |
218 | if (status->band == IEEE80211_BAND_5GHZ) | |
6a86b9c7 JB |
219 | put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ, |
220 | pos); | |
5614618e | 221 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
5f0b7de5 JB |
222 | put_unaligned_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ, |
223 | pos); | |
f8d1ccf1 | 224 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
6a86b9c7 JB |
225 | put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ, |
226 | pos); | |
f8d1ccf1 | 227 | else if (rate) |
6a86b9c7 JB |
228 | put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ, |
229 | pos); | |
f8d1ccf1 JB |
230 | else |
231 | put_unaligned_le16(IEEE80211_CHAN_2GHZ, pos); | |
601ae7f2 BR |
232 | pos += 2; |
233 | ||
234 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
235 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
236 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
237 | *pos = status->signal; |
238 | rthdr->it_present |= | |
239 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
240 | pos++; | |
241 | } | |
242 | ||
601ae7f2 BR |
243 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
244 | ||
245 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
246 | *pos = status->antenna; | |
247 | pos++; | |
248 | ||
601ae7f2 BR |
249 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
250 | ||
251 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
252 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 253 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 254 | *pos++ = 0; |
aae89831 | 255 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
256 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
257 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 258 | pos += 2; |
6d744bac JB |
259 | |
260 | if (status->flag & RX_FLAG_HT) { | |
261 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); | |
ac55d2fe | 262 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
263 | *pos = 0; |
264 | if (status->flag & RX_FLAG_SHORT_GI) | |
265 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
266 | if (status->flag & RX_FLAG_40MHZ) | |
267 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
268 | if (status->flag & RX_FLAG_HT_GF) |
269 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
6d744bac JB |
270 | pos++; |
271 | *pos++ = status->rate_idx; | |
272 | } | |
4c298677 JB |
273 | |
274 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
275 | u16 flags = 0; | |
276 | ||
277 | /* ensure 4 byte alignment */ | |
278 | while ((pos - (u8 *)rthdr) & 3) | |
279 | pos++; | |
280 | rthdr->it_present |= | |
281 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
282 | put_unaligned_le32(status->ampdu_reference, pos); | |
283 | pos += 4; | |
284 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
285 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
286 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
287 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
288 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
289 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
290 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
291 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
292 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
293 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
294 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
295 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
296 | put_unaligned_le16(flags, pos); | |
297 | pos += 2; | |
298 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
299 | *pos++ = status->ampdu_delimiter_crc; | |
300 | else | |
301 | *pos++ = 0; | |
302 | *pos++ = 0; | |
303 | } | |
90b9e446 | 304 | |
51648921 JB |
305 | if (status->flag & RX_FLAG_VHT) { |
306 | u16 known = local->hw.radiotap_vht_details; | |
307 | ||
308 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
309 | /* known field - how to handle 80+80? */ | |
310 | if (status->flag & RX_FLAG_80P80MHZ) | |
311 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; | |
312 | put_unaligned_le16(known, pos); | |
313 | pos += 2; | |
314 | /* flags */ | |
315 | if (status->flag & RX_FLAG_SHORT_GI) | |
316 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
317 | pos++; | |
318 | /* bandwidth */ | |
319 | if (status->flag & RX_FLAG_80MHZ) | |
320 | *pos++ = 4; | |
321 | else if (status->flag & RX_FLAG_80P80MHZ) | |
322 | *pos++ = 0; /* marked not known above */ | |
323 | else if (status->flag & RX_FLAG_160MHZ) | |
324 | *pos++ = 11; | |
325 | else if (status->flag & RX_FLAG_40MHZ) | |
326 | *pos++ = 1; | |
327 | else /* 20 MHz */ | |
328 | *pos++ = 0; | |
329 | /* MCS/NSS */ | |
330 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
331 | pos += 4; | |
332 | /* coding field */ | |
333 | pos++; | |
334 | /* group ID */ | |
335 | pos++; | |
336 | /* partial_aid */ | |
337 | pos += 2; | |
338 | } | |
339 | ||
90b9e446 JB |
340 | if (status->vendor_radiotap_len) { |
341 | /* ensure 2 byte alignment for the vendor field as required */ | |
342 | if ((pos - (u8 *)rthdr) & 1) | |
343 | *pos++ = 0; | |
344 | *pos++ = status->vendor_radiotap_oui[0]; | |
345 | *pos++ = status->vendor_radiotap_oui[1]; | |
346 | *pos++ = status->vendor_radiotap_oui[2]; | |
347 | *pos++ = status->vendor_radiotap_subns; | |
348 | put_unaligned_le16(status->vendor_radiotap_len, pos); | |
349 | pos += 2; | |
350 | /* align the actual payload as requested */ | |
351 | while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1)) | |
352 | *pos++ = 0; | |
353 | } | |
601ae7f2 BR |
354 | } |
355 | ||
b2e7771e JB |
356 | /* |
357 | * This function copies a received frame to all monitor interfaces and | |
358 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
359 | * radiotap header the driver might have added. | |
360 | */ | |
361 | static struct sk_buff * | |
362 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 363 | struct ieee80211_rate *rate) |
b2e7771e | 364 | { |
f1d58c25 | 365 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 366 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 367 | int needed_headroom; |
b2e7771e JB |
368 | struct sk_buff *skb, *skb2; |
369 | struct net_device *prev_dev = NULL; | |
370 | int present_fcs_len = 0; | |
b2e7771e JB |
371 | |
372 | /* | |
373 | * First, we may need to make a copy of the skb because | |
374 | * (1) we need to modify it for radiotap (if not present), and | |
375 | * (2) the other RX handlers will modify the skb we got. | |
376 | * | |
377 | * We don't need to, of course, if we aren't going to return | |
378 | * the SKB because it has a bad FCS/PLCP checksum. | |
379 | */ | |
0869aea0 | 380 | |
b2e7771e JB |
381 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
382 | present_fcs_len = FCS_LEN; | |
383 | ||
605f1a5b JB |
384 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
385 | if (!pskb_may_pull(origskb, 2 + status->vendor_radiotap_len)) { | |
e3cf8b3f ZY |
386 | dev_kfree_skb(origskb); |
387 | return NULL; | |
388 | } | |
389 | ||
b2e7771e | 390 | if (!local->monitors) { |
0869aea0 | 391 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
392 | dev_kfree_skb(origskb); |
393 | return NULL; | |
394 | } | |
395 | ||
0869aea0 | 396 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
397 | } |
398 | ||
751413ea HS |
399 | /* room for the radiotap header based on driver features */ |
400 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
401 | ||
0869aea0 | 402 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
403 | /* only need to expand headroom if necessary */ |
404 | skb = origskb; | |
405 | origskb = NULL; | |
406 | ||
407 | /* | |
408 | * This shouldn't trigger often because most devices have an | |
409 | * RX header they pull before we get here, and that should | |
410 | * be big enough for our radiotap information. We should | |
411 | * probably export the length to drivers so that we can have | |
412 | * them allocate enough headroom to start with. | |
413 | */ | |
414 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 415 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
416 | dev_kfree_skb(skb); |
417 | return NULL; | |
418 | } | |
419 | } else { | |
420 | /* | |
421 | * Need to make a copy and possibly remove radiotap header | |
422 | * and FCS from the original. | |
423 | */ | |
424 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
425 | ||
0869aea0 | 426 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
427 | |
428 | if (!skb) | |
429 | return origskb; | |
430 | } | |
431 | ||
0869aea0 | 432 | /* prepend radiotap information */ |
973ef21a FF |
433 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
434 | true); | |
b2e7771e | 435 | |
ce3edf6d | 436 | skb_reset_mac_header(skb); |
b2e7771e JB |
437 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
438 | skb->pkt_type = PACKET_OTHERHOST; | |
439 | skb->protocol = htons(ETH_P_802_2); | |
440 | ||
441 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 442 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
443 | continue; |
444 | ||
3d30d949 MW |
445 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
446 | continue; | |
447 | ||
9607e6b6 | 448 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
449 | continue; |
450 | ||
b2e7771e JB |
451 | if (prev_dev) { |
452 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
453 | if (skb2) { | |
454 | skb2->dev = prev_dev; | |
5548a8a1 | 455 | netif_receive_skb(skb2); |
b2e7771e JB |
456 | } |
457 | } | |
458 | ||
459 | prev_dev = sdata->dev; | |
460 | sdata->dev->stats.rx_packets++; | |
461 | sdata->dev->stats.rx_bytes += skb->len; | |
462 | } | |
463 | ||
464 | if (prev_dev) { | |
465 | skb->dev = prev_dev; | |
5548a8a1 | 466 | netif_receive_skb(skb); |
b2e7771e JB |
467 | } else |
468 | dev_kfree_skb(skb); | |
469 | ||
470 | return origskb; | |
471 | } | |
472 | ||
5cf121c3 | 473 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 474 | { |
238f74a2 | 475 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 476 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 477 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
478 | |
479 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
480 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
481 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 482 | /* frame has qos control */ |
238f74a2 | 483 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 484 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 485 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
486 | |
487 | seqno_idx = tid; | |
488 | security_idx = tid; | |
6e0d114d | 489 | } else { |
1411f9b5 JB |
490 | /* |
491 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
492 | * | |
493 | * Sequence numbers for management frames, QoS data | |
494 | * frames with a broadcast/multicast address in the | |
495 | * Address 1 field, and all non-QoS data frames sent | |
496 | * by QoS STAs are assigned using an additional single | |
497 | * modulo-4096 counter, [...] | |
498 | * | |
499 | * We also use that counter for non-QoS STAs. | |
500 | */ | |
5a306f58 | 501 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
502 | security_idx = 0; |
503 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 504 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 505 | tid = 0; |
6e0d114d | 506 | } |
52865dfd | 507 | |
9e26297a JB |
508 | rx->seqno_idx = seqno_idx; |
509 | rx->security_idx = security_idx; | |
6e0d114d JB |
510 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
511 | * For now, set skb->priority to 0 for other cases. */ | |
512 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 513 | } |
6e0d114d | 514 | |
d1c3a37c JB |
515 | /** |
516 | * DOC: Packet alignment | |
517 | * | |
518 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
519 | * to the stack. | |
520 | * | |
521 | * Additionally, should, if possible, align the payload data in a way that | |
522 | * guarantees that the contained IP header is aligned to a four-byte | |
523 | * boundary. In the case of regular frames, this simply means aligning the | |
524 | * payload to a four-byte boundary (because either the IP header is directly | |
525 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
526 | * in front of it). If the payload data is not properly aligned and the |
527 | * architecture doesn't support efficient unaligned operations, mac80211 | |
528 | * will align the data. | |
d1c3a37c JB |
529 | * |
530 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
531 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
532 | * push the IP header further back to a multiple of four again. Thankfully, the | |
533 | * specs were sane enough this time around to require padding each A-MSDU | |
534 | * subframe to a length that is a multiple of four. | |
535 | * | |
25985edc | 536 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
537 | * the payload is not supported, the driver is required to move the 802.11 |
538 | * header to be directly in front of the payload in that case. | |
539 | */ | |
540 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 541 | { |
59d9cb07 KV |
542 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
543 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
544 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 545 | #endif |
6e0d114d JB |
546 | } |
547 | ||
6368e4b1 | 548 | |
571ecf67 JB |
549 | /* rx handlers */ |
550 | ||
3cfcf6ac JM |
551 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
552 | { | |
553 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
554 | ||
555 | if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1)) | |
556 | return 0; | |
557 | ||
558 | return ieee80211_is_robust_mgmt_frame(hdr); | |
559 | } | |
560 | ||
561 | ||
562 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
563 | { | |
564 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
565 | ||
566 | if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1)) | |
567 | return 0; | |
568 | ||
569 | return ieee80211_is_robust_mgmt_frame(hdr); | |
570 | } | |
571 | ||
572 | ||
573 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
574 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
575 | { | |
576 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
577 | struct ieee80211_mmie *mmie; | |
578 | ||
1df332e8 | 579 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
580 | return -1; |
581 | ||
582 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr)) | |
583 | return -1; /* not a robust management frame */ | |
584 | ||
585 | mmie = (struct ieee80211_mmie *) | |
586 | (skb->data + skb->len - sizeof(*mmie)); | |
587 | if (mmie->element_id != WLAN_EID_MMIE || | |
588 | mmie->length != sizeof(*mmie) - 2) | |
589 | return -1; | |
590 | ||
591 | return le16_to_cpu(mmie->key_id); | |
592 | } | |
593 | ||
1df332e8 | 594 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 595 | { |
a7767f95 | 596 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 597 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 598 | |
a7767f95 | 599 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
600 | if (is_multicast_ether_addr(hdr->addr1)) { |
601 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 602 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 603 | return RX_DROP_MONITOR; |
b203ca39 | 604 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
605 | return RX_DROP_MONITOR; |
606 | } else { | |
607 | if (!ieee80211_has_a4(hdr->frame_control)) | |
608 | return RX_DROP_MONITOR; | |
b203ca39 | 609 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
610 | return RX_DROP_MONITOR; |
611 | } | |
33b64eb2 LCC |
612 | } |
613 | ||
614 | /* If there is not an established peer link and this is not a peer link | |
615 | * establisment frame, beacon or probe, drop the frame. | |
616 | */ | |
617 | ||
57cf8043 | 618 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 619 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 620 | |
a7767f95 | 621 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
622 | return RX_DROP_MONITOR; |
623 | ||
a7767f95 | 624 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 625 | u8 category; |
9b395bc3 JB |
626 | |
627 | /* make sure category field is present */ | |
628 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
629 | return RX_DROP_MONITOR; | |
630 | ||
33b64eb2 | 631 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
632 | category = mgmt->u.action.category; |
633 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 634 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 635 | return RX_DROP_MONITOR; |
33b64eb2 | 636 | return RX_CONTINUE; |
33b64eb2 LCC |
637 | } |
638 | ||
a7767f95 HH |
639 | if (ieee80211_is_probe_req(hdr->frame_control) || |
640 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
641 | ieee80211_is_beacon(hdr->frame_control) || |
642 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
643 | return RX_CONTINUE; |
644 | ||
645 | return RX_DROP_MONITOR; | |
a7767f95 HH |
646 | } |
647 | ||
902acc78 JB |
648 | return RX_CONTINUE; |
649 | } | |
33b64eb2 | 650 | |
d3b2fb53 | 651 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 652 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
653 | int index, |
654 | struct sk_buff_head *frames) | |
1edfb1af | 655 | { |
1edfb1af | 656 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 657 | struct ieee80211_rx_status *status; |
1edfb1af | 658 | |
dd318575 JB |
659 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
660 | ||
1edfb1af JB |
661 | if (!skb) |
662 | goto no_frame; | |
663 | ||
071d9ac2 | 664 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
665 | tid_agg_rx->stored_mpdu_num--; |
666 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
667 | status = IEEE80211_SKB_RXCB(skb); |
668 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
f9e124fb | 669 | __skb_queue_tail(frames, skb); |
1edfb1af JB |
670 | |
671 | no_frame: | |
9a886586 | 672 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
673 | } |
674 | ||
d3b2fb53 | 675 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 676 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
677 | u16 head_seq_num, |
678 | struct sk_buff_head *frames) | |
1edfb1af JB |
679 | { |
680 | int index; | |
681 | ||
dd318575 JB |
682 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
683 | ||
9a886586 JB |
684 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
685 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, | |
686 | tid_agg_rx->ssn) % | |
1edfb1af | 687 | tid_agg_rx->buf_size; |
f9e124fb CL |
688 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
689 | frames); | |
1edfb1af JB |
690 | } |
691 | } | |
692 | ||
693 | /* | |
694 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
695 | * the skb was added to the buffer longer than this time ago, the earlier | |
696 | * frames that have not yet been received are assumed to be lost and the skb | |
697 | * can be released for processing. This may also release other skb's from the | |
698 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
699 | * |
700 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
701 | */ |
702 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
703 | ||
d3b2fb53 | 704 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
705 | struct tid_ampdu_rx *tid_agg_rx, |
706 | struct sk_buff_head *frames) | |
aa0c8636 | 707 | { |
2bff8ebf | 708 | int index, j; |
aa0c8636 | 709 | |
dd318575 JB |
710 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
711 | ||
aa0c8636 | 712 | /* release the buffer until next missing frame */ |
9a886586 JB |
713 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
714 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
aa0c8636 | 715 | if (!tid_agg_rx->reorder_buf[index] && |
07ae2dfc | 716 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
717 | /* |
718 | * No buffers ready to be released, but check whether any | |
719 | * frames in the reorder buffer have timed out. | |
720 | */ | |
aa0c8636 CL |
721 | int skipped = 1; |
722 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
723 | j = (j + 1) % tid_agg_rx->buf_size) { | |
724 | if (!tid_agg_rx->reorder_buf[j]) { | |
725 | skipped++; | |
726 | continue; | |
727 | } | |
499fe9a4 DH |
728 | if (skipped && |
729 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 730 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 731 | goto set_release_timer; |
aa0c8636 | 732 | |
bdcbd8e0 JB |
733 | ht_dbg_ratelimited(sdata, |
734 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
735 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
736 | frames); | |
aa0c8636 CL |
737 | |
738 | /* | |
739 | * Increment the head seq# also for the skipped slots. | |
740 | */ | |
741 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
742 | (tid_agg_rx->head_seq_num + |
743 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
744 | skipped = 0; |
745 | } | |
746 | } else while (tid_agg_rx->reorder_buf[index]) { | |
f9e124fb CL |
747 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
748 | frames); | |
9a886586 JB |
749 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
750 | tid_agg_rx->ssn) % | |
aa0c8636 CL |
751 | tid_agg_rx->buf_size; |
752 | } | |
2bff8ebf CL |
753 | |
754 | if (tid_agg_rx->stored_mpdu_num) { | |
9a886586 JB |
755 | j = index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
756 | tid_agg_rx->ssn) % | |
757 | tid_agg_rx->buf_size; | |
2bff8ebf CL |
758 | |
759 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
760 | j = (j + 1) % tid_agg_rx->buf_size) { | |
761 | if (tid_agg_rx->reorder_buf[j]) | |
762 | break; | |
763 | } | |
764 | ||
765 | set_release_timer: | |
766 | ||
767 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 768 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
769 | HT_RX_REORDER_BUF_TIMEOUT); |
770 | } else { | |
771 | del_timer(&tid_agg_rx->reorder_timer); | |
772 | } | |
aa0c8636 CL |
773 | } |
774 | ||
1edfb1af JB |
775 | /* |
776 | * As this function belongs to the RX path it must be under | |
777 | * rcu_read_lock protection. It returns false if the frame | |
778 | * can be processed immediately, true if it was consumed. | |
779 | */ | |
d3b2fb53 | 780 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 781 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
782 | struct sk_buff *skb, |
783 | struct sk_buff_head *frames) | |
1edfb1af JB |
784 | { |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
786 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
787 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
788 | u16 head_seq_num, buf_size; | |
789 | int index; | |
2bff8ebf | 790 | bool ret = true; |
1edfb1af | 791 | |
dd318575 JB |
792 | spin_lock(&tid_agg_rx->reorder_lock); |
793 | ||
1edfb1af JB |
794 | buf_size = tid_agg_rx->buf_size; |
795 | head_seq_num = tid_agg_rx->head_seq_num; | |
796 | ||
797 | /* frame with out of date sequence number */ | |
9a886586 | 798 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 799 | dev_kfree_skb(skb); |
2bff8ebf | 800 | goto out; |
1edfb1af JB |
801 | } |
802 | ||
803 | /* | |
804 | * If frame the sequence number exceeds our buffering window | |
805 | * size release some previous frames to make room for this one. | |
806 | */ | |
9a886586 JB |
807 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
808 | head_seq_num = ieee80211_sn_inc( | |
809 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 810 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 811 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 812 | head_seq_num, frames); |
1edfb1af JB |
813 | } |
814 | ||
815 | /* Now the new frame is always in the range of the reordering buffer */ | |
816 | ||
9a886586 JB |
817 | index = ieee80211_sn_sub(mpdu_seq_num, |
818 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
1edfb1af JB |
819 | |
820 | /* check if we already stored this frame */ | |
821 | if (tid_agg_rx->reorder_buf[index]) { | |
822 | dev_kfree_skb(skb); | |
2bff8ebf | 823 | goto out; |
1edfb1af JB |
824 | } |
825 | ||
826 | /* | |
827 | * If the current MPDU is in the right order and nothing else | |
828 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
829 | * If it is first but there's something stored, we may be able |
830 | * to release frames after this one. | |
1edfb1af JB |
831 | */ |
832 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
833 | tid_agg_rx->stored_mpdu_num == 0) { | |
9a886586 JB |
834 | tid_agg_rx->head_seq_num = |
835 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
836 | ret = false; |
837 | goto out; | |
1edfb1af JB |
838 | } |
839 | ||
840 | /* put the frame in the reordering buffer */ | |
841 | tid_agg_rx->reorder_buf[index] = skb; | |
842 | tid_agg_rx->reorder_time[index] = jiffies; | |
843 | tid_agg_rx->stored_mpdu_num++; | |
f9e124fb | 844 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
1edfb1af | 845 | |
2bff8ebf CL |
846 | out: |
847 | spin_unlock(&tid_agg_rx->reorder_lock); | |
848 | return ret; | |
1edfb1af JB |
849 | } |
850 | ||
851 | /* | |
852 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
853 | * true if the MPDU was buffered, false if it should be processed. | |
854 | */ | |
f9e124fb CL |
855 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
856 | struct sk_buff_head *frames) | |
1edfb1af | 857 | { |
2569a826 JB |
858 | struct sk_buff *skb = rx->skb; |
859 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 860 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 861 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 862 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
863 | struct tid_ampdu_rx *tid_agg_rx; |
864 | u16 sc; | |
6cc00d54 | 865 | u8 tid, ack_policy; |
1edfb1af JB |
866 | |
867 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
2569a826 | 868 | goto dont_reorder; |
1edfb1af JB |
869 | |
870 | /* | |
871 | * filter the QoS data rx stream according to | |
872 | * STA/TID and check if this STA/TID is on aggregation | |
873 | */ | |
874 | ||
1edfb1af | 875 | if (!sta) |
2569a826 | 876 | goto dont_reorder; |
1edfb1af | 877 | |
6cc00d54 TP |
878 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
879 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
880 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
881 | ||
a87f736d JB |
882 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
883 | if (!tid_agg_rx) | |
884 | goto dont_reorder; | |
1edfb1af JB |
885 | |
886 | /* qos null data frames are excluded */ | |
887 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 888 | goto dont_reorder; |
1edfb1af | 889 | |
6cc00d54 TP |
890 | /* not part of a BA session */ |
891 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
892 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
893 | goto dont_reorder; | |
894 | ||
660c6a44 TP |
895 | /* not actually part of this BA session */ |
896 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
897 | goto dont_reorder; | |
898 | ||
1edfb1af JB |
899 | /* new, potentially un-ordered, ampdu frame - process it */ |
900 | ||
901 | /* reset session timer */ | |
902 | if (tid_agg_rx->timeout) | |
12d3952f | 903 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
904 | |
905 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
906 | sc = le16_to_cpu(hdr->seq_ctrl); | |
907 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 908 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
909 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
910 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 911 | return; |
1edfb1af JB |
912 | } |
913 | ||
a87f736d JB |
914 | /* |
915 | * No locking needed -- we will only ever process one | |
916 | * RX packet at a time, and thus own tid_agg_rx. All | |
917 | * other code manipulating it needs to (and does) make | |
918 | * sure that we cannot get to it any more before doing | |
919 | * anything with it. | |
920 | */ | |
f9e124fb CL |
921 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
922 | frames)) | |
2569a826 JB |
923 | return; |
924 | ||
925 | dont_reorder: | |
f9e124fb | 926 | __skb_queue_tail(frames, skb); |
1edfb1af | 927 | } |
33b64eb2 | 928 | |
49461622 | 929 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 930 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 931 | { |
a7767f95 | 932 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 933 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 JB |
934 | |
935 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
936 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 937 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 938 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 939 | hdr->seq_ctrl)) { |
554891e6 | 940 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
941 | rx->local->dot11FrameDuplicateCount++; |
942 | rx->sta->num_duplicates++; | |
943 | } | |
b1f93314 | 944 | return RX_DROP_UNUSABLE; |
571ecf67 | 945 | } else |
9e26297a | 946 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
571ecf67 JB |
947 | } |
948 | ||
571ecf67 JB |
949 | if (unlikely(rx->skb->len < 16)) { |
950 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 951 | return RX_DROP_MONITOR; |
571ecf67 JB |
952 | } |
953 | ||
571ecf67 JB |
954 | /* Drop disallowed frame classes based on STA auth/assoc state; |
955 | * IEEE 802.11, Chap 5.5. | |
956 | * | |
ccd7b362 JB |
957 | * mac80211 filters only based on association state, i.e. it drops |
958 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
959 | * deauth/disassoc frames when needed. In addition, hostapd is |
960 | * responsible for filtering on both auth and assoc states. | |
961 | */ | |
33b64eb2 | 962 | |
902acc78 | 963 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 964 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 965 | |
a7767f95 HH |
966 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
967 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 968 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 969 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 970 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
971 | /* |
972 | * accept port control frames from the AP even when it's not | |
973 | * yet marked ASSOC to prevent a race where we don't set the | |
974 | * assoc bit quickly enough before it sends the first frame | |
975 | */ | |
976 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 977 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
978 | unsigned int hdrlen; |
979 | __be16 ethertype; | |
980 | ||
981 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
982 | ||
983 | if (rx->skb->len < hdrlen + 8) | |
984 | return RX_DROP_MONITOR; | |
985 | ||
986 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
987 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
988 | return RX_CONTINUE; |
989 | } | |
21fc7560 JB |
990 | |
991 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
992 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
993 | hdr->addr2, | |
994 | GFP_ATOMIC)) | |
995 | return RX_DROP_UNUSABLE; | |
996 | ||
e4c26add | 997 | return RX_DROP_MONITOR; |
2a33bee2 | 998 | } |
571ecf67 | 999 | |
9ae54c84 | 1000 | return RX_CONTINUE; |
570bd537 JB |
1001 | } |
1002 | ||
1003 | ||
49461622 | 1004 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1005 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
570bd537 | 1006 | { |
eb9fb5b8 JB |
1007 | struct sk_buff *skb = rx->skb; |
1008 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1009 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
3017b80b JB |
1010 | int keyidx; |
1011 | int hdrlen; | |
e4c26add | 1012 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
e31b8213 | 1013 | struct ieee80211_key *sta_ptk = NULL; |
3cfcf6ac | 1014 | int mmie_keyidx = -1; |
761ab470 | 1015 | __le16 fc; |
570bd537 | 1016 | |
3017b80b JB |
1017 | /* |
1018 | * Key selection 101 | |
1019 | * | |
3cfcf6ac | 1020 | * There are four types of keys: |
3017b80b | 1021 | * - GTK (group keys) |
3cfcf6ac | 1022 | * - IGTK (group keys for management frames) |
3017b80b JB |
1023 | * - PTK (pairwise keys) |
1024 | * - STK (station-to-station pairwise keys) | |
1025 | * | |
1026 | * When selecting a key, we have to distinguish between multicast | |
1027 | * (including broadcast) and unicast frames, the latter can only | |
3cfcf6ac JM |
1028 | * use PTKs and STKs while the former always use GTKs and IGTKs. |
1029 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1030 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1031 | * don't have a PTK/STK we check the key index for a WEP key. | |
3017b80b | 1032 | * |
8dc06a1c JB |
1033 | * Note that in a regular BSS, multicast frames are sent by the |
1034 | * AP only, associated stations unicast the frame to the AP first | |
1035 | * which then multicasts it on their behalf. | |
1036 | * | |
3017b80b JB |
1037 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
1038 | * with each station, that is something we don't currently handle. | |
8dc06a1c JB |
1039 | * The spec seems to expect that one negotiates the same key with |
1040 | * every station but there's no such requirement; VLANs could be | |
1041 | * possible. | |
3017b80b JB |
1042 | */ |
1043 | ||
3017b80b | 1044 | /* |
1990af8d | 1045 | * No point in finding a key and decrypting if the frame is neither |
3017b80b JB |
1046 | * addressed to us nor a multicast frame. |
1047 | */ | |
554891e6 | 1048 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1049 | return RX_CONTINUE; |
3017b80b | 1050 | |
2569a826 JB |
1051 | /* start without a key */ |
1052 | rx->key = NULL; | |
1053 | ||
d4e46a3d | 1054 | if (rx->sta) |
e31b8213 | 1055 | sta_ptk = rcu_dereference(rx->sta->ptk); |
d4e46a3d | 1056 | |
761ab470 JB |
1057 | fc = hdr->frame_control; |
1058 | ||
1059 | if (!ieee80211_has_protected(fc)) | |
0c7c10c7 JM |
1060 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); |
1061 | ||
e31b8213 JB |
1062 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { |
1063 | rx->key = sta_ptk; | |
dc1580dd JB |
1064 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1065 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1066 | return RX_CONTINUE; | |
0c7c10c7 | 1067 | /* Skip decryption if the frame is not protected. */ |
761ab470 | 1068 | if (!ieee80211_has_protected(fc)) |
0c7c10c7 | 1069 | return RX_CONTINUE; |
3cfcf6ac JM |
1070 | } else if (mmie_keyidx >= 0) { |
1071 | /* Broadcast/multicast robust management frame / BIP */ | |
eb9fb5b8 JB |
1072 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1073 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
3cfcf6ac JM |
1074 | return RX_CONTINUE; |
1075 | ||
1076 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1077 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1078 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
e31b8213 JB |
1079 | if (rx->sta) |
1080 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1081 | if (!rx->key) | |
1082 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
761ab470 | 1083 | } else if (!ieee80211_has_protected(fc)) { |
0c7c10c7 JM |
1084 | /* |
1085 | * The frame was not protected, so skip decryption. However, we | |
1086 | * need to set rx->key if there is a key that could have been | |
1087 | * used so that the frame may be dropped if encryption would | |
1088 | * have been expected. | |
1089 | */ | |
1090 | struct ieee80211_key *key = NULL; | |
897bed8b JB |
1091 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1092 | int i; | |
1093 | ||
761ab470 | 1094 | if (ieee80211_is_mgmt(fc) && |
0c7c10c7 JM |
1095 | is_multicast_ether_addr(hdr->addr1) && |
1096 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1097 | rx->key = key; | |
897bed8b JB |
1098 | else { |
1099 | if (rx->sta) { | |
1100 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1101 | key = rcu_dereference(rx->sta->gtk[i]); | |
1102 | if (key) | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | if (!key) { | |
1107 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1108 | key = rcu_dereference(sdata->keys[i]); | |
1109 | if (key) | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | if (key) | |
1114 | rx->key = key; | |
1115 | } | |
0c7c10c7 | 1116 | return RX_CONTINUE; |
571ecf67 | 1117 | } else { |
39184b15 | 1118 | u8 keyid; |
3017b80b JB |
1119 | /* |
1120 | * The device doesn't give us the IV so we won't be | |
1121 | * able to look up the key. That's ok though, we | |
1122 | * don't need to decrypt the frame, we just won't | |
1123 | * be able to keep statistics accurate. | |
1124 | * Except for key threshold notifications, should | |
1125 | * we somehow allow the driver to tell us which key | |
1126 | * the hardware used if this flag is set? | |
1127 | */ | |
eb9fb5b8 JB |
1128 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1129 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
9ae54c84 | 1130 | return RX_CONTINUE; |
3017b80b | 1131 | |
761ab470 | 1132 | hdrlen = ieee80211_hdrlen(fc); |
3017b80b JB |
1133 | |
1134 | if (rx->skb->len < 8 + hdrlen) | |
e4c26add | 1135 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
3017b80b JB |
1136 | |
1137 | /* | |
1138 | * no need to call ieee80211_wep_get_keyidx, | |
1139 | * it verifies a bunch of things we've done already | |
1140 | */ | |
39184b15 ZY |
1141 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); |
1142 | keyidx = keyid >> 6; | |
3017b80b | 1143 | |
e31b8213 JB |
1144 | /* check per-station GTK first, if multicast packet */ |
1145 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1146 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
3017b80b | 1147 | |
e31b8213 JB |
1148 | /* if not found, try default key */ |
1149 | if (!rx->key) { | |
1150 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1151 | ||
1152 | /* | |
1153 | * RSNA-protected unicast frames should always be | |
1154 | * sent with pairwise or station-to-station keys, | |
1155 | * but for WEP we allow using a key index as well. | |
1156 | */ | |
1157 | if (rx->key && | |
1158 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1159 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1160 | !is_multicast_ether_addr(hdr->addr1)) | |
1161 | rx->key = NULL; | |
1162 | } | |
571ecf67 JB |
1163 | } |
1164 | ||
3017b80b | 1165 | if (rx->key) { |
95acac61 JB |
1166 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) |
1167 | return RX_DROP_MONITOR; | |
1168 | ||
571ecf67 | 1169 | rx->key->tx_rx_count++; |
011bfcc4 | 1170 | /* TODO: add threshold stuff again */ |
1990af8d | 1171 | } else { |
e4c26add | 1172 | return RX_DROP_MONITOR; |
70f08765 JB |
1173 | } |
1174 | ||
97359d12 JB |
1175 | switch (rx->key->conf.cipher) { |
1176 | case WLAN_CIPHER_SUITE_WEP40: | |
1177 | case WLAN_CIPHER_SUITE_WEP104: | |
e2f036da MN |
1178 | result = ieee80211_crypto_wep_decrypt(rx); |
1179 | break; | |
97359d12 | 1180 | case WLAN_CIPHER_SUITE_TKIP: |
e2f036da MN |
1181 | result = ieee80211_crypto_tkip_decrypt(rx); |
1182 | break; | |
97359d12 | 1183 | case WLAN_CIPHER_SUITE_CCMP: |
e2f036da MN |
1184 | result = ieee80211_crypto_ccmp_decrypt(rx); |
1185 | break; | |
97359d12 | 1186 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
1187 | result = ieee80211_crypto_aes_cmac_decrypt(rx); |
1188 | break; | |
3ffc2a90 JB |
1189 | default: |
1190 | /* | |
1191 | * We can reach here only with HW-only algorithms | |
1192 | * but why didn't it decrypt the frame?! | |
1193 | */ | |
1194 | return RX_DROP_UNUSABLE; | |
70f08765 JB |
1195 | } |
1196 | ||
a8286911 JB |
1197 | /* the hdr variable is invalid after the decrypt handlers */ |
1198 | ||
e2f036da | 1199 | /* either the frame has been decrypted or will be dropped */ |
eb9fb5b8 | 1200 | status->flag |= RX_FLAG_DECRYPTED; |
e2f036da MN |
1201 | |
1202 | return result; | |
70f08765 JB |
1203 | } |
1204 | ||
572e0012 KV |
1205 | static ieee80211_rx_result debug_noinline |
1206 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1207 | { | |
1208 | struct ieee80211_local *local; | |
1209 | struct ieee80211_hdr *hdr; | |
1210 | struct sk_buff *skb; | |
1211 | ||
1212 | local = rx->local; | |
1213 | skb = rx->skb; | |
1214 | hdr = (struct ieee80211_hdr *) skb->data; | |
1215 | ||
1216 | if (!local->pspolling) | |
1217 | return RX_CONTINUE; | |
1218 | ||
1219 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1220 | /* this is not from AP */ | |
1221 | return RX_CONTINUE; | |
1222 | ||
1223 | if (!ieee80211_is_data(hdr->frame_control)) | |
1224 | return RX_CONTINUE; | |
1225 | ||
1226 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1227 | /* AP has no more frames buffered for us */ | |
1228 | local->pspolling = false; | |
1229 | return RX_CONTINUE; | |
1230 | } | |
1231 | ||
1232 | /* more data bit is set, let's request a new frame from the AP */ | |
1233 | ieee80211_send_pspoll(local, rx->sdata); | |
1234 | ||
1235 | return RX_CONTINUE; | |
1236 | } | |
1237 | ||
d012a605 | 1238 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1239 | { |
133b8226 | 1240 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1241 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1242 | struct ps_data *ps; |
0795af57 | 1243 | |
d012a605 MP |
1244 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1245 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1246 | ps = &sdata->bss->ps; | |
1247 | else | |
1248 | return; | |
1249 | ||
1250 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1251 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1252 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1253 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1254 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1255 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1256 | } |
1257 | ||
d012a605 | 1258 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1259 | { |
bdcbd8e0 JB |
1260 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1261 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1262 | |
c2c98fde | 1263 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
bdcbd8e0 JB |
1264 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1265 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1266 | return; |
1267 | } | |
1268 | ||
1269 | ieee80211_sta_ps_deliver_wakeup(sta); | |
571ecf67 JB |
1270 | } |
1271 | ||
d057e5a3 AN |
1272 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1273 | { | |
1274 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1275 | bool in_ps; | |
1276 | ||
1277 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1278 | ||
1279 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1280 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1281 | if ((start && in_ps) || (!start && !in_ps)) |
1282 | return -EINVAL; | |
1283 | ||
1284 | if (start) | |
d012a605 | 1285 | sta_ps_start(sta_inf); |
d057e5a3 | 1286 | else |
d012a605 | 1287 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1288 | |
1289 | return 0; | |
1290 | } | |
1291 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1292 | ||
47086fc5 JB |
1293 | static ieee80211_rx_result debug_noinline |
1294 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1295 | { | |
1296 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1297 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1298 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1299 | int tid, ac; | |
1300 | ||
1301 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1302 | return RX_CONTINUE; | |
1303 | ||
1304 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1305 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1306 | return RX_CONTINUE; | |
1307 | ||
1308 | /* | |
1309 | * The device handles station powersave, so don't do anything about | |
1310 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1311 | * it to mac80211 since they're handled.) | |
1312 | */ | |
1313 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1314 | return RX_CONTINUE; | |
1315 | ||
1316 | /* | |
1317 | * Don't do anything if the station isn't already asleep. In | |
1318 | * the uAPSD case, the station will probably be marked asleep, | |
1319 | * in the PS-Poll case the station must be confused ... | |
1320 | */ | |
c2c98fde | 1321 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1322 | return RX_CONTINUE; |
1323 | ||
1324 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1325 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1326 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1327 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1328 | else | |
c2c98fde | 1329 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1330 | } |
47086fc5 JB |
1331 | |
1332 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1333 | * count as an dropped frame. */ | |
1334 | dev_kfree_skb(rx->skb); | |
1335 | ||
1336 | return RX_QUEUED; | |
1337 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1338 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1339 | ieee80211_has_pm(hdr->frame_control) && | |
1340 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1341 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1342 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1343 | ac = ieee802_1d_to_ac[tid & 7]; | |
1344 | ||
1345 | /* | |
1346 | * If this AC is not trigger-enabled do nothing. | |
1347 | * | |
1348 | * NB: This could/should check a separate bitmap of trigger- | |
1349 | * enabled queues, but for now we only implement uAPSD w/o | |
1350 | * TSPEC changes to the ACs, so they're always the same. | |
1351 | */ | |
1352 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1353 | return RX_CONTINUE; | |
1354 | ||
1355 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1356 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1357 | return RX_CONTINUE; |
1358 | ||
c2c98fde | 1359 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1360 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1361 | else | |
c2c98fde | 1362 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1363 | } |
1364 | ||
1365 | return RX_CONTINUE; | |
1366 | } | |
1367 | ||
49461622 | 1368 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1369 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1370 | { |
1371 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1372 | struct sk_buff *skb = rx->skb; |
1373 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1374 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1375 | int i; |
571ecf67 JB |
1376 | |
1377 | if (!sta) | |
9ae54c84 | 1378 | return RX_CONTINUE; |
571ecf67 | 1379 | |
b291ba11 JB |
1380 | /* |
1381 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1382 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1383 | * current IBSS network alive in cases where other STAs start | |
1384 | * using different BSSID. This will also give the station another | |
1385 | * chance to restart the authentication/authorization in case | |
1386 | * something went wrong the first time. | |
b291ba11 | 1387 | */ |
05c914fe | 1388 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1389 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1390 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1391 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1392 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1393 | sta->last_rx = jiffies; |
3af6334c FF |
1394 | if (ieee80211_is_data(hdr->frame_control)) { |
1395 | sta->last_rx_rate_idx = status->rate_idx; | |
1396 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1397 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1398 | } |
1399 | } | |
b291ba11 JB |
1400 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1401 | /* | |
33b64eb2 LCC |
1402 | * Mesh beacons will update last_rx when if they are found to |
1403 | * match the current local configuration when processed. | |
571ecf67 | 1404 | */ |
b291ba11 | 1405 | sta->last_rx = jiffies; |
3af6334c FF |
1406 | if (ieee80211_is_data(hdr->frame_control)) { |
1407 | sta->last_rx_rate_idx = status->rate_idx; | |
1408 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1409 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1410 | } |
571ecf67 JB |
1411 | } |
1412 | ||
554891e6 | 1413 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1414 | return RX_CONTINUE; |
571ecf67 | 1415 | |
3cf335d5 KV |
1416 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1417 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1418 | ||
571ecf67 JB |
1419 | sta->rx_fragments++; |
1420 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1421 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1422 | sta->last_signal = status->signal; | |
1423 | ewma_add(&sta->avg_signal, -status->signal); | |
1424 | } | |
571ecf67 | 1425 | |
ef0621e8 FF |
1426 | if (status->chains) { |
1427 | sta->chains = status->chains; | |
1428 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1429 | int signal = status->chain_signal[i]; | |
1430 | ||
1431 | if (!(status->chains & BIT(i))) | |
1432 | continue; | |
1433 | ||
1434 | sta->chain_signal_last[i] = signal; | |
1435 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1436 | } | |
1437 | } | |
1438 | ||
72eaa43a JB |
1439 | /* |
1440 | * Change STA power saving mode only at the end of a frame | |
1441 | * exchange sequence. | |
1442 | */ | |
d057e5a3 AN |
1443 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1444 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1445 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe JB |
1446 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
1447 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { | |
c2c98fde | 1448 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
72eaa43a JB |
1449 | /* |
1450 | * Ignore doze->wake transitions that are | |
1451 | * indicated by non-data frames, the standard | |
1452 | * is unclear here, but for example going to | |
1453 | * PS mode and then scanning would cause a | |
1454 | * doze->wake transition for the probe request, | |
1455 | * and that is clearly undesirable. | |
1456 | */ | |
1457 | if (ieee80211_is_data(hdr->frame_control) && | |
1458 | !ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1459 | sta_ps_end(sta); |
72eaa43a JB |
1460 | } else { |
1461 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1462 | sta_ps_start(sta); |
72eaa43a | 1463 | } |
571ecf67 JB |
1464 | } |
1465 | ||
3f52b7e3 MP |
1466 | /* mesh power save support */ |
1467 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1468 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1469 | ||
22403def JB |
1470 | /* |
1471 | * Drop (qos-)data::nullfunc frames silently, since they | |
1472 | * are used only to control station power saving mode. | |
1473 | */ | |
1474 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1475 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1476 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1477 | |
1478 | /* | |
1479 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1480 | * that was not moved to a 4-addr STA vlan yet send |
1481 | * the event to userspace and for older hostapd drop | |
1482 | * the frame to the monitor interface. | |
d524215f FF |
1483 | */ |
1484 | if (ieee80211_has_a4(hdr->frame_control) && | |
1485 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1486 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1487 | !rx->sdata->u.vlan.sta))) { |
1488 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1489 | cfg80211_rx_unexpected_4addr_frame( | |
1490 | rx->sdata->dev, sta->sta.addr, | |
1491 | GFP_ATOMIC); | |
d524215f | 1492 | return RX_DROP_MONITOR; |
e7f4a940 | 1493 | } |
22403def JB |
1494 | /* |
1495 | * Update counter and free packet here to avoid | |
1496 | * counting this as a dropped packed. | |
1497 | */ | |
571ecf67 JB |
1498 | sta->rx_packets++; |
1499 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1500 | return RX_QUEUED; |
571ecf67 JB |
1501 | } |
1502 | ||
9ae54c84 | 1503 | return RX_CONTINUE; |
571ecf67 JB |
1504 | } /* ieee80211_rx_h_sta_process */ |
1505 | ||
571ecf67 JB |
1506 | static inline struct ieee80211_fragment_entry * |
1507 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1508 | unsigned int frag, unsigned int seq, int rx_queue, | |
1509 | struct sk_buff **skb) | |
1510 | { | |
1511 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1512 | |
571ecf67 JB |
1513 | entry = &sdata->fragments[sdata->fragment_next++]; |
1514 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1515 | sdata->fragment_next = 0; | |
1516 | ||
bdcbd8e0 | 1517 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1518 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1519 | |
1520 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1521 | *skb = NULL; | |
1522 | entry->first_frag_time = jiffies; | |
1523 | entry->seq = seq; | |
1524 | entry->rx_queue = rx_queue; | |
1525 | entry->last_frag = frag; | |
1526 | entry->ccmp = 0; | |
1527 | entry->extra_len = 0; | |
1528 | ||
1529 | return entry; | |
1530 | } | |
1531 | ||
1532 | static inline struct ieee80211_fragment_entry * | |
1533 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1534 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1535 | int rx_queue, struct ieee80211_hdr *hdr) |
1536 | { | |
1537 | struct ieee80211_fragment_entry *entry; | |
1538 | int i, idx; | |
1539 | ||
1540 | idx = sdata->fragment_next; | |
1541 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1542 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1543 | |
1544 | idx--; | |
1545 | if (idx < 0) | |
1546 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1547 | ||
1548 | entry = &sdata->fragments[idx]; | |
1549 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1550 | entry->rx_queue != rx_queue || | |
1551 | entry->last_frag + 1 != frag) | |
1552 | continue; | |
1553 | ||
b73d70ad | 1554 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1555 | |
b73d70ad HH |
1556 | /* |
1557 | * Check ftype and addresses are equal, else check next fragment | |
1558 | */ | |
1559 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1560 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1561 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1562 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1563 | continue; |
1564 | ||
ab46623e | 1565 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1566 | __skb_queue_purge(&entry->skb_list); |
1567 | continue; | |
1568 | } | |
1569 | return entry; | |
1570 | } | |
1571 | ||
1572 | return NULL; | |
1573 | } | |
1574 | ||
49461622 | 1575 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1576 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1577 | { |
1578 | struct ieee80211_hdr *hdr; | |
1579 | u16 sc; | |
358c8d9d | 1580 | __le16 fc; |
571ecf67 JB |
1581 | unsigned int frag, seq; |
1582 | struct ieee80211_fragment_entry *entry; | |
1583 | struct sk_buff *skb; | |
554891e6 | 1584 | struct ieee80211_rx_status *status; |
571ecf67 | 1585 | |
b73d70ad | 1586 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1587 | fc = hdr->frame_control; |
f7fbf70e JC |
1588 | |
1589 | if (ieee80211_is_ctl(fc)) | |
1590 | return RX_CONTINUE; | |
1591 | ||
571ecf67 JB |
1592 | sc = le16_to_cpu(hdr->seq_ctrl); |
1593 | frag = sc & IEEE80211_SCTL_FRAG; | |
1594 | ||
358c8d9d | 1595 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1596 | is_multicast_ether_addr(hdr->addr1))) { |
1597 | /* not fragmented */ | |
1598 | goto out; | |
1599 | } | |
1600 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1601 | ||
e3cf8b3f ZY |
1602 | if (skb_linearize(rx->skb)) |
1603 | return RX_DROP_UNUSABLE; | |
1604 | ||
058897a4 AK |
1605 | /* |
1606 | * skb_linearize() might change the skb->data and | |
1607 | * previously cached variables (in this case, hdr) need to | |
1608 | * be refreshed with the new data. | |
1609 | */ | |
1610 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1611 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1612 | ||
1613 | if (frag == 0) { | |
1614 | /* This is the first fragment of a new frame. */ | |
1615 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1616 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1617 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1618 | ieee80211_has_protected(fc)) { |
9e26297a | 1619 | int queue = rx->security_idx; |
571ecf67 JB |
1620 | /* Store CCMP PN so that we can verify that the next |
1621 | * fragment has a sequential PN value. */ | |
1622 | entry->ccmp = 1; | |
1623 | memcpy(entry->last_pn, | |
9190252c | 1624 | rx->key->u.ccmp.rx_pn[queue], |
571ecf67 JB |
1625 | CCMP_PN_LEN); |
1626 | } | |
9ae54c84 | 1627 | return RX_QUEUED; |
571ecf67 JB |
1628 | } |
1629 | ||
1630 | /* This is a fragment for a frame that should already be pending in | |
1631 | * fragment cache. Add this fragment to the end of the pending entry. | |
1632 | */ | |
9e26297a JB |
1633 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1634 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1635 | if (!entry) { |
1636 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1637 | return RX_DROP_MONITOR; |
571ecf67 JB |
1638 | } |
1639 | ||
1640 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1641 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1642 | if (entry->ccmp) { | |
1643 | int i; | |
1644 | u8 pn[CCMP_PN_LEN], *rpn; | |
9190252c | 1645 | int queue; |
97359d12 | 1646 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1647 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1648 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); |
1649 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
1650 | pn[i]++; | |
1651 | if (pn[i]) | |
1652 | break; | |
1653 | } | |
9e26297a | 1654 | queue = rx->security_idx; |
9190252c | 1655 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
f4ea83dd | 1656 | if (memcmp(pn, rpn, CCMP_PN_LEN)) |
e4c26add | 1657 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1658 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); |
1659 | } | |
1660 | ||
358c8d9d | 1661 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1662 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1663 | entry->last_frag = frag; | |
1664 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1665 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1666 | rx->skb = NULL; |
9ae54c84 | 1667 | return RX_QUEUED; |
571ecf67 JB |
1668 | } |
1669 | ||
1670 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1671 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1672 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1673 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1674 | GFP_ATOMIC))) { | |
1675 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1676 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1677 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1678 | } |
1679 | } | |
1680 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1681 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1682 | dev_kfree_skb(skb); | |
1683 | } | |
1684 | ||
1685 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1686 | status = IEEE80211_SKB_RXCB(rx->skb); |
1687 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1688 | |
1689 | out: | |
1690 | if (rx->sta) | |
1691 | rx->sta->rx_packets++; | |
1692 | if (is_multicast_ether_addr(hdr->addr1)) | |
1693 | rx->local->dot11MulticastReceivedFrameCount++; | |
1694 | else | |
1695 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1696 | return RX_CONTINUE; |
571ecf67 JB |
1697 | } |
1698 | ||
1df332e8 | 1699 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1700 | { |
1df332e8 | 1701 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1702 | return -EACCES; |
571ecf67 | 1703 | |
76ee65bf | 1704 | return 0; |
571ecf67 JB |
1705 | } |
1706 | ||
1df332e8 | 1707 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1708 | { |
eb9fb5b8 JB |
1709 | struct sk_buff *skb = rx->skb; |
1710 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1711 | ||
3017b80b | 1712 | /* |
7848ba7d JB |
1713 | * Pass through unencrypted frames if the hardware has |
1714 | * decrypted them already. | |
3017b80b | 1715 | */ |
eb9fb5b8 | 1716 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1717 | return 0; |
571ecf67 JB |
1718 | |
1719 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1720 | if (unlikely(!ieee80211_has_protected(fc) && |
1721 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1722 | ieee80211_is_data(fc) && |
b3fc9c6c | 1723 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1724 | return -EACCES; |
bef5d1c7 JB |
1725 | |
1726 | return 0; | |
1727 | } | |
1728 | ||
1df332e8 | 1729 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1730 | { |
1731 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1732 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1733 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1734 | |
e3efca0a JM |
1735 | /* |
1736 | * Pass through unencrypted frames if the hardware has | |
1737 | * decrypted them already. | |
1738 | */ | |
1739 | if (status->flag & RX_FLAG_DECRYPTED) | |
1740 | return 0; | |
bef5d1c7 | 1741 | |
c2c98fde | 1742 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1743 | if (unlikely(!ieee80211_has_protected(fc) && |
1744 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e JM |
1745 | rx->key)) { |
1746 | if (ieee80211_is_deauth(fc)) | |
1747 | cfg80211_send_unprot_deauth(rx->sdata->dev, | |
1748 | rx->skb->data, | |
1749 | rx->skb->len); | |
1750 | else if (ieee80211_is_disassoc(fc)) | |
1751 | cfg80211_send_unprot_disassoc(rx->sdata->dev, | |
1752 | rx->skb->data, | |
1753 | rx->skb->len); | |
f2ca3ea4 | 1754 | return -EACCES; |
cf4e594e | 1755 | } |
f2ca3ea4 | 1756 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1757 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e JM |
1758 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
1759 | if (ieee80211_is_deauth(fc)) | |
1760 | cfg80211_send_unprot_deauth(rx->sdata->dev, | |
1761 | rx->skb->data, | |
1762 | rx->skb->len); | |
1763 | else if (ieee80211_is_disassoc(fc)) | |
1764 | cfg80211_send_unprot_disassoc(rx->sdata->dev, | |
1765 | rx->skb->data, | |
1766 | rx->skb->len); | |
f2ca3ea4 | 1767 | return -EACCES; |
cf4e594e | 1768 | } |
f2ca3ea4 JM |
1769 | /* |
1770 | * When using MFP, Action frames are not allowed prior to | |
1771 | * having configured keys. | |
1772 | */ | |
1773 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
1774 | ieee80211_is_robust_mgmt_frame( | |
1775 | (struct ieee80211_hdr *) rx->skb->data))) | |
1776 | return -EACCES; | |
1777 | } | |
b3fc9c6c | 1778 | |
76ee65bf | 1779 | return 0; |
571ecf67 JB |
1780 | } |
1781 | ||
76ee65bf | 1782 | static int |
4114fa21 | 1783 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1784 | { |
eb9fb5b8 | 1785 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1786 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1787 | bool check_port_control = false; |
1788 | struct ethhdr *ehdr; | |
1789 | int ret; | |
f14543ee | 1790 | |
4114fa21 | 1791 | *port_control = false; |
9bc383de JB |
1792 | if (ieee80211_has_a4(hdr->frame_control) && |
1793 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1794 | return -1; |
9bc383de | 1795 | |
fbb327c5 FF |
1796 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1797 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1798 | ||
1799 | if (!sdata->u.mgd.use_4addr) | |
1800 | return -1; | |
1801 | else | |
1802 | check_port_control = true; | |
1803 | } | |
1804 | ||
9bc383de | 1805 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1806 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1807 | return -1; |
571ecf67 | 1808 | |
fbb327c5 | 1809 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1810 | if (ret < 0) |
fbb327c5 FF |
1811 | return ret; |
1812 | ||
1813 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1814 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1815 | *port_control = true; | |
1816 | else if (check_port_control) | |
fbb327c5 FF |
1817 | return -1; |
1818 | ||
1819 | return 0; | |
76ee65bf | 1820 | } |
571ecf67 | 1821 | |
ce3edf6d JB |
1822 | /* |
1823 | * requires that rx->skb is a frame with ethernet header | |
1824 | */ | |
358c8d9d | 1825 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1826 | { |
c97c23e3 | 1827 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1828 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1829 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1830 | ||
1831 | /* | |
1832 | * Allow EAPOL frames to us/the PAE group address regardless | |
1833 | * of whether the frame was encrypted or not. | |
1834 | */ | |
a621fa4d | 1835 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1836 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1837 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1838 | return true; |
1839 | ||
1840 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1841 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1842 | return false; |
1843 | ||
1844 | return true; | |
1845 | } | |
1846 | ||
1847 | /* | |
1848 | * requires that rx->skb is a frame with ethernet header | |
1849 | */ | |
76ee65bf | 1850 | static void |
5cf121c3 | 1851 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1852 | { |
eb9fb5b8 JB |
1853 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1854 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1855 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1856 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1857 | struct sta_info *dsta; | |
554891e6 | 1858 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1859 | |
76ee65bf RR |
1860 | skb = rx->skb; |
1861 | xmit_skb = NULL; | |
571ecf67 | 1862 | |
05c914fe JB |
1863 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1864 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1865 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1866 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1867 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1868 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1869 | /* | |
1870 | * send multicast frames both to higher layers in | |
1871 | * local net stack and back to the wireless medium | |
1872 | */ | |
76ee65bf | 1873 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1874 | if (!xmit_skb) |
bdcbd8e0 | 1875 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1876 | dev->name); |
571ecf67 | 1877 | } else { |
abe60632 JB |
1878 | dsta = sta_info_get(sdata, skb->data); |
1879 | if (dsta) { | |
ce3edf6d JB |
1880 | /* |
1881 | * The destination station is associated to | |
1882 | * this AP (in this VLAN), so send the frame | |
1883 | * directly to it and do not pass it to local | |
1884 | * net stack. | |
571ecf67 | 1885 | */ |
76ee65bf | 1886 | xmit_skb = skb; |
571ecf67 JB |
1887 | skb = NULL; |
1888 | } | |
571ecf67 JB |
1889 | } |
1890 | } | |
1891 | ||
1892 | if (skb) { | |
d1c3a37c JB |
1893 | int align __maybe_unused; |
1894 | ||
59d9cb07 | 1895 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
d1c3a37c JB |
1896 | /* |
1897 | * 'align' will only take the values 0 or 2 here | |
1898 | * since all frames are required to be aligned | |
1899 | * to 2-byte boundaries when being passed to | |
191922cd JB |
1900 | * mac80211; the code here works just as well if |
1901 | * that isn't true, but mac80211 assumes it can | |
1902 | * access fields as 2-byte aligned (e.g. for | |
1903 | * compare_ether_addr) | |
d1c3a37c | 1904 | */ |
dacb6f1d | 1905 | align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3; |
d1c3a37c JB |
1906 | if (align) { |
1907 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1908 | dev_kfree_skb(skb); | |
1909 | skb = NULL; | |
1910 | } else { | |
1911 | u8 *data = skb->data; | |
8ce0b589 ZY |
1912 | size_t len = skb_headlen(skb); |
1913 | skb->data -= align; | |
1914 | memmove(skb->data, data, len); | |
1915 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1916 | } |
1917 | } | |
1918 | #endif | |
1919 | ||
1920 | if (skb) { | |
1921 | /* deliver to local stack */ | |
1922 | skb->protocol = eth_type_trans(skb, dev); | |
1923 | memset(skb->cb, 0, sizeof(skb->cb)); | |
5548a8a1 | 1924 | netif_receive_skb(skb); |
d1c3a37c | 1925 | } |
571ecf67 JB |
1926 | } |
1927 | ||
76ee65bf | 1928 | if (xmit_skb) { |
aef6c928 HS |
1929 | /* |
1930 | * Send to wireless media and increase priority by 256 to | |
1931 | * keep the received priority instead of reclassifying | |
1932 | * the frame (see cfg80211_classify8021d). | |
1933 | */ | |
1934 | xmit_skb->priority += 256; | |
f831e909 | 1935 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1936 | skb_reset_network_header(xmit_skb); |
1937 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1938 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1939 | } |
76ee65bf RR |
1940 | } |
1941 | ||
49461622 | 1942 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1943 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 1944 | { |
eb9fb5b8 | 1945 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 1946 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
1947 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1948 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 1949 | struct sk_buff_head frame_list; |
554891e6 | 1950 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 1951 | |
358c8d9d | 1952 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 1953 | return RX_CONTINUE; |
fd4c7f2f | 1954 | |
358c8d9d | 1955 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 1956 | return RX_DROP_MONITOR; |
fd4c7f2f | 1957 | |
554891e6 | 1958 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 1959 | return RX_CONTINUE; |
fd4c7f2f | 1960 | |
eaf85ca7 ZY |
1961 | if (ieee80211_has_a4(hdr->frame_control) && |
1962 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1963 | !rx->sdata->u.vlan.sta) | |
e4c26add | 1964 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 1965 | |
eaf85ca7 ZY |
1966 | if (is_multicast_ether_addr(hdr->addr1) && |
1967 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1968 | rx->sdata->u.vlan.sta) || | |
1969 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
1970 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 1971 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 1972 | |
eaf85ca7 ZY |
1973 | skb->dev = dev; |
1974 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 1975 | |
e3cf8b3f ZY |
1976 | if (skb_linearize(skb)) |
1977 | return RX_DROP_UNUSABLE; | |
1978 | ||
eaf85ca7 ZY |
1979 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
1980 | rx->sdata->vif.type, | |
8b3becad | 1981 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 1982 | |
eaf85ca7 ZY |
1983 | while (!skb_queue_empty(&frame_list)) { |
1984 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 1985 | |
358c8d9d | 1986 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 1987 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
1988 | continue; |
1989 | } | |
eaf85ca7 ZY |
1990 | dev->stats.rx_packets++; |
1991 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
1992 | |
1993 | ieee80211_deliver_skb(rx); | |
1994 | } | |
1995 | ||
9ae54c84 | 1996 | return RX_QUEUED; |
fd4c7f2f RR |
1997 | } |
1998 | ||
bf94e17b | 1999 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2000 | static ieee80211_rx_result |
e32f85f7 LCC |
2001 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2002 | { | |
30789eb6 TP |
2003 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2004 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2005 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2006 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2007 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2008 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2009 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2010 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
0cfda851 | 2011 | __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD); |
30789eb6 | 2012 | u16 q, hdrlen; |
e32f85f7 LCC |
2013 | |
2014 | hdr = (struct ieee80211_hdr *) skb->data; | |
2015 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2016 | |
2017 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2018 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2019 | return RX_DROP_MONITOR; | |
2020 | ||
2021 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2022 | ||
2023 | /* make sure full mesh header is there, also checks skb len */ | |
2024 | if (!pskb_may_pull(rx->skb, | |
2025 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2026 | return RX_DROP_MONITOR; | |
2027 | ||
2028 | /* reload pointers */ | |
2029 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2030 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2031 | ||
2157fdd6 TP |
2032 | /* frame is in RMC, don't forward */ |
2033 | if (ieee80211_is_data(hdr->frame_control) && | |
2034 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2035 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2036 | return RX_DROP_MONITOR; |
2037 | ||
555cb715 JC |
2038 | if (!ieee80211_is_data(hdr->frame_control) || |
2039 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2040 | return RX_CONTINUE; |
2041 | ||
2042 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2043 | return RX_DROP_MONITOR; |
2044 | ||
43b7b314 | 2045 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2046 | struct mesh_path *mppath; |
43b7b314 JC |
2047 | char *proxied_addr; |
2048 | char *mpp_addr; | |
2049 | ||
2050 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2051 | mpp_addr = hdr->addr3; | |
2052 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2053 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2054 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2055 | mpp_addr = hdr->addr4; |
2056 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2057 | } else { |
2058 | return RX_DROP_MONITOR; | |
43b7b314 | 2059 | } |
79617dee | 2060 | |
79617dee | 2061 | rcu_read_lock(); |
bf7cd94d | 2062 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2063 | if (!mppath) { |
bf7cd94d | 2064 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2065 | } else { |
2066 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2067 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2068 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2069 | spin_unlock_bh(&mppath->state_lock); |
2070 | } | |
2071 | rcu_read_unlock(); | |
2072 | } | |
2073 | ||
3c5772a5 JC |
2074 | /* Frame has reached destination. Don't forward */ |
2075 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2076 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2077 | return RX_CONTINUE; |
2078 | ||
00e96dec | 2079 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2080 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2081 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2082 | return RX_DROP_MONITOR; |
2083 | } | |
2084 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2085 | |
30789eb6 TP |
2086 | if (!--mesh_hdr->ttl) { |
2087 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2088 | goto out; |
30789eb6 TP |
2089 | } |
2090 | ||
d665508b CYY |
2091 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2092 | goto out; | |
2093 | ||
30789eb6 TP |
2094 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2095 | if (!fwd_skb) { | |
bdcbd8e0 | 2096 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2097 | sdata->name); |
30789eb6 TP |
2098 | goto out; |
2099 | } | |
2100 | ||
2101 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2102 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2103 | info = IEEE80211_SKB_CB(fwd_skb); |
2104 | memset(info, 0, sizeof(*info)); | |
2105 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2106 | info->control.vif = &rx->sdata->vif; | |
2107 | info->control.jiffies = jiffies; | |
2108 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2109 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2110 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2111 | /* update power mode indication when forwarding */ |
2112 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2113 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2114 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2115 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2116 | } else { | |
2117 | /* unable to resolve next hop */ | |
bf7cd94d JB |
2118 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
2119 | fwd_hdr->addr3, 0, reason, fwd_hdr->addr2); | |
30789eb6 | 2120 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2121 | kfree_skb(fwd_skb); |
30789eb6 | 2122 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2123 | } |
2124 | ||
30789eb6 TP |
2125 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2126 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2127 | out: |
3c5772a5 | 2128 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2129 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2130 | return RX_CONTINUE; |
2131 | else | |
2132 | return RX_DROP_MONITOR; | |
2133 | } | |
bf94e17b | 2134 | #endif |
e32f85f7 | 2135 | |
49461622 | 2136 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2137 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2138 | { |
eb9fb5b8 | 2139 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2140 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2141 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2142 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2143 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2144 | bool port_control; |
ce3edf6d | 2145 | int err; |
76ee65bf | 2146 | |
358c8d9d | 2147 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2148 | return RX_CONTINUE; |
76ee65bf | 2149 | |
358c8d9d | 2150 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2151 | return RX_DROP_MONITOR; |
76ee65bf | 2152 | |
f14543ee | 2153 | /* |
e7f4a940 JB |
2154 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2155 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2156 | */ |
2157 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2158 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2159 | if (rx->sta && | |
2160 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2161 | cfg80211_rx_unexpected_4addr_frame( | |
2162 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2163 | return RX_DROP_MONITOR; |
e7f4a940 | 2164 | } |
f14543ee | 2165 | |
4114fa21 | 2166 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2167 | if (unlikely(err)) |
e4c26add | 2168 | return RX_DROP_UNUSABLE; |
76ee65bf | 2169 | |
358c8d9d | 2170 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2171 | return RX_DROP_MONITOR; |
ce3edf6d | 2172 | |
4114fa21 FF |
2173 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2174 | unlikely(port_control) && sdata->bss) { | |
2175 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2176 | u.ap); | |
2177 | dev = sdata->dev; | |
2178 | rx->sdata = sdata; | |
2179 | } | |
2180 | ||
76ee65bf RR |
2181 | rx->skb->dev = dev; |
2182 | ||
2183 | dev->stats.rx_packets++; | |
2184 | dev->stats.rx_bytes += rx->skb->len; | |
2185 | ||
08ca944e | 2186 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2187 | !is_multicast_ether_addr( |
2188 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2189 | (!local->scanning && | |
2190 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2191 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2192 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2193 | } | |
2194 | ||
76ee65bf | 2195 | ieee80211_deliver_skb(rx); |
571ecf67 | 2196 | |
9ae54c84 | 2197 | return RX_QUEUED; |
571ecf67 JB |
2198 | } |
2199 | ||
49461622 | 2200 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2201 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2202 | { |
71364716 | 2203 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2204 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2205 | struct tid_ampdu_rx *tid_agg_rx; |
2206 | u16 start_seq_num; | |
2207 | u16 tid; | |
2208 | ||
a7767f95 | 2209 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2210 | return RX_CONTINUE; |
71364716 | 2211 | |
a7767f95 | 2212 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2213 | struct { |
2214 | __le16 control, start_seq_num; | |
2215 | } __packed bar_data; | |
2216 | ||
71364716 | 2217 | if (!rx->sta) |
a02ae758 | 2218 | return RX_DROP_MONITOR; |
8ae5977f JB |
2219 | |
2220 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2221 | &bar_data, sizeof(bar_data))) | |
2222 | return RX_DROP_MONITOR; | |
2223 | ||
8ae5977f | 2224 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2225 | |
2226 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2227 | if (!tid_agg_rx) | |
a02ae758 | 2228 | return RX_DROP_MONITOR; |
71364716 | 2229 | |
8ae5977f | 2230 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2231 | |
2232 | /* reset session timer */ | |
20ad19d0 JB |
2233 | if (tid_agg_rx->timeout) |
2234 | mod_timer(&tid_agg_rx->session_timer, | |
2235 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2236 | |
dd318575 | 2237 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2238 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2239 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2240 | start_seq_num, frames); |
dd318575 JB |
2241 | spin_unlock(&tid_agg_rx->reorder_lock); |
2242 | ||
a02ae758 JB |
2243 | kfree_skb(skb); |
2244 | return RX_QUEUED; | |
71364716 RR |
2245 | } |
2246 | ||
08daecae JB |
2247 | /* |
2248 | * After this point, we only want management frames, | |
2249 | * so we can drop all remaining control frames to | |
2250 | * cooked monitor interfaces. | |
2251 | */ | |
2252 | return RX_DROP_MONITOR; | |
71364716 RR |
2253 | } |
2254 | ||
f4f727a6 JM |
2255 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2256 | struct ieee80211_mgmt *mgmt, | |
2257 | size_t len) | |
fea14732 JM |
2258 | { |
2259 | struct ieee80211_local *local = sdata->local; | |
2260 | struct sk_buff *skb; | |
2261 | struct ieee80211_mgmt *resp; | |
2262 | ||
b203ca39 | 2263 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2264 | /* Not to own unicast address */ |
2265 | return; | |
2266 | } | |
2267 | ||
b203ca39 JP |
2268 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2269 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2270 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2271 | return; |
2272 | } | |
2273 | ||
2274 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2275 | /* Too short SA Query request frame */ | |
2276 | return; | |
2277 | } | |
2278 | ||
2279 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2280 | if (skb == NULL) | |
2281 | return; | |
2282 | ||
2283 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2284 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2285 | memset(resp, 0, 24); | |
2286 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2287 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2288 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2289 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2290 | IEEE80211_STYPE_ACTION); | |
2291 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2292 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2293 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2294 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2295 | mgmt->u.action.u.sa_query.trans_id, | |
2296 | WLAN_SA_QUERY_TR_ID_LEN); | |
2297 | ||
62ae67be | 2298 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2299 | } |
2300 | ||
2e161f78 JB |
2301 | static ieee80211_rx_result debug_noinline |
2302 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2303 | { | |
2304 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2305 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2306 | |
2307 | /* | |
2308 | * From here on, look only at management frames. | |
2309 | * Data and control frames are already handled, | |
2310 | * and unknown (reserved) frames are useless. | |
2311 | */ | |
2312 | if (rx->skb->len < 24) | |
2313 | return RX_DROP_MONITOR; | |
2314 | ||
2315 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2316 | return RX_DROP_MONITOR; | |
2317 | ||
ee971924 JB |
2318 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2319 | ieee80211_is_beacon(mgmt->frame_control) && | |
2320 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2321 | int sig = 0; |
2322 | ||
2323 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2324 | sig = status->signal; | |
2325 | ||
ee971924 JB |
2326 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2327 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2328 | status->freq, sig); |
ee971924 JB |
2329 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2330 | } | |
2331 | ||
554891e6 | 2332 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2333 | return RX_DROP_MONITOR; |
2334 | ||
2335 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2336 | return RX_DROP_UNUSABLE; | |
2337 | ||
2338 | return RX_CONTINUE; | |
2339 | } | |
2340 | ||
de1ede7a JB |
2341 | static ieee80211_rx_result debug_noinline |
2342 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2343 | { | |
2344 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2345 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2346 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2347 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2348 | int len = rx->skb->len; |
2349 | ||
2350 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2351 | return RX_CONTINUE; | |
2352 | ||
026331c4 JM |
2353 | /* drop too small frames */ |
2354 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2355 | return RX_DROP_UNUSABLE; |
de1ede7a | 2356 | |
815b8092 MP |
2357 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
2358 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED) | |
84040805 | 2359 | return RX_DROP_UNUSABLE; |
de1ede7a | 2360 | |
554891e6 | 2361 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2362 | return RX_DROP_UNUSABLE; |
97ebe12a | 2363 | |
de1ede7a | 2364 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2365 | case WLAN_CATEGORY_HT: |
2366 | /* reject HT action frames from stations not supporting HT */ | |
2367 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2368 | goto invalid; | |
2369 | ||
2370 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2371 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2372 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2373 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2374 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2375 | break; | |
2376 | ||
ec61cd63 | 2377 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2378 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2379 | goto invalid; | |
2380 | ||
2381 | switch (mgmt->u.action.u.ht_smps.action) { | |
2382 | case WLAN_HT_ACTION_SMPS: { | |
2383 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2384 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2385 | |
2386 | /* convert to HT capability */ | |
2387 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2388 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2389 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2390 | break; |
2391 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2392 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2393 | break; |
2394 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2395 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2396 | break; |
2397 | default: | |
2398 | goto invalid; | |
2399 | } | |
1d8d3dec JB |
2400 | |
2401 | /* if no change do nothing */ | |
af0ed69b | 2402 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2403 | goto handled; |
af0ed69b | 2404 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2405 | |
2406 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2407 | ||
64f68e5d JB |
2408 | rate_control_rate_update(local, sband, rx->sta, |
2409 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2410 | goto handled; |
2411 | } | |
ec61cd63 JB |
2412 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2413 | struct ieee80211_supported_band *sband; | |
2414 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2415 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2416 | |
2417 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2418 | if (!(rx->sta->sta.ht_cap.cap & |
2419 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2420 | goto handled; |
2421 | ||
e1a0c6b3 JB |
2422 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2423 | new_bw = IEEE80211_STA_RX_BW_20; | |
2424 | else | |
2425 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2426 | |
e1a0c6b3 | 2427 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2428 | goto handled; |
2429 | ||
ec61cd63 JB |
2430 | sband = rx->local->hw.wiphy->bands[status->band]; |
2431 | ||
2432 | rate_control_rate_update(local, sband, rx->sta, | |
2433 | IEEE80211_RC_BW_CHANGED); | |
2434 | goto handled; | |
2435 | } | |
1d8d3dec JB |
2436 | default: |
2437 | goto invalid; | |
2438 | } | |
2439 | ||
0af83d3d | 2440 | break; |
1b3a2e49 JB |
2441 | case WLAN_CATEGORY_PUBLIC: |
2442 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2443 | goto invalid; | |
2444 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2445 | break; | |
2446 | if (!rx->sta) | |
2447 | break; | |
2448 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2449 | break; | |
2450 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2451 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2452 | break; | |
2453 | if (len < offsetof(struct ieee80211_mgmt, | |
2454 | u.action.u.ext_chan_switch.variable)) | |
2455 | goto invalid; | |
2456 | goto queue; | |
0af83d3d JB |
2457 | case WLAN_CATEGORY_VHT: |
2458 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2459 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2460 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2461 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2462 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2463 | break; | |
2464 | ||
2465 | /* verify action code is present */ | |
2466 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2467 | goto invalid; | |
2468 | ||
2469 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2470 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2471 | u8 opmode; | |
2472 | ||
2473 | /* verify opmode is present */ | |
2474 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2475 | goto invalid; | |
2476 | ||
2477 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2478 | ||
2479 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2480 | opmode, status->band, |
2481 | false); | |
0af83d3d JB |
2482 | goto handled; |
2483 | } | |
2484 | default: | |
2485 | break; | |
2486 | } | |
1d8d3dec | 2487 | break; |
de1ede7a | 2488 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2489 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2490 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2491 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2492 | sdata->vif.type != NL80211_IFTYPE_AP && |
2493 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2494 | break; |
8abd3f9b | 2495 | |
026331c4 JM |
2496 | /* verify action_code is present */ |
2497 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2498 | break; | |
2499 | ||
de1ede7a JB |
2500 | switch (mgmt->u.action.u.addba_req.action_code) { |
2501 | case WLAN_ACTION_ADDBA_REQ: | |
2502 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2503 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2504 | goto invalid; |
2505 | break; | |
de1ede7a JB |
2506 | case WLAN_ACTION_ADDBA_RESP: |
2507 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2508 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2509 | goto invalid; |
2510 | break; | |
de1ede7a JB |
2511 | case WLAN_ACTION_DELBA: |
2512 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2513 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2514 | goto invalid; |
2515 | break; | |
2516 | default: | |
2517 | goto invalid; | |
de1ede7a | 2518 | } |
bed7ee6e | 2519 | |
8b58ff83 | 2520 | goto queue; |
39192c0b | 2521 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
4797c7ba | 2522 | if (status->band != IEEE80211_BAND_5GHZ) |
84040805 | 2523 | break; |
46900298 JB |
2524 | |
2525 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2526 | break; |
46900298 | 2527 | |
026331c4 JM |
2528 | /* verify action_code is present */ |
2529 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2530 | break; | |
2531 | ||
39192c0b JB |
2532 | switch (mgmt->u.action.u.measurement.action_code) { |
2533 | case WLAN_ACTION_SPCT_MSR_REQ: | |
2534 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2535 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2536 | break; |
39192c0b | 2537 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2538 | goto handled; |
c481ec97 | 2539 | case WLAN_ACTION_SPCT_CHL_SWITCH: |
cc32abd4 | 2540 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
84040805 | 2541 | break; |
cc32abd4 | 2542 | |
b203ca39 | 2543 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
84040805 | 2544 | break; |
c481ec97 | 2545 | |
8b58ff83 | 2546 | goto queue; |
39192c0b JB |
2547 | } |
2548 | break; | |
fea14732 JM |
2549 | case WLAN_CATEGORY_SA_QUERY: |
2550 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2551 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2552 | break; |
2553 | ||
fea14732 JM |
2554 | switch (mgmt->u.action.u.sa_query.action) { |
2555 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2556 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2557 | break; |
fea14732 | 2558 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2559 | goto handled; |
fea14732 JM |
2560 | } |
2561 | break; | |
8db09850 | 2562 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2563 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2564 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2565 | break; | |
2566 | ||
8db09850 TP |
2567 | switch (mgmt->u.action.u.self_prot.action_code) { |
2568 | case WLAN_SP_MESH_PEERING_OPEN: | |
2569 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2570 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2571 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2572 | goto invalid; | |
a6dad6a2 | 2573 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2574 | /* userspace handles this frame */ |
2575 | break; | |
2576 | goto queue; | |
2577 | case WLAN_SP_MGK_INFORM: | |
2578 | case WLAN_SP_MGK_ACK: | |
2579 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2580 | goto invalid; | |
2581 | break; | |
2582 | } | |
2583 | break; | |
d3aaec8a | 2584 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2585 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2586 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2587 | break; | |
2588 | ||
77a121c3 JB |
2589 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2590 | break; | |
25d49e4d | 2591 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2592 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2593 | break; |
2594 | goto queue; | |
84040805 | 2595 | } |
026331c4 | 2596 | |
2e161f78 JB |
2597 | return RX_CONTINUE; |
2598 | ||
bed7ee6e | 2599 | invalid: |
554891e6 | 2600 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2601 | /* will return in the next handlers */ |
2602 | return RX_CONTINUE; | |
2603 | ||
2604 | handled: | |
2605 | if (rx->sta) | |
2606 | rx->sta->rx_packets++; | |
2607 | dev_kfree_skb(rx->skb); | |
2608 | return RX_QUEUED; | |
2609 | ||
2610 | queue: | |
2611 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2612 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2613 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2614 | if (rx->sta) | |
2615 | rx->sta->rx_packets++; | |
2616 | return RX_QUEUED; | |
2617 | } | |
2618 | ||
2619 | static ieee80211_rx_result debug_noinline | |
2620 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2621 | { | |
554891e6 | 2622 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2623 | int sig = 0; |
2e161f78 JB |
2624 | |
2625 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2626 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2627 | return RX_CONTINUE; |
d7907448 | 2628 | |
026331c4 JM |
2629 | /* |
2630 | * Getting here means the kernel doesn't know how to handle | |
2631 | * it, but maybe userspace does ... include returned frames | |
2632 | * so userspace can register for those to know whether ones | |
2633 | * it transmitted were processed or returned. | |
2634 | */ | |
026331c4 | 2635 | |
804483e9 JB |
2636 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2637 | sig = status->signal; | |
2638 | ||
71bbc994 | 2639 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
2e161f78 JB |
2640 | rx->skb->data, rx->skb->len, |
2641 | GFP_ATOMIC)) { | |
2642 | if (rx->sta) | |
2643 | rx->sta->rx_packets++; | |
2644 | dev_kfree_skb(rx->skb); | |
2645 | return RX_QUEUED; | |
2646 | } | |
2647 | ||
2e161f78 JB |
2648 | return RX_CONTINUE; |
2649 | } | |
2650 | ||
2651 | static ieee80211_rx_result debug_noinline | |
2652 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2653 | { | |
2654 | struct ieee80211_local *local = rx->local; | |
2655 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2656 | struct sk_buff *nskb; | |
2657 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2658 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2659 | |
2660 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2661 | return RX_CONTINUE; | |
2662 | ||
2663 | /* | |
2664 | * For AP mode, hostapd is responsible for handling any action | |
2665 | * frames that we didn't handle, including returning unknown | |
2666 | * ones. For all other modes we will return them to the sender, | |
2667 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2668 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2669 | * Newer versions of hostapd shall also use the management frame |
2670 | * registration mechanisms, but older ones still use cooked | |
2671 | * monitor interfaces so push all frames there. | |
2672 | */ | |
554891e6 | 2673 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2674 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2675 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2676 | return RX_DROP_MONITOR; | |
026331c4 | 2677 | |
4b5ebccc JB |
2678 | if (is_multicast_ether_addr(mgmt->da)) |
2679 | return RX_DROP_MONITOR; | |
2680 | ||
84040805 JB |
2681 | /* do not return rejected action frames */ |
2682 | if (mgmt->u.action.category & 0x80) | |
2683 | return RX_DROP_UNUSABLE; | |
2684 | ||
2685 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2686 | GFP_ATOMIC); | |
2687 | if (nskb) { | |
292b4df6 | 2688 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2689 | |
292b4df6 JL |
2690 | nmgmt->u.action.category |= 0x80; |
2691 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2692 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2693 | |
2694 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2695 | ||
07e5a5f5 JB |
2696 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2697 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2698 | ||
2699 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2700 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2701 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2702 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2703 | info->hw_queue = | |
2704 | local->hw.offchannel_tx_hw_queue; | |
2705 | } | |
2706 | ||
2707 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2708 | status->band); | |
de1ede7a | 2709 | } |
39192c0b JB |
2710 | dev_kfree_skb(rx->skb); |
2711 | return RX_QUEUED; | |
de1ede7a JB |
2712 | } |
2713 | ||
49461622 | 2714 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2715 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2716 | { |
eb9fb5b8 | 2717 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2718 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2719 | __le16 stype; | |
571ecf67 | 2720 | |
77a121c3 | 2721 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2722 | |
77a121c3 JB |
2723 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2724 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2725 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2726 | return RX_DROP_MONITOR; | |
472dbc45 | 2727 | |
77a121c3 | 2728 | switch (stype) { |
66e67e41 | 2729 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2730 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2731 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2732 | /* process for all: mesh, mlme, ibss */ | |
2733 | break; | |
66e67e41 JB |
2734 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2735 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2736 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2737 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2738 | if (is_multicast_ether_addr(mgmt->da) && |
2739 | !is_broadcast_ether_addr(mgmt->da)) | |
2740 | return RX_DROP_MONITOR; | |
2741 | ||
77a121c3 JB |
2742 | /* process only for station */ |
2743 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2744 | return RX_DROP_MONITOR; | |
2745 | break; | |
2746 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2747 | /* process only for ibss and mesh */ |
2748 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2749 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2750 | return RX_DROP_MONITOR; |
2751 | break; | |
2752 | default: | |
2753 | return RX_DROP_MONITOR; | |
2754 | } | |
f9d540ee | 2755 | |
77a121c3 | 2756 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2757 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2758 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2759 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2760 | if (rx->sta) |
2761 | rx->sta->rx_packets++; | |
46900298 | 2762 | |
77a121c3 | 2763 | return RX_QUEUED; |
571ecf67 JB |
2764 | } |
2765 | ||
5cf121c3 | 2766 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2767 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2768 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2769 | { |
2770 | struct ieee80211_sub_if_data *sdata; | |
2771 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2772 | struct sk_buff *skb = rx->skb, *skb2; |
2773 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2774 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2775 | int needed_headroom; |
3d30d949 | 2776 | |
554891e6 JB |
2777 | /* |
2778 | * If cooked monitor has been processed already, then | |
2779 | * don't do it again. If not, set the flag. | |
2780 | */ | |
2781 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2782 | goto out_free_skb; |
554891e6 | 2783 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2784 | |
152c477a JB |
2785 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2786 | if (!local->cooked_mntrs) | |
2787 | goto out_free_skb; | |
2788 | ||
293702a3 | 2789 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2790 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2791 | |
293702a3 JB |
2792 | if (skb_headroom(skb) < needed_headroom && |
2793 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2794 | goto out_free_skb; | |
3d30d949 | 2795 | |
293702a3 | 2796 | /* prepend radiotap information */ |
973ef21a FF |
2797 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2798 | false); | |
3d30d949 MW |
2799 | |
2800 | skb_set_mac_header(skb, 0); | |
2801 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2802 | skb->pkt_type = PACKET_OTHERHOST; | |
2803 | skb->protocol = htons(ETH_P_802_2); | |
2804 | ||
2805 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2806 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2807 | continue; |
2808 | ||
05c914fe | 2809 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2810 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2811 | continue; | |
2812 | ||
2813 | if (prev_dev) { | |
2814 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2815 | if (skb2) { | |
2816 | skb2->dev = prev_dev; | |
5548a8a1 | 2817 | netif_receive_skb(skb2); |
3d30d949 MW |
2818 | } |
2819 | } | |
2820 | ||
2821 | prev_dev = sdata->dev; | |
2822 | sdata->dev->stats.rx_packets++; | |
2823 | sdata->dev->stats.rx_bytes += skb->len; | |
2824 | } | |
2825 | ||
2826 | if (prev_dev) { | |
2827 | skb->dev = prev_dev; | |
5548a8a1 | 2828 | netif_receive_skb(skb); |
554891e6 JB |
2829 | return; |
2830 | } | |
3d30d949 MW |
2831 | |
2832 | out_free_skb: | |
2833 | dev_kfree_skb(skb); | |
2834 | } | |
2835 | ||
aa0c8636 CL |
2836 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2837 | ieee80211_rx_result res) | |
2838 | { | |
2839 | switch (res) { | |
2840 | case RX_DROP_MONITOR: | |
2841 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2842 | if (rx->sta) | |
2843 | rx->sta->rx_dropped++; | |
2844 | /* fall through */ | |
2845 | case RX_CONTINUE: { | |
2846 | struct ieee80211_rate *rate = NULL; | |
2847 | struct ieee80211_supported_band *sband; | |
2848 | struct ieee80211_rx_status *status; | |
2849 | ||
2850 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2851 | ||
2852 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2853 | if (!(status->flag & RX_FLAG_HT) && |
2854 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2855 | rate = &sband->bitrates[status->rate_idx]; |
2856 | ||
2857 | ieee80211_rx_cooked_monitor(rx, rate); | |
2858 | break; | |
2859 | } | |
2860 | case RX_DROP_UNUSABLE: | |
2861 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2862 | if (rx->sta) | |
2863 | rx->sta->rx_dropped++; | |
2864 | dev_kfree_skb(rx->skb); | |
2865 | break; | |
2866 | case RX_QUEUED: | |
2867 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2868 | break; | |
2869 | } | |
2870 | } | |
571ecf67 | 2871 | |
f9e124fb CL |
2872 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2873 | struct sk_buff_head *frames) | |
58905290 | 2874 | { |
58905290 | 2875 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2876 | struct sk_buff *skb; |
8944b79f | 2877 | |
e32f85f7 LCC |
2878 | #define CALL_RXH(rxh) \ |
2879 | do { \ | |
2880 | res = rxh(rx); \ | |
2881 | if (res != RX_CONTINUE) \ | |
2569a826 | 2882 | goto rxh_next; \ |
e32f85f7 | 2883 | } while (0); |
49461622 | 2884 | |
f9e124fb | 2885 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2886 | |
f9e124fb | 2887 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2888 | /* |
2889 | * all the other fields are valid across frames | |
2890 | * that belong to an aMPDU since they are on the | |
2891 | * same TID from the same station | |
2892 | */ | |
2893 | rx->skb = skb; | |
2894 | ||
2895 | CALL_RXH(ieee80211_rx_h_decrypt) | |
2896 | CALL_RXH(ieee80211_rx_h_check_more_data) | |
47086fc5 | 2897 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 JB |
2898 | CALL_RXH(ieee80211_rx_h_sta_process) |
2899 | CALL_RXH(ieee80211_rx_h_defragment) | |
2569a826 JB |
2900 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2901 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2902 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2903 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2904 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2905 | #endif |
2154c81c | 2906 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2907 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
2908 | |
2909 | /* special treatment -- needs the queue */ | |
2910 | res = ieee80211_rx_h_ctrl(rx, frames); | |
2911 | if (res != RX_CONTINUE) | |
2912 | goto rxh_next; | |
2913 | ||
2e161f78 | 2914 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 2915 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
2916 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
2917 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 2918 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 2919 | |
aa0c8636 CL |
2920 | rxh_next: |
2921 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 2922 | |
49461622 | 2923 | #undef CALL_RXH |
aa0c8636 | 2924 | } |
24a8fdad | 2925 | |
f9e124fb | 2926 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
2927 | } |
2928 | ||
4406c376 | 2929 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 2930 | { |
f9e124fb | 2931 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
2932 | ieee80211_rx_result res = RX_DROP_MONITOR; |
2933 | ||
f9e124fb CL |
2934 | __skb_queue_head_init(&reorder_release); |
2935 | ||
aa0c8636 CL |
2936 | #define CALL_RXH(rxh) \ |
2937 | do { \ | |
2938 | res = rxh(rx); \ | |
2939 | if (res != RX_CONTINUE) \ | |
2940 | goto rxh_next; \ | |
2941 | } while (0); | |
2942 | ||
aa0c8636 CL |
2943 | CALL_RXH(ieee80211_rx_h_check) |
2944 | ||
f9e124fb | 2945 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 2946 | |
f9e124fb | 2947 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 2948 | return; |
49461622 | 2949 | |
2569a826 | 2950 | rxh_next: |
aa0c8636 CL |
2951 | ieee80211_rx_handlers_result(rx, res); |
2952 | ||
2953 | #undef CALL_RXH | |
58905290 JB |
2954 | } |
2955 | ||
2bff8ebf | 2956 | /* |
dd318575 JB |
2957 | * This function makes calls into the RX path, therefore |
2958 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
2959 | */ |
2960 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
2961 | { | |
f9e124fb | 2962 | struct sk_buff_head frames; |
554891e6 JB |
2963 | struct ieee80211_rx_data rx = { |
2964 | .sta = sta, | |
2965 | .sdata = sta->sdata, | |
2966 | .local = sta->local, | |
9e26297a JB |
2967 | /* This is OK -- must be QoS data frame */ |
2968 | .security_idx = tid, | |
2969 | .seqno_idx = tid, | |
fcf8bd3b | 2970 | .flags = 0, |
554891e6 | 2971 | }; |
2c15a0cf CL |
2972 | struct tid_ampdu_rx *tid_agg_rx; |
2973 | ||
2974 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
2975 | if (!tid_agg_rx) | |
2976 | return; | |
2bff8ebf | 2977 | |
f9e124fb CL |
2978 | __skb_queue_head_init(&frames); |
2979 | ||
2c15a0cf | 2980 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 2981 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 2982 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 2983 | |
f9e124fb | 2984 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
2985 | } |
2986 | ||
571ecf67 JB |
2987 | /* main receive path */ |
2988 | ||
20b01f80 | 2989 | static int prepare_for_handlers(struct ieee80211_rx_data *rx, |
23a24def JB |
2990 | struct ieee80211_hdr *hdr) |
2991 | { | |
20b01f80 | 2992 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
2993 | struct sk_buff *skb = rx->skb; |
2994 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
2995 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
2996 | int multicast = is_multicast_ether_addr(hdr->addr1); |
2997 | ||
51fb61e7 | 2998 | switch (sdata->vif.type) { |
05c914fe | 2999 | case NL80211_IFTYPE_STATION: |
9bc383de | 3000 | if (!bssid && !sdata->u.mgd.use_4addr) |
23a24def | 3001 | return 0; |
77fdaa12 | 3002 | if (!multicast && |
b203ca39 | 3003 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3004 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3005 | sdata->u.mgd.use_4addr) | |
23a24def | 3006 | return 0; |
554891e6 | 3007 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3008 | } |
3009 | break; | |
05c914fe | 3010 | case NL80211_IFTYPE_ADHOC: |
23a24def JB |
3011 | if (!bssid) |
3012 | return 0; | |
a7767f95 | 3013 | if (ieee80211_is_beacon(hdr->frame_control)) { |
9d9bf77d | 3014 | return 1; |
d48b2968 JB |
3015 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3016 | return 0; | |
23a24def | 3017 | } else if (!multicast && |
b203ca39 | 3018 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3019 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 3020 | return 0; |
554891e6 | 3021 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3022 | } else if (!rx->sta) { |
3023 | int rate_idx; | |
5614618e JB |
3024 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3025 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3026 | else |
eb9fb5b8 | 3027 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3028 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3029 | BIT(rate_idx)); | |
0fb8ca45 | 3030 | } |
23a24def | 3031 | break; |
05c914fe | 3032 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3033 | if (!multicast && |
b203ca39 | 3034 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 JB |
3035 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3036 | return 0; | |
3037 | ||
554891e6 | 3038 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3039 | } |
3040 | break; | |
05c914fe JB |
3041 | case NL80211_IFTYPE_AP_VLAN: |
3042 | case NL80211_IFTYPE_AP: | |
23a24def | 3043 | if (!bssid) { |
b203ca39 | 3044 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
23a24def | 3045 | return 0; |
f142c6b9 | 3046 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3047 | /* |
3048 | * Accept public action frames even when the | |
3049 | * BSSID doesn't match, this is used for P2P | |
3050 | * and location updates. Note that mac80211 | |
3051 | * itself never looks at these frames. | |
3052 | */ | |
d48b2968 | 3053 | if (ieee80211_is_public_action(hdr, skb->len)) |
3df6eaea | 3054 | return 1; |
d48b2968 | 3055 | if (!ieee80211_is_beacon(hdr->frame_control)) |
23a24def | 3056 | return 0; |
554891e6 | 3057 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 3058 | } |
23a24def | 3059 | break; |
05c914fe | 3060 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3061 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
23a24def | 3062 | return 0; |
b203ca39 | 3063 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
23a24def JB |
3064 | return 0; |
3065 | break; | |
f142c6b9 JB |
3066 | case NL80211_IFTYPE_P2P_DEVICE: |
3067 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3068 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3069 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3070 | !ieee80211_is_beacon(hdr->frame_control)) | |
3071 | return 0; | |
1b737f88 JB |
3072 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3073 | !multicast) | |
f142c6b9 JB |
3074 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3075 | break; | |
2ca27bcf | 3076 | default: |
fb1c1cd6 | 3077 | /* should never get here */ |
f142c6b9 | 3078 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3079 | break; |
23a24def JB |
3080 | } |
3081 | ||
3082 | return 1; | |
3083 | } | |
3084 | ||
4406c376 JB |
3085 | /* |
3086 | * This function returns whether or not the SKB | |
3087 | * was destined for RX processing or not, which, | |
3088 | * if consume is true, is equivalent to whether | |
3089 | * or not the skb was consumed. | |
3090 | */ | |
3091 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3092 | struct sk_buff *skb, bool consume) | |
3093 | { | |
3094 | struct ieee80211_local *local = rx->local; | |
3095 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3096 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3097 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3098 | int prepares; | |
3099 | ||
3100 | rx->skb = skb; | |
554891e6 | 3101 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 JB |
3102 | prepares = prepare_for_handlers(rx, hdr); |
3103 | ||
3104 | if (!prepares) | |
3105 | return false; | |
3106 | ||
4406c376 JB |
3107 | if (!consume) { |
3108 | skb = skb_copy(skb, GFP_ATOMIC); | |
3109 | if (!skb) { | |
3110 | if (net_ratelimit()) | |
3111 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3112 | "failed to copy skb for %s\n", |
4406c376 JB |
3113 | sdata->name); |
3114 | return true; | |
3115 | } | |
3116 | ||
3117 | rx->skb = skb; | |
3118 | } | |
3119 | ||
3120 | ieee80211_invoke_rx_handlers(rx); | |
3121 | return true; | |
3122 | } | |
3123 | ||
571ecf67 | 3124 | /* |
6368e4b1 RR |
3125 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
3126 | * be called with rcu_read_lock protection. | |
571ecf67 | 3127 | */ |
71ebb4aa | 3128 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3129 | struct sk_buff *skb) |
571ecf67 JB |
3130 | { |
3131 | struct ieee80211_local *local = hw_to_local(hw); | |
3132 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3133 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3134 | __le16 fc; |
5cf121c3 | 3135 | struct ieee80211_rx_data rx; |
4406c376 | 3136 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3137 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3138 | int err = 0; |
571ecf67 | 3139 | |
e3cf8b3f | 3140 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3141 | memset(&rx, 0, sizeof(rx)); |
3142 | rx.skb = skb; | |
3143 | rx.local = local; | |
72abd81b | 3144 | |
e3cf8b3f | 3145 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3146 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3147 | |
4a4f1a58 JB |
3148 | if (ieee80211_is_mgmt(fc)) { |
3149 | /* drop frame if too short for header */ | |
3150 | if (skb->len < ieee80211_hdrlen(fc)) | |
3151 | err = -ENOBUFS; | |
3152 | else | |
3153 | err = skb_linearize(skb); | |
3154 | } else { | |
e3cf8b3f | 3155 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3156 | } |
e3cf8b3f ZY |
3157 | |
3158 | if (err) { | |
3159 | dev_kfree_skb(skb); | |
3160 | return; | |
3161 | } | |
3162 | ||
3163 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3164 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3165 | ieee80211_verify_alignment(&rx); |
38f3714d | 3166 | |
d48b2968 JB |
3167 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3168 | ieee80211_is_beacon(hdr->frame_control))) | |
3169 | ieee80211_scan_rx(local, skb); | |
3170 | ||
e3cf8b3f | 3171 | if (ieee80211_is_data(fc)) { |
56af3268 | 3172 | prev_sta = NULL; |
4406c376 | 3173 | |
7852e361 | 3174 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3175 | if (!prev_sta) { |
3176 | prev_sta = sta; | |
3177 | continue; | |
3178 | } | |
3179 | ||
3180 | rx.sta = prev_sta; | |
3181 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3182 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3183 | |
56af3268 | 3184 | prev_sta = sta; |
4406c376 | 3185 | } |
56af3268 BG |
3186 | |
3187 | if (prev_sta) { | |
3188 | rx.sta = prev_sta; | |
3189 | rx.sdata = prev_sta->sdata; | |
3190 | ||
4406c376 | 3191 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3192 | return; |
8e26d5ad | 3193 | goto out; |
56af3268 | 3194 | } |
4406c376 JB |
3195 | } |
3196 | ||
4b0dd98e | 3197 | prev = NULL; |
b2e7771e | 3198 | |
4b0dd98e JB |
3199 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3200 | if (!ieee80211_sdata_running(sdata)) | |
3201 | continue; | |
340e11f3 | 3202 | |
4b0dd98e JB |
3203 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3204 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3205 | continue; | |
340e11f3 | 3206 | |
4b0dd98e JB |
3207 | /* |
3208 | * frame is destined for this interface, but if it's | |
3209 | * not also for the previous one we handle that after | |
3210 | * the loop to avoid copying the SKB once too much | |
3211 | */ | |
4bb29f8c | 3212 | |
4b0dd98e | 3213 | if (!prev) { |
abe60632 | 3214 | prev = sdata; |
4b0dd98e | 3215 | continue; |
340e11f3 | 3216 | } |
4bb29f8c | 3217 | |
7852e361 | 3218 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3219 | rx.sdata = prev; |
3220 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3221 | |
4b0dd98e JB |
3222 | prev = sdata; |
3223 | } | |
3224 | ||
3225 | if (prev) { | |
7852e361 | 3226 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3227 | rx.sdata = prev; |
4406c376 | 3228 | |
4b0dd98e JB |
3229 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3230 | return; | |
571ecf67 | 3231 | } |
4406c376 | 3232 | |
8e26d5ad | 3233 | out: |
4406c376 | 3234 | dev_kfree_skb(skb); |
571ecf67 | 3235 | } |
6368e4b1 RR |
3236 | |
3237 | /* | |
3238 | * This is the receive path handler. It is called by a low level driver when an | |
3239 | * 802.11 MPDU is received from the hardware. | |
3240 | */ | |
103bf9f7 | 3241 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3242 | { |
3243 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3244 | struct ieee80211_rate *rate = NULL; |
3245 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3246 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3247 | |
d20ef63d JB |
3248 | WARN_ON_ONCE(softirq_count() == 0); |
3249 | ||
444e3803 | 3250 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3251 | goto drop; |
8318d78a JB |
3252 | |
3253 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3254 | if (WARN_ON(!sband)) |
3255 | goto drop; | |
8318d78a | 3256 | |
89c3a8ac JB |
3257 | /* |
3258 | * If we're suspending, it is possible although not too likely | |
3259 | * that we'd be receiving frames after having already partially | |
3260 | * quiesced the stack. We can't process such frames then since | |
3261 | * that might, for example, cause stations to be added or other | |
3262 | * driver callbacks be invoked. | |
3263 | */ | |
77a980dc JB |
3264 | if (unlikely(local->quiescing || local->suspended)) |
3265 | goto drop; | |
89c3a8ac | 3266 | |
04800ada AN |
3267 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3268 | if (unlikely(local->in_reconfig)) | |
3269 | goto drop; | |
3270 | ||
ea77f12f JB |
3271 | /* |
3272 | * The same happens when we're not even started, | |
3273 | * but that's worth a warning. | |
3274 | */ | |
77a980dc JB |
3275 | if (WARN_ON(!local->started)) |
3276 | goto drop; | |
ea77f12f | 3277 | |
fc885189 | 3278 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3279 | /* |
fc885189 JB |
3280 | * Validate the rate, unless a PLCP error means that |
3281 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3282 | */ |
fc885189 JB |
3283 | |
3284 | if (status->flag & RX_FLAG_HT) { | |
3285 | /* | |
3286 | * rate_idx is MCS index, which can be [0-76] | |
3287 | * as documented on: | |
3288 | * | |
3289 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3290 | * | |
3291 | * Anything else would be some sort of driver or | |
3292 | * hardware error. The driver should catch hardware | |
3293 | * errors. | |
3294 | */ | |
444e3803 | 3295 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3296 | "Rate marked as an HT rate but passed " |
3297 | "status->rate_idx is not " | |
3298 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3299 | status->rate_idx, | |
3300 | status->rate_idx)) | |
3301 | goto drop; | |
5614618e JB |
3302 | } else if (status->flag & RX_FLAG_VHT) { |
3303 | if (WARN_ONCE(status->rate_idx > 9 || | |
3304 | !status->vht_nss || | |
3305 | status->vht_nss > 8, | |
3306 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3307 | status->rate_idx, status->vht_nss)) | |
3308 | goto drop; | |
fc885189 | 3309 | } else { |
444e3803 | 3310 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3311 | goto drop; |
3312 | rate = &sband->bitrates[status->rate_idx]; | |
3313 | } | |
0fb8ca45 | 3314 | } |
6368e4b1 | 3315 | |
554891e6 JB |
3316 | status->rx_flags = 0; |
3317 | ||
6368e4b1 RR |
3318 | /* |
3319 | * key references and virtual interfaces are protected using RCU | |
3320 | * and this requires that we are in a read-side RCU section during | |
3321 | * receive processing | |
3322 | */ | |
3323 | rcu_read_lock(); | |
3324 | ||
3325 | /* | |
3326 | * Frames with failed FCS/PLCP checksum are not returned, | |
3327 | * all other frames are returned without radiotap header | |
3328 | * if it was previously present. | |
3329 | * Also, frames with less than 16 bytes are dropped. | |
3330 | */ | |
f1d58c25 | 3331 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3332 | if (!skb) { |
3333 | rcu_read_unlock(); | |
3334 | return; | |
3335 | } | |
3336 | ||
e1e54068 JB |
3337 | ieee80211_tpt_led_trig_rx(local, |
3338 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3339 | skb->len); | |
071d9ac2 | 3340 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3341 | |
3342 | rcu_read_unlock(); | |
77a980dc JB |
3343 | |
3344 | return; | |
3345 | drop: | |
3346 | kfree_skb(skb); | |
6368e4b1 | 3347 | } |
103bf9f7 | 3348 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3349 | |
3350 | /* This is a version of the rx handler that can be called from hard irq | |
3351 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3352 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3353 | { |
3354 | struct ieee80211_local *local = hw_to_local(hw); | |
3355 | ||
3356 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3357 | ||
571ecf67 JB |
3358 | skb->pkt_type = IEEE80211_RX_MSG; |
3359 | skb_queue_tail(&local->skb_queue, skb); | |
3360 | tasklet_schedule(&local->tasklet); | |
3361 | } | |
3362 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |