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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 | |
1edfb1af JB |
651 | #define SEQ_MODULO 0x1000 |
652 | #define SEQ_MASK 0xfff | |
653 | ||
654 | static inline int seq_less(u16 sq1, u16 sq2) | |
655 | { | |
656 | return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1); | |
657 | } | |
658 | ||
659 | static inline u16 seq_inc(u16 sq) | |
660 | { | |
661 | return (sq + 1) & SEQ_MASK; | |
662 | } | |
663 | ||
664 | static inline u16 seq_sub(u16 sq1, u16 sq2) | |
665 | { | |
666 | return (sq1 - sq2) & SEQ_MASK; | |
667 | } | |
668 | ||
d3b2fb53 | 669 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 670 | struct tid_ampdu_rx *tid_agg_rx, |
24a8fdad | 671 | int index) |
1edfb1af | 672 | { |
d3b2fb53 | 673 | struct ieee80211_local *local = sdata->local; |
1edfb1af | 674 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 675 | struct ieee80211_rx_status *status; |
1edfb1af | 676 | |
dd318575 JB |
677 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
678 | ||
1edfb1af JB |
679 | if (!skb) |
680 | goto no_frame; | |
681 | ||
071d9ac2 | 682 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
683 | tid_agg_rx->stored_mpdu_num--; |
684 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
685 | status = IEEE80211_SKB_RXCB(skb); |
686 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
24a8fdad | 687 | skb_queue_tail(&local->rx_skb_queue, skb); |
1edfb1af JB |
688 | |
689 | no_frame: | |
690 | tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); | |
691 | } | |
692 | ||
d3b2fb53 | 693 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 694 | struct tid_ampdu_rx *tid_agg_rx, |
24a8fdad | 695 | u16 head_seq_num) |
1edfb1af JB |
696 | { |
697 | int index; | |
698 | ||
dd318575 JB |
699 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
700 | ||
1edfb1af JB |
701 | while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
702 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % | |
703 | tid_agg_rx->buf_size; | |
d3b2fb53 | 704 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index); |
1edfb1af JB |
705 | } |
706 | } | |
707 | ||
708 | /* | |
709 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
710 | * the skb was added to the buffer longer than this time ago, the earlier | |
711 | * frames that have not yet been received are assumed to be lost and the skb | |
712 | * can be released for processing. This may also release other skb's from the | |
713 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
714 | * |
715 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
716 | */ |
717 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
718 | ||
d3b2fb53 | 719 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
24a8fdad | 720 | struct tid_ampdu_rx *tid_agg_rx) |
aa0c8636 | 721 | { |
2bff8ebf | 722 | int index, j; |
aa0c8636 | 723 | |
dd318575 JB |
724 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
725 | ||
aa0c8636 CL |
726 | /* release the buffer until next missing frame */ |
727 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % | |
728 | tid_agg_rx->buf_size; | |
729 | if (!tid_agg_rx->reorder_buf[index] && | |
07ae2dfc | 730 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
731 | /* |
732 | * No buffers ready to be released, but check whether any | |
733 | * frames in the reorder buffer have timed out. | |
734 | */ | |
aa0c8636 CL |
735 | int skipped = 1; |
736 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
737 | j = (j + 1) % tid_agg_rx->buf_size) { | |
738 | if (!tid_agg_rx->reorder_buf[j]) { | |
739 | skipped++; | |
740 | continue; | |
741 | } | |
499fe9a4 DH |
742 | if (skipped && |
743 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 744 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 745 | goto set_release_timer; |
aa0c8636 | 746 | |
bdcbd8e0 JB |
747 | ht_dbg_ratelimited(sdata, |
748 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
d3b2fb53 | 749 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j); |
aa0c8636 CL |
750 | |
751 | /* | |
752 | * Increment the head seq# also for the skipped slots. | |
753 | */ | |
754 | tid_agg_rx->head_seq_num = | |
755 | (tid_agg_rx->head_seq_num + skipped) & SEQ_MASK; | |
756 | skipped = 0; | |
757 | } | |
758 | } else while (tid_agg_rx->reorder_buf[index]) { | |
d3b2fb53 | 759 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index); |
aa0c8636 CL |
760 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % |
761 | tid_agg_rx->buf_size; | |
762 | } | |
2bff8ebf CL |
763 | |
764 | if (tid_agg_rx->stored_mpdu_num) { | |
765 | j = index = seq_sub(tid_agg_rx->head_seq_num, | |
766 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
767 | ||
768 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
769 | j = (j + 1) % tid_agg_rx->buf_size) { | |
770 | if (tid_agg_rx->reorder_buf[j]) | |
771 | break; | |
772 | } | |
773 | ||
774 | set_release_timer: | |
775 | ||
776 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 777 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
778 | HT_RX_REORDER_BUF_TIMEOUT); |
779 | } else { | |
780 | del_timer(&tid_agg_rx->reorder_timer); | |
781 | } | |
aa0c8636 CL |
782 | } |
783 | ||
1edfb1af JB |
784 | /* |
785 | * As this function belongs to the RX path it must be under | |
786 | * rcu_read_lock protection. It returns false if the frame | |
787 | * can be processed immediately, true if it was consumed. | |
788 | */ | |
d3b2fb53 | 789 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 790 | struct tid_ampdu_rx *tid_agg_rx, |
24a8fdad | 791 | struct sk_buff *skb) |
1edfb1af JB |
792 | { |
793 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
794 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
795 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
796 | u16 head_seq_num, buf_size; | |
797 | int index; | |
2bff8ebf | 798 | bool ret = true; |
1edfb1af | 799 | |
dd318575 JB |
800 | spin_lock(&tid_agg_rx->reorder_lock); |
801 | ||
1edfb1af JB |
802 | buf_size = tid_agg_rx->buf_size; |
803 | head_seq_num = tid_agg_rx->head_seq_num; | |
804 | ||
805 | /* frame with out of date sequence number */ | |
806 | if (seq_less(mpdu_seq_num, head_seq_num)) { | |
807 | dev_kfree_skb(skb); | |
2bff8ebf | 808 | goto out; |
1edfb1af JB |
809 | } |
810 | ||
811 | /* | |
812 | * If frame the sequence number exceeds our buffering window | |
813 | * size release some previous frames to make room for this one. | |
814 | */ | |
815 | if (!seq_less(mpdu_seq_num, head_seq_num + buf_size)) { | |
816 | head_seq_num = seq_inc(seq_sub(mpdu_seq_num, buf_size)); | |
817 | /* release stored frames up to new head to stack */ | |
d3b2fb53 JB |
818 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
819 | head_seq_num); | |
1edfb1af JB |
820 | } |
821 | ||
822 | /* Now the new frame is always in the range of the reordering buffer */ | |
823 | ||
824 | index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
825 | ||
826 | /* check if we already stored this frame */ | |
827 | if (tid_agg_rx->reorder_buf[index]) { | |
828 | dev_kfree_skb(skb); | |
2bff8ebf | 829 | goto out; |
1edfb1af JB |
830 | } |
831 | ||
832 | /* | |
833 | * If the current MPDU is in the right order and nothing else | |
834 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
835 | * If it is first but there's something stored, we may be able |
836 | * to release frames after this one. | |
1edfb1af JB |
837 | */ |
838 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
839 | tid_agg_rx->stored_mpdu_num == 0) { | |
840 | tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
841 | ret = false; |
842 | goto out; | |
1edfb1af JB |
843 | } |
844 | ||
845 | /* put the frame in the reordering buffer */ | |
846 | tid_agg_rx->reorder_buf[index] = skb; | |
847 | tid_agg_rx->reorder_time[index] = jiffies; | |
848 | tid_agg_rx->stored_mpdu_num++; | |
d3b2fb53 | 849 | ieee80211_sta_reorder_release(sdata, tid_agg_rx); |
1edfb1af | 850 | |
2bff8ebf CL |
851 | out: |
852 | spin_unlock(&tid_agg_rx->reorder_lock); | |
853 | return ret; | |
1edfb1af JB |
854 | } |
855 | ||
856 | /* | |
857 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
858 | * true if the MPDU was buffered, false if it should be processed. | |
859 | */ | |
24a8fdad | 860 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx) |
1edfb1af | 861 | { |
2569a826 JB |
862 | struct sk_buff *skb = rx->skb; |
863 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 864 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 865 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 866 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
867 | struct tid_ampdu_rx *tid_agg_rx; |
868 | u16 sc; | |
6cc00d54 | 869 | u8 tid, ack_policy; |
1edfb1af JB |
870 | |
871 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
2569a826 | 872 | goto dont_reorder; |
1edfb1af JB |
873 | |
874 | /* | |
875 | * filter the QoS data rx stream according to | |
876 | * STA/TID and check if this STA/TID is on aggregation | |
877 | */ | |
878 | ||
1edfb1af | 879 | if (!sta) |
2569a826 | 880 | goto dont_reorder; |
1edfb1af | 881 | |
6cc00d54 TP |
882 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
883 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
884 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
885 | ||
a87f736d JB |
886 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
887 | if (!tid_agg_rx) | |
888 | goto dont_reorder; | |
1edfb1af JB |
889 | |
890 | /* qos null data frames are excluded */ | |
891 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 892 | goto dont_reorder; |
1edfb1af | 893 | |
6cc00d54 TP |
894 | /* not part of a BA session */ |
895 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
896 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
897 | goto dont_reorder; | |
898 | ||
660c6a44 TP |
899 | /* not actually part of this BA session */ |
900 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
901 | goto dont_reorder; | |
902 | ||
1edfb1af JB |
903 | /* new, potentially un-ordered, ampdu frame - process it */ |
904 | ||
905 | /* reset session timer */ | |
906 | if (tid_agg_rx->timeout) | |
12d3952f | 907 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
908 | |
909 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
910 | sc = le16_to_cpu(hdr->seq_ctrl); | |
911 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 912 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
913 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
914 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 915 | return; |
1edfb1af JB |
916 | } |
917 | ||
a87f736d JB |
918 | /* |
919 | * No locking needed -- we will only ever process one | |
920 | * RX packet at a time, and thus own tid_agg_rx. All | |
921 | * other code manipulating it needs to (and does) make | |
922 | * sure that we cannot get to it any more before doing | |
923 | * anything with it. | |
924 | */ | |
d3b2fb53 | 925 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb)) |
2569a826 JB |
926 | return; |
927 | ||
928 | dont_reorder: | |
24a8fdad | 929 | skb_queue_tail(&local->rx_skb_queue, skb); |
1edfb1af | 930 | } |
33b64eb2 | 931 | |
49461622 | 932 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 933 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 934 | { |
a7767f95 | 935 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 936 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 JB |
937 | |
938 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
939 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 940 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 941 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 942 | hdr->seq_ctrl)) { |
554891e6 | 943 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
944 | rx->local->dot11FrameDuplicateCount++; |
945 | rx->sta->num_duplicates++; | |
946 | } | |
b1f93314 | 947 | return RX_DROP_UNUSABLE; |
571ecf67 | 948 | } else |
9e26297a | 949 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
571ecf67 JB |
950 | } |
951 | ||
571ecf67 JB |
952 | if (unlikely(rx->skb->len < 16)) { |
953 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 954 | return RX_DROP_MONITOR; |
571ecf67 JB |
955 | } |
956 | ||
571ecf67 JB |
957 | /* Drop disallowed frame classes based on STA auth/assoc state; |
958 | * IEEE 802.11, Chap 5.5. | |
959 | * | |
ccd7b362 JB |
960 | * mac80211 filters only based on association state, i.e. it drops |
961 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
962 | * deauth/disassoc frames when needed. In addition, hostapd is |
963 | * responsible for filtering on both auth and assoc states. | |
964 | */ | |
33b64eb2 | 965 | |
902acc78 | 966 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 967 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 968 | |
a7767f95 HH |
969 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
970 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 971 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 972 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 973 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
974 | /* |
975 | * accept port control frames from the AP even when it's not | |
976 | * yet marked ASSOC to prevent a race where we don't set the | |
977 | * assoc bit quickly enough before it sends the first frame | |
978 | */ | |
979 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 980 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
981 | unsigned int hdrlen; |
982 | __be16 ethertype; | |
983 | ||
984 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
985 | ||
986 | if (rx->skb->len < hdrlen + 8) | |
987 | return RX_DROP_MONITOR; | |
988 | ||
989 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
990 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
991 | return RX_CONTINUE; |
992 | } | |
21fc7560 JB |
993 | |
994 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
995 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
996 | hdr->addr2, | |
997 | GFP_ATOMIC)) | |
998 | return RX_DROP_UNUSABLE; | |
999 | ||
e4c26add | 1000 | return RX_DROP_MONITOR; |
2a33bee2 | 1001 | } |
571ecf67 | 1002 | |
9ae54c84 | 1003 | return RX_CONTINUE; |
570bd537 JB |
1004 | } |
1005 | ||
1006 | ||
49461622 | 1007 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1008 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
570bd537 | 1009 | { |
eb9fb5b8 JB |
1010 | struct sk_buff *skb = rx->skb; |
1011 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1012 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
3017b80b JB |
1013 | int keyidx; |
1014 | int hdrlen; | |
e4c26add | 1015 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
e31b8213 | 1016 | struct ieee80211_key *sta_ptk = NULL; |
3cfcf6ac | 1017 | int mmie_keyidx = -1; |
761ab470 | 1018 | __le16 fc; |
570bd537 | 1019 | |
3017b80b JB |
1020 | /* |
1021 | * Key selection 101 | |
1022 | * | |
3cfcf6ac | 1023 | * There are four types of keys: |
3017b80b | 1024 | * - GTK (group keys) |
3cfcf6ac | 1025 | * - IGTK (group keys for management frames) |
3017b80b JB |
1026 | * - PTK (pairwise keys) |
1027 | * - STK (station-to-station pairwise keys) | |
1028 | * | |
1029 | * When selecting a key, we have to distinguish between multicast | |
1030 | * (including broadcast) and unicast frames, the latter can only | |
3cfcf6ac JM |
1031 | * use PTKs and STKs while the former always use GTKs and IGTKs. |
1032 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1033 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1034 | * don't have a PTK/STK we check the key index for a WEP key. | |
3017b80b | 1035 | * |
8dc06a1c JB |
1036 | * Note that in a regular BSS, multicast frames are sent by the |
1037 | * AP only, associated stations unicast the frame to the AP first | |
1038 | * which then multicasts it on their behalf. | |
1039 | * | |
3017b80b JB |
1040 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
1041 | * with each station, that is something we don't currently handle. | |
8dc06a1c JB |
1042 | * The spec seems to expect that one negotiates the same key with |
1043 | * every station but there's no such requirement; VLANs could be | |
1044 | * possible. | |
3017b80b JB |
1045 | */ |
1046 | ||
3017b80b | 1047 | /* |
1990af8d | 1048 | * No point in finding a key and decrypting if the frame is neither |
3017b80b JB |
1049 | * addressed to us nor a multicast frame. |
1050 | */ | |
554891e6 | 1051 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1052 | return RX_CONTINUE; |
3017b80b | 1053 | |
2569a826 JB |
1054 | /* start without a key */ |
1055 | rx->key = NULL; | |
1056 | ||
d4e46a3d | 1057 | if (rx->sta) |
e31b8213 | 1058 | sta_ptk = rcu_dereference(rx->sta->ptk); |
d4e46a3d | 1059 | |
761ab470 JB |
1060 | fc = hdr->frame_control; |
1061 | ||
1062 | if (!ieee80211_has_protected(fc)) | |
0c7c10c7 JM |
1063 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); |
1064 | ||
e31b8213 JB |
1065 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { |
1066 | rx->key = sta_ptk; | |
dc1580dd JB |
1067 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1068 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1069 | return RX_CONTINUE; | |
0c7c10c7 | 1070 | /* Skip decryption if the frame is not protected. */ |
761ab470 | 1071 | if (!ieee80211_has_protected(fc)) |
0c7c10c7 | 1072 | return RX_CONTINUE; |
3cfcf6ac JM |
1073 | } else if (mmie_keyidx >= 0) { |
1074 | /* Broadcast/multicast robust management frame / BIP */ | |
eb9fb5b8 JB |
1075 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1076 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
3cfcf6ac JM |
1077 | return RX_CONTINUE; |
1078 | ||
1079 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1080 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1081 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
e31b8213 JB |
1082 | if (rx->sta) |
1083 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1084 | if (!rx->key) | |
1085 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
761ab470 | 1086 | } else if (!ieee80211_has_protected(fc)) { |
0c7c10c7 JM |
1087 | /* |
1088 | * The frame was not protected, so skip decryption. However, we | |
1089 | * need to set rx->key if there is a key that could have been | |
1090 | * used so that the frame may be dropped if encryption would | |
1091 | * have been expected. | |
1092 | */ | |
1093 | struct ieee80211_key *key = NULL; | |
897bed8b JB |
1094 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1095 | int i; | |
1096 | ||
761ab470 | 1097 | if (ieee80211_is_mgmt(fc) && |
0c7c10c7 JM |
1098 | is_multicast_ether_addr(hdr->addr1) && |
1099 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1100 | rx->key = key; | |
897bed8b JB |
1101 | else { |
1102 | if (rx->sta) { | |
1103 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1104 | key = rcu_dereference(rx->sta->gtk[i]); | |
1105 | if (key) | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | if (!key) { | |
1110 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1111 | key = rcu_dereference(sdata->keys[i]); | |
1112 | if (key) | |
1113 | break; | |
1114 | } | |
1115 | } | |
1116 | if (key) | |
1117 | rx->key = key; | |
1118 | } | |
0c7c10c7 | 1119 | return RX_CONTINUE; |
571ecf67 | 1120 | } else { |
39184b15 | 1121 | u8 keyid; |
3017b80b JB |
1122 | /* |
1123 | * The device doesn't give us the IV so we won't be | |
1124 | * able to look up the key. That's ok though, we | |
1125 | * don't need to decrypt the frame, we just won't | |
1126 | * be able to keep statistics accurate. | |
1127 | * Except for key threshold notifications, should | |
1128 | * we somehow allow the driver to tell us which key | |
1129 | * the hardware used if this flag is set? | |
1130 | */ | |
eb9fb5b8 JB |
1131 | if ((status->flag & RX_FLAG_DECRYPTED) && |
1132 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
9ae54c84 | 1133 | return RX_CONTINUE; |
3017b80b | 1134 | |
761ab470 | 1135 | hdrlen = ieee80211_hdrlen(fc); |
3017b80b JB |
1136 | |
1137 | if (rx->skb->len < 8 + hdrlen) | |
e4c26add | 1138 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
3017b80b JB |
1139 | |
1140 | /* | |
1141 | * no need to call ieee80211_wep_get_keyidx, | |
1142 | * it verifies a bunch of things we've done already | |
1143 | */ | |
39184b15 ZY |
1144 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); |
1145 | keyidx = keyid >> 6; | |
3017b80b | 1146 | |
e31b8213 JB |
1147 | /* check per-station GTK first, if multicast packet */ |
1148 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1149 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
3017b80b | 1150 | |
e31b8213 JB |
1151 | /* if not found, try default key */ |
1152 | if (!rx->key) { | |
1153 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1154 | ||
1155 | /* | |
1156 | * RSNA-protected unicast frames should always be | |
1157 | * sent with pairwise or station-to-station keys, | |
1158 | * but for WEP we allow using a key index as well. | |
1159 | */ | |
1160 | if (rx->key && | |
1161 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1162 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1163 | !is_multicast_ether_addr(hdr->addr1)) | |
1164 | rx->key = NULL; | |
1165 | } | |
571ecf67 JB |
1166 | } |
1167 | ||
3017b80b | 1168 | if (rx->key) { |
95acac61 JB |
1169 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) |
1170 | return RX_DROP_MONITOR; | |
1171 | ||
571ecf67 | 1172 | rx->key->tx_rx_count++; |
011bfcc4 | 1173 | /* TODO: add threshold stuff again */ |
1990af8d | 1174 | } else { |
e4c26add | 1175 | return RX_DROP_MONITOR; |
70f08765 JB |
1176 | } |
1177 | ||
97359d12 JB |
1178 | switch (rx->key->conf.cipher) { |
1179 | case WLAN_CIPHER_SUITE_WEP40: | |
1180 | case WLAN_CIPHER_SUITE_WEP104: | |
e2f036da MN |
1181 | result = ieee80211_crypto_wep_decrypt(rx); |
1182 | break; | |
97359d12 | 1183 | case WLAN_CIPHER_SUITE_TKIP: |
e2f036da MN |
1184 | result = ieee80211_crypto_tkip_decrypt(rx); |
1185 | break; | |
97359d12 | 1186 | case WLAN_CIPHER_SUITE_CCMP: |
e2f036da MN |
1187 | result = ieee80211_crypto_ccmp_decrypt(rx); |
1188 | break; | |
97359d12 | 1189 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
1190 | result = ieee80211_crypto_aes_cmac_decrypt(rx); |
1191 | break; | |
3ffc2a90 JB |
1192 | default: |
1193 | /* | |
1194 | * We can reach here only with HW-only algorithms | |
1195 | * but why didn't it decrypt the frame?! | |
1196 | */ | |
1197 | return RX_DROP_UNUSABLE; | |
70f08765 JB |
1198 | } |
1199 | ||
a8286911 JB |
1200 | /* the hdr variable is invalid after the decrypt handlers */ |
1201 | ||
e2f036da | 1202 | /* either the frame has been decrypted or will be dropped */ |
eb9fb5b8 | 1203 | status->flag |= RX_FLAG_DECRYPTED; |
e2f036da MN |
1204 | |
1205 | return result; | |
70f08765 JB |
1206 | } |
1207 | ||
572e0012 KV |
1208 | static ieee80211_rx_result debug_noinline |
1209 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1210 | { | |
1211 | struct ieee80211_local *local; | |
1212 | struct ieee80211_hdr *hdr; | |
1213 | struct sk_buff *skb; | |
1214 | ||
1215 | local = rx->local; | |
1216 | skb = rx->skb; | |
1217 | hdr = (struct ieee80211_hdr *) skb->data; | |
1218 | ||
1219 | if (!local->pspolling) | |
1220 | return RX_CONTINUE; | |
1221 | ||
1222 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1223 | /* this is not from AP */ | |
1224 | return RX_CONTINUE; | |
1225 | ||
1226 | if (!ieee80211_is_data(hdr->frame_control)) | |
1227 | return RX_CONTINUE; | |
1228 | ||
1229 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1230 | /* AP has no more frames buffered for us */ | |
1231 | local->pspolling = false; | |
1232 | return RX_CONTINUE; | |
1233 | } | |
1234 | ||
1235 | /* more data bit is set, let's request a new frame from the AP */ | |
1236 | ieee80211_send_pspoll(local, rx->sdata); | |
1237 | ||
1238 | return RX_CONTINUE; | |
1239 | } | |
1240 | ||
d012a605 | 1241 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1242 | { |
133b8226 | 1243 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1244 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1245 | struct ps_data *ps; |
0795af57 | 1246 | |
d012a605 MP |
1247 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1248 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1249 | ps = &sdata->bss->ps; | |
1250 | else | |
1251 | return; | |
1252 | ||
1253 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1254 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1255 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1256 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1257 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1258 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1259 | } |
1260 | ||
d012a605 | 1261 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1262 | { |
bdcbd8e0 JB |
1263 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1264 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1265 | |
c2c98fde | 1266 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
bdcbd8e0 JB |
1267 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1268 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1269 | return; |
1270 | } | |
1271 | ||
1272 | ieee80211_sta_ps_deliver_wakeup(sta); | |
571ecf67 JB |
1273 | } |
1274 | ||
d057e5a3 AN |
1275 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1276 | { | |
1277 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1278 | bool in_ps; | |
1279 | ||
1280 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1281 | ||
1282 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1283 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1284 | if ((start && in_ps) || (!start && !in_ps)) |
1285 | return -EINVAL; | |
1286 | ||
1287 | if (start) | |
d012a605 | 1288 | sta_ps_start(sta_inf); |
d057e5a3 | 1289 | else |
d012a605 | 1290 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1291 | |
1292 | return 0; | |
1293 | } | |
1294 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1295 | ||
47086fc5 JB |
1296 | static ieee80211_rx_result debug_noinline |
1297 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1298 | { | |
1299 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1300 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1301 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1302 | int tid, ac; | |
1303 | ||
1304 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1305 | return RX_CONTINUE; | |
1306 | ||
1307 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1308 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1309 | return RX_CONTINUE; | |
1310 | ||
1311 | /* | |
1312 | * The device handles station powersave, so don't do anything about | |
1313 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1314 | * it to mac80211 since they're handled.) | |
1315 | */ | |
1316 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1317 | return RX_CONTINUE; | |
1318 | ||
1319 | /* | |
1320 | * Don't do anything if the station isn't already asleep. In | |
1321 | * the uAPSD case, the station will probably be marked asleep, | |
1322 | * in the PS-Poll case the station must be confused ... | |
1323 | */ | |
c2c98fde | 1324 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1325 | return RX_CONTINUE; |
1326 | ||
1327 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1328 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1329 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1330 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1331 | else | |
c2c98fde | 1332 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1333 | } |
47086fc5 JB |
1334 | |
1335 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1336 | * count as an dropped frame. */ | |
1337 | dev_kfree_skb(rx->skb); | |
1338 | ||
1339 | return RX_QUEUED; | |
1340 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1341 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1342 | ieee80211_has_pm(hdr->frame_control) && | |
1343 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1344 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1345 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1346 | ac = ieee802_1d_to_ac[tid & 7]; | |
1347 | ||
1348 | /* | |
1349 | * If this AC is not trigger-enabled do nothing. | |
1350 | * | |
1351 | * NB: This could/should check a separate bitmap of trigger- | |
1352 | * enabled queues, but for now we only implement uAPSD w/o | |
1353 | * TSPEC changes to the ACs, so they're always the same. | |
1354 | */ | |
1355 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1356 | return RX_CONTINUE; | |
1357 | ||
1358 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1359 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1360 | return RX_CONTINUE; |
1361 | ||
c2c98fde | 1362 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1363 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1364 | else | |
c2c98fde | 1365 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1366 | } |
1367 | ||
1368 | return RX_CONTINUE; | |
1369 | } | |
1370 | ||
49461622 | 1371 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1372 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1373 | { |
1374 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1375 | struct sk_buff *skb = rx->skb; |
1376 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1377 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
571ecf67 JB |
1378 | |
1379 | if (!sta) | |
9ae54c84 | 1380 | return RX_CONTINUE; |
571ecf67 | 1381 | |
b291ba11 JB |
1382 | /* |
1383 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1384 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1385 | * current IBSS network alive in cases where other STAs start | |
1386 | * using different BSSID. This will also give the station another | |
1387 | * chance to restart the authentication/authorization in case | |
1388 | * something went wrong the first time. | |
b291ba11 | 1389 | */ |
05c914fe | 1390 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1391 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1392 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1393 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1394 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1395 | sta->last_rx = jiffies; |
3af6334c FF |
1396 | if (ieee80211_is_data(hdr->frame_control)) { |
1397 | sta->last_rx_rate_idx = status->rate_idx; | |
1398 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1399 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1400 | } |
1401 | } | |
b291ba11 JB |
1402 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1403 | /* | |
33b64eb2 LCC |
1404 | * Mesh beacons will update last_rx when if they are found to |
1405 | * match the current local configuration when processed. | |
571ecf67 | 1406 | */ |
b291ba11 | 1407 | sta->last_rx = jiffies; |
3af6334c FF |
1408 | if (ieee80211_is_data(hdr->frame_control)) { |
1409 | sta->last_rx_rate_idx = status->rate_idx; | |
1410 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1411 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1412 | } |
571ecf67 JB |
1413 | } |
1414 | ||
554891e6 | 1415 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1416 | return RX_CONTINUE; |
571ecf67 | 1417 | |
3cf335d5 KV |
1418 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1419 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1420 | ||
571ecf67 JB |
1421 | sta->rx_fragments++; |
1422 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1423 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1424 | sta->last_signal = status->signal; | |
1425 | ewma_add(&sta->avg_signal, -status->signal); | |
1426 | } | |
571ecf67 | 1427 | |
72eaa43a JB |
1428 | /* |
1429 | * Change STA power saving mode only at the end of a frame | |
1430 | * exchange sequence. | |
1431 | */ | |
d057e5a3 AN |
1432 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1433 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1434 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe JB |
1435 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
1436 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { | |
c2c98fde | 1437 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
72eaa43a JB |
1438 | /* |
1439 | * Ignore doze->wake transitions that are | |
1440 | * indicated by non-data frames, the standard | |
1441 | * is unclear here, but for example going to | |
1442 | * PS mode and then scanning would cause a | |
1443 | * doze->wake transition for the probe request, | |
1444 | * and that is clearly undesirable. | |
1445 | */ | |
1446 | if (ieee80211_is_data(hdr->frame_control) && | |
1447 | !ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1448 | sta_ps_end(sta); |
72eaa43a JB |
1449 | } else { |
1450 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1451 | sta_ps_start(sta); |
72eaa43a | 1452 | } |
571ecf67 JB |
1453 | } |
1454 | ||
3f52b7e3 MP |
1455 | /* mesh power save support */ |
1456 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1457 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1458 | ||
22403def JB |
1459 | /* |
1460 | * Drop (qos-)data::nullfunc frames silently, since they | |
1461 | * are used only to control station power saving mode. | |
1462 | */ | |
1463 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1464 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1465 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1466 | |
1467 | /* | |
1468 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1469 | * that was not moved to a 4-addr STA vlan yet send |
1470 | * the event to userspace and for older hostapd drop | |
1471 | * the frame to the monitor interface. | |
d524215f FF |
1472 | */ |
1473 | if (ieee80211_has_a4(hdr->frame_control) && | |
1474 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1475 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1476 | !rx->sdata->u.vlan.sta))) { |
1477 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1478 | cfg80211_rx_unexpected_4addr_frame( | |
1479 | rx->sdata->dev, sta->sta.addr, | |
1480 | GFP_ATOMIC); | |
d524215f | 1481 | return RX_DROP_MONITOR; |
e7f4a940 | 1482 | } |
22403def JB |
1483 | /* |
1484 | * Update counter and free packet here to avoid | |
1485 | * counting this as a dropped packed. | |
1486 | */ | |
571ecf67 JB |
1487 | sta->rx_packets++; |
1488 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1489 | return RX_QUEUED; |
571ecf67 JB |
1490 | } |
1491 | ||
9ae54c84 | 1492 | return RX_CONTINUE; |
571ecf67 JB |
1493 | } /* ieee80211_rx_h_sta_process */ |
1494 | ||
571ecf67 JB |
1495 | static inline struct ieee80211_fragment_entry * |
1496 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1497 | unsigned int frag, unsigned int seq, int rx_queue, | |
1498 | struct sk_buff **skb) | |
1499 | { | |
1500 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1501 | |
571ecf67 JB |
1502 | entry = &sdata->fragments[sdata->fragment_next++]; |
1503 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1504 | sdata->fragment_next = 0; | |
1505 | ||
bdcbd8e0 | 1506 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1507 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1508 | |
1509 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1510 | *skb = NULL; | |
1511 | entry->first_frag_time = jiffies; | |
1512 | entry->seq = seq; | |
1513 | entry->rx_queue = rx_queue; | |
1514 | entry->last_frag = frag; | |
1515 | entry->ccmp = 0; | |
1516 | entry->extra_len = 0; | |
1517 | ||
1518 | return entry; | |
1519 | } | |
1520 | ||
1521 | static inline struct ieee80211_fragment_entry * | |
1522 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1523 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1524 | int rx_queue, struct ieee80211_hdr *hdr) |
1525 | { | |
1526 | struct ieee80211_fragment_entry *entry; | |
1527 | int i, idx; | |
1528 | ||
1529 | idx = sdata->fragment_next; | |
1530 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1531 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1532 | |
1533 | idx--; | |
1534 | if (idx < 0) | |
1535 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1536 | ||
1537 | entry = &sdata->fragments[idx]; | |
1538 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1539 | entry->rx_queue != rx_queue || | |
1540 | entry->last_frag + 1 != frag) | |
1541 | continue; | |
1542 | ||
b73d70ad | 1543 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1544 | |
b73d70ad HH |
1545 | /* |
1546 | * Check ftype and addresses are equal, else check next fragment | |
1547 | */ | |
1548 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1549 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1550 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1551 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1552 | continue; |
1553 | ||
ab46623e | 1554 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1555 | __skb_queue_purge(&entry->skb_list); |
1556 | continue; | |
1557 | } | |
1558 | return entry; | |
1559 | } | |
1560 | ||
1561 | return NULL; | |
1562 | } | |
1563 | ||
49461622 | 1564 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1565 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1566 | { |
1567 | struct ieee80211_hdr *hdr; | |
1568 | u16 sc; | |
358c8d9d | 1569 | __le16 fc; |
571ecf67 JB |
1570 | unsigned int frag, seq; |
1571 | struct ieee80211_fragment_entry *entry; | |
1572 | struct sk_buff *skb; | |
554891e6 | 1573 | struct ieee80211_rx_status *status; |
571ecf67 | 1574 | |
b73d70ad | 1575 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1576 | fc = hdr->frame_control; |
f7fbf70e JC |
1577 | |
1578 | if (ieee80211_is_ctl(fc)) | |
1579 | return RX_CONTINUE; | |
1580 | ||
571ecf67 JB |
1581 | sc = le16_to_cpu(hdr->seq_ctrl); |
1582 | frag = sc & IEEE80211_SCTL_FRAG; | |
1583 | ||
358c8d9d | 1584 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1585 | is_multicast_ether_addr(hdr->addr1))) { |
1586 | /* not fragmented */ | |
1587 | goto out; | |
1588 | } | |
1589 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1590 | ||
e3cf8b3f ZY |
1591 | if (skb_linearize(rx->skb)) |
1592 | return RX_DROP_UNUSABLE; | |
1593 | ||
058897a4 AK |
1594 | /* |
1595 | * skb_linearize() might change the skb->data and | |
1596 | * previously cached variables (in this case, hdr) need to | |
1597 | * be refreshed with the new data. | |
1598 | */ | |
1599 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1600 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1601 | ||
1602 | if (frag == 0) { | |
1603 | /* This is the first fragment of a new frame. */ | |
1604 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1605 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1606 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1607 | ieee80211_has_protected(fc)) { |
9e26297a | 1608 | int queue = rx->security_idx; |
571ecf67 JB |
1609 | /* Store CCMP PN so that we can verify that the next |
1610 | * fragment has a sequential PN value. */ | |
1611 | entry->ccmp = 1; | |
1612 | memcpy(entry->last_pn, | |
9190252c | 1613 | rx->key->u.ccmp.rx_pn[queue], |
571ecf67 JB |
1614 | CCMP_PN_LEN); |
1615 | } | |
9ae54c84 | 1616 | return RX_QUEUED; |
571ecf67 JB |
1617 | } |
1618 | ||
1619 | /* This is a fragment for a frame that should already be pending in | |
1620 | * fragment cache. Add this fragment to the end of the pending entry. | |
1621 | */ | |
9e26297a JB |
1622 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1623 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1624 | if (!entry) { |
1625 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1626 | return RX_DROP_MONITOR; |
571ecf67 JB |
1627 | } |
1628 | ||
1629 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1630 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1631 | if (entry->ccmp) { | |
1632 | int i; | |
1633 | u8 pn[CCMP_PN_LEN], *rpn; | |
9190252c | 1634 | int queue; |
97359d12 | 1635 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1636 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1637 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); |
1638 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
1639 | pn[i]++; | |
1640 | if (pn[i]) | |
1641 | break; | |
1642 | } | |
9e26297a | 1643 | queue = rx->security_idx; |
9190252c | 1644 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
f4ea83dd | 1645 | if (memcmp(pn, rpn, CCMP_PN_LEN)) |
e4c26add | 1646 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1647 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); |
1648 | } | |
1649 | ||
358c8d9d | 1650 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1651 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1652 | entry->last_frag = frag; | |
1653 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1654 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1655 | rx->skb = NULL; |
9ae54c84 | 1656 | return RX_QUEUED; |
571ecf67 JB |
1657 | } |
1658 | ||
1659 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1660 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1661 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1662 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1663 | GFP_ATOMIC))) { | |
1664 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1665 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1666 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1667 | } |
1668 | } | |
1669 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1670 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1671 | dev_kfree_skb(skb); | |
1672 | } | |
1673 | ||
1674 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1675 | status = IEEE80211_SKB_RXCB(rx->skb); |
1676 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1677 | |
1678 | out: | |
1679 | if (rx->sta) | |
1680 | rx->sta->rx_packets++; | |
1681 | if (is_multicast_ether_addr(hdr->addr1)) | |
1682 | rx->local->dot11MulticastReceivedFrameCount++; | |
1683 | else | |
1684 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1685 | return RX_CONTINUE; |
571ecf67 JB |
1686 | } |
1687 | ||
1df332e8 | 1688 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1689 | { |
1df332e8 | 1690 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1691 | return -EACCES; |
571ecf67 | 1692 | |
76ee65bf | 1693 | return 0; |
571ecf67 JB |
1694 | } |
1695 | ||
1df332e8 | 1696 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1697 | { |
eb9fb5b8 JB |
1698 | struct sk_buff *skb = rx->skb; |
1699 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1700 | ||
3017b80b | 1701 | /* |
7848ba7d JB |
1702 | * Pass through unencrypted frames if the hardware has |
1703 | * decrypted them already. | |
3017b80b | 1704 | */ |
eb9fb5b8 | 1705 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1706 | return 0; |
571ecf67 JB |
1707 | |
1708 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1709 | if (unlikely(!ieee80211_has_protected(fc) && |
1710 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1711 | ieee80211_is_data(fc) && |
b3fc9c6c | 1712 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1713 | return -EACCES; |
bef5d1c7 JB |
1714 | |
1715 | return 0; | |
1716 | } | |
1717 | ||
1df332e8 | 1718 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1719 | { |
1720 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1721 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1722 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1723 | |
e3efca0a JM |
1724 | /* |
1725 | * Pass through unencrypted frames if the hardware has | |
1726 | * decrypted them already. | |
1727 | */ | |
1728 | if (status->flag & RX_FLAG_DECRYPTED) | |
1729 | return 0; | |
bef5d1c7 | 1730 | |
c2c98fde | 1731 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1732 | if (unlikely(!ieee80211_has_protected(fc) && |
1733 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e JM |
1734 | rx->key)) { |
1735 | if (ieee80211_is_deauth(fc)) | |
1736 | cfg80211_send_unprot_deauth(rx->sdata->dev, | |
1737 | rx->skb->data, | |
1738 | rx->skb->len); | |
1739 | else if (ieee80211_is_disassoc(fc)) | |
1740 | cfg80211_send_unprot_disassoc(rx->sdata->dev, | |
1741 | rx->skb->data, | |
1742 | rx->skb->len); | |
f2ca3ea4 | 1743 | return -EACCES; |
cf4e594e | 1744 | } |
f2ca3ea4 | 1745 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1746 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e JM |
1747 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
1748 | if (ieee80211_is_deauth(fc)) | |
1749 | cfg80211_send_unprot_deauth(rx->sdata->dev, | |
1750 | rx->skb->data, | |
1751 | rx->skb->len); | |
1752 | else if (ieee80211_is_disassoc(fc)) | |
1753 | cfg80211_send_unprot_disassoc(rx->sdata->dev, | |
1754 | rx->skb->data, | |
1755 | rx->skb->len); | |
f2ca3ea4 | 1756 | return -EACCES; |
cf4e594e | 1757 | } |
f2ca3ea4 JM |
1758 | /* |
1759 | * When using MFP, Action frames are not allowed prior to | |
1760 | * having configured keys. | |
1761 | */ | |
1762 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
1763 | ieee80211_is_robust_mgmt_frame( | |
1764 | (struct ieee80211_hdr *) rx->skb->data))) | |
1765 | return -EACCES; | |
1766 | } | |
b3fc9c6c | 1767 | |
76ee65bf | 1768 | return 0; |
571ecf67 JB |
1769 | } |
1770 | ||
76ee65bf | 1771 | static int |
4114fa21 | 1772 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1773 | { |
eb9fb5b8 | 1774 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1775 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1776 | bool check_port_control = false; |
1777 | struct ethhdr *ehdr; | |
1778 | int ret; | |
f14543ee | 1779 | |
4114fa21 | 1780 | *port_control = false; |
9bc383de JB |
1781 | if (ieee80211_has_a4(hdr->frame_control) && |
1782 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1783 | return -1; |
9bc383de | 1784 | |
fbb327c5 FF |
1785 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1786 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1787 | ||
1788 | if (!sdata->u.mgd.use_4addr) | |
1789 | return -1; | |
1790 | else | |
1791 | check_port_control = true; | |
1792 | } | |
1793 | ||
9bc383de | 1794 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1795 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1796 | return -1; |
571ecf67 | 1797 | |
fbb327c5 | 1798 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1799 | if (ret < 0) |
fbb327c5 FF |
1800 | return ret; |
1801 | ||
1802 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1803 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1804 | *port_control = true; | |
1805 | else if (check_port_control) | |
fbb327c5 FF |
1806 | return -1; |
1807 | ||
1808 | return 0; | |
76ee65bf | 1809 | } |
571ecf67 | 1810 | |
ce3edf6d JB |
1811 | /* |
1812 | * requires that rx->skb is a frame with ethernet header | |
1813 | */ | |
358c8d9d | 1814 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1815 | { |
c97c23e3 | 1816 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1817 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1818 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1819 | ||
1820 | /* | |
1821 | * Allow EAPOL frames to us/the PAE group address regardless | |
1822 | * of whether the frame was encrypted or not. | |
1823 | */ | |
a621fa4d | 1824 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1825 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1826 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1827 | return true; |
1828 | ||
1829 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1830 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1831 | return false; |
1832 | ||
1833 | return true; | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * requires that rx->skb is a frame with ethernet header | |
1838 | */ | |
76ee65bf | 1839 | static void |
5cf121c3 | 1840 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1841 | { |
eb9fb5b8 JB |
1842 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1843 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1844 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1845 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1846 | struct sta_info *dsta; | |
554891e6 | 1847 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1848 | |
76ee65bf RR |
1849 | skb = rx->skb; |
1850 | xmit_skb = NULL; | |
571ecf67 | 1851 | |
05c914fe JB |
1852 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1853 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1854 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1855 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1856 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1857 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1858 | /* | |
1859 | * send multicast frames both to higher layers in | |
1860 | * local net stack and back to the wireless medium | |
1861 | */ | |
76ee65bf | 1862 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1863 | if (!xmit_skb) |
bdcbd8e0 | 1864 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1865 | dev->name); |
571ecf67 | 1866 | } else { |
abe60632 JB |
1867 | dsta = sta_info_get(sdata, skb->data); |
1868 | if (dsta) { | |
ce3edf6d JB |
1869 | /* |
1870 | * The destination station is associated to | |
1871 | * this AP (in this VLAN), so send the frame | |
1872 | * directly to it and do not pass it to local | |
1873 | * net stack. | |
571ecf67 | 1874 | */ |
76ee65bf | 1875 | xmit_skb = skb; |
571ecf67 JB |
1876 | skb = NULL; |
1877 | } | |
571ecf67 JB |
1878 | } |
1879 | } | |
1880 | ||
1881 | if (skb) { | |
d1c3a37c JB |
1882 | int align __maybe_unused; |
1883 | ||
59d9cb07 | 1884 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
d1c3a37c JB |
1885 | /* |
1886 | * 'align' will only take the values 0 or 2 here | |
1887 | * since all frames are required to be aligned | |
1888 | * to 2-byte boundaries when being passed to | |
1889 | * mac80211. That also explains the __skb_push() | |
1890 | * below. | |
1891 | */ | |
dacb6f1d | 1892 | align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3; |
d1c3a37c JB |
1893 | if (align) { |
1894 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1895 | dev_kfree_skb(skb); | |
1896 | skb = NULL; | |
1897 | } else { | |
1898 | u8 *data = skb->data; | |
8ce0b589 ZY |
1899 | size_t len = skb_headlen(skb); |
1900 | skb->data -= align; | |
1901 | memmove(skb->data, data, len); | |
1902 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1903 | } |
1904 | } | |
1905 | #endif | |
1906 | ||
1907 | if (skb) { | |
1908 | /* deliver to local stack */ | |
1909 | skb->protocol = eth_type_trans(skb, dev); | |
1910 | memset(skb->cb, 0, sizeof(skb->cb)); | |
5548a8a1 | 1911 | netif_receive_skb(skb); |
d1c3a37c | 1912 | } |
571ecf67 JB |
1913 | } |
1914 | ||
76ee65bf | 1915 | if (xmit_skb) { |
aef6c928 HS |
1916 | /* |
1917 | * Send to wireless media and increase priority by 256 to | |
1918 | * keep the received priority instead of reclassifying | |
1919 | * the frame (see cfg80211_classify8021d). | |
1920 | */ | |
1921 | xmit_skb->priority += 256; | |
f831e909 | 1922 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1923 | skb_reset_network_header(xmit_skb); |
1924 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1925 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1926 | } |
76ee65bf RR |
1927 | } |
1928 | ||
49461622 | 1929 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1930 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 1931 | { |
eb9fb5b8 | 1932 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 1933 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
1934 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1935 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 1936 | struct sk_buff_head frame_list; |
554891e6 | 1937 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 1938 | |
358c8d9d | 1939 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 1940 | return RX_CONTINUE; |
fd4c7f2f | 1941 | |
358c8d9d | 1942 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 1943 | return RX_DROP_MONITOR; |
fd4c7f2f | 1944 | |
554891e6 | 1945 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 1946 | return RX_CONTINUE; |
fd4c7f2f | 1947 | |
eaf85ca7 ZY |
1948 | if (ieee80211_has_a4(hdr->frame_control) && |
1949 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1950 | !rx->sdata->u.vlan.sta) | |
e4c26add | 1951 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 1952 | |
eaf85ca7 ZY |
1953 | if (is_multicast_ether_addr(hdr->addr1) && |
1954 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1955 | rx->sdata->u.vlan.sta) || | |
1956 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
1957 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 1958 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 1959 | |
eaf85ca7 ZY |
1960 | skb->dev = dev; |
1961 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 1962 | |
e3cf8b3f ZY |
1963 | if (skb_linearize(skb)) |
1964 | return RX_DROP_UNUSABLE; | |
1965 | ||
eaf85ca7 ZY |
1966 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
1967 | rx->sdata->vif.type, | |
8b3becad | 1968 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 1969 | |
eaf85ca7 ZY |
1970 | while (!skb_queue_empty(&frame_list)) { |
1971 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 1972 | |
358c8d9d | 1973 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 1974 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
1975 | continue; |
1976 | } | |
eaf85ca7 ZY |
1977 | dev->stats.rx_packets++; |
1978 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
1979 | |
1980 | ieee80211_deliver_skb(rx); | |
1981 | } | |
1982 | ||
9ae54c84 | 1983 | return RX_QUEUED; |
fd4c7f2f RR |
1984 | } |
1985 | ||
bf94e17b | 1986 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 1987 | static ieee80211_rx_result |
e32f85f7 LCC |
1988 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
1989 | { | |
30789eb6 TP |
1990 | struct ieee80211_hdr *fwd_hdr, *hdr; |
1991 | struct ieee80211_tx_info *info; | |
e32f85f7 | 1992 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 1993 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 1994 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 1995 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 1996 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 1997 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
0cfda851 | 1998 | __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD); |
30789eb6 | 1999 | u16 q, hdrlen; |
e32f85f7 LCC |
2000 | |
2001 | hdr = (struct ieee80211_hdr *) skb->data; | |
2002 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2003 | |
2004 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2005 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2006 | return RX_DROP_MONITOR; | |
2007 | ||
2008 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2009 | ||
2010 | /* make sure full mesh header is there, also checks skb len */ | |
2011 | if (!pskb_may_pull(rx->skb, | |
2012 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2013 | return RX_DROP_MONITOR; | |
2014 | ||
2015 | /* reload pointers */ | |
2016 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2017 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2018 | ||
2157fdd6 TP |
2019 | /* frame is in RMC, don't forward */ |
2020 | if (ieee80211_is_data(hdr->frame_control) && | |
2021 | is_multicast_ether_addr(hdr->addr1) && | |
2022 | mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata)) | |
2023 | return RX_DROP_MONITOR; | |
2024 | ||
555cb715 JC |
2025 | if (!ieee80211_is_data(hdr->frame_control) || |
2026 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2027 | return RX_CONTINUE; |
2028 | ||
2029 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2030 | return RX_DROP_MONITOR; |
2031 | ||
43b7b314 | 2032 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2033 | struct mesh_path *mppath; |
43b7b314 JC |
2034 | char *proxied_addr; |
2035 | char *mpp_addr; | |
2036 | ||
2037 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2038 | mpp_addr = hdr->addr3; | |
2039 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2040 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2041 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2042 | mpp_addr = hdr->addr4; |
2043 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2044 | } else { |
2045 | return RX_DROP_MONITOR; | |
43b7b314 | 2046 | } |
79617dee | 2047 | |
79617dee | 2048 | rcu_read_lock(); |
43b7b314 | 2049 | mppath = mpp_path_lookup(proxied_addr, sdata); |
79617dee | 2050 | if (!mppath) { |
43b7b314 | 2051 | mpp_path_add(proxied_addr, mpp_addr, sdata); |
79617dee Y |
2052 | } else { |
2053 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2054 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2055 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2056 | spin_unlock_bh(&mppath->state_lock); |
2057 | } | |
2058 | rcu_read_unlock(); | |
2059 | } | |
2060 | ||
3c5772a5 JC |
2061 | /* Frame has reached destination. Don't forward */ |
2062 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2063 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2064 | return RX_CONTINUE; |
2065 | ||
00e96dec | 2066 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2067 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2068 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2069 | return RX_DROP_MONITOR; |
2070 | } | |
2071 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2072 | |
30789eb6 TP |
2073 | if (!--mesh_hdr->ttl) { |
2074 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2075 | goto out; |
30789eb6 TP |
2076 | } |
2077 | ||
d665508b CYY |
2078 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2079 | goto out; | |
2080 | ||
30789eb6 TP |
2081 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2082 | if (!fwd_skb) { | |
bdcbd8e0 | 2083 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2084 | sdata->name); |
30789eb6 TP |
2085 | goto out; |
2086 | } | |
2087 | ||
2088 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
2089 | info = IEEE80211_SKB_CB(fwd_skb); | |
2090 | memset(info, 0, sizeof(*info)); | |
2091 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2092 | info->control.vif = &rx->sdata->vif; | |
2093 | info->control.jiffies = jiffies; | |
2094 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2095 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2096 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2097 | /* update power mode indication when forwarding */ |
2098 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
30789eb6 | 2099 | } else if (!mesh_nexthop_lookup(fwd_skb, sdata)) { |
3f52b7e3 | 2100 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2101 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2102 | } else { | |
2103 | /* unable to resolve next hop */ | |
2104 | mesh_path_error_tx(ifmsh->mshcfg.element_ttl, fwd_hdr->addr3, | |
1df332e8 | 2105 | 0, reason, fwd_hdr->addr2, sdata); |
30789eb6 | 2106 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2107 | kfree_skb(fwd_skb); |
30789eb6 | 2108 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2109 | } |
2110 | ||
30789eb6 TP |
2111 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2112 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2113 | out: |
3c5772a5 | 2114 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2115 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2116 | return RX_CONTINUE; |
2117 | else | |
2118 | return RX_DROP_MONITOR; | |
2119 | } | |
bf94e17b | 2120 | #endif |
e32f85f7 | 2121 | |
49461622 | 2122 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2123 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2124 | { |
eb9fb5b8 | 2125 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2126 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2127 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2128 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2129 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2130 | bool port_control; |
ce3edf6d | 2131 | int err; |
76ee65bf | 2132 | |
358c8d9d | 2133 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2134 | return RX_CONTINUE; |
76ee65bf | 2135 | |
358c8d9d | 2136 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2137 | return RX_DROP_MONITOR; |
76ee65bf | 2138 | |
f14543ee | 2139 | /* |
e7f4a940 JB |
2140 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2141 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2142 | */ |
2143 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2144 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2145 | if (rx->sta && | |
2146 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2147 | cfg80211_rx_unexpected_4addr_frame( | |
2148 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2149 | return RX_DROP_MONITOR; |
e7f4a940 | 2150 | } |
f14543ee | 2151 | |
4114fa21 | 2152 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2153 | if (unlikely(err)) |
e4c26add | 2154 | return RX_DROP_UNUSABLE; |
76ee65bf | 2155 | |
358c8d9d | 2156 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2157 | return RX_DROP_MONITOR; |
ce3edf6d | 2158 | |
4114fa21 FF |
2159 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2160 | unlikely(port_control) && sdata->bss) { | |
2161 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2162 | u.ap); | |
2163 | dev = sdata->dev; | |
2164 | rx->sdata = sdata; | |
2165 | } | |
2166 | ||
76ee65bf RR |
2167 | rx->skb->dev = dev; |
2168 | ||
2169 | dev->stats.rx_packets++; | |
2170 | dev->stats.rx_bytes += rx->skb->len; | |
2171 | ||
08ca944e | 2172 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2173 | !is_multicast_ether_addr( |
2174 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2175 | (!local->scanning && | |
2176 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2177 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2178 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2179 | } | |
2180 | ||
76ee65bf | 2181 | ieee80211_deliver_skb(rx); |
571ecf67 | 2182 | |
9ae54c84 | 2183 | return RX_QUEUED; |
571ecf67 JB |
2184 | } |
2185 | ||
49461622 | 2186 | static ieee80211_rx_result debug_noinline |
24a8fdad | 2187 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx) |
71364716 | 2188 | { |
71364716 | 2189 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2190 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2191 | struct tid_ampdu_rx *tid_agg_rx; |
2192 | u16 start_seq_num; | |
2193 | u16 tid; | |
2194 | ||
a7767f95 | 2195 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2196 | return RX_CONTINUE; |
71364716 | 2197 | |
a7767f95 | 2198 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2199 | struct { |
2200 | __le16 control, start_seq_num; | |
2201 | } __packed bar_data; | |
2202 | ||
71364716 | 2203 | if (!rx->sta) |
a02ae758 | 2204 | return RX_DROP_MONITOR; |
8ae5977f JB |
2205 | |
2206 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2207 | &bar_data, sizeof(bar_data))) | |
2208 | return RX_DROP_MONITOR; | |
2209 | ||
8ae5977f | 2210 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2211 | |
2212 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2213 | if (!tid_agg_rx) | |
a02ae758 | 2214 | return RX_DROP_MONITOR; |
71364716 | 2215 | |
8ae5977f | 2216 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2217 | |
2218 | /* reset session timer */ | |
20ad19d0 JB |
2219 | if (tid_agg_rx->timeout) |
2220 | mod_timer(&tid_agg_rx->session_timer, | |
2221 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2222 | |
dd318575 | 2223 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2224 | /* release stored frames up to start of BAR */ |
d3b2fb53 JB |
2225 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
2226 | start_seq_num); | |
dd318575 JB |
2227 | spin_unlock(&tid_agg_rx->reorder_lock); |
2228 | ||
a02ae758 JB |
2229 | kfree_skb(skb); |
2230 | return RX_QUEUED; | |
71364716 RR |
2231 | } |
2232 | ||
08daecae JB |
2233 | /* |
2234 | * After this point, we only want management frames, | |
2235 | * so we can drop all remaining control frames to | |
2236 | * cooked monitor interfaces. | |
2237 | */ | |
2238 | return RX_DROP_MONITOR; | |
71364716 RR |
2239 | } |
2240 | ||
f4f727a6 JM |
2241 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2242 | struct ieee80211_mgmt *mgmt, | |
2243 | size_t len) | |
fea14732 JM |
2244 | { |
2245 | struct ieee80211_local *local = sdata->local; | |
2246 | struct sk_buff *skb; | |
2247 | struct ieee80211_mgmt *resp; | |
2248 | ||
b203ca39 | 2249 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2250 | /* Not to own unicast address */ |
2251 | return; | |
2252 | } | |
2253 | ||
b203ca39 JP |
2254 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2255 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2256 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2257 | return; |
2258 | } | |
2259 | ||
2260 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2261 | /* Too short SA Query request frame */ | |
2262 | return; | |
2263 | } | |
2264 | ||
2265 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2266 | if (skb == NULL) | |
2267 | return; | |
2268 | ||
2269 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2270 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2271 | memset(resp, 0, 24); | |
2272 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2273 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2274 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2275 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2276 | IEEE80211_STYPE_ACTION); | |
2277 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2278 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2279 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2280 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2281 | mgmt->u.action.u.sa_query.trans_id, | |
2282 | WLAN_SA_QUERY_TR_ID_LEN); | |
2283 | ||
62ae67be | 2284 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2285 | } |
2286 | ||
2e161f78 JB |
2287 | static ieee80211_rx_result debug_noinline |
2288 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2289 | { | |
2290 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2291 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2292 | |
2293 | /* | |
2294 | * From here on, look only at management frames. | |
2295 | * Data and control frames are already handled, | |
2296 | * and unknown (reserved) frames are useless. | |
2297 | */ | |
2298 | if (rx->skb->len < 24) | |
2299 | return RX_DROP_MONITOR; | |
2300 | ||
2301 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2302 | return RX_DROP_MONITOR; | |
2303 | ||
ee971924 JB |
2304 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2305 | ieee80211_is_beacon(mgmt->frame_control) && | |
2306 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2307 | int sig = 0; |
2308 | ||
2309 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2310 | sig = status->signal; | |
2311 | ||
ee971924 JB |
2312 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2313 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2314 | status->freq, sig); |
ee971924 JB |
2315 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2316 | } | |
2317 | ||
554891e6 | 2318 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2319 | return RX_DROP_MONITOR; |
2320 | ||
2321 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2322 | return RX_DROP_UNUSABLE; | |
2323 | ||
2324 | return RX_CONTINUE; | |
2325 | } | |
2326 | ||
de1ede7a JB |
2327 | static ieee80211_rx_result debug_noinline |
2328 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2329 | { | |
2330 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2331 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2332 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2333 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2334 | int len = rx->skb->len; |
2335 | ||
2336 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2337 | return RX_CONTINUE; | |
2338 | ||
026331c4 JM |
2339 | /* drop too small frames */ |
2340 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2341 | return RX_DROP_UNUSABLE; |
de1ede7a | 2342 | |
815b8092 MP |
2343 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
2344 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED) | |
84040805 | 2345 | return RX_DROP_UNUSABLE; |
de1ede7a | 2346 | |
554891e6 | 2347 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2348 | return RX_DROP_UNUSABLE; |
97ebe12a | 2349 | |
de1ede7a | 2350 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2351 | case WLAN_CATEGORY_HT: |
2352 | /* reject HT action frames from stations not supporting HT */ | |
2353 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2354 | goto invalid; | |
2355 | ||
2356 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2357 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2358 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2359 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2360 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2361 | break; | |
2362 | ||
ec61cd63 | 2363 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2364 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2365 | goto invalid; | |
2366 | ||
2367 | switch (mgmt->u.action.u.ht_smps.action) { | |
2368 | case WLAN_HT_ACTION_SMPS: { | |
2369 | struct ieee80211_supported_band *sband; | |
2370 | u8 smps; | |
2371 | ||
2372 | /* convert to HT capability */ | |
2373 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2374 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
2375 | smps = WLAN_HT_CAP_SM_PS_DISABLED; | |
2376 | break; | |
2377 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
2378 | smps = WLAN_HT_CAP_SM_PS_STATIC; | |
2379 | break; | |
2380 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
2381 | smps = WLAN_HT_CAP_SM_PS_DYNAMIC; | |
2382 | break; | |
2383 | default: | |
2384 | goto invalid; | |
2385 | } | |
2386 | smps <<= IEEE80211_HT_CAP_SM_PS_SHIFT; | |
2387 | ||
2388 | /* if no change do nothing */ | |
2389 | if ((rx->sta->sta.ht_cap.cap & | |
2390 | IEEE80211_HT_CAP_SM_PS) == smps) | |
2391 | goto handled; | |
2392 | ||
2393 | rx->sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SM_PS; | |
2394 | rx->sta->sta.ht_cap.cap |= smps; | |
2395 | ||
2396 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2397 | ||
64f68e5d JB |
2398 | rate_control_rate_update(local, sband, rx->sta, |
2399 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2400 | goto handled; |
2401 | } | |
ec61cd63 JB |
2402 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2403 | struct ieee80211_supported_band *sband; | |
2404 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
2405 | bool old_40mhz, new_40mhz; | |
2406 | ||
2407 | /* If it doesn't support 40 MHz it can't change ... */ | |
2408 | if (!rx->sta->supports_40mhz) | |
2409 | goto handled; | |
2410 | ||
2411 | old_40mhz = rx->sta->sta.ht_cap.cap & | |
2412 | IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2413 | new_40mhz = chanwidth == IEEE80211_HT_CHANWIDTH_ANY; | |
2414 | ||
2415 | if (old_40mhz == new_40mhz) | |
2416 | goto handled; | |
2417 | ||
2418 | if (new_40mhz) | |
2419 | rx->sta->sta.ht_cap.cap |= | |
2420 | IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2421 | else | |
2422 | rx->sta->sta.ht_cap.cap &= | |
2423 | ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2424 | ||
2425 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2426 | ||
2427 | rate_control_rate_update(local, sband, rx->sta, | |
2428 | IEEE80211_RC_BW_CHANGED); | |
2429 | goto handled; | |
2430 | } | |
1d8d3dec JB |
2431 | default: |
2432 | goto invalid; | |
2433 | } | |
2434 | ||
2435 | break; | |
de1ede7a | 2436 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2437 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2438 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2439 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2440 | sdata->vif.type != NL80211_IFTYPE_AP && |
2441 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2442 | break; |
8abd3f9b | 2443 | |
026331c4 JM |
2444 | /* verify action_code is present */ |
2445 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2446 | break; | |
2447 | ||
de1ede7a JB |
2448 | switch (mgmt->u.action.u.addba_req.action_code) { |
2449 | case WLAN_ACTION_ADDBA_REQ: | |
2450 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2451 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2452 | goto invalid; |
2453 | break; | |
de1ede7a JB |
2454 | case WLAN_ACTION_ADDBA_RESP: |
2455 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2456 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2457 | goto invalid; |
2458 | break; | |
de1ede7a JB |
2459 | case WLAN_ACTION_DELBA: |
2460 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2461 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2462 | goto invalid; |
2463 | break; | |
2464 | default: | |
2465 | goto invalid; | |
de1ede7a | 2466 | } |
bed7ee6e | 2467 | |
8b58ff83 | 2468 | goto queue; |
39192c0b | 2469 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
4797c7ba | 2470 | if (status->band != IEEE80211_BAND_5GHZ) |
84040805 | 2471 | break; |
46900298 JB |
2472 | |
2473 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2474 | break; |
46900298 | 2475 | |
026331c4 JM |
2476 | /* verify action_code is present */ |
2477 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2478 | break; | |
2479 | ||
39192c0b JB |
2480 | switch (mgmt->u.action.u.measurement.action_code) { |
2481 | case WLAN_ACTION_SPCT_MSR_REQ: | |
2482 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2483 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2484 | break; |
39192c0b | 2485 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2486 | goto handled; |
c481ec97 S |
2487 | case WLAN_ACTION_SPCT_CHL_SWITCH: |
2488 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2489 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2490 | break; |
c481ec97 | 2491 | |
cc32abd4 | 2492 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
84040805 | 2493 | break; |
cc32abd4 | 2494 | |
b203ca39 | 2495 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
84040805 | 2496 | break; |
c481ec97 | 2497 | |
8b58ff83 | 2498 | goto queue; |
39192c0b JB |
2499 | } |
2500 | break; | |
fea14732 JM |
2501 | case WLAN_CATEGORY_SA_QUERY: |
2502 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2503 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2504 | break; |
2505 | ||
fea14732 JM |
2506 | switch (mgmt->u.action.u.sa_query.action) { |
2507 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2508 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2509 | break; |
fea14732 | 2510 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2511 | goto handled; |
fea14732 JM |
2512 | } |
2513 | break; | |
8db09850 | 2514 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2515 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2516 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2517 | break; | |
2518 | ||
8db09850 TP |
2519 | switch (mgmt->u.action.u.self_prot.action_code) { |
2520 | case WLAN_SP_MESH_PEERING_OPEN: | |
2521 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2522 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2523 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2524 | goto invalid; | |
2525 | if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE) | |
2526 | /* userspace handles this frame */ | |
2527 | break; | |
2528 | goto queue; | |
2529 | case WLAN_SP_MGK_INFORM: | |
2530 | case WLAN_SP_MGK_ACK: | |
2531 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2532 | goto invalid; | |
2533 | break; | |
2534 | } | |
2535 | break; | |
d3aaec8a | 2536 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2537 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2538 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2539 | break; | |
2540 | ||
77a121c3 JB |
2541 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2542 | break; | |
25d49e4d | 2543 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2544 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2545 | break; |
2546 | goto queue; | |
84040805 | 2547 | } |
026331c4 | 2548 | |
2e161f78 JB |
2549 | return RX_CONTINUE; |
2550 | ||
bed7ee6e | 2551 | invalid: |
554891e6 | 2552 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2553 | /* will return in the next handlers */ |
2554 | return RX_CONTINUE; | |
2555 | ||
2556 | handled: | |
2557 | if (rx->sta) | |
2558 | rx->sta->rx_packets++; | |
2559 | dev_kfree_skb(rx->skb); | |
2560 | return RX_QUEUED; | |
2561 | ||
2562 | queue: | |
2563 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2564 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2565 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2566 | if (rx->sta) | |
2567 | rx->sta->rx_packets++; | |
2568 | return RX_QUEUED; | |
2569 | } | |
2570 | ||
2571 | static ieee80211_rx_result debug_noinline | |
2572 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2573 | { | |
554891e6 | 2574 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2575 | int sig = 0; |
2e161f78 JB |
2576 | |
2577 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2578 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2579 | return RX_CONTINUE; |
d7907448 | 2580 | |
026331c4 JM |
2581 | /* |
2582 | * Getting here means the kernel doesn't know how to handle | |
2583 | * it, but maybe userspace does ... include returned frames | |
2584 | * so userspace can register for those to know whether ones | |
2585 | * it transmitted were processed or returned. | |
2586 | */ | |
026331c4 | 2587 | |
804483e9 JB |
2588 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2589 | sig = status->signal; | |
2590 | ||
71bbc994 | 2591 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
2e161f78 JB |
2592 | rx->skb->data, rx->skb->len, |
2593 | GFP_ATOMIC)) { | |
2594 | if (rx->sta) | |
2595 | rx->sta->rx_packets++; | |
2596 | dev_kfree_skb(rx->skb); | |
2597 | return RX_QUEUED; | |
2598 | } | |
2599 | ||
2e161f78 JB |
2600 | return RX_CONTINUE; |
2601 | } | |
2602 | ||
2603 | static ieee80211_rx_result debug_noinline | |
2604 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2605 | { | |
2606 | struct ieee80211_local *local = rx->local; | |
2607 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2608 | struct sk_buff *nskb; | |
2609 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2610 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2611 | |
2612 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2613 | return RX_CONTINUE; | |
2614 | ||
2615 | /* | |
2616 | * For AP mode, hostapd is responsible for handling any action | |
2617 | * frames that we didn't handle, including returning unknown | |
2618 | * ones. For all other modes we will return them to the sender, | |
2619 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2620 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2621 | * Newer versions of hostapd shall also use the management frame |
2622 | * registration mechanisms, but older ones still use cooked | |
2623 | * monitor interfaces so push all frames there. | |
2624 | */ | |
554891e6 | 2625 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2626 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2627 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2628 | return RX_DROP_MONITOR; | |
026331c4 | 2629 | |
4b5ebccc JB |
2630 | if (is_multicast_ether_addr(mgmt->da)) |
2631 | return RX_DROP_MONITOR; | |
2632 | ||
84040805 JB |
2633 | /* do not return rejected action frames */ |
2634 | if (mgmt->u.action.category & 0x80) | |
2635 | return RX_DROP_UNUSABLE; | |
2636 | ||
2637 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2638 | GFP_ATOMIC); | |
2639 | if (nskb) { | |
292b4df6 | 2640 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2641 | |
292b4df6 JL |
2642 | nmgmt->u.action.category |= 0x80; |
2643 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2644 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2645 | |
2646 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2647 | ||
2648 | ieee80211_tx_skb(rx->sdata, nskb); | |
de1ede7a | 2649 | } |
39192c0b JB |
2650 | dev_kfree_skb(rx->skb); |
2651 | return RX_QUEUED; | |
de1ede7a JB |
2652 | } |
2653 | ||
49461622 | 2654 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2655 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2656 | { |
eb9fb5b8 | 2657 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2658 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2659 | __le16 stype; | |
571ecf67 | 2660 | |
77a121c3 | 2661 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2662 | |
77a121c3 JB |
2663 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2664 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2665 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2666 | return RX_DROP_MONITOR; | |
472dbc45 | 2667 | |
77a121c3 | 2668 | switch (stype) { |
66e67e41 | 2669 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2670 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2671 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2672 | /* process for all: mesh, mlme, ibss */ | |
2673 | break; | |
66e67e41 JB |
2674 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2675 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2676 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2677 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2678 | if (is_multicast_ether_addr(mgmt->da) && |
2679 | !is_broadcast_ether_addr(mgmt->da)) | |
2680 | return RX_DROP_MONITOR; | |
2681 | ||
77a121c3 JB |
2682 | /* process only for station */ |
2683 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2684 | return RX_DROP_MONITOR; | |
2685 | break; | |
2686 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
77a121c3 JB |
2687 | /* process only for ibss */ |
2688 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2689 | return RX_DROP_MONITOR; | |
2690 | break; | |
2691 | default: | |
2692 | return RX_DROP_MONITOR; | |
2693 | } | |
f9d540ee | 2694 | |
77a121c3 | 2695 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2696 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2697 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2698 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2699 | if (rx->sta) |
2700 | rx->sta->rx_packets++; | |
46900298 | 2701 | |
77a121c3 | 2702 | return RX_QUEUED; |
571ecf67 JB |
2703 | } |
2704 | ||
5cf121c3 | 2705 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2706 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2707 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2708 | { |
2709 | struct ieee80211_sub_if_data *sdata; | |
2710 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2711 | struct sk_buff *skb = rx->skb, *skb2; |
2712 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2713 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2714 | int needed_headroom; |
3d30d949 | 2715 | |
554891e6 JB |
2716 | /* |
2717 | * If cooked monitor has been processed already, then | |
2718 | * don't do it again. If not, set the flag. | |
2719 | */ | |
2720 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2721 | goto out_free_skb; |
554891e6 | 2722 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2723 | |
152c477a JB |
2724 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2725 | if (!local->cooked_mntrs) | |
2726 | goto out_free_skb; | |
2727 | ||
293702a3 | 2728 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2729 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2730 | |
293702a3 JB |
2731 | if (skb_headroom(skb) < needed_headroom && |
2732 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2733 | goto out_free_skb; | |
3d30d949 | 2734 | |
293702a3 | 2735 | /* prepend radiotap information */ |
973ef21a FF |
2736 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2737 | false); | |
3d30d949 MW |
2738 | |
2739 | skb_set_mac_header(skb, 0); | |
2740 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2741 | skb->pkt_type = PACKET_OTHERHOST; | |
2742 | skb->protocol = htons(ETH_P_802_2); | |
2743 | ||
2744 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2745 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2746 | continue; |
2747 | ||
05c914fe | 2748 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2749 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2750 | continue; | |
2751 | ||
2752 | if (prev_dev) { | |
2753 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2754 | if (skb2) { | |
2755 | skb2->dev = prev_dev; | |
5548a8a1 | 2756 | netif_receive_skb(skb2); |
3d30d949 MW |
2757 | } |
2758 | } | |
2759 | ||
2760 | prev_dev = sdata->dev; | |
2761 | sdata->dev->stats.rx_packets++; | |
2762 | sdata->dev->stats.rx_bytes += skb->len; | |
2763 | } | |
2764 | ||
2765 | if (prev_dev) { | |
2766 | skb->dev = prev_dev; | |
5548a8a1 | 2767 | netif_receive_skb(skb); |
554891e6 JB |
2768 | return; |
2769 | } | |
3d30d949 MW |
2770 | |
2771 | out_free_skb: | |
2772 | dev_kfree_skb(skb); | |
2773 | } | |
2774 | ||
aa0c8636 CL |
2775 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2776 | ieee80211_rx_result res) | |
2777 | { | |
2778 | switch (res) { | |
2779 | case RX_DROP_MONITOR: | |
2780 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2781 | if (rx->sta) | |
2782 | rx->sta->rx_dropped++; | |
2783 | /* fall through */ | |
2784 | case RX_CONTINUE: { | |
2785 | struct ieee80211_rate *rate = NULL; | |
2786 | struct ieee80211_supported_band *sband; | |
2787 | struct ieee80211_rx_status *status; | |
2788 | ||
2789 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2790 | ||
2791 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2792 | if (!(status->flag & RX_FLAG_HT) && |
2793 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2794 | rate = &sband->bitrates[status->rate_idx]; |
2795 | ||
2796 | ieee80211_rx_cooked_monitor(rx, rate); | |
2797 | break; | |
2798 | } | |
2799 | case RX_DROP_UNUSABLE: | |
2800 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2801 | if (rx->sta) | |
2802 | rx->sta->rx_dropped++; | |
2803 | dev_kfree_skb(rx->skb); | |
2804 | break; | |
2805 | case RX_QUEUED: | |
2806 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2807 | break; | |
2808 | } | |
2809 | } | |
571ecf67 | 2810 | |
24a8fdad | 2811 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx) |
58905290 | 2812 | { |
58905290 | 2813 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2814 | struct sk_buff *skb; |
8944b79f | 2815 | |
e32f85f7 LCC |
2816 | #define CALL_RXH(rxh) \ |
2817 | do { \ | |
2818 | res = rxh(rx); \ | |
2819 | if (res != RX_CONTINUE) \ | |
2569a826 | 2820 | goto rxh_next; \ |
e32f85f7 | 2821 | } while (0); |
49461622 | 2822 | |
24a8fdad CL |
2823 | spin_lock(&rx->local->rx_skb_queue.lock); |
2824 | if (rx->local->running_rx_handler) | |
2825 | goto unlock; | |
2826 | ||
2827 | rx->local->running_rx_handler = true; | |
2828 | ||
2829 | while ((skb = __skb_dequeue(&rx->local->rx_skb_queue))) { | |
2830 | spin_unlock(&rx->local->rx_skb_queue.lock); | |
2831 | ||
2569a826 JB |
2832 | /* |
2833 | * all the other fields are valid across frames | |
2834 | * that belong to an aMPDU since they are on the | |
2835 | * same TID from the same station | |
2836 | */ | |
2837 | rx->skb = skb; | |
2838 | ||
2839 | CALL_RXH(ieee80211_rx_h_decrypt) | |
2840 | CALL_RXH(ieee80211_rx_h_check_more_data) | |
47086fc5 | 2841 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 JB |
2842 | CALL_RXH(ieee80211_rx_h_sta_process) |
2843 | CALL_RXH(ieee80211_rx_h_defragment) | |
2569a826 JB |
2844 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2845 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2846 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2847 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2848 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2849 | #endif |
2154c81c | 2850 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2851 | CALL_RXH(ieee80211_rx_h_data) |
24a8fdad | 2852 | CALL_RXH(ieee80211_rx_h_ctrl); |
2e161f78 | 2853 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 2854 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
2855 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
2856 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 2857 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 2858 | |
aa0c8636 CL |
2859 | rxh_next: |
2860 | ieee80211_rx_handlers_result(rx, res); | |
24a8fdad | 2861 | spin_lock(&rx->local->rx_skb_queue.lock); |
49461622 | 2862 | #undef CALL_RXH |
aa0c8636 | 2863 | } |
24a8fdad CL |
2864 | |
2865 | rx->local->running_rx_handler = false; | |
2866 | ||
2867 | unlock: | |
2868 | spin_unlock(&rx->local->rx_skb_queue.lock); | |
aa0c8636 CL |
2869 | } |
2870 | ||
4406c376 | 2871 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 2872 | { |
aa0c8636 CL |
2873 | ieee80211_rx_result res = RX_DROP_MONITOR; |
2874 | ||
aa0c8636 CL |
2875 | #define CALL_RXH(rxh) \ |
2876 | do { \ | |
2877 | res = rxh(rx); \ | |
2878 | if (res != RX_CONTINUE) \ | |
2879 | goto rxh_next; \ | |
2880 | } while (0); | |
2881 | ||
aa0c8636 CL |
2882 | CALL_RXH(ieee80211_rx_h_check) |
2883 | ||
24a8fdad | 2884 | ieee80211_rx_reorder_ampdu(rx); |
aa0c8636 | 2885 | |
24a8fdad | 2886 | ieee80211_rx_handlers(rx); |
aa0c8636 | 2887 | return; |
49461622 | 2888 | |
2569a826 | 2889 | rxh_next: |
aa0c8636 CL |
2890 | ieee80211_rx_handlers_result(rx, res); |
2891 | ||
2892 | #undef CALL_RXH | |
58905290 JB |
2893 | } |
2894 | ||
2bff8ebf | 2895 | /* |
dd318575 JB |
2896 | * This function makes calls into the RX path, therefore |
2897 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
2898 | */ |
2899 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
2900 | { | |
554891e6 JB |
2901 | struct ieee80211_rx_data rx = { |
2902 | .sta = sta, | |
2903 | .sdata = sta->sdata, | |
2904 | .local = sta->local, | |
9e26297a JB |
2905 | /* This is OK -- must be QoS data frame */ |
2906 | .security_idx = tid, | |
2907 | .seqno_idx = tid, | |
fcf8bd3b | 2908 | .flags = 0, |
554891e6 | 2909 | }; |
2c15a0cf CL |
2910 | struct tid_ampdu_rx *tid_agg_rx; |
2911 | ||
2912 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
2913 | if (!tid_agg_rx) | |
2914 | return; | |
2bff8ebf | 2915 | |
2c15a0cf | 2916 | spin_lock(&tid_agg_rx->reorder_lock); |
d3b2fb53 | 2917 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx); |
2c15a0cf | 2918 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 2919 | |
24a8fdad | 2920 | ieee80211_rx_handlers(&rx); |
2bff8ebf CL |
2921 | } |
2922 | ||
571ecf67 JB |
2923 | /* main receive path */ |
2924 | ||
20b01f80 | 2925 | static int prepare_for_handlers(struct ieee80211_rx_data *rx, |
23a24def JB |
2926 | struct ieee80211_hdr *hdr) |
2927 | { | |
20b01f80 | 2928 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
2929 | struct sk_buff *skb = rx->skb; |
2930 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
2931 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
2932 | int multicast = is_multicast_ether_addr(hdr->addr1); |
2933 | ||
51fb61e7 | 2934 | switch (sdata->vif.type) { |
05c914fe | 2935 | case NL80211_IFTYPE_STATION: |
9bc383de | 2936 | if (!bssid && !sdata->u.mgd.use_4addr) |
23a24def | 2937 | return 0; |
77fdaa12 | 2938 | if (!multicast && |
b203ca39 | 2939 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
2940 | if (!(sdata->dev->flags & IFF_PROMISC) || |
2941 | sdata->u.mgd.use_4addr) | |
23a24def | 2942 | return 0; |
554891e6 | 2943 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
2944 | } |
2945 | break; | |
05c914fe | 2946 | case NL80211_IFTYPE_ADHOC: |
23a24def JB |
2947 | if (!bssid) |
2948 | return 0; | |
a7767f95 | 2949 | if (ieee80211_is_beacon(hdr->frame_control)) { |
9d9bf77d | 2950 | return 1; |
d48b2968 JB |
2951 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
2952 | return 0; | |
23a24def | 2953 | } else if (!multicast && |
b203ca39 | 2954 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 2955 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 2956 | return 0; |
554891e6 | 2957 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
2958 | } else if (!rx->sta) { |
2959 | int rate_idx; | |
5614618e JB |
2960 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
2961 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 2962 | else |
eb9fb5b8 | 2963 | rate_idx = status->rate_idx; |
8bf11d8d JB |
2964 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
2965 | BIT(rate_idx)); | |
0fb8ca45 | 2966 | } |
23a24def | 2967 | break; |
05c914fe | 2968 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 2969 | if (!multicast && |
b203ca39 | 2970 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 JB |
2971 | if (!(sdata->dev->flags & IFF_PROMISC)) |
2972 | return 0; | |
2973 | ||
554891e6 | 2974 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
2975 | } |
2976 | break; | |
05c914fe JB |
2977 | case NL80211_IFTYPE_AP_VLAN: |
2978 | case NL80211_IFTYPE_AP: | |
23a24def | 2979 | if (!bssid) { |
b203ca39 | 2980 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
23a24def | 2981 | return 0; |
f142c6b9 | 2982 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
2983 | /* |
2984 | * Accept public action frames even when the | |
2985 | * BSSID doesn't match, this is used for P2P | |
2986 | * and location updates. Note that mac80211 | |
2987 | * itself never looks at these frames. | |
2988 | */ | |
d48b2968 | 2989 | if (ieee80211_is_public_action(hdr, skb->len)) |
3df6eaea | 2990 | return 1; |
d48b2968 | 2991 | if (!ieee80211_is_beacon(hdr->frame_control)) |
23a24def | 2992 | return 0; |
554891e6 | 2993 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 2994 | } |
23a24def | 2995 | break; |
05c914fe | 2996 | case NL80211_IFTYPE_WDS: |
a7767f95 | 2997 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
23a24def | 2998 | return 0; |
b203ca39 | 2999 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
23a24def JB |
3000 | return 0; |
3001 | break; | |
f142c6b9 JB |
3002 | case NL80211_IFTYPE_P2P_DEVICE: |
3003 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3004 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3005 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3006 | !ieee80211_is_beacon(hdr->frame_control)) | |
3007 | return 0; | |
3008 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3009 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; | |
3010 | break; | |
2ca27bcf | 3011 | default: |
fb1c1cd6 | 3012 | /* should never get here */ |
f142c6b9 | 3013 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3014 | break; |
23a24def JB |
3015 | } |
3016 | ||
3017 | return 1; | |
3018 | } | |
3019 | ||
4406c376 JB |
3020 | /* |
3021 | * This function returns whether or not the SKB | |
3022 | * was destined for RX processing or not, which, | |
3023 | * if consume is true, is equivalent to whether | |
3024 | * or not the skb was consumed. | |
3025 | */ | |
3026 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3027 | struct sk_buff *skb, bool consume) | |
3028 | { | |
3029 | struct ieee80211_local *local = rx->local; | |
3030 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3031 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3032 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3033 | int prepares; | |
3034 | ||
3035 | rx->skb = skb; | |
554891e6 | 3036 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 JB |
3037 | prepares = prepare_for_handlers(rx, hdr); |
3038 | ||
3039 | if (!prepares) | |
3040 | return false; | |
3041 | ||
4406c376 JB |
3042 | if (!consume) { |
3043 | skb = skb_copy(skb, GFP_ATOMIC); | |
3044 | if (!skb) { | |
3045 | if (net_ratelimit()) | |
3046 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3047 | "failed to copy skb for %s\n", |
4406c376 JB |
3048 | sdata->name); |
3049 | return true; | |
3050 | } | |
3051 | ||
3052 | rx->skb = skb; | |
3053 | } | |
3054 | ||
3055 | ieee80211_invoke_rx_handlers(rx); | |
3056 | return true; | |
3057 | } | |
3058 | ||
571ecf67 | 3059 | /* |
6368e4b1 RR |
3060 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
3061 | * be called with rcu_read_lock protection. | |
571ecf67 | 3062 | */ |
71ebb4aa | 3063 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3064 | struct sk_buff *skb) |
571ecf67 JB |
3065 | { |
3066 | struct ieee80211_local *local = hw_to_local(hw); | |
3067 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3068 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3069 | __le16 fc; |
5cf121c3 | 3070 | struct ieee80211_rx_data rx; |
4406c376 | 3071 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3072 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3073 | int err = 0; |
571ecf67 | 3074 | |
e3cf8b3f | 3075 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3076 | memset(&rx, 0, sizeof(rx)); |
3077 | rx.skb = skb; | |
3078 | rx.local = local; | |
72abd81b | 3079 | |
e3cf8b3f | 3080 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3081 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3082 | |
4a4f1a58 JB |
3083 | if (ieee80211_is_mgmt(fc)) { |
3084 | /* drop frame if too short for header */ | |
3085 | if (skb->len < ieee80211_hdrlen(fc)) | |
3086 | err = -ENOBUFS; | |
3087 | else | |
3088 | err = skb_linearize(skb); | |
3089 | } else { | |
e3cf8b3f | 3090 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3091 | } |
e3cf8b3f ZY |
3092 | |
3093 | if (err) { | |
3094 | dev_kfree_skb(skb); | |
3095 | return; | |
3096 | } | |
3097 | ||
3098 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3099 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3100 | ieee80211_verify_alignment(&rx); |
38f3714d | 3101 | |
d48b2968 JB |
3102 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3103 | ieee80211_is_beacon(hdr->frame_control))) | |
3104 | ieee80211_scan_rx(local, skb); | |
3105 | ||
e3cf8b3f | 3106 | if (ieee80211_is_data(fc)) { |
56af3268 | 3107 | prev_sta = NULL; |
4406c376 | 3108 | |
7852e361 | 3109 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3110 | if (!prev_sta) { |
3111 | prev_sta = sta; | |
3112 | continue; | |
3113 | } | |
3114 | ||
3115 | rx.sta = prev_sta; | |
3116 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3117 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3118 | |
56af3268 | 3119 | prev_sta = sta; |
4406c376 | 3120 | } |
56af3268 BG |
3121 | |
3122 | if (prev_sta) { | |
3123 | rx.sta = prev_sta; | |
3124 | rx.sdata = prev_sta->sdata; | |
3125 | ||
4406c376 | 3126 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3127 | return; |
8e26d5ad | 3128 | goto out; |
56af3268 | 3129 | } |
4406c376 JB |
3130 | } |
3131 | ||
4b0dd98e | 3132 | prev = NULL; |
b2e7771e | 3133 | |
4b0dd98e JB |
3134 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3135 | if (!ieee80211_sdata_running(sdata)) | |
3136 | continue; | |
340e11f3 | 3137 | |
4b0dd98e JB |
3138 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3139 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3140 | continue; | |
340e11f3 | 3141 | |
4b0dd98e JB |
3142 | /* |
3143 | * frame is destined for this interface, but if it's | |
3144 | * not also for the previous one we handle that after | |
3145 | * the loop to avoid copying the SKB once too much | |
3146 | */ | |
4bb29f8c | 3147 | |
4b0dd98e | 3148 | if (!prev) { |
abe60632 | 3149 | prev = sdata; |
4b0dd98e | 3150 | continue; |
340e11f3 | 3151 | } |
4bb29f8c | 3152 | |
7852e361 | 3153 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3154 | rx.sdata = prev; |
3155 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3156 | |
4b0dd98e JB |
3157 | prev = sdata; |
3158 | } | |
3159 | ||
3160 | if (prev) { | |
7852e361 | 3161 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3162 | rx.sdata = prev; |
4406c376 | 3163 | |
4b0dd98e JB |
3164 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3165 | return; | |
571ecf67 | 3166 | } |
4406c376 | 3167 | |
8e26d5ad | 3168 | out: |
4406c376 | 3169 | dev_kfree_skb(skb); |
571ecf67 | 3170 | } |
6368e4b1 RR |
3171 | |
3172 | /* | |
3173 | * This is the receive path handler. It is called by a low level driver when an | |
3174 | * 802.11 MPDU is received from the hardware. | |
3175 | */ | |
103bf9f7 | 3176 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3177 | { |
3178 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3179 | struct ieee80211_rate *rate = NULL; |
3180 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3181 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3182 | |
d20ef63d JB |
3183 | WARN_ON_ONCE(softirq_count() == 0); |
3184 | ||
444e3803 | 3185 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3186 | goto drop; |
8318d78a JB |
3187 | |
3188 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3189 | if (WARN_ON(!sband)) |
3190 | goto drop; | |
8318d78a | 3191 | |
89c3a8ac JB |
3192 | /* |
3193 | * If we're suspending, it is possible although not too likely | |
3194 | * that we'd be receiving frames after having already partially | |
3195 | * quiesced the stack. We can't process such frames then since | |
3196 | * that might, for example, cause stations to be added or other | |
3197 | * driver callbacks be invoked. | |
3198 | */ | |
77a980dc JB |
3199 | if (unlikely(local->quiescing || local->suspended)) |
3200 | goto drop; | |
89c3a8ac | 3201 | |
04800ada AN |
3202 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3203 | if (unlikely(local->in_reconfig)) | |
3204 | goto drop; | |
3205 | ||
ea77f12f JB |
3206 | /* |
3207 | * The same happens when we're not even started, | |
3208 | * but that's worth a warning. | |
3209 | */ | |
77a980dc JB |
3210 | if (WARN_ON(!local->started)) |
3211 | goto drop; | |
ea77f12f | 3212 | |
fc885189 | 3213 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3214 | /* |
fc885189 JB |
3215 | * Validate the rate, unless a PLCP error means that |
3216 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3217 | */ |
fc885189 JB |
3218 | |
3219 | if (status->flag & RX_FLAG_HT) { | |
3220 | /* | |
3221 | * rate_idx is MCS index, which can be [0-76] | |
3222 | * as documented on: | |
3223 | * | |
3224 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3225 | * | |
3226 | * Anything else would be some sort of driver or | |
3227 | * hardware error. The driver should catch hardware | |
3228 | * errors. | |
3229 | */ | |
444e3803 | 3230 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3231 | "Rate marked as an HT rate but passed " |
3232 | "status->rate_idx is not " | |
3233 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3234 | status->rate_idx, | |
3235 | status->rate_idx)) | |
3236 | goto drop; | |
5614618e JB |
3237 | } else if (status->flag & RX_FLAG_VHT) { |
3238 | if (WARN_ONCE(status->rate_idx > 9 || | |
3239 | !status->vht_nss || | |
3240 | status->vht_nss > 8, | |
3241 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3242 | status->rate_idx, status->vht_nss)) | |
3243 | goto drop; | |
fc885189 | 3244 | } else { |
444e3803 | 3245 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3246 | goto drop; |
3247 | rate = &sband->bitrates[status->rate_idx]; | |
3248 | } | |
0fb8ca45 | 3249 | } |
6368e4b1 | 3250 | |
554891e6 JB |
3251 | status->rx_flags = 0; |
3252 | ||
6368e4b1 RR |
3253 | /* |
3254 | * key references and virtual interfaces are protected using RCU | |
3255 | * and this requires that we are in a read-side RCU section during | |
3256 | * receive processing | |
3257 | */ | |
3258 | rcu_read_lock(); | |
3259 | ||
3260 | /* | |
3261 | * Frames with failed FCS/PLCP checksum are not returned, | |
3262 | * all other frames are returned without radiotap header | |
3263 | * if it was previously present. | |
3264 | * Also, frames with less than 16 bytes are dropped. | |
3265 | */ | |
f1d58c25 | 3266 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3267 | if (!skb) { |
3268 | rcu_read_unlock(); | |
3269 | return; | |
3270 | } | |
3271 | ||
e1e54068 JB |
3272 | ieee80211_tpt_led_trig_rx(local, |
3273 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3274 | skb->len); | |
071d9ac2 | 3275 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3276 | |
3277 | rcu_read_unlock(); | |
77a980dc JB |
3278 | |
3279 | return; | |
3280 | drop: | |
3281 | kfree_skb(skb); | |
6368e4b1 | 3282 | } |
103bf9f7 | 3283 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3284 | |
3285 | /* This is a version of the rx handler that can be called from hard irq | |
3286 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3287 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3288 | { |
3289 | struct ieee80211_local *local = hw_to_local(hw); | |
3290 | ||
3291 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3292 | ||
571ecf67 JB |
3293 | skb->pkt_type = IEEE80211_RX_MSG; |
3294 | skb_queue_tail(&local->skb_queue, skb); | |
3295 | tasklet_schedule(&local->tasklet); | |
3296 | } | |
3297 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |