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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 | ||
1df332e8 | 57 | static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 58 | { |
f1d58c25 | 59 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
605f1a5b JB |
60 | struct ieee80211_hdr *hdr; |
61 | ||
0059b2b1 | 62 | hdr = (void *)(skb->data); |
b2e7771e | 63 | |
4c298677 JB |
64 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
65 | RX_FLAG_FAILED_PLCP_CRC | | |
66 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
b2e7771e | 67 | return 1; |
0059b2b1 | 68 | if (unlikely(skb->len < 16 + present_fcs_len)) |
b2e7771e | 69 | return 1; |
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)) | |
b2e7771e JB |
73 | return 1; |
74 | return 0; | |
75 | } | |
76 | ||
601ae7f2 | 77 | static int |
90b9e446 JB |
78 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
79 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
80 | { |
81 | int len; | |
82 | ||
83 | /* always present fields */ | |
a144f378 | 84 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 85 | |
a144f378 | 86 | /* allocate extra bitmaps */ |
a144f378 JB |
87 | if (status->chains) |
88 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
89 | |
90 | if (ieee80211_have_rx_timestamp(status)) { | |
91 | len = ALIGN(len, 8); | |
601ae7f2 | 92 | len += 8; |
90b9e446 | 93 | } |
7fee5372 | 94 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 95 | len += 1; |
601ae7f2 | 96 | |
a144f378 JB |
97 | /* antenna field, if we don't have per-chain info */ |
98 | if (!status->chains) | |
99 | len += 1; | |
100 | ||
90b9e446 JB |
101 | /* padding for RX_FLAGS if necessary */ |
102 | len = ALIGN(len, 2); | |
601ae7f2 | 103 | |
6d744bac JB |
104 | if (status->flag & RX_FLAG_HT) /* HT info */ |
105 | len += 3; | |
106 | ||
4c298677 | 107 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 108 | len = ALIGN(len, 4); |
4c298677 JB |
109 | len += 8; |
110 | } | |
111 | ||
51648921 JB |
112 | if (status->flag & RX_FLAG_VHT) { |
113 | len = ALIGN(len, 2); | |
114 | len += 12; | |
115 | } | |
116 | ||
a144f378 JB |
117 | if (status->chains) { |
118 | /* antenna and antenna signal fields */ | |
119 | len += 2 * hweight8(status->chains); | |
120 | } | |
121 | ||
601ae7f2 BR |
122 | return len; |
123 | } | |
124 | ||
00ea6deb | 125 | /* |
601ae7f2 BR |
126 | * ieee80211_add_rx_radiotap_header - add radiotap header |
127 | * | |
128 | * add a radiotap header containing all the fields which the hardware provided. | |
129 | */ | |
130 | static void | |
131 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
132 | struct sk_buff *skb, | |
601ae7f2 | 133 | struct ieee80211_rate *rate, |
973ef21a | 134 | int rtap_len, bool has_fcs) |
601ae7f2 | 135 | { |
f1d58c25 | 136 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
137 | struct ieee80211_radiotap_header *rthdr; |
138 | unsigned char *pos; | |
a144f378 JB |
139 | __le32 *it_present; |
140 | u32 it_present_val; | |
6a86b9c7 | 141 | u16 rx_flags = 0; |
a5e70697 | 142 | u16 channel_flags = 0; |
a144f378 JB |
143 | int mpdulen, chain; |
144 | unsigned long chains = status->chains; | |
f4bda337 TP |
145 | |
146 | mpdulen = skb->len; | |
147 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
148 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
149 | |
150 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
151 | memset(rthdr, 0, rtap_len); | |
a144f378 | 152 | it_present = &rthdr->it_present; |
601ae7f2 BR |
153 | |
154 | /* radiotap header, set always present flags */ | |
0059b2b1 | 155 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
156 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
157 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
158 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
159 | ||
160 | if (!status->chains) | |
161 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
162 | ||
163 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
164 | it_present_val |= | |
165 | BIT(IEEE80211_RADIOTAP_EXT) | | |
166 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
167 | put_unaligned_le32(it_present_val, it_present); | |
168 | it_present++; | |
169 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
170 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
171 | } | |
601ae7f2 | 172 | |
a144f378 JB |
173 | put_unaligned_le32(it_present_val, it_present); |
174 | ||
175 | pos = (void *)(it_present + 1); | |
176 | ||
601ae7f2 BR |
177 | /* the order of the following fields is important */ |
178 | ||
179 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 180 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
181 | /* padding */ |
182 | while ((pos - (u8 *)rthdr) & 7) | |
183 | *pos++ = 0; | |
f4bda337 TP |
184 | put_unaligned_le64( |
185 | ieee80211_calculate_rx_timestamp(local, status, | |
186 | mpdulen, 0), | |
187 | pos); | |
1df332e8 | 188 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
189 | pos += 8; |
190 | } | |
191 | ||
192 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 193 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 194 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
195 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
196 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
197 | if (status->flag & RX_FLAG_SHORTPRE) |
198 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
199 | pos++; |
200 | ||
201 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 202 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 203 | /* |
f8d1ccf1 | 204 | * Without rate information don't add it. If we have, |
38f37be2 | 205 | * MCS information is a separate field in radiotap, |
73b48099 JB |
206 | * added below. The byte here is needed as padding |
207 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
208 | */ |
209 | *pos = 0; | |
8d6f658e | 210 | } else { |
2103dec1 | 211 | int shift = 0; |
ebe6c7ba | 212 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
213 | if (status->flag & RX_FLAG_10MHZ) |
214 | shift = 1; | |
215 | else if (status->flag & RX_FLAG_5MHZ) | |
216 | shift = 2; | |
217 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 218 | } |
601ae7f2 BR |
219 | pos++; |
220 | ||
221 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 222 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 223 | pos += 2; |
a5e70697 SW |
224 | if (status->flag & RX_FLAG_10MHZ) |
225 | channel_flags |= IEEE80211_CHAN_HALF; | |
226 | else if (status->flag & RX_FLAG_5MHZ) | |
227 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
228 | ||
601ae7f2 | 229 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 230 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 231 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 232 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 233 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 234 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 235 | else if (rate) |
a5e70697 | 236 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 237 | else |
a5e70697 SW |
238 | channel_flags |= IEEE80211_CHAN_2GHZ; |
239 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
240 | pos += 2; |
241 | ||
242 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
243 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
244 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
245 | *pos = status->signal; |
246 | rthdr->it_present |= | |
247 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
248 | pos++; | |
249 | } | |
250 | ||
601ae7f2 BR |
251 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
252 | ||
a144f378 JB |
253 | if (!status->chains) { |
254 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
255 | *pos = status->antenna; | |
256 | pos++; | |
257 | } | |
601ae7f2 | 258 | |
601ae7f2 BR |
259 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
260 | ||
261 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
262 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 263 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 264 | *pos++ = 0; |
aae89831 | 265 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
266 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
267 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 268 | pos += 2; |
6d744bac JB |
269 | |
270 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
271 | unsigned int stbc; |
272 | ||
6d744bac | 273 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 274 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
275 | *pos = 0; |
276 | if (status->flag & RX_FLAG_SHORT_GI) | |
277 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
278 | if (status->flag & RX_FLAG_40MHZ) | |
279 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
280 | if (status->flag & RX_FLAG_HT_GF) |
281 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
282 | if (status->flag & RX_FLAG_LDPC) |
283 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
284 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
285 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
286 | pos++; |
287 | *pos++ = status->rate_idx; | |
288 | } | |
4c298677 JB |
289 | |
290 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
291 | u16 flags = 0; | |
292 | ||
293 | /* ensure 4 byte alignment */ | |
294 | while ((pos - (u8 *)rthdr) & 3) | |
295 | pos++; | |
296 | rthdr->it_present |= | |
297 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
298 | put_unaligned_le32(status->ampdu_reference, pos); | |
299 | pos += 4; | |
300 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
301 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
302 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
303 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
304 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
305 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
306 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
307 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
308 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
309 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
310 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
311 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
312 | put_unaligned_le16(flags, pos); | |
313 | pos += 2; | |
314 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
315 | *pos++ = status->ampdu_delimiter_crc; | |
316 | else | |
317 | *pos++ = 0; | |
318 | *pos++ = 0; | |
319 | } | |
90b9e446 | 320 | |
51648921 JB |
321 | if (status->flag & RX_FLAG_VHT) { |
322 | u16 known = local->hw.radiotap_vht_details; | |
323 | ||
324 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
325 | /* known field - how to handle 80+80? */ | |
1b8d242a | 326 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 JB |
327 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
328 | put_unaligned_le16(known, pos); | |
329 | pos += 2; | |
330 | /* flags */ | |
331 | if (status->flag & RX_FLAG_SHORT_GI) | |
332 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
333 | /* in VHT, STBC is binary */ |
334 | if (status->flag & RX_FLAG_STBC_MASK) | |
335 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
336 | if (status->vht_flag & RX_VHT_FLAG_BF) |
337 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
338 | pos++; |
339 | /* bandwidth */ | |
1b8d242a | 340 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 341 | *pos++ = 4; |
1b8d242a | 342 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 | 343 | *pos++ = 0; /* marked not known above */ |
1b8d242a | 344 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
345 | *pos++ = 11; |
346 | else if (status->flag & RX_FLAG_40MHZ) | |
347 | *pos++ = 1; | |
348 | else /* 20 MHz */ | |
349 | *pos++ = 0; | |
350 | /* MCS/NSS */ | |
351 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
352 | pos += 4; | |
353 | /* coding field */ | |
63c361f5 EG |
354 | if (status->flag & RX_FLAG_LDPC) |
355 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
356 | pos++; |
357 | /* group ID */ | |
358 | pos++; | |
359 | /* partial_aid */ | |
360 | pos += 2; | |
361 | } | |
362 | ||
a144f378 JB |
363 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
364 | *pos++ = status->chain_signal[chain]; | |
365 | *pos++ = chain; | |
366 | } | |
601ae7f2 BR |
367 | } |
368 | ||
b2e7771e JB |
369 | /* |
370 | * This function copies a received frame to all monitor interfaces and | |
371 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
372 | * radiotap header the driver might have added. | |
373 | */ | |
374 | static struct sk_buff * | |
375 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 376 | struct ieee80211_rate *rate) |
b2e7771e | 377 | { |
f1d58c25 | 378 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 379 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 380 | int needed_headroom; |
b2e7771e JB |
381 | struct sk_buff *skb, *skb2; |
382 | struct net_device *prev_dev = NULL; | |
383 | int present_fcs_len = 0; | |
b2e7771e JB |
384 | |
385 | /* | |
386 | * First, we may need to make a copy of the skb because | |
387 | * (1) we need to modify it for radiotap (if not present), and | |
388 | * (2) the other RX handlers will modify the skb we got. | |
389 | * | |
390 | * We don't need to, of course, if we aren't going to return | |
391 | * the SKB because it has a bad FCS/PLCP checksum. | |
392 | */ | |
0869aea0 | 393 | |
b2e7771e JB |
394 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
395 | present_fcs_len = FCS_LEN; | |
396 | ||
0059b2b1 EG |
397 | /* ensure hdr->frame_control is in skb head */ |
398 | if (!pskb_may_pull(origskb, 2)) { | |
e3cf8b3f ZY |
399 | dev_kfree_skb(origskb); |
400 | return NULL; | |
401 | } | |
402 | ||
b2e7771e | 403 | if (!local->monitors) { |
0869aea0 | 404 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
405 | dev_kfree_skb(origskb); |
406 | return NULL; | |
407 | } | |
408 | ||
0869aea0 | 409 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
410 | } |
411 | ||
751413ea HS |
412 | /* room for the radiotap header based on driver features */ |
413 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
414 | ||
0869aea0 | 415 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
416 | /* only need to expand headroom if necessary */ |
417 | skb = origskb; | |
418 | origskb = NULL; | |
419 | ||
420 | /* | |
421 | * This shouldn't trigger often because most devices have an | |
422 | * RX header they pull before we get here, and that should | |
423 | * be big enough for our radiotap information. We should | |
424 | * probably export the length to drivers so that we can have | |
425 | * them allocate enough headroom to start with. | |
426 | */ | |
427 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 428 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
429 | dev_kfree_skb(skb); |
430 | return NULL; | |
431 | } | |
432 | } else { | |
433 | /* | |
434 | * Need to make a copy and possibly remove radiotap header | |
435 | * and FCS from the original. | |
436 | */ | |
437 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
438 | ||
0869aea0 | 439 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
440 | |
441 | if (!skb) | |
442 | return origskb; | |
443 | } | |
444 | ||
0869aea0 | 445 | /* prepend radiotap information */ |
973ef21a FF |
446 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
447 | true); | |
b2e7771e | 448 | |
ce3edf6d | 449 | skb_reset_mac_header(skb); |
b2e7771e JB |
450 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
451 | skb->pkt_type = PACKET_OTHERHOST; | |
452 | skb->protocol = htons(ETH_P_802_2); | |
453 | ||
454 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 455 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
456 | continue; |
457 | ||
3d30d949 MW |
458 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
459 | continue; | |
460 | ||
9607e6b6 | 461 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
462 | continue; |
463 | ||
b2e7771e JB |
464 | if (prev_dev) { |
465 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
466 | if (skb2) { | |
467 | skb2->dev = prev_dev; | |
5548a8a1 | 468 | netif_receive_skb(skb2); |
b2e7771e JB |
469 | } |
470 | } | |
471 | ||
472 | prev_dev = sdata->dev; | |
473 | sdata->dev->stats.rx_packets++; | |
474 | sdata->dev->stats.rx_bytes += skb->len; | |
475 | } | |
476 | ||
477 | if (prev_dev) { | |
478 | skb->dev = prev_dev; | |
5548a8a1 | 479 | netif_receive_skb(skb); |
b2e7771e JB |
480 | } else |
481 | dev_kfree_skb(skb); | |
482 | ||
483 | return origskb; | |
484 | } | |
485 | ||
5cf121c3 | 486 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 487 | { |
238f74a2 | 488 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 489 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 490 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
491 | |
492 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
493 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
494 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 495 | /* frame has qos control */ |
238f74a2 | 496 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 497 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 498 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
499 | |
500 | seqno_idx = tid; | |
501 | security_idx = tid; | |
6e0d114d | 502 | } else { |
1411f9b5 JB |
503 | /* |
504 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
505 | * | |
506 | * Sequence numbers for management frames, QoS data | |
507 | * frames with a broadcast/multicast address in the | |
508 | * Address 1 field, and all non-QoS data frames sent | |
509 | * by QoS STAs are assigned using an additional single | |
510 | * modulo-4096 counter, [...] | |
511 | * | |
512 | * We also use that counter for non-QoS STAs. | |
513 | */ | |
5a306f58 | 514 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
515 | security_idx = 0; |
516 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 517 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 518 | tid = 0; |
6e0d114d | 519 | } |
52865dfd | 520 | |
9e26297a JB |
521 | rx->seqno_idx = seqno_idx; |
522 | rx->security_idx = security_idx; | |
6e0d114d JB |
523 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
524 | * For now, set skb->priority to 0 for other cases. */ | |
525 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 526 | } |
6e0d114d | 527 | |
d1c3a37c JB |
528 | /** |
529 | * DOC: Packet alignment | |
530 | * | |
531 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
532 | * to the stack. | |
533 | * | |
534 | * Additionally, should, if possible, align the payload data in a way that | |
535 | * guarantees that the contained IP header is aligned to a four-byte | |
536 | * boundary. In the case of regular frames, this simply means aligning the | |
537 | * payload to a four-byte boundary (because either the IP header is directly | |
538 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
539 | * in front of it). If the payload data is not properly aligned and the |
540 | * architecture doesn't support efficient unaligned operations, mac80211 | |
541 | * will align the data. | |
d1c3a37c JB |
542 | * |
543 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
544 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
545 | * push the IP header further back to a multiple of four again. Thankfully, the | |
546 | * specs were sane enough this time around to require padding each A-MSDU | |
547 | * subframe to a length that is a multiple of four. | |
548 | * | |
25985edc | 549 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
550 | * the payload is not supported, the driver is required to move the 802.11 |
551 | * header to be directly in front of the payload in that case. | |
552 | */ | |
553 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 554 | { |
59d9cb07 KV |
555 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
556 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
557 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 558 | #endif |
6e0d114d JB |
559 | } |
560 | ||
6368e4b1 | 561 | |
571ecf67 JB |
562 | /* rx handlers */ |
563 | ||
3cfcf6ac JM |
564 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
565 | { | |
566 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
567 | ||
d8ca16db | 568 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
569 | return 0; |
570 | ||
d8ca16db | 571 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
572 | } |
573 | ||
574 | ||
575 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
576 | { | |
577 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
578 | ||
d8ca16db | 579 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
580 | return 0; |
581 | ||
d8ca16db | 582 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
583 | } |
584 | ||
585 | ||
586 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
587 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
588 | { | |
589 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
590 | struct ieee80211_mmie *mmie; | |
591 | ||
1df332e8 | 592 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
593 | return -1; |
594 | ||
d8ca16db | 595 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
596 | return -1; /* not a robust management frame */ |
597 | ||
598 | mmie = (struct ieee80211_mmie *) | |
599 | (skb->data + skb->len - sizeof(*mmie)); | |
600 | if (mmie->element_id != WLAN_EID_MMIE || | |
601 | mmie->length != sizeof(*mmie) - 2) | |
602 | return -1; | |
603 | ||
604 | return le16_to_cpu(mmie->key_id); | |
605 | } | |
606 | ||
2475b1cc MS |
607 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
608 | struct sk_buff *skb) | |
609 | { | |
610 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
611 | __le16 fc; | |
612 | int hdrlen; | |
613 | u8 keyid; | |
614 | ||
615 | fc = hdr->frame_control; | |
616 | hdrlen = ieee80211_hdrlen(fc); | |
617 | ||
618 | if (skb->len < hdrlen + cs->hdr_len) | |
619 | return -EINVAL; | |
620 | ||
621 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
622 | keyid &= cs->key_idx_mask; | |
623 | keyid >>= cs->key_idx_shift; | |
624 | ||
625 | return keyid; | |
626 | } | |
627 | ||
1df332e8 | 628 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 629 | { |
a7767f95 | 630 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 631 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 632 | |
a7767f95 | 633 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
634 | if (is_multicast_ether_addr(hdr->addr1)) { |
635 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 636 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 637 | return RX_DROP_MONITOR; |
b203ca39 | 638 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
639 | return RX_DROP_MONITOR; |
640 | } else { | |
641 | if (!ieee80211_has_a4(hdr->frame_control)) | |
642 | return RX_DROP_MONITOR; | |
b203ca39 | 643 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
644 | return RX_DROP_MONITOR; |
645 | } | |
33b64eb2 LCC |
646 | } |
647 | ||
648 | /* If there is not an established peer link and this is not a peer link | |
649 | * establisment frame, beacon or probe, drop the frame. | |
650 | */ | |
651 | ||
57cf8043 | 652 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 653 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 654 | |
a7767f95 | 655 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
656 | return RX_DROP_MONITOR; |
657 | ||
a7767f95 | 658 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 659 | u8 category; |
9b395bc3 JB |
660 | |
661 | /* make sure category field is present */ | |
662 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
663 | return RX_DROP_MONITOR; | |
664 | ||
33b64eb2 | 665 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
666 | category = mgmt->u.action.category; |
667 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 668 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 669 | return RX_DROP_MONITOR; |
33b64eb2 | 670 | return RX_CONTINUE; |
33b64eb2 LCC |
671 | } |
672 | ||
a7767f95 HH |
673 | if (ieee80211_is_probe_req(hdr->frame_control) || |
674 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
675 | ieee80211_is_beacon(hdr->frame_control) || |
676 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
677 | return RX_CONTINUE; |
678 | ||
679 | return RX_DROP_MONITOR; | |
a7767f95 HH |
680 | } |
681 | ||
902acc78 JB |
682 | return RX_CONTINUE; |
683 | } | |
33b64eb2 | 684 | |
d3b2fb53 | 685 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 686 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
687 | int index, |
688 | struct sk_buff_head *frames) | |
1edfb1af | 689 | { |
1edfb1af | 690 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 691 | struct ieee80211_rx_status *status; |
1edfb1af | 692 | |
dd318575 JB |
693 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
694 | ||
1edfb1af JB |
695 | if (!skb) |
696 | goto no_frame; | |
697 | ||
071d9ac2 | 698 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
699 | tid_agg_rx->stored_mpdu_num--; |
700 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
701 | status = IEEE80211_SKB_RXCB(skb); |
702 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
f9e124fb | 703 | __skb_queue_tail(frames, skb); |
1edfb1af JB |
704 | |
705 | no_frame: | |
9a886586 | 706 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
707 | } |
708 | ||
d3b2fb53 | 709 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 710 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
711 | u16 head_seq_num, |
712 | struct sk_buff_head *frames) | |
1edfb1af JB |
713 | { |
714 | int index; | |
715 | ||
dd318575 JB |
716 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
717 | ||
9a886586 | 718 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 719 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
720 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
721 | frames); | |
1edfb1af JB |
722 | } |
723 | } | |
724 | ||
725 | /* | |
726 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
727 | * the skb was added to the buffer longer than this time ago, the earlier | |
728 | * frames that have not yet been received are assumed to be lost and the skb | |
729 | * can be released for processing. This may also release other skb's from the | |
730 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
731 | * |
732 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
733 | */ |
734 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
735 | ||
d3b2fb53 | 736 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
737 | struct tid_ampdu_rx *tid_agg_rx, |
738 | struct sk_buff_head *frames) | |
aa0c8636 | 739 | { |
2bff8ebf | 740 | int index, j; |
aa0c8636 | 741 | |
dd318575 JB |
742 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
743 | ||
aa0c8636 | 744 | /* release the buffer until next missing frame */ |
2e3049b7 | 745 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 746 | if (!tid_agg_rx->reorder_buf[index] && |
07ae2dfc | 747 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
748 | /* |
749 | * No buffers ready to be released, but check whether any | |
750 | * frames in the reorder buffer have timed out. | |
751 | */ | |
aa0c8636 CL |
752 | int skipped = 1; |
753 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
754 | j = (j + 1) % tid_agg_rx->buf_size) { | |
755 | if (!tid_agg_rx->reorder_buf[j]) { | |
756 | skipped++; | |
757 | continue; | |
758 | } | |
499fe9a4 DH |
759 | if (skipped && |
760 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 761 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 762 | goto set_release_timer; |
aa0c8636 | 763 | |
bdcbd8e0 JB |
764 | ht_dbg_ratelimited(sdata, |
765 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
766 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
767 | frames); | |
aa0c8636 CL |
768 | |
769 | /* | |
770 | * Increment the head seq# also for the skipped slots. | |
771 | */ | |
772 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
773 | (tid_agg_rx->head_seq_num + |
774 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
775 | skipped = 0; |
776 | } | |
777 | } else while (tid_agg_rx->reorder_buf[index]) { | |
f9e124fb CL |
778 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
779 | frames); | |
2e3049b7 | 780 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 781 | } |
2bff8ebf CL |
782 | |
783 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 784 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
785 | |
786 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
787 | j = (j + 1) % tid_agg_rx->buf_size) { | |
788 | if (tid_agg_rx->reorder_buf[j]) | |
789 | break; | |
790 | } | |
791 | ||
792 | set_release_timer: | |
793 | ||
794 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 795 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
796 | HT_RX_REORDER_BUF_TIMEOUT); |
797 | } else { | |
798 | del_timer(&tid_agg_rx->reorder_timer); | |
799 | } | |
aa0c8636 CL |
800 | } |
801 | ||
1edfb1af JB |
802 | /* |
803 | * As this function belongs to the RX path it must be under | |
804 | * rcu_read_lock protection. It returns false if the frame | |
805 | * can be processed immediately, true if it was consumed. | |
806 | */ | |
d3b2fb53 | 807 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 808 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
809 | struct sk_buff *skb, |
810 | struct sk_buff_head *frames) | |
1edfb1af JB |
811 | { |
812 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
813 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
814 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
815 | u16 head_seq_num, buf_size; | |
816 | int index; | |
2bff8ebf | 817 | bool ret = true; |
1edfb1af | 818 | |
dd318575 JB |
819 | spin_lock(&tid_agg_rx->reorder_lock); |
820 | ||
1edfb1af JB |
821 | buf_size = tid_agg_rx->buf_size; |
822 | head_seq_num = tid_agg_rx->head_seq_num; | |
823 | ||
824 | /* frame with out of date sequence number */ | |
9a886586 | 825 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 826 | dev_kfree_skb(skb); |
2bff8ebf | 827 | goto out; |
1edfb1af JB |
828 | } |
829 | ||
830 | /* | |
831 | * If frame the sequence number exceeds our buffering window | |
832 | * size release some previous frames to make room for this one. | |
833 | */ | |
9a886586 JB |
834 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
835 | head_seq_num = ieee80211_sn_inc( | |
836 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 837 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 838 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 839 | head_seq_num, frames); |
1edfb1af JB |
840 | } |
841 | ||
842 | /* Now the new frame is always in the range of the reordering buffer */ | |
843 | ||
2e3049b7 | 844 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
845 | |
846 | /* check if we already stored this frame */ | |
847 | if (tid_agg_rx->reorder_buf[index]) { | |
848 | dev_kfree_skb(skb); | |
2bff8ebf | 849 | goto out; |
1edfb1af JB |
850 | } |
851 | ||
852 | /* | |
853 | * If the current MPDU is in the right order and nothing else | |
854 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
855 | * If it is first but there's something stored, we may be able |
856 | * to release frames after this one. | |
1edfb1af JB |
857 | */ |
858 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
859 | tid_agg_rx->stored_mpdu_num == 0) { | |
9a886586 JB |
860 | tid_agg_rx->head_seq_num = |
861 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
862 | ret = false; |
863 | goto out; | |
1edfb1af JB |
864 | } |
865 | ||
866 | /* put the frame in the reordering buffer */ | |
867 | tid_agg_rx->reorder_buf[index] = skb; | |
868 | tid_agg_rx->reorder_time[index] = jiffies; | |
869 | tid_agg_rx->stored_mpdu_num++; | |
f9e124fb | 870 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
1edfb1af | 871 | |
2bff8ebf CL |
872 | out: |
873 | spin_unlock(&tid_agg_rx->reorder_lock); | |
874 | return ret; | |
1edfb1af JB |
875 | } |
876 | ||
877 | /* | |
878 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
879 | * true if the MPDU was buffered, false if it should be processed. | |
880 | */ | |
f9e124fb CL |
881 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
882 | struct sk_buff_head *frames) | |
1edfb1af | 883 | { |
2569a826 JB |
884 | struct sk_buff *skb = rx->skb; |
885 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 886 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 887 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 888 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
889 | struct tid_ampdu_rx *tid_agg_rx; |
890 | u16 sc; | |
6cc00d54 | 891 | u8 tid, ack_policy; |
1edfb1af | 892 | |
051a41fa JB |
893 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
894 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 895 | goto dont_reorder; |
1edfb1af JB |
896 | |
897 | /* | |
898 | * filter the QoS data rx stream according to | |
899 | * STA/TID and check if this STA/TID is on aggregation | |
900 | */ | |
901 | ||
1edfb1af | 902 | if (!sta) |
2569a826 | 903 | goto dont_reorder; |
1edfb1af | 904 | |
6cc00d54 TP |
905 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
906 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
907 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
908 | ||
a87f736d JB |
909 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
910 | if (!tid_agg_rx) | |
911 | goto dont_reorder; | |
1edfb1af JB |
912 | |
913 | /* qos null data frames are excluded */ | |
914 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 915 | goto dont_reorder; |
1edfb1af | 916 | |
6cc00d54 TP |
917 | /* not part of a BA session */ |
918 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
919 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
920 | goto dont_reorder; | |
921 | ||
660c6a44 TP |
922 | /* not actually part of this BA session */ |
923 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
924 | goto dont_reorder; | |
925 | ||
1edfb1af JB |
926 | /* new, potentially un-ordered, ampdu frame - process it */ |
927 | ||
928 | /* reset session timer */ | |
929 | if (tid_agg_rx->timeout) | |
12d3952f | 930 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
931 | |
932 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
933 | sc = le16_to_cpu(hdr->seq_ctrl); | |
934 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 935 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
936 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
937 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 938 | return; |
1edfb1af JB |
939 | } |
940 | ||
a87f736d JB |
941 | /* |
942 | * No locking needed -- we will only ever process one | |
943 | * RX packet at a time, and thus own tid_agg_rx. All | |
944 | * other code manipulating it needs to (and does) make | |
945 | * sure that we cannot get to it any more before doing | |
946 | * anything with it. | |
947 | */ | |
f9e124fb CL |
948 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
949 | frames)) | |
2569a826 JB |
950 | return; |
951 | ||
952 | dont_reorder: | |
f9e124fb | 953 | __skb_queue_tail(frames, skb); |
1edfb1af | 954 | } |
33b64eb2 | 955 | |
49461622 | 956 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 957 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 958 | { |
a7767f95 | 959 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 960 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 961 | |
6b0f3274 JB |
962 | /* |
963 | * Drop duplicate 802.11 retransmissions | |
964 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
965 | */ | |
966 | if (rx->skb->len >= 24 && rx->sta && | |
967 | !ieee80211_is_ctl(hdr->frame_control) && | |
968 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && | |
969 | !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 970 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 971 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 972 | hdr->seq_ctrl)) { |
554891e6 | 973 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
974 | rx->local->dot11FrameDuplicateCount++; |
975 | rx->sta->num_duplicates++; | |
976 | } | |
b1f93314 | 977 | return RX_DROP_UNUSABLE; |
0cfcefef | 978 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 979 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 980 | } |
571ecf67 JB |
981 | } |
982 | ||
571ecf67 JB |
983 | if (unlikely(rx->skb->len < 16)) { |
984 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 985 | return RX_DROP_MONITOR; |
571ecf67 JB |
986 | } |
987 | ||
571ecf67 JB |
988 | /* Drop disallowed frame classes based on STA auth/assoc state; |
989 | * IEEE 802.11, Chap 5.5. | |
990 | * | |
ccd7b362 JB |
991 | * mac80211 filters only based on association state, i.e. it drops |
992 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
993 | * deauth/disassoc frames when needed. In addition, hostapd is |
994 | * responsible for filtering on both auth and assoc states. | |
995 | */ | |
33b64eb2 | 996 | |
902acc78 | 997 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 998 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 999 | |
a7767f95 HH |
1000 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1001 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1002 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1003 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 1004 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1005 | /* |
1006 | * accept port control frames from the AP even when it's not | |
1007 | * yet marked ASSOC to prevent a race where we don't set the | |
1008 | * assoc bit quickly enough before it sends the first frame | |
1009 | */ | |
1010 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1011 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1012 | unsigned int hdrlen; |
1013 | __be16 ethertype; | |
1014 | ||
1015 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1016 | ||
1017 | if (rx->skb->len < hdrlen + 8) | |
1018 | return RX_DROP_MONITOR; | |
1019 | ||
1020 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1021 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1022 | return RX_CONTINUE; |
1023 | } | |
21fc7560 JB |
1024 | |
1025 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1026 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1027 | hdr->addr2, | |
1028 | GFP_ATOMIC)) | |
1029 | return RX_DROP_UNUSABLE; | |
1030 | ||
e4c26add | 1031 | return RX_DROP_MONITOR; |
2a33bee2 | 1032 | } |
571ecf67 | 1033 | |
9ae54c84 | 1034 | return RX_CONTINUE; |
570bd537 JB |
1035 | } |
1036 | ||
1037 | ||
572e0012 KV |
1038 | static ieee80211_rx_result debug_noinline |
1039 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1040 | { | |
1041 | struct ieee80211_local *local; | |
1042 | struct ieee80211_hdr *hdr; | |
1043 | struct sk_buff *skb; | |
1044 | ||
1045 | local = rx->local; | |
1046 | skb = rx->skb; | |
1047 | hdr = (struct ieee80211_hdr *) skb->data; | |
1048 | ||
1049 | if (!local->pspolling) | |
1050 | return RX_CONTINUE; | |
1051 | ||
1052 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1053 | /* this is not from AP */ | |
1054 | return RX_CONTINUE; | |
1055 | ||
1056 | if (!ieee80211_is_data(hdr->frame_control)) | |
1057 | return RX_CONTINUE; | |
1058 | ||
1059 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1060 | /* AP has no more frames buffered for us */ | |
1061 | local->pspolling = false; | |
1062 | return RX_CONTINUE; | |
1063 | } | |
1064 | ||
1065 | /* more data bit is set, let's request a new frame from the AP */ | |
1066 | ieee80211_send_pspoll(local, rx->sdata); | |
1067 | ||
1068 | return RX_CONTINUE; | |
1069 | } | |
1070 | ||
d012a605 | 1071 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1072 | { |
133b8226 | 1073 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1074 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1075 | struct ps_data *ps; |
0795af57 | 1076 | |
d012a605 MP |
1077 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1078 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1079 | ps = &sdata->bss->ps; | |
1080 | else | |
1081 | return; | |
1082 | ||
1083 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1084 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1085 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1086 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1087 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1088 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1089 | } |
1090 | ||
d012a605 | 1091 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1092 | { |
bdcbd8e0 JB |
1093 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1094 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1095 | |
c2c98fde | 1096 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1097 | /* |
1098 | * Clear the flag only if the other one is still set | |
1099 | * so that the TX path won't start TX'ing new frames | |
1100 | * directly ... In the case that the driver flag isn't | |
1101 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1102 | */ | |
1103 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1104 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1105 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1106 | return; |
1107 | } | |
1108 | ||
1109 | ieee80211_sta_ps_deliver_wakeup(sta); | |
571ecf67 JB |
1110 | } |
1111 | ||
d057e5a3 AN |
1112 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1113 | { | |
1114 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1115 | bool in_ps; | |
1116 | ||
1117 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1118 | ||
1119 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1120 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1121 | if ((start && in_ps) || (!start && !in_ps)) |
1122 | return -EINVAL; | |
1123 | ||
1124 | if (start) | |
d012a605 | 1125 | sta_ps_start(sta_inf); |
d057e5a3 | 1126 | else |
d012a605 | 1127 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1128 | |
1129 | return 0; | |
1130 | } | |
1131 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1132 | ||
47086fc5 JB |
1133 | static ieee80211_rx_result debug_noinline |
1134 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1135 | { | |
1136 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1137 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1138 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1139 | int tid, ac; | |
1140 | ||
1141 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1142 | return RX_CONTINUE; | |
1143 | ||
1144 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1145 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1146 | return RX_CONTINUE; | |
1147 | ||
1148 | /* | |
1149 | * The device handles station powersave, so don't do anything about | |
1150 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1151 | * it to mac80211 since they're handled.) | |
1152 | */ | |
1153 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1154 | return RX_CONTINUE; | |
1155 | ||
1156 | /* | |
1157 | * Don't do anything if the station isn't already asleep. In | |
1158 | * the uAPSD case, the station will probably be marked asleep, | |
1159 | * in the PS-Poll case the station must be confused ... | |
1160 | */ | |
c2c98fde | 1161 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1162 | return RX_CONTINUE; |
1163 | ||
1164 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1165 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1166 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1167 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1168 | else | |
c2c98fde | 1169 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1170 | } |
47086fc5 JB |
1171 | |
1172 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1173 | * count as an dropped frame. */ | |
1174 | dev_kfree_skb(rx->skb); | |
1175 | ||
1176 | return RX_QUEUED; | |
1177 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1178 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1179 | ieee80211_has_pm(hdr->frame_control) && | |
1180 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1181 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1182 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1183 | ac = ieee802_1d_to_ac[tid & 7]; | |
1184 | ||
1185 | /* | |
1186 | * If this AC is not trigger-enabled do nothing. | |
1187 | * | |
1188 | * NB: This could/should check a separate bitmap of trigger- | |
1189 | * enabled queues, but for now we only implement uAPSD w/o | |
1190 | * TSPEC changes to the ACs, so they're always the same. | |
1191 | */ | |
1192 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1193 | return RX_CONTINUE; | |
1194 | ||
1195 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1196 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1197 | return RX_CONTINUE; |
1198 | ||
c2c98fde | 1199 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1200 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1201 | else | |
c2c98fde | 1202 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1203 | } |
1204 | ||
1205 | return RX_CONTINUE; | |
1206 | } | |
1207 | ||
49461622 | 1208 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1209 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1210 | { |
1211 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1212 | struct sk_buff *skb = rx->skb; |
1213 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1214 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1215 | int i; |
571ecf67 JB |
1216 | |
1217 | if (!sta) | |
9ae54c84 | 1218 | return RX_CONTINUE; |
571ecf67 | 1219 | |
b291ba11 JB |
1220 | /* |
1221 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1222 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1223 | * current IBSS network alive in cases where other STAs start | |
1224 | * using different BSSID. This will also give the station another | |
1225 | * chance to restart the authentication/authorization in case | |
1226 | * something went wrong the first time. | |
b291ba11 | 1227 | */ |
05c914fe | 1228 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1229 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1230 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1231 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1232 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1233 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1234 | if (ieee80211_is_data(hdr->frame_control) && |
1235 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1236 | sta->last_rx_rate_idx = status->rate_idx; |
1237 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1238 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1239 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1240 | } |
1241 | } | |
b291ba11 JB |
1242 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1243 | /* | |
33b64eb2 LCC |
1244 | * Mesh beacons will update last_rx when if they are found to |
1245 | * match the current local configuration when processed. | |
571ecf67 | 1246 | */ |
b291ba11 | 1247 | sta->last_rx = jiffies; |
3af6334c FF |
1248 | if (ieee80211_is_data(hdr->frame_control)) { |
1249 | sta->last_rx_rate_idx = status->rate_idx; | |
1250 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1251 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1252 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1253 | } |
571ecf67 JB |
1254 | } |
1255 | ||
554891e6 | 1256 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1257 | return RX_CONTINUE; |
571ecf67 | 1258 | |
3cf335d5 KV |
1259 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1260 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1261 | ||
571ecf67 JB |
1262 | sta->rx_fragments++; |
1263 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1264 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1265 | sta->last_signal = status->signal; | |
1266 | ewma_add(&sta->avg_signal, -status->signal); | |
1267 | } | |
571ecf67 | 1268 | |
ef0621e8 FF |
1269 | if (status->chains) { |
1270 | sta->chains = status->chains; | |
1271 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1272 | int signal = status->chain_signal[i]; | |
1273 | ||
1274 | if (!(status->chains & BIT(i))) | |
1275 | continue; | |
1276 | ||
1277 | sta->chain_signal_last[i] = signal; | |
1278 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1279 | } | |
1280 | } | |
1281 | ||
72eaa43a JB |
1282 | /* |
1283 | * Change STA power saving mode only at the end of a frame | |
1284 | * exchange sequence. | |
1285 | */ | |
d057e5a3 AN |
1286 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1287 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1288 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1289 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1290 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1291 | /* PM bit is only checked in frames where it isn't reserved, | |
1292 | * in AP mode it's reserved in non-bufferable management frames | |
1293 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1294 | */ | |
1295 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1296 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1297 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1298 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1299 | sta_ps_end(sta); |
72eaa43a JB |
1300 | } else { |
1301 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1302 | sta_ps_start(sta); |
72eaa43a | 1303 | } |
571ecf67 JB |
1304 | } |
1305 | ||
3f52b7e3 MP |
1306 | /* mesh power save support */ |
1307 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1308 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1309 | ||
22403def JB |
1310 | /* |
1311 | * Drop (qos-)data::nullfunc frames silently, since they | |
1312 | * are used only to control station power saving mode. | |
1313 | */ | |
1314 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1315 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1316 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1317 | |
1318 | /* | |
1319 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1320 | * that was not moved to a 4-addr STA vlan yet send |
1321 | * the event to userspace and for older hostapd drop | |
1322 | * the frame to the monitor interface. | |
d524215f FF |
1323 | */ |
1324 | if (ieee80211_has_a4(hdr->frame_control) && | |
1325 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1326 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1327 | !rx->sdata->u.vlan.sta))) { |
1328 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1329 | cfg80211_rx_unexpected_4addr_frame( | |
1330 | rx->sdata->dev, sta->sta.addr, | |
1331 | GFP_ATOMIC); | |
d524215f | 1332 | return RX_DROP_MONITOR; |
e7f4a940 | 1333 | } |
22403def JB |
1334 | /* |
1335 | * Update counter and free packet here to avoid | |
1336 | * counting this as a dropped packed. | |
1337 | */ | |
571ecf67 JB |
1338 | sta->rx_packets++; |
1339 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1340 | return RX_QUEUED; |
571ecf67 JB |
1341 | } |
1342 | ||
9ae54c84 | 1343 | return RX_CONTINUE; |
571ecf67 JB |
1344 | } /* ieee80211_rx_h_sta_process */ |
1345 | ||
86c228a7 JA |
1346 | static ieee80211_rx_result debug_noinline |
1347 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1348 | { | |
1349 | struct sk_buff *skb = rx->skb; | |
1350 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1351 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1352 | int keyidx; | |
1353 | int hdrlen; | |
1354 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1355 | struct ieee80211_key *sta_ptk = NULL; | |
1356 | int mmie_keyidx = -1; | |
1357 | __le16 fc; | |
2475b1cc | 1358 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1359 | |
1360 | /* | |
1361 | * Key selection 101 | |
1362 | * | |
1363 | * There are four types of keys: | |
1364 | * - GTK (group keys) | |
1365 | * - IGTK (group keys for management frames) | |
1366 | * - PTK (pairwise keys) | |
1367 | * - STK (station-to-station pairwise keys) | |
1368 | * | |
1369 | * When selecting a key, we have to distinguish between multicast | |
1370 | * (including broadcast) and unicast frames, the latter can only | |
1371 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1372 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1373 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1374 | * don't have a PTK/STK we check the key index for a WEP key. | |
1375 | * | |
1376 | * Note that in a regular BSS, multicast frames are sent by the | |
1377 | * AP only, associated stations unicast the frame to the AP first | |
1378 | * which then multicasts it on their behalf. | |
1379 | * | |
1380 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1381 | * with each station, that is something we don't currently handle. | |
1382 | * The spec seems to expect that one negotiates the same key with | |
1383 | * every station but there's no such requirement; VLANs could be | |
1384 | * possible. | |
1385 | */ | |
1386 | ||
1387 | /* | |
1388 | * No point in finding a key and decrypting if the frame is neither | |
1389 | * addressed to us nor a multicast frame. | |
1390 | */ | |
1391 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1392 | return RX_CONTINUE; | |
1393 | ||
1394 | /* start without a key */ | |
1395 | rx->key = NULL; | |
2475b1cc | 1396 | fc = hdr->frame_control; |
86c228a7 | 1397 | |
2475b1cc MS |
1398 | if (rx->sta) { |
1399 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1400 | |
2475b1cc MS |
1401 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1402 | cs = rx->sta->cipher_scheme; | |
1403 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1404 | if (unlikely(keyid < 0)) | |
1405 | return RX_DROP_UNUSABLE; | |
1406 | } | |
1407 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1408 | } | |
86c228a7 JA |
1409 | |
1410 | if (!ieee80211_has_protected(fc)) | |
1411 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1412 | ||
1413 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1414 | rx->key = sta_ptk; | |
1415 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1416 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1417 | return RX_CONTINUE; | |
1418 | /* Skip decryption if the frame is not protected. */ | |
1419 | if (!ieee80211_has_protected(fc)) | |
1420 | return RX_CONTINUE; | |
1421 | } else if (mmie_keyidx >= 0) { | |
1422 | /* Broadcast/multicast robust management frame / BIP */ | |
1423 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1424 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1425 | return RX_CONTINUE; | |
1426 | ||
1427 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1428 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1429 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1430 | if (rx->sta) | |
1431 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1432 | if (!rx->key) | |
1433 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1434 | } else if (!ieee80211_has_protected(fc)) { | |
1435 | /* | |
1436 | * The frame was not protected, so skip decryption. However, we | |
1437 | * need to set rx->key if there is a key that could have been | |
1438 | * used so that the frame may be dropped if encryption would | |
1439 | * have been expected. | |
1440 | */ | |
1441 | struct ieee80211_key *key = NULL; | |
1442 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1443 | int i; | |
1444 | ||
1445 | if (ieee80211_is_mgmt(fc) && | |
1446 | is_multicast_ether_addr(hdr->addr1) && | |
1447 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1448 | rx->key = key; | |
1449 | else { | |
1450 | if (rx->sta) { | |
1451 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1452 | key = rcu_dereference(rx->sta->gtk[i]); | |
1453 | if (key) | |
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | if (!key) { | |
1458 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1459 | key = rcu_dereference(sdata->keys[i]); | |
1460 | if (key) | |
1461 | break; | |
1462 | } | |
1463 | } | |
1464 | if (key) | |
1465 | rx->key = key; | |
1466 | } | |
1467 | return RX_CONTINUE; | |
1468 | } else { | |
1469 | u8 keyid; | |
2475b1cc | 1470 | |
86c228a7 JA |
1471 | /* |
1472 | * The device doesn't give us the IV so we won't be | |
1473 | * able to look up the key. That's ok though, we | |
1474 | * don't need to decrypt the frame, we just won't | |
1475 | * be able to keep statistics accurate. | |
1476 | * Except for key threshold notifications, should | |
1477 | * we somehow allow the driver to tell us which key | |
1478 | * the hardware used if this flag is set? | |
1479 | */ | |
1480 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1481 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1482 | return RX_CONTINUE; | |
1483 | ||
1484 | hdrlen = ieee80211_hdrlen(fc); | |
1485 | ||
2475b1cc MS |
1486 | if (cs) { |
1487 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1488 | |
2475b1cc MS |
1489 | if (unlikely(keyidx < 0)) |
1490 | return RX_DROP_UNUSABLE; | |
1491 | } else { | |
1492 | if (rx->skb->len < 8 + hdrlen) | |
1493 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1494 | /* | |
1495 | * no need to call ieee80211_wep_get_keyidx, | |
1496 | * it verifies a bunch of things we've done already | |
1497 | */ | |
1498 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1499 | keyidx = keyid >> 6; | |
1500 | } | |
86c228a7 JA |
1501 | |
1502 | /* check per-station GTK first, if multicast packet */ | |
1503 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1504 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1505 | ||
1506 | /* if not found, try default key */ | |
1507 | if (!rx->key) { | |
1508 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1509 | ||
1510 | /* | |
1511 | * RSNA-protected unicast frames should always be | |
1512 | * sent with pairwise or station-to-station keys, | |
1513 | * but for WEP we allow using a key index as well. | |
1514 | */ | |
1515 | if (rx->key && | |
1516 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1517 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1518 | !is_multicast_ether_addr(hdr->addr1)) | |
1519 | rx->key = NULL; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | if (rx->key) { | |
1524 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1525 | return RX_DROP_MONITOR; | |
1526 | ||
1527 | rx->key->tx_rx_count++; | |
1528 | /* TODO: add threshold stuff again */ | |
1529 | } else { | |
1530 | return RX_DROP_MONITOR; | |
1531 | } | |
1532 | ||
1533 | switch (rx->key->conf.cipher) { | |
1534 | case WLAN_CIPHER_SUITE_WEP40: | |
1535 | case WLAN_CIPHER_SUITE_WEP104: | |
1536 | result = ieee80211_crypto_wep_decrypt(rx); | |
1537 | break; | |
1538 | case WLAN_CIPHER_SUITE_TKIP: | |
1539 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1540 | break; | |
1541 | case WLAN_CIPHER_SUITE_CCMP: | |
1542 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1543 | break; | |
1544 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1545 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1546 | break; | |
1547 | default: | |
2475b1cc | 1548 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1549 | } |
1550 | ||
1551 | /* the hdr variable is invalid after the decrypt handlers */ | |
1552 | ||
1553 | /* either the frame has been decrypted or will be dropped */ | |
1554 | status->flag |= RX_FLAG_DECRYPTED; | |
1555 | ||
1556 | return result; | |
1557 | } | |
1558 | ||
571ecf67 JB |
1559 | static inline struct ieee80211_fragment_entry * |
1560 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1561 | unsigned int frag, unsigned int seq, int rx_queue, | |
1562 | struct sk_buff **skb) | |
1563 | { | |
1564 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1565 | |
571ecf67 JB |
1566 | entry = &sdata->fragments[sdata->fragment_next++]; |
1567 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1568 | sdata->fragment_next = 0; | |
1569 | ||
bdcbd8e0 | 1570 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1571 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1572 | |
1573 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1574 | *skb = NULL; | |
1575 | entry->first_frag_time = jiffies; | |
1576 | entry->seq = seq; | |
1577 | entry->rx_queue = rx_queue; | |
1578 | entry->last_frag = frag; | |
1579 | entry->ccmp = 0; | |
1580 | entry->extra_len = 0; | |
1581 | ||
1582 | return entry; | |
1583 | } | |
1584 | ||
1585 | static inline struct ieee80211_fragment_entry * | |
1586 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1587 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1588 | int rx_queue, struct ieee80211_hdr *hdr) |
1589 | { | |
1590 | struct ieee80211_fragment_entry *entry; | |
1591 | int i, idx; | |
1592 | ||
1593 | idx = sdata->fragment_next; | |
1594 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1595 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1596 | |
1597 | idx--; | |
1598 | if (idx < 0) | |
1599 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1600 | ||
1601 | entry = &sdata->fragments[idx]; | |
1602 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1603 | entry->rx_queue != rx_queue || | |
1604 | entry->last_frag + 1 != frag) | |
1605 | continue; | |
1606 | ||
b73d70ad | 1607 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1608 | |
b73d70ad HH |
1609 | /* |
1610 | * Check ftype and addresses are equal, else check next fragment | |
1611 | */ | |
1612 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1613 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1614 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1615 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1616 | continue; |
1617 | ||
ab46623e | 1618 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1619 | __skb_queue_purge(&entry->skb_list); |
1620 | continue; | |
1621 | } | |
1622 | return entry; | |
1623 | } | |
1624 | ||
1625 | return NULL; | |
1626 | } | |
1627 | ||
49461622 | 1628 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1629 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1630 | { |
1631 | struct ieee80211_hdr *hdr; | |
1632 | u16 sc; | |
358c8d9d | 1633 | __le16 fc; |
571ecf67 JB |
1634 | unsigned int frag, seq; |
1635 | struct ieee80211_fragment_entry *entry; | |
1636 | struct sk_buff *skb; | |
554891e6 | 1637 | struct ieee80211_rx_status *status; |
571ecf67 | 1638 | |
b73d70ad | 1639 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1640 | fc = hdr->frame_control; |
f7fbf70e JC |
1641 | |
1642 | if (ieee80211_is_ctl(fc)) | |
1643 | return RX_CONTINUE; | |
1644 | ||
571ecf67 JB |
1645 | sc = le16_to_cpu(hdr->seq_ctrl); |
1646 | frag = sc & IEEE80211_SCTL_FRAG; | |
1647 | ||
358c8d9d | 1648 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1649 | is_multicast_ether_addr(hdr->addr1))) { |
1650 | /* not fragmented */ | |
1651 | goto out; | |
1652 | } | |
1653 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1654 | ||
e3cf8b3f ZY |
1655 | if (skb_linearize(rx->skb)) |
1656 | return RX_DROP_UNUSABLE; | |
1657 | ||
058897a4 AK |
1658 | /* |
1659 | * skb_linearize() might change the skb->data and | |
1660 | * previously cached variables (in this case, hdr) need to | |
1661 | * be refreshed with the new data. | |
1662 | */ | |
1663 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1664 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1665 | ||
1666 | if (frag == 0) { | |
1667 | /* This is the first fragment of a new frame. */ | |
1668 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1669 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1670 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1671 | ieee80211_has_protected(fc)) { |
9e26297a | 1672 | int queue = rx->security_idx; |
571ecf67 JB |
1673 | /* Store CCMP PN so that we can verify that the next |
1674 | * fragment has a sequential PN value. */ | |
1675 | entry->ccmp = 1; | |
1676 | memcpy(entry->last_pn, | |
9190252c | 1677 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1678 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1679 | } |
9ae54c84 | 1680 | return RX_QUEUED; |
571ecf67 JB |
1681 | } |
1682 | ||
1683 | /* This is a fragment for a frame that should already be pending in | |
1684 | * fragment cache. Add this fragment to the end of the pending entry. | |
1685 | */ | |
9e26297a JB |
1686 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1687 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1688 | if (!entry) { |
1689 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1690 | return RX_DROP_MONITOR; |
571ecf67 JB |
1691 | } |
1692 | ||
1693 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1694 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1695 | if (entry->ccmp) { | |
1696 | int i; | |
4325f6ca | 1697 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1698 | int queue; |
97359d12 | 1699 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1700 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1701 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1702 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1703 | pn[i]++; |
1704 | if (pn[i]) | |
1705 | break; | |
1706 | } | |
9e26297a | 1707 | queue = rx->security_idx; |
9190252c | 1708 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1709 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1710 | return RX_DROP_UNUSABLE; |
4325f6ca | 1711 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1712 | } |
1713 | ||
358c8d9d | 1714 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1715 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1716 | entry->last_frag = frag; | |
1717 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1718 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1719 | rx->skb = NULL; |
9ae54c84 | 1720 | return RX_QUEUED; |
571ecf67 JB |
1721 | } |
1722 | ||
1723 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1724 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1725 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1726 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1727 | GFP_ATOMIC))) { | |
1728 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1729 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1730 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1731 | } |
1732 | } | |
1733 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1734 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1735 | dev_kfree_skb(skb); | |
1736 | } | |
1737 | ||
1738 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1739 | status = IEEE80211_SKB_RXCB(rx->skb); |
1740 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1741 | |
1742 | out: | |
1743 | if (rx->sta) | |
1744 | rx->sta->rx_packets++; | |
1745 | if (is_multicast_ether_addr(hdr->addr1)) | |
1746 | rx->local->dot11MulticastReceivedFrameCount++; | |
1747 | else | |
1748 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1749 | return RX_CONTINUE; |
571ecf67 JB |
1750 | } |
1751 | ||
1df332e8 | 1752 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1753 | { |
1df332e8 | 1754 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1755 | return -EACCES; |
571ecf67 | 1756 | |
76ee65bf | 1757 | return 0; |
571ecf67 JB |
1758 | } |
1759 | ||
1df332e8 | 1760 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1761 | { |
eb9fb5b8 JB |
1762 | struct sk_buff *skb = rx->skb; |
1763 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1764 | ||
3017b80b | 1765 | /* |
7848ba7d JB |
1766 | * Pass through unencrypted frames if the hardware has |
1767 | * decrypted them already. | |
3017b80b | 1768 | */ |
eb9fb5b8 | 1769 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1770 | return 0; |
571ecf67 JB |
1771 | |
1772 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1773 | if (unlikely(!ieee80211_has_protected(fc) && |
1774 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1775 | ieee80211_is_data(fc) && |
b3fc9c6c | 1776 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1777 | return -EACCES; |
bef5d1c7 JB |
1778 | |
1779 | return 0; | |
1780 | } | |
1781 | ||
1df332e8 | 1782 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1783 | { |
1784 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1785 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1786 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1787 | |
e3efca0a JM |
1788 | /* |
1789 | * Pass through unencrypted frames if the hardware has | |
1790 | * decrypted them already. | |
1791 | */ | |
1792 | if (status->flag & RX_FLAG_DECRYPTED) | |
1793 | return 0; | |
bef5d1c7 | 1794 | |
c2c98fde | 1795 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1796 | if (unlikely(!ieee80211_has_protected(fc) && |
1797 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1798 | rx->key)) { |
6ff57cf8 JB |
1799 | if (ieee80211_is_deauth(fc) || |
1800 | ieee80211_is_disassoc(fc)) | |
1801 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1802 | rx->skb->data, | |
1803 | rx->skb->len); | |
f2ca3ea4 | 1804 | return -EACCES; |
cf4e594e | 1805 | } |
f2ca3ea4 | 1806 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1807 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1808 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1809 | if (ieee80211_is_deauth(fc) || |
1810 | ieee80211_is_disassoc(fc)) | |
1811 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1812 | rx->skb->data, | |
1813 | rx->skb->len); | |
f2ca3ea4 | 1814 | return -EACCES; |
cf4e594e | 1815 | } |
f2ca3ea4 JM |
1816 | /* |
1817 | * When using MFP, Action frames are not allowed prior to | |
1818 | * having configured keys. | |
1819 | */ | |
1820 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1821 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1822 | return -EACCES; |
1823 | } | |
b3fc9c6c | 1824 | |
76ee65bf | 1825 | return 0; |
571ecf67 JB |
1826 | } |
1827 | ||
76ee65bf | 1828 | static int |
4114fa21 | 1829 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1830 | { |
eb9fb5b8 | 1831 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1832 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1833 | bool check_port_control = false; |
1834 | struct ethhdr *ehdr; | |
1835 | int ret; | |
f14543ee | 1836 | |
4114fa21 | 1837 | *port_control = false; |
9bc383de JB |
1838 | if (ieee80211_has_a4(hdr->frame_control) && |
1839 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1840 | return -1; |
9bc383de | 1841 | |
fbb327c5 FF |
1842 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1843 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1844 | ||
1845 | if (!sdata->u.mgd.use_4addr) | |
1846 | return -1; | |
1847 | else | |
1848 | check_port_control = true; | |
1849 | } | |
1850 | ||
9bc383de | 1851 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1852 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1853 | return -1; |
571ecf67 | 1854 | |
fbb327c5 | 1855 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1856 | if (ret < 0) |
fbb327c5 FF |
1857 | return ret; |
1858 | ||
1859 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1860 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1861 | *port_control = true; | |
1862 | else if (check_port_control) | |
fbb327c5 FF |
1863 | return -1; |
1864 | ||
1865 | return 0; | |
76ee65bf | 1866 | } |
571ecf67 | 1867 | |
ce3edf6d JB |
1868 | /* |
1869 | * requires that rx->skb is a frame with ethernet header | |
1870 | */ | |
358c8d9d | 1871 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1872 | { |
c97c23e3 | 1873 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1874 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1875 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1876 | ||
1877 | /* | |
1878 | * Allow EAPOL frames to us/the PAE group address regardless | |
1879 | * of whether the frame was encrypted or not. | |
1880 | */ | |
a621fa4d | 1881 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1882 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1883 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1884 | return true; |
1885 | ||
1886 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1887 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1888 | return false; |
1889 | ||
1890 | return true; | |
1891 | } | |
1892 | ||
1893 | /* | |
1894 | * requires that rx->skb is a frame with ethernet header | |
1895 | */ | |
76ee65bf | 1896 | static void |
5cf121c3 | 1897 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1898 | { |
eb9fb5b8 JB |
1899 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1900 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1901 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1902 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1903 | struct sta_info *dsta; | |
554891e6 | 1904 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1905 | |
76ee65bf RR |
1906 | skb = rx->skb; |
1907 | xmit_skb = NULL; | |
571ecf67 | 1908 | |
05c914fe JB |
1909 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1910 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1911 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1912 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1913 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1914 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1915 | /* | |
1916 | * send multicast frames both to higher layers in | |
1917 | * local net stack and back to the wireless medium | |
1918 | */ | |
76ee65bf | 1919 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1920 | if (!xmit_skb) |
bdcbd8e0 | 1921 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1922 | dev->name); |
571ecf67 | 1923 | } else { |
abe60632 JB |
1924 | dsta = sta_info_get(sdata, skb->data); |
1925 | if (dsta) { | |
ce3edf6d JB |
1926 | /* |
1927 | * The destination station is associated to | |
1928 | * this AP (in this VLAN), so send the frame | |
1929 | * directly to it and do not pass it to local | |
1930 | * net stack. | |
571ecf67 | 1931 | */ |
76ee65bf | 1932 | xmit_skb = skb; |
571ecf67 JB |
1933 | skb = NULL; |
1934 | } | |
571ecf67 JB |
1935 | } |
1936 | } | |
1937 | ||
59d9cb07 | 1938 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
1939 | if (skb) { |
1940 | /* 'align' will only take the values 0 or 2 here since all | |
1941 | * frames are required to be aligned to 2-byte boundaries | |
1942 | * when being passed to mac80211; the code here works just | |
1943 | * as well if that isn't true, but mac80211 assumes it can | |
1944 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 1945 | */ |
9e890a1f JB |
1946 | int align; |
1947 | ||
1948 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
1949 | if (align) { |
1950 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1951 | dev_kfree_skb(skb); | |
1952 | skb = NULL; | |
1953 | } else { | |
1954 | u8 *data = skb->data; | |
8ce0b589 ZY |
1955 | size_t len = skb_headlen(skb); |
1956 | skb->data -= align; | |
1957 | memmove(skb->data, data, len); | |
1958 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1959 | } |
1960 | } | |
9e890a1f | 1961 | } |
d1c3a37c JB |
1962 | #endif |
1963 | ||
9e890a1f JB |
1964 | if (skb) { |
1965 | /* deliver to local stack */ | |
1966 | skb->protocol = eth_type_trans(skb, dev); | |
1967 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
1968 | if (rx->local->napi) |
1969 | napi_gro_receive(rx->local->napi, skb); | |
1970 | else | |
1971 | netif_receive_skb(skb); | |
571ecf67 JB |
1972 | } |
1973 | ||
76ee65bf | 1974 | if (xmit_skb) { |
aef6c928 HS |
1975 | /* |
1976 | * Send to wireless media and increase priority by 256 to | |
1977 | * keep the received priority instead of reclassifying | |
1978 | * the frame (see cfg80211_classify8021d). | |
1979 | */ | |
1980 | xmit_skb->priority += 256; | |
f831e909 | 1981 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1982 | skb_reset_network_header(xmit_skb); |
1983 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1984 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1985 | } |
76ee65bf RR |
1986 | } |
1987 | ||
49461622 | 1988 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1989 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 1990 | { |
eb9fb5b8 | 1991 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 1992 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
1993 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1994 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 1995 | struct sk_buff_head frame_list; |
554891e6 | 1996 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 1997 | |
358c8d9d | 1998 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 1999 | return RX_CONTINUE; |
fd4c7f2f | 2000 | |
358c8d9d | 2001 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2002 | return RX_DROP_MONITOR; |
fd4c7f2f | 2003 | |
554891e6 | 2004 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2005 | return RX_CONTINUE; |
fd4c7f2f | 2006 | |
eaf85ca7 ZY |
2007 | if (ieee80211_has_a4(hdr->frame_control) && |
2008 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2009 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2010 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2011 | |
eaf85ca7 ZY |
2012 | if (is_multicast_ether_addr(hdr->addr1) && |
2013 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2014 | rx->sdata->u.vlan.sta) || | |
2015 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2016 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2017 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2018 | |
eaf85ca7 ZY |
2019 | skb->dev = dev; |
2020 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2021 | |
e3cf8b3f ZY |
2022 | if (skb_linearize(skb)) |
2023 | return RX_DROP_UNUSABLE; | |
2024 | ||
eaf85ca7 ZY |
2025 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2026 | rx->sdata->vif.type, | |
8b3becad | 2027 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2028 | |
eaf85ca7 ZY |
2029 | while (!skb_queue_empty(&frame_list)) { |
2030 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2031 | |
358c8d9d | 2032 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2033 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2034 | continue; |
2035 | } | |
eaf85ca7 ZY |
2036 | dev->stats.rx_packets++; |
2037 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2038 | |
2039 | ieee80211_deliver_skb(rx); | |
2040 | } | |
2041 | ||
9ae54c84 | 2042 | return RX_QUEUED; |
fd4c7f2f RR |
2043 | } |
2044 | ||
bf94e17b | 2045 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2046 | static ieee80211_rx_result |
e32f85f7 LCC |
2047 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2048 | { | |
30789eb6 TP |
2049 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2050 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2051 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2052 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2053 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2054 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2055 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2056 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2057 | u16 q, hdrlen; |
e32f85f7 LCC |
2058 | |
2059 | hdr = (struct ieee80211_hdr *) skb->data; | |
2060 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2061 | |
2062 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2063 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2064 | return RX_DROP_MONITOR; | |
2065 | ||
2066 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2067 | ||
2068 | /* make sure full mesh header is there, also checks skb len */ | |
2069 | if (!pskb_may_pull(rx->skb, | |
2070 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2071 | return RX_DROP_MONITOR; | |
2072 | ||
2073 | /* reload pointers */ | |
2074 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2075 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2076 | ||
2157fdd6 TP |
2077 | /* frame is in RMC, don't forward */ |
2078 | if (ieee80211_is_data(hdr->frame_control) && | |
2079 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2080 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2081 | return RX_DROP_MONITOR; |
2082 | ||
555cb715 JC |
2083 | if (!ieee80211_is_data(hdr->frame_control) || |
2084 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2085 | return RX_CONTINUE; |
2086 | ||
2087 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2088 | return RX_DROP_MONITOR; |
2089 | ||
43b7b314 | 2090 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2091 | struct mesh_path *mppath; |
43b7b314 JC |
2092 | char *proxied_addr; |
2093 | char *mpp_addr; | |
2094 | ||
2095 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2096 | mpp_addr = hdr->addr3; | |
2097 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2098 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2099 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2100 | mpp_addr = hdr->addr4; |
2101 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2102 | } else { |
2103 | return RX_DROP_MONITOR; | |
43b7b314 | 2104 | } |
79617dee | 2105 | |
79617dee | 2106 | rcu_read_lock(); |
bf7cd94d | 2107 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2108 | if (!mppath) { |
bf7cd94d | 2109 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2110 | } else { |
2111 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2112 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2113 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2114 | spin_unlock_bh(&mppath->state_lock); |
2115 | } | |
2116 | rcu_read_unlock(); | |
2117 | } | |
2118 | ||
3c5772a5 JC |
2119 | /* Frame has reached destination. Don't forward */ |
2120 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2121 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2122 | return RX_CONTINUE; |
2123 | ||
00e96dec | 2124 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2125 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2126 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2127 | return RX_DROP_MONITOR; |
2128 | } | |
2129 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2130 | |
30789eb6 TP |
2131 | if (!--mesh_hdr->ttl) { |
2132 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2133 | goto out; |
30789eb6 TP |
2134 | } |
2135 | ||
d665508b CYY |
2136 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2137 | goto out; | |
2138 | ||
30789eb6 TP |
2139 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2140 | if (!fwd_skb) { | |
bdcbd8e0 | 2141 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2142 | sdata->name); |
30789eb6 TP |
2143 | goto out; |
2144 | } | |
2145 | ||
2146 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2147 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2148 | info = IEEE80211_SKB_CB(fwd_skb); |
2149 | memset(info, 0, sizeof(*info)); | |
2150 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2151 | info->control.vif = &rx->sdata->vif; | |
2152 | info->control.jiffies = jiffies; | |
2153 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2154 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2155 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2156 | /* update power mode indication when forwarding */ |
2157 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2158 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2159 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2160 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2161 | } else { | |
2162 | /* unable to resolve next hop */ | |
bf7cd94d | 2163 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2164 | fwd_hdr->addr3, 0, |
2165 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2166 | fwd_hdr->addr2); | |
30789eb6 | 2167 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2168 | kfree_skb(fwd_skb); |
30789eb6 | 2169 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2170 | } |
2171 | ||
30789eb6 TP |
2172 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2173 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2174 | out: |
3c5772a5 | 2175 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2176 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2177 | return RX_CONTINUE; |
2178 | else | |
2179 | return RX_DROP_MONITOR; | |
2180 | } | |
bf94e17b | 2181 | #endif |
e32f85f7 | 2182 | |
49461622 | 2183 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2184 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2185 | { |
eb9fb5b8 | 2186 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2187 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2188 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2189 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2190 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2191 | bool port_control; |
ce3edf6d | 2192 | int err; |
76ee65bf | 2193 | |
358c8d9d | 2194 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2195 | return RX_CONTINUE; |
76ee65bf | 2196 | |
358c8d9d | 2197 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2198 | return RX_DROP_MONITOR; |
76ee65bf | 2199 | |
f14543ee | 2200 | /* |
e7f4a940 JB |
2201 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2202 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2203 | */ |
2204 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2205 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2206 | if (rx->sta && | |
2207 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2208 | cfg80211_rx_unexpected_4addr_frame( | |
2209 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2210 | return RX_DROP_MONITOR; |
e7f4a940 | 2211 | } |
f14543ee | 2212 | |
4114fa21 | 2213 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2214 | if (unlikely(err)) |
e4c26add | 2215 | return RX_DROP_UNUSABLE; |
76ee65bf | 2216 | |
358c8d9d | 2217 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2218 | return RX_DROP_MONITOR; |
ce3edf6d | 2219 | |
4114fa21 FF |
2220 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2221 | unlikely(port_control) && sdata->bss) { | |
2222 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2223 | u.ap); | |
2224 | dev = sdata->dev; | |
2225 | rx->sdata = sdata; | |
2226 | } | |
2227 | ||
76ee65bf RR |
2228 | rx->skb->dev = dev; |
2229 | ||
2230 | dev->stats.rx_packets++; | |
2231 | dev->stats.rx_bytes += rx->skb->len; | |
2232 | ||
08ca944e | 2233 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2234 | !is_multicast_ether_addr( |
2235 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2236 | (!local->scanning && | |
2237 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2238 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2239 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2240 | } | |
2241 | ||
76ee65bf | 2242 | ieee80211_deliver_skb(rx); |
571ecf67 | 2243 | |
9ae54c84 | 2244 | return RX_QUEUED; |
571ecf67 JB |
2245 | } |
2246 | ||
49461622 | 2247 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2248 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2249 | { |
71364716 | 2250 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2251 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2252 | struct tid_ampdu_rx *tid_agg_rx; |
2253 | u16 start_seq_num; | |
2254 | u16 tid; | |
2255 | ||
a7767f95 | 2256 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2257 | return RX_CONTINUE; |
71364716 | 2258 | |
a7767f95 | 2259 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2260 | struct { |
2261 | __le16 control, start_seq_num; | |
2262 | } __packed bar_data; | |
2263 | ||
71364716 | 2264 | if (!rx->sta) |
a02ae758 | 2265 | return RX_DROP_MONITOR; |
8ae5977f JB |
2266 | |
2267 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2268 | &bar_data, sizeof(bar_data))) | |
2269 | return RX_DROP_MONITOR; | |
2270 | ||
8ae5977f | 2271 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2272 | |
2273 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2274 | if (!tid_agg_rx) | |
a02ae758 | 2275 | return RX_DROP_MONITOR; |
71364716 | 2276 | |
8ae5977f | 2277 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2278 | |
2279 | /* reset session timer */ | |
20ad19d0 JB |
2280 | if (tid_agg_rx->timeout) |
2281 | mod_timer(&tid_agg_rx->session_timer, | |
2282 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2283 | |
dd318575 | 2284 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2285 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2286 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2287 | start_seq_num, frames); |
dd318575 JB |
2288 | spin_unlock(&tid_agg_rx->reorder_lock); |
2289 | ||
a02ae758 JB |
2290 | kfree_skb(skb); |
2291 | return RX_QUEUED; | |
71364716 RR |
2292 | } |
2293 | ||
08daecae JB |
2294 | /* |
2295 | * After this point, we only want management frames, | |
2296 | * so we can drop all remaining control frames to | |
2297 | * cooked monitor interfaces. | |
2298 | */ | |
2299 | return RX_DROP_MONITOR; | |
71364716 RR |
2300 | } |
2301 | ||
f4f727a6 JM |
2302 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2303 | struct ieee80211_mgmt *mgmt, | |
2304 | size_t len) | |
fea14732 JM |
2305 | { |
2306 | struct ieee80211_local *local = sdata->local; | |
2307 | struct sk_buff *skb; | |
2308 | struct ieee80211_mgmt *resp; | |
2309 | ||
b203ca39 | 2310 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2311 | /* Not to own unicast address */ |
2312 | return; | |
2313 | } | |
2314 | ||
b203ca39 JP |
2315 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2316 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2317 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2318 | return; |
2319 | } | |
2320 | ||
2321 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2322 | /* Too short SA Query request frame */ | |
2323 | return; | |
2324 | } | |
2325 | ||
2326 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2327 | if (skb == NULL) | |
2328 | return; | |
2329 | ||
2330 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2331 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2332 | memset(resp, 0, 24); | |
2333 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2334 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2335 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2336 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2337 | IEEE80211_STYPE_ACTION); | |
2338 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2339 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2340 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2341 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2342 | mgmt->u.action.u.sa_query.trans_id, | |
2343 | WLAN_SA_QUERY_TR_ID_LEN); | |
2344 | ||
62ae67be | 2345 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2346 | } |
2347 | ||
2e161f78 JB |
2348 | static ieee80211_rx_result debug_noinline |
2349 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2350 | { | |
2351 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2352 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2353 | |
2354 | /* | |
2355 | * From here on, look only at management frames. | |
2356 | * Data and control frames are already handled, | |
2357 | * and unknown (reserved) frames are useless. | |
2358 | */ | |
2359 | if (rx->skb->len < 24) | |
2360 | return RX_DROP_MONITOR; | |
2361 | ||
2362 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2363 | return RX_DROP_MONITOR; | |
2364 | ||
ee971924 JB |
2365 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2366 | ieee80211_is_beacon(mgmt->frame_control) && | |
2367 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2368 | int sig = 0; |
2369 | ||
2370 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2371 | sig = status->signal; | |
2372 | ||
ee971924 JB |
2373 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2374 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2375 | status->freq, sig); |
ee971924 JB |
2376 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2377 | } | |
2378 | ||
554891e6 | 2379 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2380 | return RX_DROP_MONITOR; |
2381 | ||
2382 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2383 | return RX_DROP_UNUSABLE; | |
2384 | ||
2385 | return RX_CONTINUE; | |
2386 | } | |
2387 | ||
de1ede7a JB |
2388 | static ieee80211_rx_result debug_noinline |
2389 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2390 | { | |
2391 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2392 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2393 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2394 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2395 | int len = rx->skb->len; |
2396 | ||
2397 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2398 | return RX_CONTINUE; | |
2399 | ||
026331c4 JM |
2400 | /* drop too small frames */ |
2401 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2402 | return RX_DROP_UNUSABLE; |
de1ede7a | 2403 | |
815b8092 | 2404 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2405 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2406 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2407 | return RX_DROP_UNUSABLE; |
de1ede7a | 2408 | |
554891e6 | 2409 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2410 | return RX_DROP_UNUSABLE; |
97ebe12a | 2411 | |
de1ede7a | 2412 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2413 | case WLAN_CATEGORY_HT: |
2414 | /* reject HT action frames from stations not supporting HT */ | |
2415 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2416 | goto invalid; | |
2417 | ||
2418 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2419 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2420 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2421 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2422 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2423 | break; | |
2424 | ||
ec61cd63 | 2425 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2426 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2427 | goto invalid; | |
2428 | ||
2429 | switch (mgmt->u.action.u.ht_smps.action) { | |
2430 | case WLAN_HT_ACTION_SMPS: { | |
2431 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2432 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2433 | |
2434 | /* convert to HT capability */ | |
2435 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2436 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2437 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2438 | break; |
2439 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2440 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2441 | break; |
2442 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2443 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2444 | break; |
2445 | default: | |
2446 | goto invalid; | |
2447 | } | |
1d8d3dec JB |
2448 | |
2449 | /* if no change do nothing */ | |
af0ed69b | 2450 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2451 | goto handled; |
af0ed69b | 2452 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2453 | |
2454 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2455 | ||
64f68e5d JB |
2456 | rate_control_rate_update(local, sband, rx->sta, |
2457 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2458 | goto handled; |
2459 | } | |
ec61cd63 JB |
2460 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2461 | struct ieee80211_supported_band *sband; | |
2462 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2463 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2464 | |
2465 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2466 | if (!(rx->sta->sta.ht_cap.cap & |
2467 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2468 | goto handled; |
2469 | ||
e1a0c6b3 JB |
2470 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2471 | new_bw = IEEE80211_STA_RX_BW_20; | |
2472 | else | |
2473 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2474 | |
e1a0c6b3 | 2475 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2476 | goto handled; |
2477 | ||
ec61cd63 JB |
2478 | sband = rx->local->hw.wiphy->bands[status->band]; |
2479 | ||
2480 | rate_control_rate_update(local, sband, rx->sta, | |
2481 | IEEE80211_RC_BW_CHANGED); | |
2482 | goto handled; | |
2483 | } | |
1d8d3dec JB |
2484 | default: |
2485 | goto invalid; | |
2486 | } | |
2487 | ||
0af83d3d | 2488 | break; |
1b3a2e49 JB |
2489 | case WLAN_CATEGORY_PUBLIC: |
2490 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2491 | goto invalid; | |
2492 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2493 | break; | |
2494 | if (!rx->sta) | |
2495 | break; | |
2496 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2497 | break; | |
2498 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2499 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2500 | break; | |
2501 | if (len < offsetof(struct ieee80211_mgmt, | |
2502 | u.action.u.ext_chan_switch.variable)) | |
2503 | goto invalid; | |
2504 | goto queue; | |
0af83d3d JB |
2505 | case WLAN_CATEGORY_VHT: |
2506 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2507 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2508 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2509 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2510 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2511 | break; | |
2512 | ||
2513 | /* verify action code is present */ | |
2514 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2515 | goto invalid; | |
2516 | ||
2517 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2518 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2519 | u8 opmode; | |
2520 | ||
2521 | /* verify opmode is present */ | |
2522 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2523 | goto invalid; | |
2524 | ||
2525 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2526 | ||
2527 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2528 | opmode, status->band, |
2529 | false); | |
0af83d3d JB |
2530 | goto handled; |
2531 | } | |
2532 | default: | |
2533 | break; | |
2534 | } | |
1d8d3dec | 2535 | break; |
de1ede7a | 2536 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2537 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2538 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2539 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2540 | sdata->vif.type != NL80211_IFTYPE_AP && |
2541 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2542 | break; |
8abd3f9b | 2543 | |
026331c4 JM |
2544 | /* verify action_code is present */ |
2545 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2546 | break; | |
2547 | ||
de1ede7a JB |
2548 | switch (mgmt->u.action.u.addba_req.action_code) { |
2549 | case WLAN_ACTION_ADDBA_REQ: | |
2550 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2551 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2552 | goto invalid; |
2553 | break; | |
de1ede7a JB |
2554 | case WLAN_ACTION_ADDBA_RESP: |
2555 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2556 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2557 | goto invalid; |
2558 | break; | |
de1ede7a JB |
2559 | case WLAN_ACTION_DELBA: |
2560 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2561 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2562 | goto invalid; |
2563 | break; | |
2564 | default: | |
2565 | goto invalid; | |
de1ede7a | 2566 | } |
bed7ee6e | 2567 | |
8b58ff83 | 2568 | goto queue; |
39192c0b | 2569 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2570 | /* verify action_code is present */ |
2571 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2572 | break; | |
2573 | ||
39192c0b JB |
2574 | switch (mgmt->u.action.u.measurement.action_code) { |
2575 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2576 | if (status->band != IEEE80211_BAND_5GHZ) |
2577 | break; | |
2578 | ||
39192c0b JB |
2579 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2580 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2581 | break; |
cd7760e6 SW |
2582 | |
2583 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2584 | break; | |
2585 | ||
39192c0b | 2586 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2587 | goto handled; |
cd7760e6 SW |
2588 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2589 | u8 *bssid; | |
2590 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2591 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2592 | break; |
cc32abd4 | 2593 | |
cd7760e6 | 2594 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2595 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2596 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2597 | break; |
2598 | ||
2599 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2600 | bssid = sdata->u.mgd.bssid; | |
2601 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2602 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2603 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2604 | bssid = mgmt->sa; | |
cd7760e6 SW |
2605 | else |
2606 | break; | |
2607 | ||
2608 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2609 | break; |
c481ec97 | 2610 | |
8b58ff83 | 2611 | goto queue; |
cd7760e6 | 2612 | } |
39192c0b JB |
2613 | } |
2614 | break; | |
fea14732 JM |
2615 | case WLAN_CATEGORY_SA_QUERY: |
2616 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2617 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2618 | break; |
2619 | ||
fea14732 JM |
2620 | switch (mgmt->u.action.u.sa_query.action) { |
2621 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2622 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2623 | break; |
fea14732 | 2624 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2625 | goto handled; |
fea14732 JM |
2626 | } |
2627 | break; | |
8db09850 | 2628 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2629 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2630 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2631 | break; | |
2632 | ||
8db09850 TP |
2633 | switch (mgmt->u.action.u.self_prot.action_code) { |
2634 | case WLAN_SP_MESH_PEERING_OPEN: | |
2635 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2636 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2637 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2638 | goto invalid; | |
a6dad6a2 | 2639 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2640 | /* userspace handles this frame */ |
2641 | break; | |
2642 | goto queue; | |
2643 | case WLAN_SP_MGK_INFORM: | |
2644 | case WLAN_SP_MGK_ACK: | |
2645 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2646 | goto invalid; | |
2647 | break; | |
2648 | } | |
2649 | break; | |
d3aaec8a | 2650 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2651 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2652 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2653 | break; | |
2654 | ||
77a121c3 JB |
2655 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2656 | break; | |
25d49e4d | 2657 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2658 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2659 | break; |
2660 | goto queue; | |
84040805 | 2661 | } |
026331c4 | 2662 | |
2e161f78 JB |
2663 | return RX_CONTINUE; |
2664 | ||
bed7ee6e | 2665 | invalid: |
554891e6 | 2666 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2667 | /* will return in the next handlers */ |
2668 | return RX_CONTINUE; | |
2669 | ||
2670 | handled: | |
2671 | if (rx->sta) | |
2672 | rx->sta->rx_packets++; | |
2673 | dev_kfree_skb(rx->skb); | |
2674 | return RX_QUEUED; | |
2675 | ||
2676 | queue: | |
2677 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2678 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2679 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2680 | if (rx->sta) | |
2681 | rx->sta->rx_packets++; | |
2682 | return RX_QUEUED; | |
2683 | } | |
2684 | ||
2685 | static ieee80211_rx_result debug_noinline | |
2686 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2687 | { | |
554891e6 | 2688 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2689 | int sig = 0; |
2e161f78 JB |
2690 | |
2691 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2692 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2693 | return RX_CONTINUE; |
d7907448 | 2694 | |
026331c4 JM |
2695 | /* |
2696 | * Getting here means the kernel doesn't know how to handle | |
2697 | * it, but maybe userspace does ... include returned frames | |
2698 | * so userspace can register for those to know whether ones | |
2699 | * it transmitted were processed or returned. | |
2700 | */ | |
026331c4 | 2701 | |
804483e9 JB |
2702 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2703 | sig = status->signal; | |
2704 | ||
71bbc994 | 2705 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
19504cf5 | 2706 | rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) { |
2e161f78 JB |
2707 | if (rx->sta) |
2708 | rx->sta->rx_packets++; | |
2709 | dev_kfree_skb(rx->skb); | |
2710 | return RX_QUEUED; | |
2711 | } | |
2712 | ||
2e161f78 JB |
2713 | return RX_CONTINUE; |
2714 | } | |
2715 | ||
2716 | static ieee80211_rx_result debug_noinline | |
2717 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2718 | { | |
2719 | struct ieee80211_local *local = rx->local; | |
2720 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2721 | struct sk_buff *nskb; | |
2722 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2723 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2724 | |
2725 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2726 | return RX_CONTINUE; | |
2727 | ||
2728 | /* | |
2729 | * For AP mode, hostapd is responsible for handling any action | |
2730 | * frames that we didn't handle, including returning unknown | |
2731 | * ones. For all other modes we will return them to the sender, | |
2732 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2733 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2734 | * Newer versions of hostapd shall also use the management frame |
2735 | * registration mechanisms, but older ones still use cooked | |
2736 | * monitor interfaces so push all frames there. | |
2737 | */ | |
554891e6 | 2738 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2739 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2740 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2741 | return RX_DROP_MONITOR; | |
026331c4 | 2742 | |
4b5ebccc JB |
2743 | if (is_multicast_ether_addr(mgmt->da)) |
2744 | return RX_DROP_MONITOR; | |
2745 | ||
84040805 JB |
2746 | /* do not return rejected action frames */ |
2747 | if (mgmt->u.action.category & 0x80) | |
2748 | return RX_DROP_UNUSABLE; | |
2749 | ||
2750 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2751 | GFP_ATOMIC); | |
2752 | if (nskb) { | |
292b4df6 | 2753 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2754 | |
292b4df6 JL |
2755 | nmgmt->u.action.category |= 0x80; |
2756 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2757 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2758 | |
2759 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2760 | ||
07e5a5f5 JB |
2761 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2762 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2763 | ||
2764 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2765 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2766 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2767 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2768 | info->hw_queue = | |
2769 | local->hw.offchannel_tx_hw_queue; | |
2770 | } | |
2771 | ||
2772 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2773 | status->band); | |
de1ede7a | 2774 | } |
39192c0b JB |
2775 | dev_kfree_skb(rx->skb); |
2776 | return RX_QUEUED; | |
de1ede7a JB |
2777 | } |
2778 | ||
49461622 | 2779 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2780 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2781 | { |
eb9fb5b8 | 2782 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2783 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2784 | __le16 stype; | |
571ecf67 | 2785 | |
77a121c3 | 2786 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2787 | |
77a121c3 JB |
2788 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2789 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2790 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2791 | return RX_DROP_MONITOR; | |
472dbc45 | 2792 | |
77a121c3 | 2793 | switch (stype) { |
66e67e41 | 2794 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2795 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2796 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2797 | /* process for all: mesh, mlme, ibss */ | |
2798 | break; | |
66e67e41 JB |
2799 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2800 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2801 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2802 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2803 | if (is_multicast_ether_addr(mgmt->da) && |
2804 | !is_broadcast_ether_addr(mgmt->da)) | |
2805 | return RX_DROP_MONITOR; | |
2806 | ||
77a121c3 JB |
2807 | /* process only for station */ |
2808 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2809 | return RX_DROP_MONITOR; | |
2810 | break; | |
2811 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2812 | /* process only for ibss and mesh */ |
2813 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2814 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2815 | return RX_DROP_MONITOR; |
2816 | break; | |
2817 | default: | |
2818 | return RX_DROP_MONITOR; | |
2819 | } | |
f9d540ee | 2820 | |
77a121c3 | 2821 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2822 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2823 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2824 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2825 | if (rx->sta) |
2826 | rx->sta->rx_packets++; | |
46900298 | 2827 | |
77a121c3 | 2828 | return RX_QUEUED; |
571ecf67 JB |
2829 | } |
2830 | ||
5cf121c3 | 2831 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2832 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2833 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2834 | { |
2835 | struct ieee80211_sub_if_data *sdata; | |
2836 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2837 | struct sk_buff *skb = rx->skb, *skb2; |
2838 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2839 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2840 | int needed_headroom; |
3d30d949 | 2841 | |
554891e6 JB |
2842 | /* |
2843 | * If cooked monitor has been processed already, then | |
2844 | * don't do it again. If not, set the flag. | |
2845 | */ | |
2846 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2847 | goto out_free_skb; |
554891e6 | 2848 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2849 | |
152c477a JB |
2850 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2851 | if (!local->cooked_mntrs) | |
2852 | goto out_free_skb; | |
2853 | ||
293702a3 | 2854 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2855 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2856 | |
293702a3 JB |
2857 | if (skb_headroom(skb) < needed_headroom && |
2858 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2859 | goto out_free_skb; | |
3d30d949 | 2860 | |
293702a3 | 2861 | /* prepend radiotap information */ |
973ef21a FF |
2862 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2863 | false); | |
3d30d949 MW |
2864 | |
2865 | skb_set_mac_header(skb, 0); | |
2866 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2867 | skb->pkt_type = PACKET_OTHERHOST; | |
2868 | skb->protocol = htons(ETH_P_802_2); | |
2869 | ||
2870 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2871 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2872 | continue; |
2873 | ||
05c914fe | 2874 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2875 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2876 | continue; | |
2877 | ||
2878 | if (prev_dev) { | |
2879 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2880 | if (skb2) { | |
2881 | skb2->dev = prev_dev; | |
5548a8a1 | 2882 | netif_receive_skb(skb2); |
3d30d949 MW |
2883 | } |
2884 | } | |
2885 | ||
2886 | prev_dev = sdata->dev; | |
2887 | sdata->dev->stats.rx_packets++; | |
2888 | sdata->dev->stats.rx_bytes += skb->len; | |
2889 | } | |
2890 | ||
2891 | if (prev_dev) { | |
2892 | skb->dev = prev_dev; | |
5548a8a1 | 2893 | netif_receive_skb(skb); |
554891e6 JB |
2894 | return; |
2895 | } | |
3d30d949 MW |
2896 | |
2897 | out_free_skb: | |
2898 | dev_kfree_skb(skb); | |
2899 | } | |
2900 | ||
aa0c8636 CL |
2901 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2902 | ieee80211_rx_result res) | |
2903 | { | |
2904 | switch (res) { | |
2905 | case RX_DROP_MONITOR: | |
2906 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2907 | if (rx->sta) | |
2908 | rx->sta->rx_dropped++; | |
2909 | /* fall through */ | |
2910 | case RX_CONTINUE: { | |
2911 | struct ieee80211_rate *rate = NULL; | |
2912 | struct ieee80211_supported_band *sband; | |
2913 | struct ieee80211_rx_status *status; | |
2914 | ||
2915 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2916 | ||
2917 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2918 | if (!(status->flag & RX_FLAG_HT) && |
2919 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2920 | rate = &sband->bitrates[status->rate_idx]; |
2921 | ||
2922 | ieee80211_rx_cooked_monitor(rx, rate); | |
2923 | break; | |
2924 | } | |
2925 | case RX_DROP_UNUSABLE: | |
2926 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2927 | if (rx->sta) | |
2928 | rx->sta->rx_dropped++; | |
2929 | dev_kfree_skb(rx->skb); | |
2930 | break; | |
2931 | case RX_QUEUED: | |
2932 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2933 | break; | |
2934 | } | |
2935 | } | |
571ecf67 | 2936 | |
f9e124fb CL |
2937 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2938 | struct sk_buff_head *frames) | |
58905290 | 2939 | { |
58905290 | 2940 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2941 | struct sk_buff *skb; |
8944b79f | 2942 | |
e32f85f7 LCC |
2943 | #define CALL_RXH(rxh) \ |
2944 | do { \ | |
2945 | res = rxh(rx); \ | |
2946 | if (res != RX_CONTINUE) \ | |
2569a826 | 2947 | goto rxh_next; \ |
e32f85f7 | 2948 | } while (0); |
49461622 | 2949 | |
f9e124fb | 2950 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2951 | |
f9e124fb | 2952 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2953 | /* |
2954 | * all the other fields are valid across frames | |
2955 | * that belong to an aMPDU since they are on the | |
2956 | * same TID from the same station | |
2957 | */ | |
2958 | rx->skb = skb; | |
2959 | ||
2569a826 | 2960 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 2961 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 2962 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 2963 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 2964 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
2965 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2966 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2967 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2968 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2969 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2970 | #endif |
2154c81c | 2971 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2972 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
2973 | |
2974 | /* special treatment -- needs the queue */ | |
2975 | res = ieee80211_rx_h_ctrl(rx, frames); | |
2976 | if (res != RX_CONTINUE) | |
2977 | goto rxh_next; | |
2978 | ||
2e161f78 | 2979 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 2980 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
2981 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
2982 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 2983 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 2984 | |
aa0c8636 CL |
2985 | rxh_next: |
2986 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 2987 | |
49461622 | 2988 | #undef CALL_RXH |
aa0c8636 | 2989 | } |
24a8fdad | 2990 | |
f9e124fb | 2991 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
2992 | } |
2993 | ||
4406c376 | 2994 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 2995 | { |
f9e124fb | 2996 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
2997 | ieee80211_rx_result res = RX_DROP_MONITOR; |
2998 | ||
f9e124fb CL |
2999 | __skb_queue_head_init(&reorder_release); |
3000 | ||
aa0c8636 CL |
3001 | #define CALL_RXH(rxh) \ |
3002 | do { \ | |
3003 | res = rxh(rx); \ | |
3004 | if (res != RX_CONTINUE) \ | |
3005 | goto rxh_next; \ | |
3006 | } while (0); | |
3007 | ||
aa0c8636 CL |
3008 | CALL_RXH(ieee80211_rx_h_check) |
3009 | ||
f9e124fb | 3010 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3011 | |
f9e124fb | 3012 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3013 | return; |
49461622 | 3014 | |
2569a826 | 3015 | rxh_next: |
aa0c8636 CL |
3016 | ieee80211_rx_handlers_result(rx, res); |
3017 | ||
3018 | #undef CALL_RXH | |
58905290 JB |
3019 | } |
3020 | ||
2bff8ebf | 3021 | /* |
dd318575 JB |
3022 | * This function makes calls into the RX path, therefore |
3023 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3024 | */ |
3025 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3026 | { | |
f9e124fb | 3027 | struct sk_buff_head frames; |
554891e6 JB |
3028 | struct ieee80211_rx_data rx = { |
3029 | .sta = sta, | |
3030 | .sdata = sta->sdata, | |
3031 | .local = sta->local, | |
9e26297a JB |
3032 | /* This is OK -- must be QoS data frame */ |
3033 | .security_idx = tid, | |
3034 | .seqno_idx = tid, | |
fcf8bd3b | 3035 | .flags = 0, |
554891e6 | 3036 | }; |
2c15a0cf CL |
3037 | struct tid_ampdu_rx *tid_agg_rx; |
3038 | ||
3039 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3040 | if (!tid_agg_rx) | |
3041 | return; | |
2bff8ebf | 3042 | |
f9e124fb CL |
3043 | __skb_queue_head_init(&frames); |
3044 | ||
2c15a0cf | 3045 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3046 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3047 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3048 | |
f9e124fb | 3049 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3050 | } |
3051 | ||
571ecf67 JB |
3052 | /* main receive path */ |
3053 | ||
3c2723f5 JB |
3054 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3055 | struct ieee80211_hdr *hdr) | |
23a24def | 3056 | { |
20b01f80 | 3057 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3058 | struct sk_buff *skb = rx->skb; |
3059 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3060 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3061 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3062 | ||
51fb61e7 | 3063 | switch (sdata->vif.type) { |
05c914fe | 3064 | case NL80211_IFTYPE_STATION: |
9bc383de | 3065 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3066 | return false; |
77fdaa12 | 3067 | if (!multicast && |
b203ca39 | 3068 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3069 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3070 | sdata->u.mgd.use_4addr) | |
3c2723f5 | 3071 | return false; |
554891e6 | 3072 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3073 | } |
3074 | break; | |
05c914fe | 3075 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3076 | if (!bssid) |
3c2723f5 | 3077 | return false; |
6329b8d9 FF |
3078 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3079 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3080 | return false; |
a7767f95 | 3081 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3082 | return true; |
d48b2968 | 3083 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3084 | return false; |
23a24def | 3085 | } else if (!multicast && |
b203ca39 | 3086 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3087 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3088 | return false; |
554891e6 | 3089 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3090 | } else if (!rx->sta) { |
3091 | int rate_idx; | |
5614618e JB |
3092 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3093 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3094 | else |
eb9fb5b8 | 3095 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3096 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3097 | BIT(rate_idx)); | |
0fb8ca45 | 3098 | } |
23a24def | 3099 | break; |
05c914fe | 3100 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3101 | if (!multicast && |
b203ca39 | 3102 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 | 3103 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3104 | return false; |
6032f934 | 3105 | |
554891e6 | 3106 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3107 | } |
3108 | break; | |
05c914fe JB |
3109 | case NL80211_IFTYPE_AP_VLAN: |
3110 | case NL80211_IFTYPE_AP: | |
23a24def | 3111 | if (!bssid) { |
b203ca39 | 3112 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3113 | return false; |
f142c6b9 | 3114 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3115 | /* |
3116 | * Accept public action frames even when the | |
3117 | * BSSID doesn't match, this is used for P2P | |
3118 | * and location updates. Note that mac80211 | |
3119 | * itself never looks at these frames. | |
3120 | */ | |
2b9ccd4e JB |
3121 | if (!multicast && |
3122 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3123 | return false; |
d48b2968 | 3124 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3125 | return true; |
d48b2968 | 3126 | if (!ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3127 | return false; |
554891e6 | 3128 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 3129 | } |
23a24def | 3130 | break; |
05c914fe | 3131 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3132 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3133 | return false; |
b203ca39 | 3134 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
3c2723f5 | 3135 | return false; |
23a24def | 3136 | break; |
f142c6b9 JB |
3137 | case NL80211_IFTYPE_P2P_DEVICE: |
3138 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3139 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3140 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3141 | !ieee80211_is_beacon(hdr->frame_control)) | |
3c2723f5 | 3142 | return false; |
1b737f88 JB |
3143 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3144 | !multicast) | |
f142c6b9 JB |
3145 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3146 | break; | |
2ca27bcf | 3147 | default: |
fb1c1cd6 | 3148 | /* should never get here */ |
f142c6b9 | 3149 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3150 | break; |
23a24def JB |
3151 | } |
3152 | ||
3c2723f5 | 3153 | return true; |
23a24def JB |
3154 | } |
3155 | ||
4406c376 JB |
3156 | /* |
3157 | * This function returns whether or not the SKB | |
3158 | * was destined for RX processing or not, which, | |
3159 | * if consume is true, is equivalent to whether | |
3160 | * or not the skb was consumed. | |
3161 | */ | |
3162 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3163 | struct sk_buff *skb, bool consume) | |
3164 | { | |
3165 | struct ieee80211_local *local = rx->local; | |
3166 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3167 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3168 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3169 | |
3170 | rx->skb = skb; | |
554891e6 | 3171 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3172 | |
40791942 | 3173 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3174 | return false; |
3175 | ||
4406c376 JB |
3176 | if (!consume) { |
3177 | skb = skb_copy(skb, GFP_ATOMIC); | |
3178 | if (!skb) { | |
3179 | if (net_ratelimit()) | |
3180 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3181 | "failed to copy skb for %s\n", |
4406c376 JB |
3182 | sdata->name); |
3183 | return true; | |
3184 | } | |
3185 | ||
3186 | rx->skb = skb; | |
3187 | } | |
3188 | ||
3189 | ieee80211_invoke_rx_handlers(rx); | |
3190 | return true; | |
3191 | } | |
3192 | ||
571ecf67 | 3193 | /* |
6368e4b1 RR |
3194 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
3195 | * be called with rcu_read_lock protection. | |
571ecf67 | 3196 | */ |
71ebb4aa | 3197 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3198 | struct sk_buff *skb) |
571ecf67 JB |
3199 | { |
3200 | struct ieee80211_local *local = hw_to_local(hw); | |
3201 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3202 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3203 | __le16 fc; |
5cf121c3 | 3204 | struct ieee80211_rx_data rx; |
4406c376 | 3205 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3206 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3207 | int err = 0; |
571ecf67 | 3208 | |
e3cf8b3f | 3209 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3210 | memset(&rx, 0, sizeof(rx)); |
3211 | rx.skb = skb; | |
3212 | rx.local = local; | |
72abd81b | 3213 | |
e3cf8b3f | 3214 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3215 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3216 | |
4a4f1a58 JB |
3217 | if (ieee80211_is_mgmt(fc)) { |
3218 | /* drop frame if too short for header */ | |
3219 | if (skb->len < ieee80211_hdrlen(fc)) | |
3220 | err = -ENOBUFS; | |
3221 | else | |
3222 | err = skb_linearize(skb); | |
3223 | } else { | |
e3cf8b3f | 3224 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3225 | } |
e3cf8b3f ZY |
3226 | |
3227 | if (err) { | |
3228 | dev_kfree_skb(skb); | |
3229 | return; | |
3230 | } | |
3231 | ||
3232 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3233 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3234 | ieee80211_verify_alignment(&rx); |
38f3714d | 3235 | |
d48b2968 JB |
3236 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3237 | ieee80211_is_beacon(hdr->frame_control))) | |
3238 | ieee80211_scan_rx(local, skb); | |
3239 | ||
e3cf8b3f | 3240 | if (ieee80211_is_data(fc)) { |
56af3268 | 3241 | prev_sta = NULL; |
4406c376 | 3242 | |
7852e361 | 3243 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3244 | if (!prev_sta) { |
3245 | prev_sta = sta; | |
3246 | continue; | |
3247 | } | |
3248 | ||
3249 | rx.sta = prev_sta; | |
3250 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3251 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3252 | |
56af3268 | 3253 | prev_sta = sta; |
4406c376 | 3254 | } |
56af3268 BG |
3255 | |
3256 | if (prev_sta) { | |
3257 | rx.sta = prev_sta; | |
3258 | rx.sdata = prev_sta->sdata; | |
3259 | ||
4406c376 | 3260 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3261 | return; |
8e26d5ad | 3262 | goto out; |
56af3268 | 3263 | } |
4406c376 JB |
3264 | } |
3265 | ||
4b0dd98e | 3266 | prev = NULL; |
b2e7771e | 3267 | |
4b0dd98e JB |
3268 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3269 | if (!ieee80211_sdata_running(sdata)) | |
3270 | continue; | |
340e11f3 | 3271 | |
4b0dd98e JB |
3272 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3273 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3274 | continue; | |
340e11f3 | 3275 | |
4b0dd98e JB |
3276 | /* |
3277 | * frame is destined for this interface, but if it's | |
3278 | * not also for the previous one we handle that after | |
3279 | * the loop to avoid copying the SKB once too much | |
3280 | */ | |
4bb29f8c | 3281 | |
4b0dd98e | 3282 | if (!prev) { |
abe60632 | 3283 | prev = sdata; |
4b0dd98e | 3284 | continue; |
340e11f3 | 3285 | } |
4bb29f8c | 3286 | |
7852e361 | 3287 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3288 | rx.sdata = prev; |
3289 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3290 | |
4b0dd98e JB |
3291 | prev = sdata; |
3292 | } | |
3293 | ||
3294 | if (prev) { | |
7852e361 | 3295 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3296 | rx.sdata = prev; |
4406c376 | 3297 | |
4b0dd98e JB |
3298 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3299 | return; | |
571ecf67 | 3300 | } |
4406c376 | 3301 | |
8e26d5ad | 3302 | out: |
4406c376 | 3303 | dev_kfree_skb(skb); |
571ecf67 | 3304 | } |
6368e4b1 RR |
3305 | |
3306 | /* | |
3307 | * This is the receive path handler. It is called by a low level driver when an | |
3308 | * 802.11 MPDU is received from the hardware. | |
3309 | */ | |
103bf9f7 | 3310 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3311 | { |
3312 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3313 | struct ieee80211_rate *rate = NULL; |
3314 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3315 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3316 | |
d20ef63d JB |
3317 | WARN_ON_ONCE(softirq_count() == 0); |
3318 | ||
444e3803 | 3319 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3320 | goto drop; |
8318d78a JB |
3321 | |
3322 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3323 | if (WARN_ON(!sband)) |
3324 | goto drop; | |
8318d78a | 3325 | |
89c3a8ac JB |
3326 | /* |
3327 | * If we're suspending, it is possible although not too likely | |
3328 | * that we'd be receiving frames after having already partially | |
3329 | * quiesced the stack. We can't process such frames then since | |
3330 | * that might, for example, cause stations to be added or other | |
3331 | * driver callbacks be invoked. | |
3332 | */ | |
77a980dc JB |
3333 | if (unlikely(local->quiescing || local->suspended)) |
3334 | goto drop; | |
89c3a8ac | 3335 | |
04800ada AN |
3336 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3337 | if (unlikely(local->in_reconfig)) | |
3338 | goto drop; | |
3339 | ||
ea77f12f JB |
3340 | /* |
3341 | * The same happens when we're not even started, | |
3342 | * but that's worth a warning. | |
3343 | */ | |
77a980dc JB |
3344 | if (WARN_ON(!local->started)) |
3345 | goto drop; | |
ea77f12f | 3346 | |
fc885189 | 3347 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3348 | /* |
fc885189 JB |
3349 | * Validate the rate, unless a PLCP error means that |
3350 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3351 | */ |
fc885189 JB |
3352 | |
3353 | if (status->flag & RX_FLAG_HT) { | |
3354 | /* | |
3355 | * rate_idx is MCS index, which can be [0-76] | |
3356 | * as documented on: | |
3357 | * | |
3358 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3359 | * | |
3360 | * Anything else would be some sort of driver or | |
3361 | * hardware error. The driver should catch hardware | |
3362 | * errors. | |
3363 | */ | |
444e3803 | 3364 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3365 | "Rate marked as an HT rate but passed " |
3366 | "status->rate_idx is not " | |
3367 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3368 | status->rate_idx, | |
3369 | status->rate_idx)) | |
3370 | goto drop; | |
5614618e JB |
3371 | } else if (status->flag & RX_FLAG_VHT) { |
3372 | if (WARN_ONCE(status->rate_idx > 9 || | |
3373 | !status->vht_nss || | |
3374 | status->vht_nss > 8, | |
3375 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3376 | status->rate_idx, status->vht_nss)) | |
3377 | goto drop; | |
fc885189 | 3378 | } else { |
444e3803 | 3379 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3380 | goto drop; |
3381 | rate = &sband->bitrates[status->rate_idx]; | |
3382 | } | |
0fb8ca45 | 3383 | } |
6368e4b1 | 3384 | |
554891e6 JB |
3385 | status->rx_flags = 0; |
3386 | ||
6368e4b1 RR |
3387 | /* |
3388 | * key references and virtual interfaces are protected using RCU | |
3389 | * and this requires that we are in a read-side RCU section during | |
3390 | * receive processing | |
3391 | */ | |
3392 | rcu_read_lock(); | |
3393 | ||
3394 | /* | |
3395 | * Frames with failed FCS/PLCP checksum are not returned, | |
3396 | * all other frames are returned without radiotap header | |
3397 | * if it was previously present. | |
3398 | * Also, frames with less than 16 bytes are dropped. | |
3399 | */ | |
f1d58c25 | 3400 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3401 | if (!skb) { |
3402 | rcu_read_unlock(); | |
3403 | return; | |
3404 | } | |
3405 | ||
e1e54068 JB |
3406 | ieee80211_tpt_led_trig_rx(local, |
3407 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3408 | skb->len); | |
071d9ac2 | 3409 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3410 | |
3411 | rcu_read_unlock(); | |
77a980dc JB |
3412 | |
3413 | return; | |
3414 | drop: | |
3415 | kfree_skb(skb); | |
6368e4b1 | 3416 | } |
103bf9f7 | 3417 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3418 | |
3419 | /* This is a version of the rx handler that can be called from hard irq | |
3420 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3421 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3422 | { |
3423 | struct ieee80211_local *local = hw_to_local(hw); | |
3424 | ||
3425 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3426 | ||
571ecf67 JB |
3427 | skb->pkt_type = IEEE80211_RX_MSG; |
3428 | skb_queue_tail(&local->skb_queue, skb); | |
3429 | tasklet_schedule(&local->tasklet); | |
3430 | } | |
3431 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |