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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 | { |
b2e7771e JB |
43 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
44 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 45 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
46 | else { |
47 | /* driver bug */ | |
48 | WARN_ON(1); | |
49 | dev_kfree_skb(skb); | |
0624760c | 50 | return NULL; |
b2e7771e JB |
51 | } |
52 | } | |
53 | ||
54 | return skb; | |
55 | } | |
56 | ||
6b59db7d | 57 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 58 | { |
f1d58c25 | 59 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
6b59db7d | 60 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2e7771e | 61 | |
4c298677 JB |
62 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
63 | RX_FLAG_FAILED_PLCP_CRC | | |
64 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
6b59db7d ZG |
65 | return true; |
66 | ||
0059b2b1 | 67 | if (unlikely(skb->len < 16 + present_fcs_len)) |
6b59db7d ZG |
68 | return true; |
69 | ||
87228f57 HH |
70 | if (ieee80211_is_ctl(hdr->frame_control) && |
71 | !ieee80211_is_pspoll(hdr->frame_control) && | |
72 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
73 | return true; |
74 | ||
75 | return false; | |
b2e7771e JB |
76 | } |
77 | ||
601ae7f2 | 78 | static int |
90b9e446 JB |
79 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
80 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
81 | { |
82 | int len; | |
83 | ||
84 | /* always present fields */ | |
a144f378 | 85 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 86 | |
a144f378 | 87 | /* allocate extra bitmaps */ |
a144f378 JB |
88 | if (status->chains) |
89 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
90 | |
91 | if (ieee80211_have_rx_timestamp(status)) { | |
92 | len = ALIGN(len, 8); | |
601ae7f2 | 93 | len += 8; |
90b9e446 | 94 | } |
7fee5372 | 95 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 96 | len += 1; |
601ae7f2 | 97 | |
a144f378 JB |
98 | /* antenna field, if we don't have per-chain info */ |
99 | if (!status->chains) | |
100 | len += 1; | |
101 | ||
90b9e446 JB |
102 | /* padding for RX_FLAGS if necessary */ |
103 | len = ALIGN(len, 2); | |
601ae7f2 | 104 | |
6d744bac JB |
105 | if (status->flag & RX_FLAG_HT) /* HT info */ |
106 | len += 3; | |
107 | ||
4c298677 | 108 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 109 | len = ALIGN(len, 4); |
4c298677 JB |
110 | len += 8; |
111 | } | |
112 | ||
51648921 JB |
113 | if (status->flag & RX_FLAG_VHT) { |
114 | len = ALIGN(len, 2); | |
115 | len += 12; | |
116 | } | |
117 | ||
a144f378 JB |
118 | if (status->chains) { |
119 | /* antenna and antenna signal fields */ | |
120 | len += 2 * hweight8(status->chains); | |
121 | } | |
122 | ||
601ae7f2 BR |
123 | return len; |
124 | } | |
125 | ||
00ea6deb | 126 | /* |
601ae7f2 BR |
127 | * ieee80211_add_rx_radiotap_header - add radiotap header |
128 | * | |
129 | * add a radiotap header containing all the fields which the hardware provided. | |
130 | */ | |
131 | static void | |
132 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
133 | struct sk_buff *skb, | |
601ae7f2 | 134 | struct ieee80211_rate *rate, |
973ef21a | 135 | int rtap_len, bool has_fcs) |
601ae7f2 | 136 | { |
f1d58c25 | 137 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
138 | struct ieee80211_radiotap_header *rthdr; |
139 | unsigned char *pos; | |
a144f378 JB |
140 | __le32 *it_present; |
141 | u32 it_present_val; | |
6a86b9c7 | 142 | u16 rx_flags = 0; |
a5e70697 | 143 | u16 channel_flags = 0; |
a144f378 JB |
144 | int mpdulen, chain; |
145 | unsigned long chains = status->chains; | |
f4bda337 TP |
146 | |
147 | mpdulen = skb->len; | |
148 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
149 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
150 | |
151 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
152 | memset(rthdr, 0, rtap_len); | |
a144f378 | 153 | it_present = &rthdr->it_present; |
601ae7f2 BR |
154 | |
155 | /* radiotap header, set always present flags */ | |
0059b2b1 | 156 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
157 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
158 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
159 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
160 | ||
161 | if (!status->chains) | |
162 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
163 | ||
164 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
165 | it_present_val |= | |
166 | BIT(IEEE80211_RADIOTAP_EXT) | | |
167 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
168 | put_unaligned_le32(it_present_val, it_present); | |
169 | it_present++; | |
170 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
171 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
172 | } | |
601ae7f2 | 173 | |
a144f378 JB |
174 | put_unaligned_le32(it_present_val, it_present); |
175 | ||
176 | pos = (void *)(it_present + 1); | |
177 | ||
601ae7f2 BR |
178 | /* the order of the following fields is important */ |
179 | ||
180 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 181 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
182 | /* padding */ |
183 | while ((pos - (u8 *)rthdr) & 7) | |
184 | *pos++ = 0; | |
f4bda337 TP |
185 | put_unaligned_le64( |
186 | ieee80211_calculate_rx_timestamp(local, status, | |
187 | mpdulen, 0), | |
188 | pos); | |
1df332e8 | 189 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
190 | pos += 8; |
191 | } | |
192 | ||
193 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 194 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 195 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
196 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
197 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
198 | if (status->flag & RX_FLAG_SHORTPRE) |
199 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
200 | pos++; |
201 | ||
202 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 203 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 204 | /* |
f8d1ccf1 | 205 | * Without rate information don't add it. If we have, |
38f37be2 | 206 | * MCS information is a separate field in radiotap, |
73b48099 JB |
207 | * added below. The byte here is needed as padding |
208 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
209 | */ |
210 | *pos = 0; | |
8d6f658e | 211 | } else { |
2103dec1 | 212 | int shift = 0; |
ebe6c7ba | 213 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
214 | if (status->flag & RX_FLAG_10MHZ) |
215 | shift = 1; | |
216 | else if (status->flag & RX_FLAG_5MHZ) | |
217 | shift = 2; | |
218 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 219 | } |
601ae7f2 BR |
220 | pos++; |
221 | ||
222 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 223 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 224 | pos += 2; |
a5e70697 SW |
225 | if (status->flag & RX_FLAG_10MHZ) |
226 | channel_flags |= IEEE80211_CHAN_HALF; | |
227 | else if (status->flag & RX_FLAG_5MHZ) | |
228 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
229 | ||
601ae7f2 | 230 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 231 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 232 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 233 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 234 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 235 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 236 | else if (rate) |
a5e70697 | 237 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 238 | else |
a5e70697 SW |
239 | channel_flags |= IEEE80211_CHAN_2GHZ; |
240 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
241 | pos += 2; |
242 | ||
243 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
244 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
245 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
246 | *pos = status->signal; |
247 | rthdr->it_present |= | |
248 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
249 | pos++; | |
250 | } | |
251 | ||
601ae7f2 BR |
252 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
253 | ||
a144f378 JB |
254 | if (!status->chains) { |
255 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
256 | *pos = status->antenna; | |
257 | pos++; | |
258 | } | |
601ae7f2 | 259 | |
601ae7f2 BR |
260 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
261 | ||
262 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
263 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 264 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 265 | *pos++ = 0; |
aae89831 | 266 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
267 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
268 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 269 | pos += 2; |
6d744bac JB |
270 | |
271 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
272 | unsigned int stbc; |
273 | ||
6d744bac | 274 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 275 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
276 | *pos = 0; |
277 | if (status->flag & RX_FLAG_SHORT_GI) | |
278 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
279 | if (status->flag & RX_FLAG_40MHZ) | |
280 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
281 | if (status->flag & RX_FLAG_HT_GF) |
282 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
283 | if (status->flag & RX_FLAG_LDPC) |
284 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
285 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
286 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
287 | pos++; |
288 | *pos++ = status->rate_idx; | |
289 | } | |
4c298677 JB |
290 | |
291 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
292 | u16 flags = 0; | |
293 | ||
294 | /* ensure 4 byte alignment */ | |
295 | while ((pos - (u8 *)rthdr) & 3) | |
296 | pos++; | |
297 | rthdr->it_present |= | |
298 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
299 | put_unaligned_le32(status->ampdu_reference, pos); | |
300 | pos += 4; | |
301 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
302 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
303 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
304 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
305 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
306 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
307 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
308 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
309 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
310 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
311 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
312 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
313 | put_unaligned_le16(flags, pos); | |
314 | pos += 2; | |
315 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
316 | *pos++ = status->ampdu_delimiter_crc; | |
317 | else | |
318 | *pos++ = 0; | |
319 | *pos++ = 0; | |
320 | } | |
90b9e446 | 321 | |
51648921 JB |
322 | if (status->flag & RX_FLAG_VHT) { |
323 | u16 known = local->hw.radiotap_vht_details; | |
324 | ||
325 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
326 | /* known field - how to handle 80+80? */ | |
1b8d242a | 327 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 JB |
328 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
329 | put_unaligned_le16(known, pos); | |
330 | pos += 2; | |
331 | /* flags */ | |
332 | if (status->flag & RX_FLAG_SHORT_GI) | |
333 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
334 | /* in VHT, STBC is binary */ |
335 | if (status->flag & RX_FLAG_STBC_MASK) | |
336 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
337 | if (status->vht_flag & RX_VHT_FLAG_BF) |
338 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
339 | pos++; |
340 | /* bandwidth */ | |
1b8d242a | 341 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 342 | *pos++ = 4; |
1b8d242a | 343 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 | 344 | *pos++ = 0; /* marked not known above */ |
1b8d242a | 345 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
346 | *pos++ = 11; |
347 | else if (status->flag & RX_FLAG_40MHZ) | |
348 | *pos++ = 1; | |
349 | else /* 20 MHz */ | |
350 | *pos++ = 0; | |
351 | /* MCS/NSS */ | |
352 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
353 | pos += 4; | |
354 | /* coding field */ | |
63c361f5 EG |
355 | if (status->flag & RX_FLAG_LDPC) |
356 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
357 | pos++; |
358 | /* group ID */ | |
359 | pos++; | |
360 | /* partial_aid */ | |
361 | pos += 2; | |
362 | } | |
363 | ||
a144f378 JB |
364 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
365 | *pos++ = status->chain_signal[chain]; | |
366 | *pos++ = chain; | |
367 | } | |
601ae7f2 BR |
368 | } |
369 | ||
b2e7771e JB |
370 | /* |
371 | * This function copies a received frame to all monitor interfaces and | |
372 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
373 | * radiotap header the driver might have added. | |
374 | */ | |
375 | static struct sk_buff * | |
376 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 377 | struct ieee80211_rate *rate) |
b2e7771e | 378 | { |
f1d58c25 | 379 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 380 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 381 | int needed_headroom; |
b2e7771e JB |
382 | struct sk_buff *skb, *skb2; |
383 | struct net_device *prev_dev = NULL; | |
384 | int present_fcs_len = 0; | |
b2e7771e JB |
385 | |
386 | /* | |
387 | * First, we may need to make a copy of the skb because | |
388 | * (1) we need to modify it for radiotap (if not present), and | |
389 | * (2) the other RX handlers will modify the skb we got. | |
390 | * | |
391 | * We don't need to, of course, if we aren't going to return | |
392 | * the SKB because it has a bad FCS/PLCP checksum. | |
393 | */ | |
0869aea0 | 394 | |
b2e7771e JB |
395 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
396 | present_fcs_len = FCS_LEN; | |
397 | ||
0059b2b1 EG |
398 | /* ensure hdr->frame_control is in skb head */ |
399 | if (!pskb_may_pull(origskb, 2)) { | |
e3cf8b3f ZY |
400 | dev_kfree_skb(origskb); |
401 | return NULL; | |
402 | } | |
403 | ||
b2e7771e | 404 | if (!local->monitors) { |
0869aea0 | 405 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
406 | dev_kfree_skb(origskb); |
407 | return NULL; | |
408 | } | |
409 | ||
0869aea0 | 410 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
411 | } |
412 | ||
751413ea HS |
413 | /* room for the radiotap header based on driver features */ |
414 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
415 | ||
0869aea0 | 416 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
417 | /* only need to expand headroom if necessary */ |
418 | skb = origskb; | |
419 | origskb = NULL; | |
420 | ||
421 | /* | |
422 | * This shouldn't trigger often because most devices have an | |
423 | * RX header they pull before we get here, and that should | |
424 | * be big enough for our radiotap information. We should | |
425 | * probably export the length to drivers so that we can have | |
426 | * them allocate enough headroom to start with. | |
427 | */ | |
428 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 429 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
430 | dev_kfree_skb(skb); |
431 | return NULL; | |
432 | } | |
433 | } else { | |
434 | /* | |
435 | * Need to make a copy and possibly remove radiotap header | |
436 | * and FCS from the original. | |
437 | */ | |
438 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
439 | ||
0869aea0 | 440 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
441 | |
442 | if (!skb) | |
443 | return origskb; | |
444 | } | |
445 | ||
0869aea0 | 446 | /* prepend radiotap information */ |
973ef21a FF |
447 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
448 | true); | |
b2e7771e | 449 | |
ce3edf6d | 450 | skb_reset_mac_header(skb); |
b2e7771e JB |
451 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
452 | skb->pkt_type = PACKET_OTHERHOST; | |
453 | skb->protocol = htons(ETH_P_802_2); | |
454 | ||
455 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 456 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
457 | continue; |
458 | ||
3d30d949 MW |
459 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
460 | continue; | |
461 | ||
9607e6b6 | 462 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
463 | continue; |
464 | ||
b2e7771e JB |
465 | if (prev_dev) { |
466 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
467 | if (skb2) { | |
468 | skb2->dev = prev_dev; | |
5548a8a1 | 469 | netif_receive_skb(skb2); |
b2e7771e JB |
470 | } |
471 | } | |
472 | ||
473 | prev_dev = sdata->dev; | |
474 | sdata->dev->stats.rx_packets++; | |
475 | sdata->dev->stats.rx_bytes += skb->len; | |
476 | } | |
477 | ||
478 | if (prev_dev) { | |
479 | skb->dev = prev_dev; | |
5548a8a1 | 480 | netif_receive_skb(skb); |
b2e7771e JB |
481 | } else |
482 | dev_kfree_skb(skb); | |
483 | ||
484 | return origskb; | |
485 | } | |
486 | ||
5cf121c3 | 487 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 488 | { |
238f74a2 | 489 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 490 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 491 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
492 | |
493 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
494 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
495 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 496 | /* frame has qos control */ |
238f74a2 | 497 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 498 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 499 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
500 | |
501 | seqno_idx = tid; | |
502 | security_idx = tid; | |
6e0d114d | 503 | } else { |
1411f9b5 JB |
504 | /* |
505 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
506 | * | |
507 | * Sequence numbers for management frames, QoS data | |
508 | * frames with a broadcast/multicast address in the | |
509 | * Address 1 field, and all non-QoS data frames sent | |
510 | * by QoS STAs are assigned using an additional single | |
511 | * modulo-4096 counter, [...] | |
512 | * | |
513 | * We also use that counter for non-QoS STAs. | |
514 | */ | |
5a306f58 | 515 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
516 | security_idx = 0; |
517 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 518 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 519 | tid = 0; |
6e0d114d | 520 | } |
52865dfd | 521 | |
9e26297a JB |
522 | rx->seqno_idx = seqno_idx; |
523 | rx->security_idx = security_idx; | |
6e0d114d JB |
524 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
525 | * For now, set skb->priority to 0 for other cases. */ | |
526 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 527 | } |
6e0d114d | 528 | |
d1c3a37c JB |
529 | /** |
530 | * DOC: Packet alignment | |
531 | * | |
532 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
533 | * to the stack. | |
534 | * | |
535 | * Additionally, should, if possible, align the payload data in a way that | |
536 | * guarantees that the contained IP header is aligned to a four-byte | |
537 | * boundary. In the case of regular frames, this simply means aligning the | |
538 | * payload to a four-byte boundary (because either the IP header is directly | |
539 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
540 | * in front of it). If the payload data is not properly aligned and the |
541 | * architecture doesn't support efficient unaligned operations, mac80211 | |
542 | * will align the data. | |
d1c3a37c JB |
543 | * |
544 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
545 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
546 | * push the IP header further back to a multiple of four again. Thankfully, the | |
547 | * specs were sane enough this time around to require padding each A-MSDU | |
548 | * subframe to a length that is a multiple of four. | |
549 | * | |
25985edc | 550 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
551 | * the payload is not supported, the driver is required to move the 802.11 |
552 | * header to be directly in front of the payload in that case. | |
553 | */ | |
554 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 555 | { |
59d9cb07 KV |
556 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
557 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
558 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 559 | #endif |
6e0d114d JB |
560 | } |
561 | ||
6368e4b1 | 562 | |
571ecf67 JB |
563 | /* rx handlers */ |
564 | ||
3cfcf6ac JM |
565 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
566 | { | |
567 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
568 | ||
d8ca16db | 569 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
570 | return 0; |
571 | ||
d8ca16db | 572 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
573 | } |
574 | ||
575 | ||
576 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
577 | { | |
578 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
579 | ||
d8ca16db | 580 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
581 | return 0; |
582 | ||
d8ca16db | 583 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
584 | } |
585 | ||
586 | ||
587 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
588 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
589 | { | |
590 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
591 | struct ieee80211_mmie *mmie; | |
592 | ||
1df332e8 | 593 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
594 | return -1; |
595 | ||
d8ca16db | 596 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
597 | return -1; /* not a robust management frame */ |
598 | ||
599 | mmie = (struct ieee80211_mmie *) | |
600 | (skb->data + skb->len - sizeof(*mmie)); | |
601 | if (mmie->element_id != WLAN_EID_MMIE || | |
602 | mmie->length != sizeof(*mmie) - 2) | |
603 | return -1; | |
604 | ||
605 | return le16_to_cpu(mmie->key_id); | |
606 | } | |
607 | ||
2475b1cc MS |
608 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
609 | struct sk_buff *skb) | |
610 | { | |
611 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
612 | __le16 fc; | |
613 | int hdrlen; | |
614 | u8 keyid; | |
615 | ||
616 | fc = hdr->frame_control; | |
617 | hdrlen = ieee80211_hdrlen(fc); | |
618 | ||
619 | if (skb->len < hdrlen + cs->hdr_len) | |
620 | return -EINVAL; | |
621 | ||
622 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
623 | keyid &= cs->key_idx_mask; | |
624 | keyid >>= cs->key_idx_shift; | |
625 | ||
626 | return keyid; | |
627 | } | |
628 | ||
1df332e8 | 629 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 630 | { |
a7767f95 | 631 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 632 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 633 | |
a7767f95 | 634 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
635 | if (is_multicast_ether_addr(hdr->addr1)) { |
636 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 637 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 638 | return RX_DROP_MONITOR; |
b203ca39 | 639 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
640 | return RX_DROP_MONITOR; |
641 | } else { | |
642 | if (!ieee80211_has_a4(hdr->frame_control)) | |
643 | return RX_DROP_MONITOR; | |
b203ca39 | 644 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
645 | return RX_DROP_MONITOR; |
646 | } | |
33b64eb2 LCC |
647 | } |
648 | ||
649 | /* If there is not an established peer link and this is not a peer link | |
650 | * establisment frame, beacon or probe, drop the frame. | |
651 | */ | |
652 | ||
57cf8043 | 653 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 654 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 655 | |
a7767f95 | 656 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
657 | return RX_DROP_MONITOR; |
658 | ||
a7767f95 | 659 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 660 | u8 category; |
9b395bc3 JB |
661 | |
662 | /* make sure category field is present */ | |
663 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
664 | return RX_DROP_MONITOR; | |
665 | ||
33b64eb2 | 666 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
667 | category = mgmt->u.action.category; |
668 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 669 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 670 | return RX_DROP_MONITOR; |
33b64eb2 | 671 | return RX_CONTINUE; |
33b64eb2 LCC |
672 | } |
673 | ||
a7767f95 HH |
674 | if (ieee80211_is_probe_req(hdr->frame_control) || |
675 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
676 | ieee80211_is_beacon(hdr->frame_control) || |
677 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
678 | return RX_CONTINUE; |
679 | ||
680 | return RX_DROP_MONITOR; | |
a7767f95 HH |
681 | } |
682 | ||
902acc78 JB |
683 | return RX_CONTINUE; |
684 | } | |
33b64eb2 | 685 | |
d3b2fb53 | 686 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 687 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
688 | int index, |
689 | struct sk_buff_head *frames) | |
1edfb1af | 690 | { |
1edfb1af | 691 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 692 | struct ieee80211_rx_status *status; |
1edfb1af | 693 | |
dd318575 JB |
694 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
695 | ||
1edfb1af JB |
696 | if (!skb) |
697 | goto no_frame; | |
698 | ||
071d9ac2 | 699 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
700 | tid_agg_rx->stored_mpdu_num--; |
701 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
702 | status = IEEE80211_SKB_RXCB(skb); |
703 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
f9e124fb | 704 | __skb_queue_tail(frames, skb); |
1edfb1af JB |
705 | |
706 | no_frame: | |
9a886586 | 707 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
708 | } |
709 | ||
d3b2fb53 | 710 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 711 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
712 | u16 head_seq_num, |
713 | struct sk_buff_head *frames) | |
1edfb1af JB |
714 | { |
715 | int index; | |
716 | ||
dd318575 JB |
717 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
718 | ||
9a886586 | 719 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 720 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
721 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
722 | frames); | |
1edfb1af JB |
723 | } |
724 | } | |
725 | ||
726 | /* | |
727 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
728 | * the skb was added to the buffer longer than this time ago, the earlier | |
729 | * frames that have not yet been received are assumed to be lost and the skb | |
730 | * can be released for processing. This may also release other skb's from the | |
731 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
732 | * |
733 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
734 | */ |
735 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
736 | ||
d3b2fb53 | 737 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
738 | struct tid_ampdu_rx *tid_agg_rx, |
739 | struct sk_buff_head *frames) | |
aa0c8636 | 740 | { |
2bff8ebf | 741 | int index, j; |
aa0c8636 | 742 | |
dd318575 JB |
743 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
744 | ||
aa0c8636 | 745 | /* release the buffer until next missing frame */ |
2e3049b7 | 746 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 747 | if (!tid_agg_rx->reorder_buf[index] && |
07ae2dfc | 748 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
749 | /* |
750 | * No buffers ready to be released, but check whether any | |
751 | * frames in the reorder buffer have timed out. | |
752 | */ | |
aa0c8636 CL |
753 | int skipped = 1; |
754 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
755 | j = (j + 1) % tid_agg_rx->buf_size) { | |
756 | if (!tid_agg_rx->reorder_buf[j]) { | |
757 | skipped++; | |
758 | continue; | |
759 | } | |
499fe9a4 DH |
760 | if (skipped && |
761 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 762 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 763 | goto set_release_timer; |
aa0c8636 | 764 | |
bdcbd8e0 JB |
765 | ht_dbg_ratelimited(sdata, |
766 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
767 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
768 | frames); | |
aa0c8636 CL |
769 | |
770 | /* | |
771 | * Increment the head seq# also for the skipped slots. | |
772 | */ | |
773 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
774 | (tid_agg_rx->head_seq_num + |
775 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
776 | skipped = 0; |
777 | } | |
778 | } else while (tid_agg_rx->reorder_buf[index]) { | |
f9e124fb CL |
779 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
780 | frames); | |
2e3049b7 | 781 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 782 | } |
2bff8ebf CL |
783 | |
784 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 785 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
786 | |
787 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
788 | j = (j + 1) % tid_agg_rx->buf_size) { | |
789 | if (tid_agg_rx->reorder_buf[j]) | |
790 | break; | |
791 | } | |
792 | ||
793 | set_release_timer: | |
794 | ||
795 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 796 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
797 | HT_RX_REORDER_BUF_TIMEOUT); |
798 | } else { | |
799 | del_timer(&tid_agg_rx->reorder_timer); | |
800 | } | |
aa0c8636 CL |
801 | } |
802 | ||
1edfb1af JB |
803 | /* |
804 | * As this function belongs to the RX path it must be under | |
805 | * rcu_read_lock protection. It returns false if the frame | |
806 | * can be processed immediately, true if it was consumed. | |
807 | */ | |
d3b2fb53 | 808 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 809 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
810 | struct sk_buff *skb, |
811 | struct sk_buff_head *frames) | |
1edfb1af JB |
812 | { |
813 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
814 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
815 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
816 | u16 head_seq_num, buf_size; | |
817 | int index; | |
2bff8ebf | 818 | bool ret = true; |
1edfb1af | 819 | |
dd318575 JB |
820 | spin_lock(&tid_agg_rx->reorder_lock); |
821 | ||
1edfb1af JB |
822 | buf_size = tid_agg_rx->buf_size; |
823 | head_seq_num = tid_agg_rx->head_seq_num; | |
824 | ||
825 | /* frame with out of date sequence number */ | |
9a886586 | 826 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 827 | dev_kfree_skb(skb); |
2bff8ebf | 828 | goto out; |
1edfb1af JB |
829 | } |
830 | ||
831 | /* | |
832 | * If frame the sequence number exceeds our buffering window | |
833 | * size release some previous frames to make room for this one. | |
834 | */ | |
9a886586 JB |
835 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
836 | head_seq_num = ieee80211_sn_inc( | |
837 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 838 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 839 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 840 | head_seq_num, frames); |
1edfb1af JB |
841 | } |
842 | ||
843 | /* Now the new frame is always in the range of the reordering buffer */ | |
844 | ||
2e3049b7 | 845 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
846 | |
847 | /* check if we already stored this frame */ | |
848 | if (tid_agg_rx->reorder_buf[index]) { | |
849 | dev_kfree_skb(skb); | |
2bff8ebf | 850 | goto out; |
1edfb1af JB |
851 | } |
852 | ||
853 | /* | |
854 | * If the current MPDU is in the right order and nothing else | |
855 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
856 | * If it is first but there's something stored, we may be able |
857 | * to release frames after this one. | |
1edfb1af JB |
858 | */ |
859 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
860 | tid_agg_rx->stored_mpdu_num == 0) { | |
9a886586 JB |
861 | tid_agg_rx->head_seq_num = |
862 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
863 | ret = false; |
864 | goto out; | |
1edfb1af JB |
865 | } |
866 | ||
867 | /* put the frame in the reordering buffer */ | |
868 | tid_agg_rx->reorder_buf[index] = skb; | |
869 | tid_agg_rx->reorder_time[index] = jiffies; | |
870 | tid_agg_rx->stored_mpdu_num++; | |
f9e124fb | 871 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
1edfb1af | 872 | |
2bff8ebf CL |
873 | out: |
874 | spin_unlock(&tid_agg_rx->reorder_lock); | |
875 | return ret; | |
1edfb1af JB |
876 | } |
877 | ||
878 | /* | |
879 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
880 | * true if the MPDU was buffered, false if it should be processed. | |
881 | */ | |
f9e124fb CL |
882 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
883 | struct sk_buff_head *frames) | |
1edfb1af | 884 | { |
2569a826 JB |
885 | struct sk_buff *skb = rx->skb; |
886 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 887 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 888 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 889 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
890 | struct tid_ampdu_rx *tid_agg_rx; |
891 | u16 sc; | |
6cc00d54 | 892 | u8 tid, ack_policy; |
1edfb1af | 893 | |
051a41fa JB |
894 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
895 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 896 | goto dont_reorder; |
1edfb1af JB |
897 | |
898 | /* | |
899 | * filter the QoS data rx stream according to | |
900 | * STA/TID and check if this STA/TID is on aggregation | |
901 | */ | |
902 | ||
1edfb1af | 903 | if (!sta) |
2569a826 | 904 | goto dont_reorder; |
1edfb1af | 905 | |
6cc00d54 TP |
906 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
907 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
908 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
909 | ||
a87f736d JB |
910 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
911 | if (!tid_agg_rx) | |
912 | goto dont_reorder; | |
1edfb1af JB |
913 | |
914 | /* qos null data frames are excluded */ | |
915 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 916 | goto dont_reorder; |
1edfb1af | 917 | |
6cc00d54 TP |
918 | /* not part of a BA session */ |
919 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
920 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
921 | goto dont_reorder; | |
922 | ||
660c6a44 TP |
923 | /* not actually part of this BA session */ |
924 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
925 | goto dont_reorder; | |
926 | ||
1edfb1af JB |
927 | /* new, potentially un-ordered, ampdu frame - process it */ |
928 | ||
929 | /* reset session timer */ | |
930 | if (tid_agg_rx->timeout) | |
12d3952f | 931 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
932 | |
933 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
934 | sc = le16_to_cpu(hdr->seq_ctrl); | |
935 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 936 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
937 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
938 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 939 | return; |
1edfb1af JB |
940 | } |
941 | ||
a87f736d JB |
942 | /* |
943 | * No locking needed -- we will only ever process one | |
944 | * RX packet at a time, and thus own tid_agg_rx. All | |
945 | * other code manipulating it needs to (and does) make | |
946 | * sure that we cannot get to it any more before doing | |
947 | * anything with it. | |
948 | */ | |
f9e124fb CL |
949 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
950 | frames)) | |
2569a826 JB |
951 | return; |
952 | ||
953 | dont_reorder: | |
f9e124fb | 954 | __skb_queue_tail(frames, skb); |
1edfb1af | 955 | } |
33b64eb2 | 956 | |
49461622 | 957 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 958 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 959 | { |
a7767f95 | 960 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 961 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 962 | |
6b0f3274 JB |
963 | /* |
964 | * Drop duplicate 802.11 retransmissions | |
965 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
966 | */ | |
967 | if (rx->skb->len >= 24 && rx->sta && | |
968 | !ieee80211_is_ctl(hdr->frame_control) && | |
969 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && | |
970 | !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 971 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 972 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 973 | hdr->seq_ctrl)) { |
554891e6 | 974 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
975 | rx->local->dot11FrameDuplicateCount++; |
976 | rx->sta->num_duplicates++; | |
977 | } | |
b1f93314 | 978 | return RX_DROP_UNUSABLE; |
0cfcefef | 979 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 980 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 981 | } |
571ecf67 JB |
982 | } |
983 | ||
571ecf67 JB |
984 | if (unlikely(rx->skb->len < 16)) { |
985 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 986 | return RX_DROP_MONITOR; |
571ecf67 JB |
987 | } |
988 | ||
571ecf67 JB |
989 | /* Drop disallowed frame classes based on STA auth/assoc state; |
990 | * IEEE 802.11, Chap 5.5. | |
991 | * | |
ccd7b362 JB |
992 | * mac80211 filters only based on association state, i.e. it drops |
993 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
994 | * deauth/disassoc frames when needed. In addition, hostapd is |
995 | * responsible for filtering on both auth and assoc states. | |
996 | */ | |
33b64eb2 | 997 | |
902acc78 | 998 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 999 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1000 | |
a7767f95 HH |
1001 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1002 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1003 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1004 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 1005 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1006 | /* |
1007 | * accept port control frames from the AP even when it's not | |
1008 | * yet marked ASSOC to prevent a race where we don't set the | |
1009 | * assoc bit quickly enough before it sends the first frame | |
1010 | */ | |
1011 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1012 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1013 | unsigned int hdrlen; |
1014 | __be16 ethertype; | |
1015 | ||
1016 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1017 | ||
1018 | if (rx->skb->len < hdrlen + 8) | |
1019 | return RX_DROP_MONITOR; | |
1020 | ||
1021 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1022 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1023 | return RX_CONTINUE; |
1024 | } | |
21fc7560 JB |
1025 | |
1026 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1027 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1028 | hdr->addr2, | |
1029 | GFP_ATOMIC)) | |
1030 | return RX_DROP_UNUSABLE; | |
1031 | ||
e4c26add | 1032 | return RX_DROP_MONITOR; |
2a33bee2 | 1033 | } |
571ecf67 | 1034 | |
9ae54c84 | 1035 | return RX_CONTINUE; |
570bd537 JB |
1036 | } |
1037 | ||
1038 | ||
572e0012 KV |
1039 | static ieee80211_rx_result debug_noinline |
1040 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1041 | { | |
1042 | struct ieee80211_local *local; | |
1043 | struct ieee80211_hdr *hdr; | |
1044 | struct sk_buff *skb; | |
1045 | ||
1046 | local = rx->local; | |
1047 | skb = rx->skb; | |
1048 | hdr = (struct ieee80211_hdr *) skb->data; | |
1049 | ||
1050 | if (!local->pspolling) | |
1051 | return RX_CONTINUE; | |
1052 | ||
1053 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1054 | /* this is not from AP */ | |
1055 | return RX_CONTINUE; | |
1056 | ||
1057 | if (!ieee80211_is_data(hdr->frame_control)) | |
1058 | return RX_CONTINUE; | |
1059 | ||
1060 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1061 | /* AP has no more frames buffered for us */ | |
1062 | local->pspolling = false; | |
1063 | return RX_CONTINUE; | |
1064 | } | |
1065 | ||
1066 | /* more data bit is set, let's request a new frame from the AP */ | |
1067 | ieee80211_send_pspoll(local, rx->sdata); | |
1068 | ||
1069 | return RX_CONTINUE; | |
1070 | } | |
1071 | ||
d012a605 | 1072 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1073 | { |
133b8226 | 1074 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1075 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1076 | struct ps_data *ps; |
0795af57 | 1077 | |
d012a605 MP |
1078 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1079 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1080 | ps = &sdata->bss->ps; | |
1081 | else | |
1082 | return; | |
1083 | ||
1084 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1085 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1086 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1087 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1088 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1089 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1090 | } |
1091 | ||
d012a605 | 1092 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1093 | { |
bdcbd8e0 JB |
1094 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1095 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1096 | |
c2c98fde | 1097 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1098 | /* |
1099 | * Clear the flag only if the other one is still set | |
1100 | * so that the TX path won't start TX'ing new frames | |
1101 | * directly ... In the case that the driver flag isn't | |
1102 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1103 | */ | |
1104 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1105 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1106 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1107 | return; |
1108 | } | |
1109 | ||
5ac2e350 JB |
1110 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1111 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1112 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1113 | } |
1114 | ||
d057e5a3 AN |
1115 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1116 | { | |
1117 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1118 | bool in_ps; | |
1119 | ||
1120 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1121 | ||
1122 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1123 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1124 | if ((start && in_ps) || (!start && !in_ps)) |
1125 | return -EINVAL; | |
1126 | ||
1127 | if (start) | |
d012a605 | 1128 | sta_ps_start(sta_inf); |
d057e5a3 | 1129 | else |
d012a605 | 1130 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1131 | |
1132 | return 0; | |
1133 | } | |
1134 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1135 | ||
47086fc5 JB |
1136 | static ieee80211_rx_result debug_noinline |
1137 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1138 | { | |
1139 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1140 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1141 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1142 | int tid, ac; | |
1143 | ||
1144 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1145 | return RX_CONTINUE; | |
1146 | ||
1147 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1148 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1149 | return RX_CONTINUE; | |
1150 | ||
1151 | /* | |
1152 | * The device handles station powersave, so don't do anything about | |
1153 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1154 | * it to mac80211 since they're handled.) | |
1155 | */ | |
1156 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1157 | return RX_CONTINUE; | |
1158 | ||
1159 | /* | |
1160 | * Don't do anything if the station isn't already asleep. In | |
1161 | * the uAPSD case, the station will probably be marked asleep, | |
1162 | * in the PS-Poll case the station must be confused ... | |
1163 | */ | |
c2c98fde | 1164 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1165 | return RX_CONTINUE; |
1166 | ||
1167 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1168 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1169 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1170 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1171 | else | |
c2c98fde | 1172 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1173 | } |
47086fc5 JB |
1174 | |
1175 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1176 | * count as an dropped frame. */ | |
1177 | dev_kfree_skb(rx->skb); | |
1178 | ||
1179 | return RX_QUEUED; | |
1180 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1181 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1182 | ieee80211_has_pm(hdr->frame_control) && | |
1183 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1184 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1185 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1186 | ac = ieee802_1d_to_ac[tid & 7]; | |
1187 | ||
1188 | /* | |
1189 | * If this AC is not trigger-enabled do nothing. | |
1190 | * | |
1191 | * NB: This could/should check a separate bitmap of trigger- | |
1192 | * enabled queues, but for now we only implement uAPSD w/o | |
1193 | * TSPEC changes to the ACs, so they're always the same. | |
1194 | */ | |
1195 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1196 | return RX_CONTINUE; | |
1197 | ||
1198 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1199 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1200 | return RX_CONTINUE; |
1201 | ||
c2c98fde | 1202 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1203 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1204 | else | |
c2c98fde | 1205 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1206 | } |
1207 | ||
1208 | return RX_CONTINUE; | |
1209 | } | |
1210 | ||
49461622 | 1211 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1212 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1213 | { |
1214 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1215 | struct sk_buff *skb = rx->skb; |
1216 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1217 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1218 | int i; |
571ecf67 JB |
1219 | |
1220 | if (!sta) | |
9ae54c84 | 1221 | return RX_CONTINUE; |
571ecf67 | 1222 | |
b291ba11 JB |
1223 | /* |
1224 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1225 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1226 | * current IBSS network alive in cases where other STAs start | |
1227 | * using different BSSID. This will also give the station another | |
1228 | * chance to restart the authentication/authorization in case | |
1229 | * something went wrong the first time. | |
b291ba11 | 1230 | */ |
05c914fe | 1231 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1232 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1233 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1234 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1235 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1236 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1237 | if (ieee80211_is_data(hdr->frame_control) && |
1238 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1239 | sta->last_rx_rate_idx = status->rate_idx; |
1240 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1241 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1242 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1243 | } |
1244 | } | |
b291ba11 JB |
1245 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1246 | /* | |
33b64eb2 LCC |
1247 | * Mesh beacons will update last_rx when if they are found to |
1248 | * match the current local configuration when processed. | |
571ecf67 | 1249 | */ |
b291ba11 | 1250 | sta->last_rx = jiffies; |
3af6334c FF |
1251 | if (ieee80211_is_data(hdr->frame_control)) { |
1252 | sta->last_rx_rate_idx = status->rate_idx; | |
1253 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1254 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1255 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1256 | } |
571ecf67 JB |
1257 | } |
1258 | ||
554891e6 | 1259 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1260 | return RX_CONTINUE; |
571ecf67 | 1261 | |
3cf335d5 KV |
1262 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1263 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1264 | ||
571ecf67 JB |
1265 | sta->rx_fragments++; |
1266 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1267 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1268 | sta->last_signal = status->signal; | |
1269 | ewma_add(&sta->avg_signal, -status->signal); | |
1270 | } | |
571ecf67 | 1271 | |
ef0621e8 FF |
1272 | if (status->chains) { |
1273 | sta->chains = status->chains; | |
1274 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1275 | int signal = status->chain_signal[i]; | |
1276 | ||
1277 | if (!(status->chains & BIT(i))) | |
1278 | continue; | |
1279 | ||
1280 | sta->chain_signal_last[i] = signal; | |
1281 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1282 | } | |
1283 | } | |
1284 | ||
72eaa43a JB |
1285 | /* |
1286 | * Change STA power saving mode only at the end of a frame | |
1287 | * exchange sequence. | |
1288 | */ | |
d057e5a3 AN |
1289 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1290 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1291 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1292 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1293 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1294 | /* PM bit is only checked in frames where it isn't reserved, | |
1295 | * in AP mode it's reserved in non-bufferable management frames | |
1296 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1297 | */ | |
1298 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1299 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1300 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1301 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1302 | sta_ps_end(sta); |
72eaa43a JB |
1303 | } else { |
1304 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1305 | sta_ps_start(sta); |
72eaa43a | 1306 | } |
571ecf67 JB |
1307 | } |
1308 | ||
3f52b7e3 MP |
1309 | /* mesh power save support */ |
1310 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1311 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1312 | ||
22403def JB |
1313 | /* |
1314 | * Drop (qos-)data::nullfunc frames silently, since they | |
1315 | * are used only to control station power saving mode. | |
1316 | */ | |
1317 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1318 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1319 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1320 | |
1321 | /* | |
1322 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1323 | * that was not moved to a 4-addr STA vlan yet send |
1324 | * the event to userspace and for older hostapd drop | |
1325 | * the frame to the monitor interface. | |
d524215f FF |
1326 | */ |
1327 | if (ieee80211_has_a4(hdr->frame_control) && | |
1328 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1329 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1330 | !rx->sdata->u.vlan.sta))) { |
1331 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1332 | cfg80211_rx_unexpected_4addr_frame( | |
1333 | rx->sdata->dev, sta->sta.addr, | |
1334 | GFP_ATOMIC); | |
d524215f | 1335 | return RX_DROP_MONITOR; |
e7f4a940 | 1336 | } |
22403def JB |
1337 | /* |
1338 | * Update counter and free packet here to avoid | |
1339 | * counting this as a dropped packed. | |
1340 | */ | |
571ecf67 JB |
1341 | sta->rx_packets++; |
1342 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1343 | return RX_QUEUED; |
571ecf67 JB |
1344 | } |
1345 | ||
9ae54c84 | 1346 | return RX_CONTINUE; |
571ecf67 JB |
1347 | } /* ieee80211_rx_h_sta_process */ |
1348 | ||
86c228a7 JA |
1349 | static ieee80211_rx_result debug_noinline |
1350 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1351 | { | |
1352 | struct sk_buff *skb = rx->skb; | |
1353 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1354 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1355 | int keyidx; | |
1356 | int hdrlen; | |
1357 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1358 | struct ieee80211_key *sta_ptk = NULL; | |
1359 | int mmie_keyidx = -1; | |
1360 | __le16 fc; | |
2475b1cc | 1361 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1362 | |
1363 | /* | |
1364 | * Key selection 101 | |
1365 | * | |
1366 | * There are four types of keys: | |
1367 | * - GTK (group keys) | |
1368 | * - IGTK (group keys for management frames) | |
1369 | * - PTK (pairwise keys) | |
1370 | * - STK (station-to-station pairwise keys) | |
1371 | * | |
1372 | * When selecting a key, we have to distinguish between multicast | |
1373 | * (including broadcast) and unicast frames, the latter can only | |
1374 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1375 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1376 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1377 | * don't have a PTK/STK we check the key index for a WEP key. | |
1378 | * | |
1379 | * Note that in a regular BSS, multicast frames are sent by the | |
1380 | * AP only, associated stations unicast the frame to the AP first | |
1381 | * which then multicasts it on their behalf. | |
1382 | * | |
1383 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1384 | * with each station, that is something we don't currently handle. | |
1385 | * The spec seems to expect that one negotiates the same key with | |
1386 | * every station but there's no such requirement; VLANs could be | |
1387 | * possible. | |
1388 | */ | |
1389 | ||
1390 | /* | |
1391 | * No point in finding a key and decrypting if the frame is neither | |
1392 | * addressed to us nor a multicast frame. | |
1393 | */ | |
1394 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1395 | return RX_CONTINUE; | |
1396 | ||
1397 | /* start without a key */ | |
1398 | rx->key = NULL; | |
2475b1cc | 1399 | fc = hdr->frame_control; |
86c228a7 | 1400 | |
2475b1cc MS |
1401 | if (rx->sta) { |
1402 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1403 | |
2475b1cc MS |
1404 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1405 | cs = rx->sta->cipher_scheme; | |
1406 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1407 | if (unlikely(keyid < 0)) | |
1408 | return RX_DROP_UNUSABLE; | |
1409 | } | |
1410 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1411 | } | |
86c228a7 JA |
1412 | |
1413 | if (!ieee80211_has_protected(fc)) | |
1414 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1415 | ||
1416 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1417 | rx->key = sta_ptk; | |
1418 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1419 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1420 | return RX_CONTINUE; | |
1421 | /* Skip decryption if the frame is not protected. */ | |
1422 | if (!ieee80211_has_protected(fc)) | |
1423 | return RX_CONTINUE; | |
1424 | } else if (mmie_keyidx >= 0) { | |
1425 | /* Broadcast/multicast robust management frame / BIP */ | |
1426 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1427 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1428 | return RX_CONTINUE; | |
1429 | ||
1430 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1431 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1432 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1433 | if (rx->sta) | |
1434 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1435 | if (!rx->key) | |
1436 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1437 | } else if (!ieee80211_has_protected(fc)) { | |
1438 | /* | |
1439 | * The frame was not protected, so skip decryption. However, we | |
1440 | * need to set rx->key if there is a key that could have been | |
1441 | * used so that the frame may be dropped if encryption would | |
1442 | * have been expected. | |
1443 | */ | |
1444 | struct ieee80211_key *key = NULL; | |
1445 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1446 | int i; | |
1447 | ||
1448 | if (ieee80211_is_mgmt(fc) && | |
1449 | is_multicast_ether_addr(hdr->addr1) && | |
1450 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1451 | rx->key = key; | |
1452 | else { | |
1453 | if (rx->sta) { | |
1454 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1455 | key = rcu_dereference(rx->sta->gtk[i]); | |
1456 | if (key) | |
1457 | break; | |
1458 | } | |
1459 | } | |
1460 | if (!key) { | |
1461 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1462 | key = rcu_dereference(sdata->keys[i]); | |
1463 | if (key) | |
1464 | break; | |
1465 | } | |
1466 | } | |
1467 | if (key) | |
1468 | rx->key = key; | |
1469 | } | |
1470 | return RX_CONTINUE; | |
1471 | } else { | |
1472 | u8 keyid; | |
2475b1cc | 1473 | |
86c228a7 JA |
1474 | /* |
1475 | * The device doesn't give us the IV so we won't be | |
1476 | * able to look up the key. That's ok though, we | |
1477 | * don't need to decrypt the frame, we just won't | |
1478 | * be able to keep statistics accurate. | |
1479 | * Except for key threshold notifications, should | |
1480 | * we somehow allow the driver to tell us which key | |
1481 | * the hardware used if this flag is set? | |
1482 | */ | |
1483 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1484 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1485 | return RX_CONTINUE; | |
1486 | ||
1487 | hdrlen = ieee80211_hdrlen(fc); | |
1488 | ||
2475b1cc MS |
1489 | if (cs) { |
1490 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1491 | |
2475b1cc MS |
1492 | if (unlikely(keyidx < 0)) |
1493 | return RX_DROP_UNUSABLE; | |
1494 | } else { | |
1495 | if (rx->skb->len < 8 + hdrlen) | |
1496 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1497 | /* | |
1498 | * no need to call ieee80211_wep_get_keyidx, | |
1499 | * it verifies a bunch of things we've done already | |
1500 | */ | |
1501 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1502 | keyidx = keyid >> 6; | |
1503 | } | |
86c228a7 JA |
1504 | |
1505 | /* check per-station GTK first, if multicast packet */ | |
1506 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1507 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1508 | ||
1509 | /* if not found, try default key */ | |
1510 | if (!rx->key) { | |
1511 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1512 | ||
1513 | /* | |
1514 | * RSNA-protected unicast frames should always be | |
1515 | * sent with pairwise or station-to-station keys, | |
1516 | * but for WEP we allow using a key index as well. | |
1517 | */ | |
1518 | if (rx->key && | |
1519 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1520 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1521 | !is_multicast_ether_addr(hdr->addr1)) | |
1522 | rx->key = NULL; | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | if (rx->key) { | |
1527 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1528 | return RX_DROP_MONITOR; | |
1529 | ||
1530 | rx->key->tx_rx_count++; | |
1531 | /* TODO: add threshold stuff again */ | |
1532 | } else { | |
1533 | return RX_DROP_MONITOR; | |
1534 | } | |
1535 | ||
1536 | switch (rx->key->conf.cipher) { | |
1537 | case WLAN_CIPHER_SUITE_WEP40: | |
1538 | case WLAN_CIPHER_SUITE_WEP104: | |
1539 | result = ieee80211_crypto_wep_decrypt(rx); | |
1540 | break; | |
1541 | case WLAN_CIPHER_SUITE_TKIP: | |
1542 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1543 | break; | |
1544 | case WLAN_CIPHER_SUITE_CCMP: | |
1545 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1546 | break; | |
1547 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1548 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1549 | break; | |
1550 | default: | |
2475b1cc | 1551 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1552 | } |
1553 | ||
1554 | /* the hdr variable is invalid after the decrypt handlers */ | |
1555 | ||
1556 | /* either the frame has been decrypted or will be dropped */ | |
1557 | status->flag |= RX_FLAG_DECRYPTED; | |
1558 | ||
1559 | return result; | |
1560 | } | |
1561 | ||
571ecf67 JB |
1562 | static inline struct ieee80211_fragment_entry * |
1563 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1564 | unsigned int frag, unsigned int seq, int rx_queue, | |
1565 | struct sk_buff **skb) | |
1566 | { | |
1567 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1568 | |
571ecf67 JB |
1569 | entry = &sdata->fragments[sdata->fragment_next++]; |
1570 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1571 | sdata->fragment_next = 0; | |
1572 | ||
bdcbd8e0 | 1573 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1574 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1575 | |
1576 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1577 | *skb = NULL; | |
1578 | entry->first_frag_time = jiffies; | |
1579 | entry->seq = seq; | |
1580 | entry->rx_queue = rx_queue; | |
1581 | entry->last_frag = frag; | |
1582 | entry->ccmp = 0; | |
1583 | entry->extra_len = 0; | |
1584 | ||
1585 | return entry; | |
1586 | } | |
1587 | ||
1588 | static inline struct ieee80211_fragment_entry * | |
1589 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1590 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1591 | int rx_queue, struct ieee80211_hdr *hdr) |
1592 | { | |
1593 | struct ieee80211_fragment_entry *entry; | |
1594 | int i, idx; | |
1595 | ||
1596 | idx = sdata->fragment_next; | |
1597 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1598 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1599 | |
1600 | idx--; | |
1601 | if (idx < 0) | |
1602 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1603 | ||
1604 | entry = &sdata->fragments[idx]; | |
1605 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1606 | entry->rx_queue != rx_queue || | |
1607 | entry->last_frag + 1 != frag) | |
1608 | continue; | |
1609 | ||
b73d70ad | 1610 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1611 | |
b73d70ad HH |
1612 | /* |
1613 | * Check ftype and addresses are equal, else check next fragment | |
1614 | */ | |
1615 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1616 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1617 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1618 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1619 | continue; |
1620 | ||
ab46623e | 1621 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1622 | __skb_queue_purge(&entry->skb_list); |
1623 | continue; | |
1624 | } | |
1625 | return entry; | |
1626 | } | |
1627 | ||
1628 | return NULL; | |
1629 | } | |
1630 | ||
49461622 | 1631 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1632 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1633 | { |
1634 | struct ieee80211_hdr *hdr; | |
1635 | u16 sc; | |
358c8d9d | 1636 | __le16 fc; |
571ecf67 JB |
1637 | unsigned int frag, seq; |
1638 | struct ieee80211_fragment_entry *entry; | |
1639 | struct sk_buff *skb; | |
554891e6 | 1640 | struct ieee80211_rx_status *status; |
571ecf67 | 1641 | |
b73d70ad | 1642 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1643 | fc = hdr->frame_control; |
f7fbf70e JC |
1644 | |
1645 | if (ieee80211_is_ctl(fc)) | |
1646 | return RX_CONTINUE; | |
1647 | ||
571ecf67 JB |
1648 | sc = le16_to_cpu(hdr->seq_ctrl); |
1649 | frag = sc & IEEE80211_SCTL_FRAG; | |
1650 | ||
358c8d9d | 1651 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1652 | is_multicast_ether_addr(hdr->addr1))) { |
1653 | /* not fragmented */ | |
1654 | goto out; | |
1655 | } | |
1656 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1657 | ||
e3cf8b3f ZY |
1658 | if (skb_linearize(rx->skb)) |
1659 | return RX_DROP_UNUSABLE; | |
1660 | ||
058897a4 AK |
1661 | /* |
1662 | * skb_linearize() might change the skb->data and | |
1663 | * previously cached variables (in this case, hdr) need to | |
1664 | * be refreshed with the new data. | |
1665 | */ | |
1666 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1667 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1668 | ||
1669 | if (frag == 0) { | |
1670 | /* This is the first fragment of a new frame. */ | |
1671 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1672 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1673 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1674 | ieee80211_has_protected(fc)) { |
9e26297a | 1675 | int queue = rx->security_idx; |
571ecf67 JB |
1676 | /* Store CCMP PN so that we can verify that the next |
1677 | * fragment has a sequential PN value. */ | |
1678 | entry->ccmp = 1; | |
1679 | memcpy(entry->last_pn, | |
9190252c | 1680 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1681 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1682 | } |
9ae54c84 | 1683 | return RX_QUEUED; |
571ecf67 JB |
1684 | } |
1685 | ||
1686 | /* This is a fragment for a frame that should already be pending in | |
1687 | * fragment cache. Add this fragment to the end of the pending entry. | |
1688 | */ | |
9e26297a JB |
1689 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1690 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1691 | if (!entry) { |
1692 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1693 | return RX_DROP_MONITOR; |
571ecf67 JB |
1694 | } |
1695 | ||
1696 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1697 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1698 | if (entry->ccmp) { | |
1699 | int i; | |
4325f6ca | 1700 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1701 | int queue; |
97359d12 | 1702 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1703 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1704 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1705 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1706 | pn[i]++; |
1707 | if (pn[i]) | |
1708 | break; | |
1709 | } | |
9e26297a | 1710 | queue = rx->security_idx; |
9190252c | 1711 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1712 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1713 | return RX_DROP_UNUSABLE; |
4325f6ca | 1714 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1715 | } |
1716 | ||
358c8d9d | 1717 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1718 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1719 | entry->last_frag = frag; | |
1720 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1721 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1722 | rx->skb = NULL; |
9ae54c84 | 1723 | return RX_QUEUED; |
571ecf67 JB |
1724 | } |
1725 | ||
1726 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1727 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1728 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1729 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1730 | GFP_ATOMIC))) { | |
1731 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1732 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1733 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1734 | } |
1735 | } | |
1736 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1737 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1738 | dev_kfree_skb(skb); | |
1739 | } | |
1740 | ||
1741 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1742 | status = IEEE80211_SKB_RXCB(rx->skb); |
1743 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1744 | |
1745 | out: | |
1746 | if (rx->sta) | |
1747 | rx->sta->rx_packets++; | |
1748 | if (is_multicast_ether_addr(hdr->addr1)) | |
1749 | rx->local->dot11MulticastReceivedFrameCount++; | |
1750 | else | |
1751 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1752 | return RX_CONTINUE; |
571ecf67 JB |
1753 | } |
1754 | ||
1df332e8 | 1755 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1756 | { |
1df332e8 | 1757 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1758 | return -EACCES; |
571ecf67 | 1759 | |
76ee65bf | 1760 | return 0; |
571ecf67 JB |
1761 | } |
1762 | ||
1df332e8 | 1763 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1764 | { |
eb9fb5b8 JB |
1765 | struct sk_buff *skb = rx->skb; |
1766 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1767 | ||
3017b80b | 1768 | /* |
7848ba7d JB |
1769 | * Pass through unencrypted frames if the hardware has |
1770 | * decrypted them already. | |
3017b80b | 1771 | */ |
eb9fb5b8 | 1772 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1773 | return 0; |
571ecf67 JB |
1774 | |
1775 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1776 | if (unlikely(!ieee80211_has_protected(fc) && |
1777 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1778 | ieee80211_is_data(fc) && |
b3fc9c6c | 1779 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1780 | return -EACCES; |
bef5d1c7 JB |
1781 | |
1782 | return 0; | |
1783 | } | |
1784 | ||
1df332e8 | 1785 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1786 | { |
1787 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1788 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1789 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1790 | |
e3efca0a JM |
1791 | /* |
1792 | * Pass through unencrypted frames if the hardware has | |
1793 | * decrypted them already. | |
1794 | */ | |
1795 | if (status->flag & RX_FLAG_DECRYPTED) | |
1796 | return 0; | |
bef5d1c7 | 1797 | |
c2c98fde | 1798 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1799 | if (unlikely(!ieee80211_has_protected(fc) && |
1800 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1801 | rx->key)) { |
6ff57cf8 JB |
1802 | if (ieee80211_is_deauth(fc) || |
1803 | ieee80211_is_disassoc(fc)) | |
1804 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1805 | rx->skb->data, | |
1806 | rx->skb->len); | |
f2ca3ea4 | 1807 | return -EACCES; |
cf4e594e | 1808 | } |
f2ca3ea4 | 1809 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1810 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1811 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1812 | if (ieee80211_is_deauth(fc) || |
1813 | ieee80211_is_disassoc(fc)) | |
1814 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1815 | rx->skb->data, | |
1816 | rx->skb->len); | |
f2ca3ea4 | 1817 | return -EACCES; |
cf4e594e | 1818 | } |
f2ca3ea4 JM |
1819 | /* |
1820 | * When using MFP, Action frames are not allowed prior to | |
1821 | * having configured keys. | |
1822 | */ | |
1823 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1824 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1825 | return -EACCES; |
1826 | } | |
b3fc9c6c | 1827 | |
76ee65bf | 1828 | return 0; |
571ecf67 JB |
1829 | } |
1830 | ||
76ee65bf | 1831 | static int |
4114fa21 | 1832 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1833 | { |
eb9fb5b8 | 1834 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1835 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1836 | bool check_port_control = false; |
1837 | struct ethhdr *ehdr; | |
1838 | int ret; | |
f14543ee | 1839 | |
4114fa21 | 1840 | *port_control = false; |
9bc383de JB |
1841 | if (ieee80211_has_a4(hdr->frame_control) && |
1842 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1843 | return -1; |
9bc383de | 1844 | |
fbb327c5 FF |
1845 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1846 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1847 | ||
1848 | if (!sdata->u.mgd.use_4addr) | |
1849 | return -1; | |
1850 | else | |
1851 | check_port_control = true; | |
1852 | } | |
1853 | ||
9bc383de | 1854 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1855 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1856 | return -1; |
571ecf67 | 1857 | |
fbb327c5 | 1858 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1859 | if (ret < 0) |
fbb327c5 FF |
1860 | return ret; |
1861 | ||
1862 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1863 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1864 | *port_control = true; | |
1865 | else if (check_port_control) | |
fbb327c5 FF |
1866 | return -1; |
1867 | ||
1868 | return 0; | |
76ee65bf | 1869 | } |
571ecf67 | 1870 | |
ce3edf6d JB |
1871 | /* |
1872 | * requires that rx->skb is a frame with ethernet header | |
1873 | */ | |
358c8d9d | 1874 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1875 | { |
c97c23e3 | 1876 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1877 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1878 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1879 | ||
1880 | /* | |
1881 | * Allow EAPOL frames to us/the PAE group address regardless | |
1882 | * of whether the frame was encrypted or not. | |
1883 | */ | |
a621fa4d | 1884 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1885 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1886 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1887 | return true; |
1888 | ||
1889 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1890 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1891 | return false; |
1892 | ||
1893 | return true; | |
1894 | } | |
1895 | ||
1896 | /* | |
1897 | * requires that rx->skb is a frame with ethernet header | |
1898 | */ | |
76ee65bf | 1899 | static void |
5cf121c3 | 1900 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1901 | { |
eb9fb5b8 JB |
1902 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1903 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1904 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1905 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1906 | struct sta_info *dsta; | |
554891e6 | 1907 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1908 | |
76ee65bf RR |
1909 | skb = rx->skb; |
1910 | xmit_skb = NULL; | |
571ecf67 | 1911 | |
05c914fe JB |
1912 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1913 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1914 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1915 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1916 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1917 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1918 | /* | |
1919 | * send multicast frames both to higher layers in | |
1920 | * local net stack and back to the wireless medium | |
1921 | */ | |
76ee65bf | 1922 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1923 | if (!xmit_skb) |
bdcbd8e0 | 1924 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1925 | dev->name); |
571ecf67 | 1926 | } else { |
abe60632 JB |
1927 | dsta = sta_info_get(sdata, skb->data); |
1928 | if (dsta) { | |
ce3edf6d JB |
1929 | /* |
1930 | * The destination station is associated to | |
1931 | * this AP (in this VLAN), so send the frame | |
1932 | * directly to it and do not pass it to local | |
1933 | * net stack. | |
571ecf67 | 1934 | */ |
76ee65bf | 1935 | xmit_skb = skb; |
571ecf67 JB |
1936 | skb = NULL; |
1937 | } | |
571ecf67 JB |
1938 | } |
1939 | } | |
1940 | ||
59d9cb07 | 1941 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
1942 | if (skb) { |
1943 | /* 'align' will only take the values 0 or 2 here since all | |
1944 | * frames are required to be aligned to 2-byte boundaries | |
1945 | * when being passed to mac80211; the code here works just | |
1946 | * as well if that isn't true, but mac80211 assumes it can | |
1947 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 1948 | */ |
9e890a1f JB |
1949 | int align; |
1950 | ||
1951 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
1952 | if (align) { |
1953 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1954 | dev_kfree_skb(skb); | |
1955 | skb = NULL; | |
1956 | } else { | |
1957 | u8 *data = skb->data; | |
8ce0b589 ZY |
1958 | size_t len = skb_headlen(skb); |
1959 | skb->data -= align; | |
1960 | memmove(skb->data, data, len); | |
1961 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1962 | } |
1963 | } | |
9e890a1f | 1964 | } |
d1c3a37c JB |
1965 | #endif |
1966 | ||
9e890a1f JB |
1967 | if (skb) { |
1968 | /* deliver to local stack */ | |
1969 | skb->protocol = eth_type_trans(skb, dev); | |
1970 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
1971 | if (rx->local->napi) |
1972 | napi_gro_receive(rx->local->napi, skb); | |
1973 | else | |
1974 | netif_receive_skb(skb); | |
571ecf67 JB |
1975 | } |
1976 | ||
76ee65bf | 1977 | if (xmit_skb) { |
aef6c928 HS |
1978 | /* |
1979 | * Send to wireless media and increase priority by 256 to | |
1980 | * keep the received priority instead of reclassifying | |
1981 | * the frame (see cfg80211_classify8021d). | |
1982 | */ | |
1983 | xmit_skb->priority += 256; | |
f831e909 | 1984 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1985 | skb_reset_network_header(xmit_skb); |
1986 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1987 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1988 | } |
76ee65bf RR |
1989 | } |
1990 | ||
49461622 | 1991 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1992 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 1993 | { |
eb9fb5b8 | 1994 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 1995 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
1996 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1997 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 1998 | struct sk_buff_head frame_list; |
554891e6 | 1999 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2000 | |
358c8d9d | 2001 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2002 | return RX_CONTINUE; |
fd4c7f2f | 2003 | |
358c8d9d | 2004 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2005 | return RX_DROP_MONITOR; |
fd4c7f2f | 2006 | |
554891e6 | 2007 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2008 | return RX_CONTINUE; |
fd4c7f2f | 2009 | |
eaf85ca7 ZY |
2010 | if (ieee80211_has_a4(hdr->frame_control) && |
2011 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2012 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2013 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2014 | |
eaf85ca7 ZY |
2015 | if (is_multicast_ether_addr(hdr->addr1) && |
2016 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2017 | rx->sdata->u.vlan.sta) || | |
2018 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2019 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2020 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2021 | |
eaf85ca7 ZY |
2022 | skb->dev = dev; |
2023 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2024 | |
e3cf8b3f ZY |
2025 | if (skb_linearize(skb)) |
2026 | return RX_DROP_UNUSABLE; | |
2027 | ||
eaf85ca7 ZY |
2028 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2029 | rx->sdata->vif.type, | |
8b3becad | 2030 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2031 | |
eaf85ca7 ZY |
2032 | while (!skb_queue_empty(&frame_list)) { |
2033 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2034 | |
358c8d9d | 2035 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2036 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2037 | continue; |
2038 | } | |
eaf85ca7 ZY |
2039 | dev->stats.rx_packets++; |
2040 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2041 | |
2042 | ieee80211_deliver_skb(rx); | |
2043 | } | |
2044 | ||
9ae54c84 | 2045 | return RX_QUEUED; |
fd4c7f2f RR |
2046 | } |
2047 | ||
bf94e17b | 2048 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2049 | static ieee80211_rx_result |
e32f85f7 LCC |
2050 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2051 | { | |
30789eb6 TP |
2052 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2053 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2054 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2055 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2056 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2057 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2058 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2059 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2060 | u16 q, hdrlen; |
e32f85f7 LCC |
2061 | |
2062 | hdr = (struct ieee80211_hdr *) skb->data; | |
2063 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2064 | |
2065 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2066 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2067 | return RX_DROP_MONITOR; | |
2068 | ||
2069 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2070 | ||
2071 | /* make sure full mesh header is there, also checks skb len */ | |
2072 | if (!pskb_may_pull(rx->skb, | |
2073 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2074 | return RX_DROP_MONITOR; | |
2075 | ||
2076 | /* reload pointers */ | |
2077 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2078 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2079 | ||
2157fdd6 TP |
2080 | /* frame is in RMC, don't forward */ |
2081 | if (ieee80211_is_data(hdr->frame_control) && | |
2082 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2083 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2084 | return RX_DROP_MONITOR; |
2085 | ||
555cb715 JC |
2086 | if (!ieee80211_is_data(hdr->frame_control) || |
2087 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2088 | return RX_CONTINUE; |
2089 | ||
2090 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2091 | return RX_DROP_MONITOR; |
2092 | ||
43b7b314 | 2093 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2094 | struct mesh_path *mppath; |
43b7b314 JC |
2095 | char *proxied_addr; |
2096 | char *mpp_addr; | |
2097 | ||
2098 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2099 | mpp_addr = hdr->addr3; | |
2100 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2101 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2102 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2103 | mpp_addr = hdr->addr4; |
2104 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2105 | } else { |
2106 | return RX_DROP_MONITOR; | |
43b7b314 | 2107 | } |
79617dee | 2108 | |
79617dee | 2109 | rcu_read_lock(); |
bf7cd94d | 2110 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2111 | if (!mppath) { |
bf7cd94d | 2112 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2113 | } else { |
2114 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2115 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2116 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2117 | spin_unlock_bh(&mppath->state_lock); |
2118 | } | |
2119 | rcu_read_unlock(); | |
2120 | } | |
2121 | ||
3c5772a5 JC |
2122 | /* Frame has reached destination. Don't forward */ |
2123 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2124 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2125 | return RX_CONTINUE; |
2126 | ||
00e96dec | 2127 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2128 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2129 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2130 | return RX_DROP_MONITOR; |
2131 | } | |
2132 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2133 | |
30789eb6 TP |
2134 | if (!--mesh_hdr->ttl) { |
2135 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2136 | goto out; |
30789eb6 TP |
2137 | } |
2138 | ||
d665508b CYY |
2139 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2140 | goto out; | |
2141 | ||
30789eb6 TP |
2142 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2143 | if (!fwd_skb) { | |
bdcbd8e0 | 2144 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2145 | sdata->name); |
30789eb6 TP |
2146 | goto out; |
2147 | } | |
2148 | ||
2149 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2150 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2151 | info = IEEE80211_SKB_CB(fwd_skb); |
2152 | memset(info, 0, sizeof(*info)); | |
2153 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2154 | info->control.vif = &rx->sdata->vif; | |
2155 | info->control.jiffies = jiffies; | |
2156 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2157 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2158 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2159 | /* update power mode indication when forwarding */ |
2160 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2161 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2162 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2163 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2164 | } else { | |
2165 | /* unable to resolve next hop */ | |
bf7cd94d | 2166 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2167 | fwd_hdr->addr3, 0, |
2168 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2169 | fwd_hdr->addr2); | |
30789eb6 | 2170 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2171 | kfree_skb(fwd_skb); |
30789eb6 | 2172 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2173 | } |
2174 | ||
30789eb6 TP |
2175 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2176 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2177 | out: |
3c5772a5 | 2178 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2179 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2180 | return RX_CONTINUE; |
2181 | else | |
2182 | return RX_DROP_MONITOR; | |
2183 | } | |
bf94e17b | 2184 | #endif |
e32f85f7 | 2185 | |
49461622 | 2186 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2187 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2188 | { |
eb9fb5b8 | 2189 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2190 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2191 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2192 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2193 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2194 | bool port_control; |
ce3edf6d | 2195 | int err; |
76ee65bf | 2196 | |
358c8d9d | 2197 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2198 | return RX_CONTINUE; |
76ee65bf | 2199 | |
358c8d9d | 2200 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2201 | return RX_DROP_MONITOR; |
76ee65bf | 2202 | |
f14543ee | 2203 | /* |
e7f4a940 JB |
2204 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2205 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2206 | */ |
2207 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2208 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2209 | if (rx->sta && | |
2210 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2211 | cfg80211_rx_unexpected_4addr_frame( | |
2212 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2213 | return RX_DROP_MONITOR; |
e7f4a940 | 2214 | } |
f14543ee | 2215 | |
4114fa21 | 2216 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2217 | if (unlikely(err)) |
e4c26add | 2218 | return RX_DROP_UNUSABLE; |
76ee65bf | 2219 | |
358c8d9d | 2220 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2221 | return RX_DROP_MONITOR; |
ce3edf6d | 2222 | |
4114fa21 FF |
2223 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2224 | unlikely(port_control) && sdata->bss) { | |
2225 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2226 | u.ap); | |
2227 | dev = sdata->dev; | |
2228 | rx->sdata = sdata; | |
2229 | } | |
2230 | ||
76ee65bf RR |
2231 | rx->skb->dev = dev; |
2232 | ||
2233 | dev->stats.rx_packets++; | |
2234 | dev->stats.rx_bytes += rx->skb->len; | |
2235 | ||
08ca944e | 2236 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2237 | !is_multicast_ether_addr( |
2238 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2239 | (!local->scanning && | |
2240 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2241 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2242 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2243 | } | |
2244 | ||
76ee65bf | 2245 | ieee80211_deliver_skb(rx); |
571ecf67 | 2246 | |
9ae54c84 | 2247 | return RX_QUEUED; |
571ecf67 JB |
2248 | } |
2249 | ||
49461622 | 2250 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2251 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2252 | { |
71364716 | 2253 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2254 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2255 | struct tid_ampdu_rx *tid_agg_rx; |
2256 | u16 start_seq_num; | |
2257 | u16 tid; | |
2258 | ||
a7767f95 | 2259 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2260 | return RX_CONTINUE; |
71364716 | 2261 | |
a7767f95 | 2262 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2263 | struct { |
2264 | __le16 control, start_seq_num; | |
2265 | } __packed bar_data; | |
2266 | ||
71364716 | 2267 | if (!rx->sta) |
a02ae758 | 2268 | return RX_DROP_MONITOR; |
8ae5977f JB |
2269 | |
2270 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2271 | &bar_data, sizeof(bar_data))) | |
2272 | return RX_DROP_MONITOR; | |
2273 | ||
8ae5977f | 2274 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2275 | |
2276 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2277 | if (!tid_agg_rx) | |
a02ae758 | 2278 | return RX_DROP_MONITOR; |
71364716 | 2279 | |
8ae5977f | 2280 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2281 | |
2282 | /* reset session timer */ | |
20ad19d0 JB |
2283 | if (tid_agg_rx->timeout) |
2284 | mod_timer(&tid_agg_rx->session_timer, | |
2285 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2286 | |
dd318575 | 2287 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2288 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2289 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2290 | start_seq_num, frames); |
dd318575 JB |
2291 | spin_unlock(&tid_agg_rx->reorder_lock); |
2292 | ||
a02ae758 JB |
2293 | kfree_skb(skb); |
2294 | return RX_QUEUED; | |
71364716 RR |
2295 | } |
2296 | ||
08daecae JB |
2297 | /* |
2298 | * After this point, we only want management frames, | |
2299 | * so we can drop all remaining control frames to | |
2300 | * cooked monitor interfaces. | |
2301 | */ | |
2302 | return RX_DROP_MONITOR; | |
71364716 RR |
2303 | } |
2304 | ||
f4f727a6 JM |
2305 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2306 | struct ieee80211_mgmt *mgmt, | |
2307 | size_t len) | |
fea14732 JM |
2308 | { |
2309 | struct ieee80211_local *local = sdata->local; | |
2310 | struct sk_buff *skb; | |
2311 | struct ieee80211_mgmt *resp; | |
2312 | ||
b203ca39 | 2313 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2314 | /* Not to own unicast address */ |
2315 | return; | |
2316 | } | |
2317 | ||
b203ca39 JP |
2318 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2319 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2320 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2321 | return; |
2322 | } | |
2323 | ||
2324 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2325 | /* Too short SA Query request frame */ | |
2326 | return; | |
2327 | } | |
2328 | ||
2329 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2330 | if (skb == NULL) | |
2331 | return; | |
2332 | ||
2333 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2334 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2335 | memset(resp, 0, 24); | |
2336 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2337 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2338 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2339 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2340 | IEEE80211_STYPE_ACTION); | |
2341 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2342 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2343 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2344 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2345 | mgmt->u.action.u.sa_query.trans_id, | |
2346 | WLAN_SA_QUERY_TR_ID_LEN); | |
2347 | ||
62ae67be | 2348 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2349 | } |
2350 | ||
2e161f78 JB |
2351 | static ieee80211_rx_result debug_noinline |
2352 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2353 | { | |
2354 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2355 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2356 | |
2357 | /* | |
2358 | * From here on, look only at management frames. | |
2359 | * Data and control frames are already handled, | |
2360 | * and unknown (reserved) frames are useless. | |
2361 | */ | |
2362 | if (rx->skb->len < 24) | |
2363 | return RX_DROP_MONITOR; | |
2364 | ||
2365 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2366 | return RX_DROP_MONITOR; | |
2367 | ||
ee971924 JB |
2368 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2369 | ieee80211_is_beacon(mgmt->frame_control) && | |
2370 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2371 | int sig = 0; |
2372 | ||
2373 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2374 | sig = status->signal; | |
2375 | ||
ee971924 JB |
2376 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2377 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2378 | status->freq, sig); |
ee971924 JB |
2379 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2380 | } | |
2381 | ||
554891e6 | 2382 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2383 | return RX_DROP_MONITOR; |
2384 | ||
2385 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2386 | return RX_DROP_UNUSABLE; | |
2387 | ||
2388 | return RX_CONTINUE; | |
2389 | } | |
2390 | ||
de1ede7a JB |
2391 | static ieee80211_rx_result debug_noinline |
2392 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2393 | { | |
2394 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2395 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2396 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2397 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2398 | int len = rx->skb->len; |
2399 | ||
2400 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2401 | return RX_CONTINUE; | |
2402 | ||
026331c4 JM |
2403 | /* drop too small frames */ |
2404 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2405 | return RX_DROP_UNUSABLE; |
de1ede7a | 2406 | |
815b8092 | 2407 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2408 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2409 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2410 | return RX_DROP_UNUSABLE; |
de1ede7a | 2411 | |
554891e6 | 2412 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2413 | return RX_DROP_UNUSABLE; |
97ebe12a | 2414 | |
de1ede7a | 2415 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2416 | case WLAN_CATEGORY_HT: |
2417 | /* reject HT action frames from stations not supporting HT */ | |
2418 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2419 | goto invalid; | |
2420 | ||
2421 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2422 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2423 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2424 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2425 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2426 | break; | |
2427 | ||
ec61cd63 | 2428 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2429 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2430 | goto invalid; | |
2431 | ||
2432 | switch (mgmt->u.action.u.ht_smps.action) { | |
2433 | case WLAN_HT_ACTION_SMPS: { | |
2434 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2435 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2436 | |
2437 | /* convert to HT capability */ | |
2438 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2439 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2440 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2441 | break; |
2442 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2443 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2444 | break; |
2445 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2446 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2447 | break; |
2448 | default: | |
2449 | goto invalid; | |
2450 | } | |
1d8d3dec JB |
2451 | |
2452 | /* if no change do nothing */ | |
af0ed69b | 2453 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2454 | goto handled; |
af0ed69b | 2455 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2456 | |
2457 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2458 | ||
64f68e5d JB |
2459 | rate_control_rate_update(local, sband, rx->sta, |
2460 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2461 | goto handled; |
2462 | } | |
ec61cd63 JB |
2463 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2464 | struct ieee80211_supported_band *sband; | |
2465 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2466 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2467 | |
2468 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2469 | if (!(rx->sta->sta.ht_cap.cap & |
2470 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2471 | goto handled; |
2472 | ||
e1a0c6b3 JB |
2473 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2474 | new_bw = IEEE80211_STA_RX_BW_20; | |
2475 | else | |
2476 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2477 | |
e1a0c6b3 | 2478 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2479 | goto handled; |
2480 | ||
ec61cd63 JB |
2481 | sband = rx->local->hw.wiphy->bands[status->band]; |
2482 | ||
2483 | rate_control_rate_update(local, sband, rx->sta, | |
2484 | IEEE80211_RC_BW_CHANGED); | |
2485 | goto handled; | |
2486 | } | |
1d8d3dec JB |
2487 | default: |
2488 | goto invalid; | |
2489 | } | |
2490 | ||
0af83d3d | 2491 | break; |
1b3a2e49 JB |
2492 | case WLAN_CATEGORY_PUBLIC: |
2493 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2494 | goto invalid; | |
2495 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2496 | break; | |
2497 | if (!rx->sta) | |
2498 | break; | |
2499 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2500 | break; | |
2501 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2502 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2503 | break; | |
2504 | if (len < offsetof(struct ieee80211_mgmt, | |
2505 | u.action.u.ext_chan_switch.variable)) | |
2506 | goto invalid; | |
2507 | goto queue; | |
0af83d3d JB |
2508 | case WLAN_CATEGORY_VHT: |
2509 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2510 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2511 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2512 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2513 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2514 | break; | |
2515 | ||
2516 | /* verify action code is present */ | |
2517 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2518 | goto invalid; | |
2519 | ||
2520 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2521 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2522 | u8 opmode; | |
2523 | ||
2524 | /* verify opmode is present */ | |
2525 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2526 | goto invalid; | |
2527 | ||
2528 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2529 | ||
2530 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2531 | opmode, status->band, |
2532 | false); | |
0af83d3d JB |
2533 | goto handled; |
2534 | } | |
2535 | default: | |
2536 | break; | |
2537 | } | |
1d8d3dec | 2538 | break; |
de1ede7a | 2539 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2540 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2541 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2542 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2543 | sdata->vif.type != NL80211_IFTYPE_AP && |
2544 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2545 | break; |
8abd3f9b | 2546 | |
026331c4 JM |
2547 | /* verify action_code is present */ |
2548 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2549 | break; | |
2550 | ||
de1ede7a JB |
2551 | switch (mgmt->u.action.u.addba_req.action_code) { |
2552 | case WLAN_ACTION_ADDBA_REQ: | |
2553 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2554 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2555 | goto invalid; |
2556 | break; | |
de1ede7a JB |
2557 | case WLAN_ACTION_ADDBA_RESP: |
2558 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2559 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2560 | goto invalid; |
2561 | break; | |
de1ede7a JB |
2562 | case WLAN_ACTION_DELBA: |
2563 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2564 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2565 | goto invalid; |
2566 | break; | |
2567 | default: | |
2568 | goto invalid; | |
de1ede7a | 2569 | } |
bed7ee6e | 2570 | |
8b58ff83 | 2571 | goto queue; |
39192c0b | 2572 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2573 | /* verify action_code is present */ |
2574 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2575 | break; | |
2576 | ||
39192c0b JB |
2577 | switch (mgmt->u.action.u.measurement.action_code) { |
2578 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2579 | if (status->band != IEEE80211_BAND_5GHZ) |
2580 | break; | |
2581 | ||
39192c0b JB |
2582 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2583 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2584 | break; |
cd7760e6 SW |
2585 | |
2586 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2587 | break; | |
2588 | ||
39192c0b | 2589 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2590 | goto handled; |
cd7760e6 SW |
2591 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2592 | u8 *bssid; | |
2593 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2594 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2595 | break; |
cc32abd4 | 2596 | |
cd7760e6 | 2597 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2598 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2599 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2600 | break; |
2601 | ||
2602 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2603 | bssid = sdata->u.mgd.bssid; | |
2604 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2605 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2606 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2607 | bssid = mgmt->sa; | |
cd7760e6 SW |
2608 | else |
2609 | break; | |
2610 | ||
2611 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2612 | break; |
c481ec97 | 2613 | |
8b58ff83 | 2614 | goto queue; |
cd7760e6 | 2615 | } |
39192c0b JB |
2616 | } |
2617 | break; | |
fea14732 JM |
2618 | case WLAN_CATEGORY_SA_QUERY: |
2619 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2620 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2621 | break; |
2622 | ||
fea14732 JM |
2623 | switch (mgmt->u.action.u.sa_query.action) { |
2624 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2625 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2626 | break; |
fea14732 | 2627 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2628 | goto handled; |
fea14732 JM |
2629 | } |
2630 | break; | |
8db09850 | 2631 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2632 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2633 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2634 | break; | |
2635 | ||
8db09850 TP |
2636 | switch (mgmt->u.action.u.self_prot.action_code) { |
2637 | case WLAN_SP_MESH_PEERING_OPEN: | |
2638 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2639 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2640 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2641 | goto invalid; | |
a6dad6a2 | 2642 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2643 | /* userspace handles this frame */ |
2644 | break; | |
2645 | goto queue; | |
2646 | case WLAN_SP_MGK_INFORM: | |
2647 | case WLAN_SP_MGK_ACK: | |
2648 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2649 | goto invalid; | |
2650 | break; | |
2651 | } | |
2652 | break; | |
d3aaec8a | 2653 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2654 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2655 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2656 | break; | |
2657 | ||
77a121c3 JB |
2658 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2659 | break; | |
25d49e4d | 2660 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2661 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2662 | break; |
2663 | goto queue; | |
84040805 | 2664 | } |
026331c4 | 2665 | |
2e161f78 JB |
2666 | return RX_CONTINUE; |
2667 | ||
bed7ee6e | 2668 | invalid: |
554891e6 | 2669 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2670 | /* will return in the next handlers */ |
2671 | return RX_CONTINUE; | |
2672 | ||
2673 | handled: | |
2674 | if (rx->sta) | |
2675 | rx->sta->rx_packets++; | |
2676 | dev_kfree_skb(rx->skb); | |
2677 | return RX_QUEUED; | |
2678 | ||
2679 | queue: | |
2680 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2681 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2682 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2683 | if (rx->sta) | |
2684 | rx->sta->rx_packets++; | |
2685 | return RX_QUEUED; | |
2686 | } | |
2687 | ||
2688 | static ieee80211_rx_result debug_noinline | |
2689 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2690 | { | |
554891e6 | 2691 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2692 | int sig = 0; |
2e161f78 JB |
2693 | |
2694 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2695 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2696 | return RX_CONTINUE; |
d7907448 | 2697 | |
026331c4 JM |
2698 | /* |
2699 | * Getting here means the kernel doesn't know how to handle | |
2700 | * it, but maybe userspace does ... include returned frames | |
2701 | * so userspace can register for those to know whether ones | |
2702 | * it transmitted were processed or returned. | |
2703 | */ | |
026331c4 | 2704 | |
804483e9 JB |
2705 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2706 | sig = status->signal; | |
2707 | ||
71bbc994 | 2708 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
19504cf5 | 2709 | rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) { |
2e161f78 JB |
2710 | if (rx->sta) |
2711 | rx->sta->rx_packets++; | |
2712 | dev_kfree_skb(rx->skb); | |
2713 | return RX_QUEUED; | |
2714 | } | |
2715 | ||
2e161f78 JB |
2716 | return RX_CONTINUE; |
2717 | } | |
2718 | ||
2719 | static ieee80211_rx_result debug_noinline | |
2720 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2721 | { | |
2722 | struct ieee80211_local *local = rx->local; | |
2723 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2724 | struct sk_buff *nskb; | |
2725 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2726 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2727 | |
2728 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2729 | return RX_CONTINUE; | |
2730 | ||
2731 | /* | |
2732 | * For AP mode, hostapd is responsible for handling any action | |
2733 | * frames that we didn't handle, including returning unknown | |
2734 | * ones. For all other modes we will return them to the sender, | |
2735 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2736 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2737 | * Newer versions of hostapd shall also use the management frame |
2738 | * registration mechanisms, but older ones still use cooked | |
2739 | * monitor interfaces so push all frames there. | |
2740 | */ | |
554891e6 | 2741 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2742 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2743 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2744 | return RX_DROP_MONITOR; | |
026331c4 | 2745 | |
4b5ebccc JB |
2746 | if (is_multicast_ether_addr(mgmt->da)) |
2747 | return RX_DROP_MONITOR; | |
2748 | ||
84040805 JB |
2749 | /* do not return rejected action frames */ |
2750 | if (mgmt->u.action.category & 0x80) | |
2751 | return RX_DROP_UNUSABLE; | |
2752 | ||
2753 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2754 | GFP_ATOMIC); | |
2755 | if (nskb) { | |
292b4df6 | 2756 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2757 | |
292b4df6 JL |
2758 | nmgmt->u.action.category |= 0x80; |
2759 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2760 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2761 | |
2762 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2763 | ||
07e5a5f5 JB |
2764 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2765 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2766 | ||
2767 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2768 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2769 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2770 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2771 | info->hw_queue = | |
2772 | local->hw.offchannel_tx_hw_queue; | |
2773 | } | |
2774 | ||
2775 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2776 | status->band); | |
de1ede7a | 2777 | } |
39192c0b JB |
2778 | dev_kfree_skb(rx->skb); |
2779 | return RX_QUEUED; | |
de1ede7a JB |
2780 | } |
2781 | ||
49461622 | 2782 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2783 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2784 | { |
eb9fb5b8 | 2785 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2786 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2787 | __le16 stype; | |
571ecf67 | 2788 | |
77a121c3 | 2789 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2790 | |
77a121c3 JB |
2791 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2792 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2793 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2794 | return RX_DROP_MONITOR; | |
472dbc45 | 2795 | |
77a121c3 | 2796 | switch (stype) { |
66e67e41 | 2797 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2798 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2799 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2800 | /* process for all: mesh, mlme, ibss */ | |
2801 | break; | |
66e67e41 JB |
2802 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2803 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2804 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2805 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2806 | if (is_multicast_ether_addr(mgmt->da) && |
2807 | !is_broadcast_ether_addr(mgmt->da)) | |
2808 | return RX_DROP_MONITOR; | |
2809 | ||
77a121c3 JB |
2810 | /* process only for station */ |
2811 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2812 | return RX_DROP_MONITOR; | |
2813 | break; | |
2814 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2815 | /* process only for ibss and mesh */ |
2816 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2817 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2818 | return RX_DROP_MONITOR; |
2819 | break; | |
2820 | default: | |
2821 | return RX_DROP_MONITOR; | |
2822 | } | |
f9d540ee | 2823 | |
77a121c3 | 2824 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2825 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2826 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2827 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2828 | if (rx->sta) |
2829 | rx->sta->rx_packets++; | |
46900298 | 2830 | |
77a121c3 | 2831 | return RX_QUEUED; |
571ecf67 JB |
2832 | } |
2833 | ||
5cf121c3 | 2834 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2835 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2836 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2837 | { |
2838 | struct ieee80211_sub_if_data *sdata; | |
2839 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2840 | struct sk_buff *skb = rx->skb, *skb2; |
2841 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2842 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2843 | int needed_headroom; |
3d30d949 | 2844 | |
554891e6 JB |
2845 | /* |
2846 | * If cooked monitor has been processed already, then | |
2847 | * don't do it again. If not, set the flag. | |
2848 | */ | |
2849 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2850 | goto out_free_skb; |
554891e6 | 2851 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2852 | |
152c477a JB |
2853 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2854 | if (!local->cooked_mntrs) | |
2855 | goto out_free_skb; | |
2856 | ||
293702a3 | 2857 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2858 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2859 | |
293702a3 JB |
2860 | if (skb_headroom(skb) < needed_headroom && |
2861 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2862 | goto out_free_skb; | |
3d30d949 | 2863 | |
293702a3 | 2864 | /* prepend radiotap information */ |
973ef21a FF |
2865 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2866 | false); | |
3d30d949 MW |
2867 | |
2868 | skb_set_mac_header(skb, 0); | |
2869 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2870 | skb->pkt_type = PACKET_OTHERHOST; | |
2871 | skb->protocol = htons(ETH_P_802_2); | |
2872 | ||
2873 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2874 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2875 | continue; |
2876 | ||
05c914fe | 2877 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2878 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2879 | continue; | |
2880 | ||
2881 | if (prev_dev) { | |
2882 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2883 | if (skb2) { | |
2884 | skb2->dev = prev_dev; | |
5548a8a1 | 2885 | netif_receive_skb(skb2); |
3d30d949 MW |
2886 | } |
2887 | } | |
2888 | ||
2889 | prev_dev = sdata->dev; | |
2890 | sdata->dev->stats.rx_packets++; | |
2891 | sdata->dev->stats.rx_bytes += skb->len; | |
2892 | } | |
2893 | ||
2894 | if (prev_dev) { | |
2895 | skb->dev = prev_dev; | |
5548a8a1 | 2896 | netif_receive_skb(skb); |
554891e6 JB |
2897 | return; |
2898 | } | |
3d30d949 MW |
2899 | |
2900 | out_free_skb: | |
2901 | dev_kfree_skb(skb); | |
2902 | } | |
2903 | ||
aa0c8636 CL |
2904 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2905 | ieee80211_rx_result res) | |
2906 | { | |
2907 | switch (res) { | |
2908 | case RX_DROP_MONITOR: | |
2909 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2910 | if (rx->sta) | |
2911 | rx->sta->rx_dropped++; | |
2912 | /* fall through */ | |
2913 | case RX_CONTINUE: { | |
2914 | struct ieee80211_rate *rate = NULL; | |
2915 | struct ieee80211_supported_band *sband; | |
2916 | struct ieee80211_rx_status *status; | |
2917 | ||
2918 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2919 | ||
2920 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2921 | if (!(status->flag & RX_FLAG_HT) && |
2922 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2923 | rate = &sband->bitrates[status->rate_idx]; |
2924 | ||
2925 | ieee80211_rx_cooked_monitor(rx, rate); | |
2926 | break; | |
2927 | } | |
2928 | case RX_DROP_UNUSABLE: | |
2929 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2930 | if (rx->sta) | |
2931 | rx->sta->rx_dropped++; | |
2932 | dev_kfree_skb(rx->skb); | |
2933 | break; | |
2934 | case RX_QUEUED: | |
2935 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2936 | break; | |
2937 | } | |
2938 | } | |
571ecf67 | 2939 | |
f9e124fb CL |
2940 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2941 | struct sk_buff_head *frames) | |
58905290 | 2942 | { |
58905290 | 2943 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2944 | struct sk_buff *skb; |
8944b79f | 2945 | |
e32f85f7 LCC |
2946 | #define CALL_RXH(rxh) \ |
2947 | do { \ | |
2948 | res = rxh(rx); \ | |
2949 | if (res != RX_CONTINUE) \ | |
2569a826 | 2950 | goto rxh_next; \ |
e32f85f7 | 2951 | } while (0); |
49461622 | 2952 | |
f9e124fb | 2953 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2954 | |
f9e124fb | 2955 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2956 | /* |
2957 | * all the other fields are valid across frames | |
2958 | * that belong to an aMPDU since they are on the | |
2959 | * same TID from the same station | |
2960 | */ | |
2961 | rx->skb = skb; | |
2962 | ||
2569a826 | 2963 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 2964 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 2965 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 2966 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 2967 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
2968 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2969 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2970 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2971 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2972 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2973 | #endif |
2154c81c | 2974 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2975 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
2976 | |
2977 | /* special treatment -- needs the queue */ | |
2978 | res = ieee80211_rx_h_ctrl(rx, frames); | |
2979 | if (res != RX_CONTINUE) | |
2980 | goto rxh_next; | |
2981 | ||
2e161f78 | 2982 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 2983 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
2984 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
2985 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 2986 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 2987 | |
aa0c8636 CL |
2988 | rxh_next: |
2989 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 2990 | |
49461622 | 2991 | #undef CALL_RXH |
aa0c8636 | 2992 | } |
24a8fdad | 2993 | |
f9e124fb | 2994 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
2995 | } |
2996 | ||
4406c376 | 2997 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 2998 | { |
f9e124fb | 2999 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3000 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3001 | ||
f9e124fb CL |
3002 | __skb_queue_head_init(&reorder_release); |
3003 | ||
aa0c8636 CL |
3004 | #define CALL_RXH(rxh) \ |
3005 | do { \ | |
3006 | res = rxh(rx); \ | |
3007 | if (res != RX_CONTINUE) \ | |
3008 | goto rxh_next; \ | |
3009 | } while (0); | |
3010 | ||
aa0c8636 CL |
3011 | CALL_RXH(ieee80211_rx_h_check) |
3012 | ||
f9e124fb | 3013 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3014 | |
f9e124fb | 3015 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3016 | return; |
49461622 | 3017 | |
2569a826 | 3018 | rxh_next: |
aa0c8636 CL |
3019 | ieee80211_rx_handlers_result(rx, res); |
3020 | ||
3021 | #undef CALL_RXH | |
58905290 JB |
3022 | } |
3023 | ||
2bff8ebf | 3024 | /* |
dd318575 JB |
3025 | * This function makes calls into the RX path, therefore |
3026 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3027 | */ |
3028 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3029 | { | |
f9e124fb | 3030 | struct sk_buff_head frames; |
554891e6 JB |
3031 | struct ieee80211_rx_data rx = { |
3032 | .sta = sta, | |
3033 | .sdata = sta->sdata, | |
3034 | .local = sta->local, | |
9e26297a JB |
3035 | /* This is OK -- must be QoS data frame */ |
3036 | .security_idx = tid, | |
3037 | .seqno_idx = tid, | |
fcf8bd3b | 3038 | .flags = 0, |
554891e6 | 3039 | }; |
2c15a0cf CL |
3040 | struct tid_ampdu_rx *tid_agg_rx; |
3041 | ||
3042 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3043 | if (!tid_agg_rx) | |
3044 | return; | |
2bff8ebf | 3045 | |
f9e124fb CL |
3046 | __skb_queue_head_init(&frames); |
3047 | ||
2c15a0cf | 3048 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3049 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3050 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3051 | |
f9e124fb | 3052 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3053 | } |
3054 | ||
571ecf67 JB |
3055 | /* main receive path */ |
3056 | ||
3c2723f5 JB |
3057 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3058 | struct ieee80211_hdr *hdr) | |
23a24def | 3059 | { |
20b01f80 | 3060 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3061 | struct sk_buff *skb = rx->skb; |
3062 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3063 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3064 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3065 | ||
51fb61e7 | 3066 | switch (sdata->vif.type) { |
05c914fe | 3067 | case NL80211_IFTYPE_STATION: |
9bc383de | 3068 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3069 | return false; |
77fdaa12 | 3070 | if (!multicast && |
b203ca39 | 3071 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3072 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3073 | sdata->u.mgd.use_4addr) | |
3c2723f5 | 3074 | return false; |
554891e6 | 3075 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3076 | } |
3077 | break; | |
05c914fe | 3078 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3079 | if (!bssid) |
3c2723f5 | 3080 | return false; |
6329b8d9 FF |
3081 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3082 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3083 | return false; |
a7767f95 | 3084 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3085 | return true; |
d48b2968 | 3086 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3087 | return false; |
23a24def | 3088 | } else if (!multicast && |
b203ca39 | 3089 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3090 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3091 | return false; |
554891e6 | 3092 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3093 | } else if (!rx->sta) { |
3094 | int rate_idx; | |
5614618e JB |
3095 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3096 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3097 | else |
eb9fb5b8 | 3098 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3099 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3100 | BIT(rate_idx)); | |
0fb8ca45 | 3101 | } |
23a24def | 3102 | break; |
05c914fe | 3103 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3104 | if (!multicast && |
b203ca39 | 3105 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 | 3106 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3107 | return false; |
6032f934 | 3108 | |
554891e6 | 3109 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3110 | } |
3111 | break; | |
05c914fe JB |
3112 | case NL80211_IFTYPE_AP_VLAN: |
3113 | case NL80211_IFTYPE_AP: | |
23a24def | 3114 | if (!bssid) { |
b203ca39 | 3115 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3116 | return false; |
f142c6b9 | 3117 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3118 | /* |
3119 | * Accept public action frames even when the | |
3120 | * BSSID doesn't match, this is used for P2P | |
3121 | * and location updates. Note that mac80211 | |
3122 | * itself never looks at these frames. | |
3123 | */ | |
2b9ccd4e JB |
3124 | if (!multicast && |
3125 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3126 | return false; |
d48b2968 | 3127 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3128 | return true; |
d48b2968 | 3129 | if (!ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3130 | return false; |
554891e6 | 3131 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 3132 | } |
23a24def | 3133 | break; |
05c914fe | 3134 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3135 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3136 | return false; |
b203ca39 | 3137 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
3c2723f5 | 3138 | return false; |
23a24def | 3139 | break; |
f142c6b9 JB |
3140 | case NL80211_IFTYPE_P2P_DEVICE: |
3141 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3142 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3143 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3144 | !ieee80211_is_beacon(hdr->frame_control)) | |
3c2723f5 | 3145 | return false; |
1b737f88 JB |
3146 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3147 | !multicast) | |
f142c6b9 JB |
3148 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3149 | break; | |
2ca27bcf | 3150 | default: |
fb1c1cd6 | 3151 | /* should never get here */ |
f142c6b9 | 3152 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3153 | break; |
23a24def JB |
3154 | } |
3155 | ||
3c2723f5 | 3156 | return true; |
23a24def JB |
3157 | } |
3158 | ||
4406c376 JB |
3159 | /* |
3160 | * This function returns whether or not the SKB | |
3161 | * was destined for RX processing or not, which, | |
3162 | * if consume is true, is equivalent to whether | |
3163 | * or not the skb was consumed. | |
3164 | */ | |
3165 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3166 | struct sk_buff *skb, bool consume) | |
3167 | { | |
3168 | struct ieee80211_local *local = rx->local; | |
3169 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3170 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3171 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3172 | |
3173 | rx->skb = skb; | |
554891e6 | 3174 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3175 | |
40791942 | 3176 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3177 | return false; |
3178 | ||
4406c376 JB |
3179 | if (!consume) { |
3180 | skb = skb_copy(skb, GFP_ATOMIC); | |
3181 | if (!skb) { | |
3182 | if (net_ratelimit()) | |
3183 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3184 | "failed to copy skb for %s\n", |
4406c376 JB |
3185 | sdata->name); |
3186 | return true; | |
3187 | } | |
3188 | ||
3189 | rx->skb = skb; | |
3190 | } | |
3191 | ||
3192 | ieee80211_invoke_rx_handlers(rx); | |
3193 | return true; | |
3194 | } | |
3195 | ||
571ecf67 | 3196 | /* |
6b59db7d | 3197 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3198 | * be called with rcu_read_lock protection. |
571ecf67 | 3199 | */ |
71ebb4aa | 3200 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3201 | struct sk_buff *skb) |
571ecf67 JB |
3202 | { |
3203 | struct ieee80211_local *local = hw_to_local(hw); | |
3204 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3205 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3206 | __le16 fc; |
5cf121c3 | 3207 | struct ieee80211_rx_data rx; |
4406c376 | 3208 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3209 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3210 | int err = 0; |
571ecf67 | 3211 | |
e3cf8b3f | 3212 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3213 | memset(&rx, 0, sizeof(rx)); |
3214 | rx.skb = skb; | |
3215 | rx.local = local; | |
72abd81b | 3216 | |
e3cf8b3f | 3217 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3218 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3219 | |
4a4f1a58 JB |
3220 | if (ieee80211_is_mgmt(fc)) { |
3221 | /* drop frame if too short for header */ | |
3222 | if (skb->len < ieee80211_hdrlen(fc)) | |
3223 | err = -ENOBUFS; | |
3224 | else | |
3225 | err = skb_linearize(skb); | |
3226 | } else { | |
e3cf8b3f | 3227 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3228 | } |
e3cf8b3f ZY |
3229 | |
3230 | if (err) { | |
3231 | dev_kfree_skb(skb); | |
3232 | return; | |
3233 | } | |
3234 | ||
3235 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3236 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3237 | ieee80211_verify_alignment(&rx); |
38f3714d | 3238 | |
d48b2968 JB |
3239 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3240 | ieee80211_is_beacon(hdr->frame_control))) | |
3241 | ieee80211_scan_rx(local, skb); | |
3242 | ||
e3cf8b3f | 3243 | if (ieee80211_is_data(fc)) { |
56af3268 | 3244 | prev_sta = NULL; |
4406c376 | 3245 | |
7852e361 | 3246 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3247 | if (!prev_sta) { |
3248 | prev_sta = sta; | |
3249 | continue; | |
3250 | } | |
3251 | ||
3252 | rx.sta = prev_sta; | |
3253 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3254 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3255 | |
56af3268 | 3256 | prev_sta = sta; |
4406c376 | 3257 | } |
56af3268 BG |
3258 | |
3259 | if (prev_sta) { | |
3260 | rx.sta = prev_sta; | |
3261 | rx.sdata = prev_sta->sdata; | |
3262 | ||
4406c376 | 3263 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3264 | return; |
8e26d5ad | 3265 | goto out; |
56af3268 | 3266 | } |
4406c376 JB |
3267 | } |
3268 | ||
4b0dd98e | 3269 | prev = NULL; |
b2e7771e | 3270 | |
4b0dd98e JB |
3271 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3272 | if (!ieee80211_sdata_running(sdata)) | |
3273 | continue; | |
340e11f3 | 3274 | |
4b0dd98e JB |
3275 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3276 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3277 | continue; | |
340e11f3 | 3278 | |
4b0dd98e JB |
3279 | /* |
3280 | * frame is destined for this interface, but if it's | |
3281 | * not also for the previous one we handle that after | |
3282 | * the loop to avoid copying the SKB once too much | |
3283 | */ | |
4bb29f8c | 3284 | |
4b0dd98e | 3285 | if (!prev) { |
abe60632 | 3286 | prev = sdata; |
4b0dd98e | 3287 | continue; |
340e11f3 | 3288 | } |
4bb29f8c | 3289 | |
7852e361 | 3290 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3291 | rx.sdata = prev; |
3292 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3293 | |
4b0dd98e JB |
3294 | prev = sdata; |
3295 | } | |
3296 | ||
3297 | if (prev) { | |
7852e361 | 3298 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3299 | rx.sdata = prev; |
4406c376 | 3300 | |
4b0dd98e JB |
3301 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3302 | return; | |
571ecf67 | 3303 | } |
4406c376 | 3304 | |
8e26d5ad | 3305 | out: |
4406c376 | 3306 | dev_kfree_skb(skb); |
571ecf67 | 3307 | } |
6368e4b1 RR |
3308 | |
3309 | /* | |
3310 | * This is the receive path handler. It is called by a low level driver when an | |
3311 | * 802.11 MPDU is received from the hardware. | |
3312 | */ | |
103bf9f7 | 3313 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3314 | { |
3315 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3316 | struct ieee80211_rate *rate = NULL; |
3317 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3318 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3319 | |
d20ef63d JB |
3320 | WARN_ON_ONCE(softirq_count() == 0); |
3321 | ||
444e3803 | 3322 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3323 | goto drop; |
8318d78a JB |
3324 | |
3325 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3326 | if (WARN_ON(!sband)) |
3327 | goto drop; | |
8318d78a | 3328 | |
89c3a8ac JB |
3329 | /* |
3330 | * If we're suspending, it is possible although not too likely | |
3331 | * that we'd be receiving frames after having already partially | |
3332 | * quiesced the stack. We can't process such frames then since | |
3333 | * that might, for example, cause stations to be added or other | |
3334 | * driver callbacks be invoked. | |
3335 | */ | |
77a980dc JB |
3336 | if (unlikely(local->quiescing || local->suspended)) |
3337 | goto drop; | |
89c3a8ac | 3338 | |
04800ada AN |
3339 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3340 | if (unlikely(local->in_reconfig)) | |
3341 | goto drop; | |
3342 | ||
ea77f12f JB |
3343 | /* |
3344 | * The same happens when we're not even started, | |
3345 | * but that's worth a warning. | |
3346 | */ | |
77a980dc JB |
3347 | if (WARN_ON(!local->started)) |
3348 | goto drop; | |
ea77f12f | 3349 | |
fc885189 | 3350 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3351 | /* |
fc885189 JB |
3352 | * Validate the rate, unless a PLCP error means that |
3353 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3354 | */ |
fc885189 JB |
3355 | |
3356 | if (status->flag & RX_FLAG_HT) { | |
3357 | /* | |
3358 | * rate_idx is MCS index, which can be [0-76] | |
3359 | * as documented on: | |
3360 | * | |
3361 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3362 | * | |
3363 | * Anything else would be some sort of driver or | |
3364 | * hardware error. The driver should catch hardware | |
3365 | * errors. | |
3366 | */ | |
444e3803 | 3367 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3368 | "Rate marked as an HT rate but passed " |
3369 | "status->rate_idx is not " | |
3370 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3371 | status->rate_idx, | |
3372 | status->rate_idx)) | |
3373 | goto drop; | |
5614618e JB |
3374 | } else if (status->flag & RX_FLAG_VHT) { |
3375 | if (WARN_ONCE(status->rate_idx > 9 || | |
3376 | !status->vht_nss || | |
3377 | status->vht_nss > 8, | |
3378 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3379 | status->rate_idx, status->vht_nss)) | |
3380 | goto drop; | |
fc885189 | 3381 | } else { |
444e3803 | 3382 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3383 | goto drop; |
3384 | rate = &sband->bitrates[status->rate_idx]; | |
3385 | } | |
0fb8ca45 | 3386 | } |
6368e4b1 | 3387 | |
554891e6 JB |
3388 | status->rx_flags = 0; |
3389 | ||
6368e4b1 RR |
3390 | /* |
3391 | * key references and virtual interfaces are protected using RCU | |
3392 | * and this requires that we are in a read-side RCU section during | |
3393 | * receive processing | |
3394 | */ | |
3395 | rcu_read_lock(); | |
3396 | ||
3397 | /* | |
3398 | * Frames with failed FCS/PLCP checksum are not returned, | |
3399 | * all other frames are returned without radiotap header | |
3400 | * if it was previously present. | |
3401 | * Also, frames with less than 16 bytes are dropped. | |
3402 | */ | |
f1d58c25 | 3403 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3404 | if (!skb) { |
3405 | rcu_read_unlock(); | |
3406 | return; | |
3407 | } | |
3408 | ||
e1e54068 JB |
3409 | ieee80211_tpt_led_trig_rx(local, |
3410 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3411 | skb->len); | |
071d9ac2 | 3412 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3413 | |
3414 | rcu_read_unlock(); | |
77a980dc JB |
3415 | |
3416 | return; | |
3417 | drop: | |
3418 | kfree_skb(skb); | |
6368e4b1 | 3419 | } |
103bf9f7 | 3420 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3421 | |
3422 | /* This is a version of the rx handler that can be called from hard irq | |
3423 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3424 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3425 | { |
3426 | struct ieee80211_local *local = hw_to_local(hw); | |
3427 | ||
3428 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3429 | ||
571ecf67 JB |
3430 | skb->pkt_type = IEEE80211_RX_MSG; |
3431 | skb_queue_tail(&local->skb_queue, skb); | |
3432 | tasklet_schedule(&local->tasklet); | |
3433 | } | |
3434 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |