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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
571ecf67 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
ab46623e | 12 | #include <linux/jiffies.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
571ecf67 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/etherdevice.h> | |
d4e46a3d | 18 | #include <linux/rcupdate.h> |
bc3b2d7f | 19 | #include <linux/export.h> |
571ecf67 JB |
20 | #include <net/mac80211.h> |
21 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 22 | #include <asm/unaligned.h> |
571ecf67 JB |
23 | |
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
2c8dccc7 | 26 | #include "led.h" |
33b64eb2 | 27 | #include "mesh.h" |
571ecf67 JB |
28 | #include "wep.h" |
29 | #include "wpa.h" | |
30 | #include "tkip.h" | |
31 | #include "wme.h" | |
1d8d3dec | 32 | #include "rate.h" |
571ecf67 | 33 | |
b2e7771e JB |
34 | /* |
35 | * monitor mode reception | |
36 | * | |
37 | * This function cleans up the SKB, i.e. it removes all the stuff | |
38 | * only useful for monitoring. | |
39 | */ | |
40 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
0869aea0 | 41 | struct sk_buff *skb) |
b2e7771e | 42 | { |
90b9e446 JB |
43 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
44 | ||
b2e7771e JB |
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
46 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
48 | else { |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
0624760c | 52 | return NULL; |
b2e7771e JB |
53 | } |
54 | } | |
55 | ||
90b9e446 JB |
56 | if (status->vendor_radiotap_len) |
57 | __pskb_pull(skb, status->vendor_radiotap_len); | |
58 | ||
b2e7771e JB |
59 | return skb; |
60 | } | |
61 | ||
1df332e8 | 62 | static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 63 | { |
f1d58c25 | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
605f1a5b JB |
65 | struct ieee80211_hdr *hdr; |
66 | ||
67 | hdr = (void *)(skb->data + status->vendor_radiotap_len); | |
b2e7771e | 68 | |
4c298677 JB |
69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
70 | RX_FLAG_FAILED_PLCP_CRC | | |
71 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
b2e7771e | 72 | return 1; |
605f1a5b JB |
73 | if (unlikely(skb->len < 16 + present_fcs_len + |
74 | status->vendor_radiotap_len)) | |
b2e7771e | 75 | return 1; |
87228f57 HH |
76 | if (ieee80211_is_ctl(hdr->frame_control) && |
77 | !ieee80211_is_pspoll(hdr->frame_control) && | |
78 | !ieee80211_is_back_req(hdr->frame_control)) | |
b2e7771e JB |
79 | return 1; |
80 | return 0; | |
81 | } | |
82 | ||
601ae7f2 | 83 | static int |
90b9e446 JB |
84 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
85 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
86 | { |
87 | int len; | |
88 | ||
89 | /* always present fields */ | |
a144f378 | 90 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 91 | |
a144f378 | 92 | /* allocate extra bitmaps */ |
90b9e446 JB |
93 | if (status->vendor_radiotap_len) |
94 | len += 4; | |
a144f378 JB |
95 | if (status->chains) |
96 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
97 | |
98 | if (ieee80211_have_rx_timestamp(status)) { | |
99 | len = ALIGN(len, 8); | |
601ae7f2 | 100 | len += 8; |
90b9e446 | 101 | } |
7fee5372 | 102 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 103 | len += 1; |
601ae7f2 | 104 | |
a144f378 JB |
105 | /* antenna field, if we don't have per-chain info */ |
106 | if (!status->chains) | |
107 | len += 1; | |
108 | ||
90b9e446 JB |
109 | /* padding for RX_FLAGS if necessary */ |
110 | len = ALIGN(len, 2); | |
601ae7f2 | 111 | |
6d744bac JB |
112 | if (status->flag & RX_FLAG_HT) /* HT info */ |
113 | len += 3; | |
114 | ||
4c298677 | 115 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 116 | len = ALIGN(len, 4); |
4c298677 JB |
117 | len += 8; |
118 | } | |
119 | ||
51648921 JB |
120 | if (status->flag & RX_FLAG_VHT) { |
121 | len = ALIGN(len, 2); | |
122 | len += 12; | |
123 | } | |
124 | ||
a144f378 JB |
125 | if (status->chains) { |
126 | /* antenna and antenna signal fields */ | |
127 | len += 2 * hweight8(status->chains); | |
128 | } | |
129 | ||
90b9e446 JB |
130 | if (status->vendor_radiotap_len) { |
131 | if (WARN_ON_ONCE(status->vendor_radiotap_align == 0)) | |
132 | status->vendor_radiotap_align = 1; | |
133 | /* align standard part of vendor namespace */ | |
134 | len = ALIGN(len, 2); | |
135 | /* allocate standard part of vendor namespace */ | |
136 | len += 6; | |
137 | /* align vendor-defined part */ | |
138 | len = ALIGN(len, status->vendor_radiotap_align); | |
139 | /* vendor-defined part is already in skb */ | |
140 | } | |
141 | ||
601ae7f2 BR |
142 | return len; |
143 | } | |
144 | ||
00ea6deb | 145 | /* |
601ae7f2 BR |
146 | * ieee80211_add_rx_radiotap_header - add radiotap header |
147 | * | |
148 | * add a radiotap header containing all the fields which the hardware provided. | |
149 | */ | |
150 | static void | |
151 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
152 | struct sk_buff *skb, | |
601ae7f2 | 153 | struct ieee80211_rate *rate, |
973ef21a | 154 | int rtap_len, bool has_fcs) |
601ae7f2 | 155 | { |
f1d58c25 | 156 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
157 | struct ieee80211_radiotap_header *rthdr; |
158 | unsigned char *pos; | |
a144f378 JB |
159 | __le32 *it_present; |
160 | u32 it_present_val; | |
6a86b9c7 | 161 | u16 rx_flags = 0; |
a5e70697 | 162 | u16 channel_flags = 0; |
a144f378 JB |
163 | int mpdulen, chain; |
164 | unsigned long chains = status->chains; | |
f4bda337 TP |
165 | |
166 | mpdulen = skb->len; | |
167 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
168 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
169 | |
170 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
171 | memset(rthdr, 0, rtap_len); | |
a144f378 | 172 | it_present = &rthdr->it_present; |
601ae7f2 BR |
173 | |
174 | /* radiotap header, set always present flags */ | |
90b9e446 | 175 | rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len); |
a144f378 JB |
176 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
177 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
178 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
179 | ||
180 | if (!status->chains) | |
181 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
182 | ||
183 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
184 | it_present_val |= | |
185 | BIT(IEEE80211_RADIOTAP_EXT) | | |
186 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
187 | put_unaligned_le32(it_present_val, it_present); | |
188 | it_present++; | |
189 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
190 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
191 | } | |
601ae7f2 | 192 | |
90b9e446 | 193 | if (status->vendor_radiotap_len) { |
a144f378 JB |
194 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | |
195 | BIT(IEEE80211_RADIOTAP_EXT); | |
196 | put_unaligned_le32(it_present_val, it_present); | |
197 | it_present++; | |
198 | it_present_val = status->vendor_radiotap_bitmap; | |
90b9e446 JB |
199 | } |
200 | ||
a144f378 JB |
201 | put_unaligned_le32(it_present_val, it_present); |
202 | ||
203 | pos = (void *)(it_present + 1); | |
204 | ||
601ae7f2 BR |
205 | /* the order of the following fields is important */ |
206 | ||
207 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 208 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
209 | /* padding */ |
210 | while ((pos - (u8 *)rthdr) & 7) | |
211 | *pos++ = 0; | |
f4bda337 TP |
212 | put_unaligned_le64( |
213 | ieee80211_calculate_rx_timestamp(local, status, | |
214 | mpdulen, 0), | |
215 | pos); | |
1df332e8 | 216 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
217 | pos += 8; |
218 | } | |
219 | ||
220 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 221 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 222 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
223 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
224 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
225 | if (status->flag & RX_FLAG_SHORTPRE) |
226 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
227 | pos++; |
228 | ||
229 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 230 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 231 | /* |
f8d1ccf1 | 232 | * Without rate information don't add it. If we have, |
38f37be2 | 233 | * MCS information is a separate field in radiotap, |
73b48099 JB |
234 | * added below. The byte here is needed as padding |
235 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
236 | */ |
237 | *pos = 0; | |
8d6f658e | 238 | } else { |
2103dec1 | 239 | int shift = 0; |
ebe6c7ba | 240 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
241 | if (status->flag & RX_FLAG_10MHZ) |
242 | shift = 1; | |
243 | else if (status->flag & RX_FLAG_5MHZ) | |
244 | shift = 2; | |
245 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 246 | } |
601ae7f2 BR |
247 | pos++; |
248 | ||
249 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 250 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 251 | pos += 2; |
a5e70697 SW |
252 | if (status->flag & RX_FLAG_10MHZ) |
253 | channel_flags |= IEEE80211_CHAN_HALF; | |
254 | else if (status->flag & RX_FLAG_5MHZ) | |
255 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
256 | ||
601ae7f2 | 257 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 258 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 259 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 260 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 261 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 262 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 263 | else if (rate) |
a5e70697 | 264 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 265 | else |
a5e70697 SW |
266 | channel_flags |= IEEE80211_CHAN_2GHZ; |
267 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
268 | pos += 2; |
269 | ||
270 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
271 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
272 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
273 | *pos = status->signal; |
274 | rthdr->it_present |= | |
275 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
276 | pos++; | |
277 | } | |
278 | ||
601ae7f2 BR |
279 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
280 | ||
a144f378 JB |
281 | if (!status->chains) { |
282 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
283 | *pos = status->antenna; | |
284 | pos++; | |
285 | } | |
601ae7f2 | 286 | |
601ae7f2 BR |
287 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
288 | ||
289 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
290 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 291 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 292 | *pos++ = 0; |
aae89831 | 293 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
294 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
295 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 296 | pos += 2; |
6d744bac JB |
297 | |
298 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
299 | unsigned int stbc; |
300 | ||
6d744bac | 301 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 302 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
303 | *pos = 0; |
304 | if (status->flag & RX_FLAG_SHORT_GI) | |
305 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
306 | if (status->flag & RX_FLAG_40MHZ) | |
307 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
308 | if (status->flag & RX_FLAG_HT_GF) |
309 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
786677d1 OR |
310 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
311 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
312 | pos++; |
313 | *pos++ = status->rate_idx; | |
314 | } | |
4c298677 JB |
315 | |
316 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
317 | u16 flags = 0; | |
318 | ||
319 | /* ensure 4 byte alignment */ | |
320 | while ((pos - (u8 *)rthdr) & 3) | |
321 | pos++; | |
322 | rthdr->it_present |= | |
323 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
324 | put_unaligned_le32(status->ampdu_reference, pos); | |
325 | pos += 4; | |
326 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
327 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
328 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
329 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
330 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
331 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
332 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
333 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
334 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
335 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
336 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
337 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
338 | put_unaligned_le16(flags, pos); | |
339 | pos += 2; | |
340 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
341 | *pos++ = status->ampdu_delimiter_crc; | |
342 | else | |
343 | *pos++ = 0; | |
344 | *pos++ = 0; | |
345 | } | |
90b9e446 | 346 | |
51648921 JB |
347 | if (status->flag & RX_FLAG_VHT) { |
348 | u16 known = local->hw.radiotap_vht_details; | |
349 | ||
350 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
351 | /* known field - how to handle 80+80? */ | |
352 | if (status->flag & RX_FLAG_80P80MHZ) | |
353 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; | |
354 | put_unaligned_le16(known, pos); | |
355 | pos += 2; | |
356 | /* flags */ | |
357 | if (status->flag & RX_FLAG_SHORT_GI) | |
358 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
359 | pos++; | |
360 | /* bandwidth */ | |
361 | if (status->flag & RX_FLAG_80MHZ) | |
362 | *pos++ = 4; | |
363 | else if (status->flag & RX_FLAG_80P80MHZ) | |
364 | *pos++ = 0; /* marked not known above */ | |
365 | else if (status->flag & RX_FLAG_160MHZ) | |
366 | *pos++ = 11; | |
367 | else if (status->flag & RX_FLAG_40MHZ) | |
368 | *pos++ = 1; | |
369 | else /* 20 MHz */ | |
370 | *pos++ = 0; | |
371 | /* MCS/NSS */ | |
372 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
373 | pos += 4; | |
374 | /* coding field */ | |
375 | pos++; | |
376 | /* group ID */ | |
377 | pos++; | |
378 | /* partial_aid */ | |
379 | pos += 2; | |
380 | } | |
381 | ||
a144f378 JB |
382 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
383 | *pos++ = status->chain_signal[chain]; | |
384 | *pos++ = chain; | |
385 | } | |
386 | ||
90b9e446 JB |
387 | if (status->vendor_radiotap_len) { |
388 | /* ensure 2 byte alignment for the vendor field as required */ | |
389 | if ((pos - (u8 *)rthdr) & 1) | |
390 | *pos++ = 0; | |
391 | *pos++ = status->vendor_radiotap_oui[0]; | |
392 | *pos++ = status->vendor_radiotap_oui[1]; | |
393 | *pos++ = status->vendor_radiotap_oui[2]; | |
394 | *pos++ = status->vendor_radiotap_subns; | |
395 | put_unaligned_le16(status->vendor_radiotap_len, pos); | |
396 | pos += 2; | |
397 | /* align the actual payload as requested */ | |
398 | while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1)) | |
399 | *pos++ = 0; | |
400 | } | |
601ae7f2 BR |
401 | } |
402 | ||
b2e7771e JB |
403 | /* |
404 | * This function copies a received frame to all monitor interfaces and | |
405 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
406 | * radiotap header the driver might have added. | |
407 | */ | |
408 | static struct sk_buff * | |
409 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 410 | struct ieee80211_rate *rate) |
b2e7771e | 411 | { |
f1d58c25 | 412 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 413 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 414 | int needed_headroom; |
b2e7771e JB |
415 | struct sk_buff *skb, *skb2; |
416 | struct net_device *prev_dev = NULL; | |
417 | int present_fcs_len = 0; | |
b2e7771e JB |
418 | |
419 | /* | |
420 | * First, we may need to make a copy of the skb because | |
421 | * (1) we need to modify it for radiotap (if not present), and | |
422 | * (2) the other RX handlers will modify the skb we got. | |
423 | * | |
424 | * We don't need to, of course, if we aren't going to return | |
425 | * the SKB because it has a bad FCS/PLCP checksum. | |
426 | */ | |
0869aea0 | 427 | |
b2e7771e JB |
428 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
429 | present_fcs_len = FCS_LEN; | |
430 | ||
605f1a5b JB |
431 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
432 | if (!pskb_may_pull(origskb, 2 + status->vendor_radiotap_len)) { | |
e3cf8b3f ZY |
433 | dev_kfree_skb(origskb); |
434 | return NULL; | |
435 | } | |
436 | ||
b2e7771e | 437 | if (!local->monitors) { |
0869aea0 | 438 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
439 | dev_kfree_skb(origskb); |
440 | return NULL; | |
441 | } | |
442 | ||
0869aea0 | 443 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
444 | } |
445 | ||
751413ea HS |
446 | /* room for the radiotap header based on driver features */ |
447 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
448 | ||
0869aea0 | 449 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
450 | /* only need to expand headroom if necessary */ |
451 | skb = origskb; | |
452 | origskb = NULL; | |
453 | ||
454 | /* | |
455 | * This shouldn't trigger often because most devices have an | |
456 | * RX header they pull before we get here, and that should | |
457 | * be big enough for our radiotap information. We should | |
458 | * probably export the length to drivers so that we can have | |
459 | * them allocate enough headroom to start with. | |
460 | */ | |
461 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 462 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
463 | dev_kfree_skb(skb); |
464 | return NULL; | |
465 | } | |
466 | } else { | |
467 | /* | |
468 | * Need to make a copy and possibly remove radiotap header | |
469 | * and FCS from the original. | |
470 | */ | |
471 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
472 | ||
0869aea0 | 473 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
474 | |
475 | if (!skb) | |
476 | return origskb; | |
477 | } | |
478 | ||
0869aea0 | 479 | /* prepend radiotap information */ |
973ef21a FF |
480 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
481 | true); | |
b2e7771e | 482 | |
ce3edf6d | 483 | skb_reset_mac_header(skb); |
b2e7771e JB |
484 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
485 | skb->pkt_type = PACKET_OTHERHOST; | |
486 | skb->protocol = htons(ETH_P_802_2); | |
487 | ||
488 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 489 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
490 | continue; |
491 | ||
3d30d949 MW |
492 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
493 | continue; | |
494 | ||
9607e6b6 | 495 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
496 | continue; |
497 | ||
b2e7771e JB |
498 | if (prev_dev) { |
499 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
500 | if (skb2) { | |
501 | skb2->dev = prev_dev; | |
5548a8a1 | 502 | netif_receive_skb(skb2); |
b2e7771e JB |
503 | } |
504 | } | |
505 | ||
506 | prev_dev = sdata->dev; | |
507 | sdata->dev->stats.rx_packets++; | |
508 | sdata->dev->stats.rx_bytes += skb->len; | |
509 | } | |
510 | ||
511 | if (prev_dev) { | |
512 | skb->dev = prev_dev; | |
5548a8a1 | 513 | netif_receive_skb(skb); |
b2e7771e JB |
514 | } else |
515 | dev_kfree_skb(skb); | |
516 | ||
517 | return origskb; | |
518 | } | |
519 | ||
5cf121c3 | 520 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 521 | { |
238f74a2 | 522 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 523 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 524 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
525 | |
526 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
527 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
528 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 529 | /* frame has qos control */ |
238f74a2 | 530 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 531 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 532 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
533 | |
534 | seqno_idx = tid; | |
535 | security_idx = tid; | |
6e0d114d | 536 | } else { |
1411f9b5 JB |
537 | /* |
538 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
539 | * | |
540 | * Sequence numbers for management frames, QoS data | |
541 | * frames with a broadcast/multicast address in the | |
542 | * Address 1 field, and all non-QoS data frames sent | |
543 | * by QoS STAs are assigned using an additional single | |
544 | * modulo-4096 counter, [...] | |
545 | * | |
546 | * We also use that counter for non-QoS STAs. | |
547 | */ | |
5a306f58 | 548 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
549 | security_idx = 0; |
550 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 551 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 552 | tid = 0; |
6e0d114d | 553 | } |
52865dfd | 554 | |
9e26297a JB |
555 | rx->seqno_idx = seqno_idx; |
556 | rx->security_idx = security_idx; | |
6e0d114d JB |
557 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
558 | * For now, set skb->priority to 0 for other cases. */ | |
559 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 560 | } |
6e0d114d | 561 | |
d1c3a37c JB |
562 | /** |
563 | * DOC: Packet alignment | |
564 | * | |
565 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
566 | * to the stack. | |
567 | * | |
568 | * Additionally, should, if possible, align the payload data in a way that | |
569 | * guarantees that the contained IP header is aligned to a four-byte | |
570 | * boundary. In the case of regular frames, this simply means aligning the | |
571 | * payload to a four-byte boundary (because either the IP header is directly | |
572 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
573 | * in front of it). If the payload data is not properly aligned and the |
574 | * architecture doesn't support efficient unaligned operations, mac80211 | |
575 | * will align the data. | |
d1c3a37c JB |
576 | * |
577 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
578 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
579 | * push the IP header further back to a multiple of four again. Thankfully, the | |
580 | * specs were sane enough this time around to require padding each A-MSDU | |
581 | * subframe to a length that is a multiple of four. | |
582 | * | |
25985edc | 583 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
584 | * the payload is not supported, the driver is required to move the 802.11 |
585 | * header to be directly in front of the payload in that case. | |
586 | */ | |
587 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 588 | { |
59d9cb07 KV |
589 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
590 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
591 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 592 | #endif |
6e0d114d JB |
593 | } |
594 | ||
6368e4b1 | 595 | |
571ecf67 JB |
596 | /* rx handlers */ |
597 | ||
3cfcf6ac JM |
598 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
599 | { | |
600 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
601 | ||
602 | if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1)) | |
603 | return 0; | |
604 | ||
605 | return ieee80211_is_robust_mgmt_frame(hdr); | |
606 | } | |
607 | ||
608 | ||
609 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
610 | { | |
611 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
612 | ||
613 | if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1)) | |
614 | return 0; | |
615 | ||
616 | return ieee80211_is_robust_mgmt_frame(hdr); | |
617 | } | |
618 | ||
619 | ||
620 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
621 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
622 | { | |
623 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
624 | struct ieee80211_mmie *mmie; | |
625 | ||
1df332e8 | 626 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
627 | return -1; |
628 | ||
629 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr)) | |
630 | return -1; /* not a robust management frame */ | |
631 | ||
632 | mmie = (struct ieee80211_mmie *) | |
633 | (skb->data + skb->len - sizeof(*mmie)); | |
634 | if (mmie->element_id != WLAN_EID_MMIE || | |
635 | mmie->length != sizeof(*mmie) - 2) | |
636 | return -1; | |
637 | ||
638 | return le16_to_cpu(mmie->key_id); | |
639 | } | |
640 | ||
1df332e8 | 641 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 642 | { |
a7767f95 | 643 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 644 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 645 | |
a7767f95 | 646 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
647 | if (is_multicast_ether_addr(hdr->addr1)) { |
648 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 649 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 650 | return RX_DROP_MONITOR; |
b203ca39 | 651 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
652 | return RX_DROP_MONITOR; |
653 | } else { | |
654 | if (!ieee80211_has_a4(hdr->frame_control)) | |
655 | return RX_DROP_MONITOR; | |
b203ca39 | 656 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
657 | return RX_DROP_MONITOR; |
658 | } | |
33b64eb2 LCC |
659 | } |
660 | ||
661 | /* If there is not an established peer link and this is not a peer link | |
662 | * establisment frame, beacon or probe, drop the frame. | |
663 | */ | |
664 | ||
57cf8043 | 665 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 666 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 667 | |
a7767f95 | 668 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
669 | return RX_DROP_MONITOR; |
670 | ||
a7767f95 | 671 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 672 | u8 category; |
9b395bc3 JB |
673 | |
674 | /* make sure category field is present */ | |
675 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
676 | return RX_DROP_MONITOR; | |
677 | ||
33b64eb2 | 678 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
679 | category = mgmt->u.action.category; |
680 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 681 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 682 | return RX_DROP_MONITOR; |
33b64eb2 | 683 | return RX_CONTINUE; |
33b64eb2 LCC |
684 | } |
685 | ||
a7767f95 HH |
686 | if (ieee80211_is_probe_req(hdr->frame_control) || |
687 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
688 | ieee80211_is_beacon(hdr->frame_control) || |
689 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
690 | return RX_CONTINUE; |
691 | ||
692 | return RX_DROP_MONITOR; | |
a7767f95 HH |
693 | } |
694 | ||
902acc78 JB |
695 | return RX_CONTINUE; |
696 | } | |
33b64eb2 | 697 | |
d3b2fb53 | 698 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 699 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
700 | int index, |
701 | struct sk_buff_head *frames) | |
1edfb1af | 702 | { |
1edfb1af | 703 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 704 | struct ieee80211_rx_status *status; |
1edfb1af | 705 | |
dd318575 JB |
706 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
707 | ||
1edfb1af JB |
708 | if (!skb) |
709 | goto no_frame; | |
710 | ||
071d9ac2 | 711 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
712 | tid_agg_rx->stored_mpdu_num--; |
713 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
714 | status = IEEE80211_SKB_RXCB(skb); |
715 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
f9e124fb | 716 | __skb_queue_tail(frames, skb); |
1edfb1af JB |
717 | |
718 | no_frame: | |
9a886586 | 719 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
720 | } |
721 | ||
d3b2fb53 | 722 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 723 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
724 | u16 head_seq_num, |
725 | struct sk_buff_head *frames) | |
1edfb1af JB |
726 | { |
727 | int index; | |
728 | ||
dd318575 JB |
729 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
730 | ||
9a886586 JB |
731 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
732 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, | |
733 | tid_agg_rx->ssn) % | |
1edfb1af | 734 | tid_agg_rx->buf_size; |
f9e124fb CL |
735 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
736 | frames); | |
1edfb1af JB |
737 | } |
738 | } | |
739 | ||
740 | /* | |
741 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
742 | * the skb was added to the buffer longer than this time ago, the earlier | |
743 | * frames that have not yet been received are assumed to be lost and the skb | |
744 | * can be released for processing. This may also release other skb's from the | |
745 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
746 | * |
747 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
748 | */ |
749 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
750 | ||
d3b2fb53 | 751 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
752 | struct tid_ampdu_rx *tid_agg_rx, |
753 | struct sk_buff_head *frames) | |
aa0c8636 | 754 | { |
2bff8ebf | 755 | int index, j; |
aa0c8636 | 756 | |
dd318575 JB |
757 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
758 | ||
aa0c8636 | 759 | /* release the buffer until next missing frame */ |
9a886586 JB |
760 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
761 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
aa0c8636 | 762 | if (!tid_agg_rx->reorder_buf[index] && |
07ae2dfc | 763 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
764 | /* |
765 | * No buffers ready to be released, but check whether any | |
766 | * frames in the reorder buffer have timed out. | |
767 | */ | |
aa0c8636 CL |
768 | int skipped = 1; |
769 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
770 | j = (j + 1) % tid_agg_rx->buf_size) { | |
771 | if (!tid_agg_rx->reorder_buf[j]) { | |
772 | skipped++; | |
773 | continue; | |
774 | } | |
499fe9a4 DH |
775 | if (skipped && |
776 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 777 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 778 | goto set_release_timer; |
aa0c8636 | 779 | |
bdcbd8e0 JB |
780 | ht_dbg_ratelimited(sdata, |
781 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
782 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
783 | frames); | |
aa0c8636 CL |
784 | |
785 | /* | |
786 | * Increment the head seq# also for the skipped slots. | |
787 | */ | |
788 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
789 | (tid_agg_rx->head_seq_num + |
790 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
791 | skipped = 0; |
792 | } | |
793 | } else while (tid_agg_rx->reorder_buf[index]) { | |
f9e124fb CL |
794 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
795 | frames); | |
9a886586 JB |
796 | index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
797 | tid_agg_rx->ssn) % | |
aa0c8636 CL |
798 | tid_agg_rx->buf_size; |
799 | } | |
2bff8ebf CL |
800 | |
801 | if (tid_agg_rx->stored_mpdu_num) { | |
9a886586 JB |
802 | j = index = ieee80211_sn_sub(tid_agg_rx->head_seq_num, |
803 | tid_agg_rx->ssn) % | |
804 | tid_agg_rx->buf_size; | |
2bff8ebf CL |
805 | |
806 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
807 | j = (j + 1) % tid_agg_rx->buf_size) { | |
808 | if (tid_agg_rx->reorder_buf[j]) | |
809 | break; | |
810 | } | |
811 | ||
812 | set_release_timer: | |
813 | ||
814 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 815 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
816 | HT_RX_REORDER_BUF_TIMEOUT); |
817 | } else { | |
818 | del_timer(&tid_agg_rx->reorder_timer); | |
819 | } | |
aa0c8636 CL |
820 | } |
821 | ||
1edfb1af JB |
822 | /* |
823 | * As this function belongs to the RX path it must be under | |
824 | * rcu_read_lock protection. It returns false if the frame | |
825 | * can be processed immediately, true if it was consumed. | |
826 | */ | |
d3b2fb53 | 827 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 828 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
829 | struct sk_buff *skb, |
830 | struct sk_buff_head *frames) | |
1edfb1af JB |
831 | { |
832 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
833 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
834 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
835 | u16 head_seq_num, buf_size; | |
836 | int index; | |
2bff8ebf | 837 | bool ret = true; |
1edfb1af | 838 | |
dd318575 JB |
839 | spin_lock(&tid_agg_rx->reorder_lock); |
840 | ||
1edfb1af JB |
841 | buf_size = tid_agg_rx->buf_size; |
842 | head_seq_num = tid_agg_rx->head_seq_num; | |
843 | ||
844 | /* frame with out of date sequence number */ | |
9a886586 | 845 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 846 | dev_kfree_skb(skb); |
2bff8ebf | 847 | goto out; |
1edfb1af JB |
848 | } |
849 | ||
850 | /* | |
851 | * If frame the sequence number exceeds our buffering window | |
852 | * size release some previous frames to make room for this one. | |
853 | */ | |
9a886586 JB |
854 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
855 | head_seq_num = ieee80211_sn_inc( | |
856 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 857 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 858 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 859 | head_seq_num, frames); |
1edfb1af JB |
860 | } |
861 | ||
862 | /* Now the new frame is always in the range of the reordering buffer */ | |
863 | ||
9a886586 JB |
864 | index = ieee80211_sn_sub(mpdu_seq_num, |
865 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
1edfb1af JB |
866 | |
867 | /* check if we already stored this frame */ | |
868 | if (tid_agg_rx->reorder_buf[index]) { | |
869 | dev_kfree_skb(skb); | |
2bff8ebf | 870 | goto out; |
1edfb1af JB |
871 | } |
872 | ||
873 | /* | |
874 | * If the current MPDU is in the right order and nothing else | |
875 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
876 | * If it is first but there's something stored, we may be able |
877 | * to release frames after this one. | |
1edfb1af JB |
878 | */ |
879 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
880 | tid_agg_rx->stored_mpdu_num == 0) { | |
9a886586 JB |
881 | tid_agg_rx->head_seq_num = |
882 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
883 | ret = false; |
884 | goto out; | |
1edfb1af JB |
885 | } |
886 | ||
887 | /* put the frame in the reordering buffer */ | |
888 | tid_agg_rx->reorder_buf[index] = skb; | |
889 | tid_agg_rx->reorder_time[index] = jiffies; | |
890 | tid_agg_rx->stored_mpdu_num++; | |
f9e124fb | 891 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
1edfb1af | 892 | |
2bff8ebf CL |
893 | out: |
894 | spin_unlock(&tid_agg_rx->reorder_lock); | |
895 | return ret; | |
1edfb1af JB |
896 | } |
897 | ||
898 | /* | |
899 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
900 | * true if the MPDU was buffered, false if it should be processed. | |
901 | */ | |
f9e124fb CL |
902 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
903 | struct sk_buff_head *frames) | |
1edfb1af | 904 | { |
2569a826 JB |
905 | struct sk_buff *skb = rx->skb; |
906 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 907 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 908 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 909 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
910 | struct tid_ampdu_rx *tid_agg_rx; |
911 | u16 sc; | |
6cc00d54 | 912 | u8 tid, ack_policy; |
1edfb1af JB |
913 | |
914 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
2569a826 | 915 | goto dont_reorder; |
1edfb1af JB |
916 | |
917 | /* | |
918 | * filter the QoS data rx stream according to | |
919 | * STA/TID and check if this STA/TID is on aggregation | |
920 | */ | |
921 | ||
1edfb1af | 922 | if (!sta) |
2569a826 | 923 | goto dont_reorder; |
1edfb1af | 924 | |
6cc00d54 TP |
925 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
926 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
927 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
928 | ||
a87f736d JB |
929 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
930 | if (!tid_agg_rx) | |
931 | goto dont_reorder; | |
1edfb1af JB |
932 | |
933 | /* qos null data frames are excluded */ | |
934 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 935 | goto dont_reorder; |
1edfb1af | 936 | |
6cc00d54 TP |
937 | /* not part of a BA session */ |
938 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
939 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
940 | goto dont_reorder; | |
941 | ||
660c6a44 TP |
942 | /* not actually part of this BA session */ |
943 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
944 | goto dont_reorder; | |
945 | ||
1edfb1af JB |
946 | /* new, potentially un-ordered, ampdu frame - process it */ |
947 | ||
948 | /* reset session timer */ | |
949 | if (tid_agg_rx->timeout) | |
12d3952f | 950 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
951 | |
952 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
953 | sc = le16_to_cpu(hdr->seq_ctrl); | |
954 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 955 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
956 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
957 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 958 | return; |
1edfb1af JB |
959 | } |
960 | ||
a87f736d JB |
961 | /* |
962 | * No locking needed -- we will only ever process one | |
963 | * RX packet at a time, and thus own tid_agg_rx. All | |
964 | * other code manipulating it needs to (and does) make | |
965 | * sure that we cannot get to it any more before doing | |
966 | * anything with it. | |
967 | */ | |
f9e124fb CL |
968 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
969 | frames)) | |
2569a826 JB |
970 | return; |
971 | ||
972 | dont_reorder: | |
f9e124fb | 973 | __skb_queue_tail(frames, skb); |
1edfb1af | 974 | } |
33b64eb2 | 975 | |
49461622 | 976 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 977 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 978 | { |
a7767f95 | 979 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 980 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 JB |
981 | |
982 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
983 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 984 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 985 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 986 | hdr->seq_ctrl)) { |
554891e6 | 987 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
988 | rx->local->dot11FrameDuplicateCount++; |
989 | rx->sta->num_duplicates++; | |
990 | } | |
b1f93314 | 991 | return RX_DROP_UNUSABLE; |
571ecf67 | 992 | } else |
9e26297a | 993 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
571ecf67 JB |
994 | } |
995 | ||
571ecf67 JB |
996 | if (unlikely(rx->skb->len < 16)) { |
997 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 998 | return RX_DROP_MONITOR; |
571ecf67 JB |
999 | } |
1000 | ||
571ecf67 JB |
1001 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1002 | * IEEE 802.11, Chap 5.5. | |
1003 | * | |
ccd7b362 JB |
1004 | * mac80211 filters only based on association state, i.e. it drops |
1005 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1006 | * deauth/disassoc frames when needed. In addition, hostapd is |
1007 | * responsible for filtering on both auth and assoc states. | |
1008 | */ | |
33b64eb2 | 1009 | |
902acc78 | 1010 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1011 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1012 | |
a7767f95 HH |
1013 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1014 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1015 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1016 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 1017 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1018 | /* |
1019 | * accept port control frames from the AP even when it's not | |
1020 | * yet marked ASSOC to prevent a race where we don't set the | |
1021 | * assoc bit quickly enough before it sends the first frame | |
1022 | */ | |
1023 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1024 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1025 | unsigned int hdrlen; |
1026 | __be16 ethertype; | |
1027 | ||
1028 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1029 | ||
1030 | if (rx->skb->len < hdrlen + 8) | |
1031 | return RX_DROP_MONITOR; | |
1032 | ||
1033 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1034 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1035 | return RX_CONTINUE; |
1036 | } | |
21fc7560 JB |
1037 | |
1038 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1039 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1040 | hdr->addr2, | |
1041 | GFP_ATOMIC)) | |
1042 | return RX_DROP_UNUSABLE; | |
1043 | ||
e4c26add | 1044 | return RX_DROP_MONITOR; |
2a33bee2 | 1045 | } |
571ecf67 | 1046 | |
9ae54c84 | 1047 | return RX_CONTINUE; |
570bd537 JB |
1048 | } |
1049 | ||
1050 | ||
572e0012 KV |
1051 | static ieee80211_rx_result debug_noinline |
1052 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1053 | { | |
1054 | struct ieee80211_local *local; | |
1055 | struct ieee80211_hdr *hdr; | |
1056 | struct sk_buff *skb; | |
1057 | ||
1058 | local = rx->local; | |
1059 | skb = rx->skb; | |
1060 | hdr = (struct ieee80211_hdr *) skb->data; | |
1061 | ||
1062 | if (!local->pspolling) | |
1063 | return RX_CONTINUE; | |
1064 | ||
1065 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1066 | /* this is not from AP */ | |
1067 | return RX_CONTINUE; | |
1068 | ||
1069 | if (!ieee80211_is_data(hdr->frame_control)) | |
1070 | return RX_CONTINUE; | |
1071 | ||
1072 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1073 | /* AP has no more frames buffered for us */ | |
1074 | local->pspolling = false; | |
1075 | return RX_CONTINUE; | |
1076 | } | |
1077 | ||
1078 | /* more data bit is set, let's request a new frame from the AP */ | |
1079 | ieee80211_send_pspoll(local, rx->sdata); | |
1080 | ||
1081 | return RX_CONTINUE; | |
1082 | } | |
1083 | ||
d012a605 | 1084 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1085 | { |
133b8226 | 1086 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1087 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1088 | struct ps_data *ps; |
0795af57 | 1089 | |
d012a605 MP |
1090 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1091 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1092 | ps = &sdata->bss->ps; | |
1093 | else | |
1094 | return; | |
1095 | ||
1096 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1097 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1098 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1099 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1100 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1101 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1102 | } |
1103 | ||
d012a605 | 1104 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1105 | { |
bdcbd8e0 JB |
1106 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1107 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1108 | |
c2c98fde | 1109 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
bdcbd8e0 JB |
1110 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1111 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1112 | return; |
1113 | } | |
1114 | ||
1115 | ieee80211_sta_ps_deliver_wakeup(sta); | |
571ecf67 JB |
1116 | } |
1117 | ||
d057e5a3 AN |
1118 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1119 | { | |
1120 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1121 | bool in_ps; | |
1122 | ||
1123 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1124 | ||
1125 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1126 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1127 | if ((start && in_ps) || (!start && !in_ps)) |
1128 | return -EINVAL; | |
1129 | ||
1130 | if (start) | |
d012a605 | 1131 | sta_ps_start(sta_inf); |
d057e5a3 | 1132 | else |
d012a605 | 1133 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1134 | |
1135 | return 0; | |
1136 | } | |
1137 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1138 | ||
47086fc5 JB |
1139 | static ieee80211_rx_result debug_noinline |
1140 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1141 | { | |
1142 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1143 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1144 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1145 | int tid, ac; | |
1146 | ||
1147 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1148 | return RX_CONTINUE; | |
1149 | ||
1150 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1151 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1152 | return RX_CONTINUE; | |
1153 | ||
1154 | /* | |
1155 | * The device handles station powersave, so don't do anything about | |
1156 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1157 | * it to mac80211 since they're handled.) | |
1158 | */ | |
1159 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1160 | return RX_CONTINUE; | |
1161 | ||
1162 | /* | |
1163 | * Don't do anything if the station isn't already asleep. In | |
1164 | * the uAPSD case, the station will probably be marked asleep, | |
1165 | * in the PS-Poll case the station must be confused ... | |
1166 | */ | |
c2c98fde | 1167 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1168 | return RX_CONTINUE; |
1169 | ||
1170 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1171 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1172 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1173 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1174 | else | |
c2c98fde | 1175 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1176 | } |
47086fc5 JB |
1177 | |
1178 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1179 | * count as an dropped frame. */ | |
1180 | dev_kfree_skb(rx->skb); | |
1181 | ||
1182 | return RX_QUEUED; | |
1183 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1184 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1185 | ieee80211_has_pm(hdr->frame_control) && | |
1186 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1187 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1188 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1189 | ac = ieee802_1d_to_ac[tid & 7]; | |
1190 | ||
1191 | /* | |
1192 | * If this AC is not trigger-enabled do nothing. | |
1193 | * | |
1194 | * NB: This could/should check a separate bitmap of trigger- | |
1195 | * enabled queues, but for now we only implement uAPSD w/o | |
1196 | * TSPEC changes to the ACs, so they're always the same. | |
1197 | */ | |
1198 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1199 | return RX_CONTINUE; | |
1200 | ||
1201 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1202 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1203 | return RX_CONTINUE; |
1204 | ||
c2c98fde | 1205 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1206 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1207 | else | |
c2c98fde | 1208 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1209 | } |
1210 | ||
1211 | return RX_CONTINUE; | |
1212 | } | |
1213 | ||
49461622 | 1214 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1215 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1216 | { |
1217 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1218 | struct sk_buff *skb = rx->skb; |
1219 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1220 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1221 | int i; |
571ecf67 JB |
1222 | |
1223 | if (!sta) | |
9ae54c84 | 1224 | return RX_CONTINUE; |
571ecf67 | 1225 | |
b291ba11 JB |
1226 | /* |
1227 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1228 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1229 | * current IBSS network alive in cases where other STAs start | |
1230 | * using different BSSID. This will also give the station another | |
1231 | * chance to restart the authentication/authorization in case | |
1232 | * something went wrong the first time. | |
b291ba11 | 1233 | */ |
05c914fe | 1234 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1235 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1236 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1237 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1238 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1239 | sta->last_rx = jiffies; |
3af6334c FF |
1240 | if (ieee80211_is_data(hdr->frame_control)) { |
1241 | sta->last_rx_rate_idx = status->rate_idx; | |
1242 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1243 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1244 | } |
1245 | } | |
b291ba11 JB |
1246 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1247 | /* | |
33b64eb2 LCC |
1248 | * Mesh beacons will update last_rx when if they are found to |
1249 | * match the current local configuration when processed. | |
571ecf67 | 1250 | */ |
b291ba11 | 1251 | sta->last_rx = jiffies; |
3af6334c FF |
1252 | if (ieee80211_is_data(hdr->frame_control)) { |
1253 | sta->last_rx_rate_idx = status->rate_idx; | |
1254 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1255 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1256 | } |
571ecf67 JB |
1257 | } |
1258 | ||
554891e6 | 1259 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1260 | return RX_CONTINUE; |
571ecf67 | 1261 | |
3cf335d5 KV |
1262 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1263 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1264 | ||
571ecf67 JB |
1265 | sta->rx_fragments++; |
1266 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1267 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1268 | sta->last_signal = status->signal; | |
1269 | ewma_add(&sta->avg_signal, -status->signal); | |
1270 | } | |
571ecf67 | 1271 | |
ef0621e8 FF |
1272 | if (status->chains) { |
1273 | sta->chains = status->chains; | |
1274 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1275 | int signal = status->chain_signal[i]; | |
1276 | ||
1277 | if (!(status->chains & BIT(i))) | |
1278 | continue; | |
1279 | ||
1280 | sta->chain_signal_last[i] = signal; | |
1281 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1282 | } | |
1283 | } | |
1284 | ||
72eaa43a JB |
1285 | /* |
1286 | * Change STA power saving mode only at the end of a frame | |
1287 | * exchange sequence. | |
1288 | */ | |
d057e5a3 AN |
1289 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1290 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1291 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe JB |
1292 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
1293 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { | |
c2c98fde | 1294 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
72eaa43a JB |
1295 | /* |
1296 | * Ignore doze->wake transitions that are | |
1297 | * indicated by non-data frames, the standard | |
1298 | * is unclear here, but for example going to | |
1299 | * PS mode and then scanning would cause a | |
1300 | * doze->wake transition for the probe request, | |
1301 | * and that is clearly undesirable. | |
1302 | */ | |
1303 | if (ieee80211_is_data(hdr->frame_control) && | |
1304 | !ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1305 | sta_ps_end(sta); |
72eaa43a JB |
1306 | } else { |
1307 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1308 | sta_ps_start(sta); |
72eaa43a | 1309 | } |
571ecf67 JB |
1310 | } |
1311 | ||
3f52b7e3 MP |
1312 | /* mesh power save support */ |
1313 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1314 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1315 | ||
22403def JB |
1316 | /* |
1317 | * Drop (qos-)data::nullfunc frames silently, since they | |
1318 | * are used only to control station power saving mode. | |
1319 | */ | |
1320 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1321 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1322 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1323 | |
1324 | /* | |
1325 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1326 | * that was not moved to a 4-addr STA vlan yet send |
1327 | * the event to userspace and for older hostapd drop | |
1328 | * the frame to the monitor interface. | |
d524215f FF |
1329 | */ |
1330 | if (ieee80211_has_a4(hdr->frame_control) && | |
1331 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1332 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1333 | !rx->sdata->u.vlan.sta))) { |
1334 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1335 | cfg80211_rx_unexpected_4addr_frame( | |
1336 | rx->sdata->dev, sta->sta.addr, | |
1337 | GFP_ATOMIC); | |
d524215f | 1338 | return RX_DROP_MONITOR; |
e7f4a940 | 1339 | } |
22403def JB |
1340 | /* |
1341 | * Update counter and free packet here to avoid | |
1342 | * counting this as a dropped packed. | |
1343 | */ | |
571ecf67 JB |
1344 | sta->rx_packets++; |
1345 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1346 | return RX_QUEUED; |
571ecf67 JB |
1347 | } |
1348 | ||
9ae54c84 | 1349 | return RX_CONTINUE; |
571ecf67 JB |
1350 | } /* ieee80211_rx_h_sta_process */ |
1351 | ||
86c228a7 JA |
1352 | static ieee80211_rx_result debug_noinline |
1353 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1354 | { | |
1355 | struct sk_buff *skb = rx->skb; | |
1356 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1357 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1358 | int keyidx; | |
1359 | int hdrlen; | |
1360 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1361 | struct ieee80211_key *sta_ptk = NULL; | |
1362 | int mmie_keyidx = -1; | |
1363 | __le16 fc; | |
1364 | ||
1365 | /* | |
1366 | * Key selection 101 | |
1367 | * | |
1368 | * There are four types of keys: | |
1369 | * - GTK (group keys) | |
1370 | * - IGTK (group keys for management frames) | |
1371 | * - PTK (pairwise keys) | |
1372 | * - STK (station-to-station pairwise keys) | |
1373 | * | |
1374 | * When selecting a key, we have to distinguish between multicast | |
1375 | * (including broadcast) and unicast frames, the latter can only | |
1376 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1377 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1378 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1379 | * don't have a PTK/STK we check the key index for a WEP key. | |
1380 | * | |
1381 | * Note that in a regular BSS, multicast frames are sent by the | |
1382 | * AP only, associated stations unicast the frame to the AP first | |
1383 | * which then multicasts it on their behalf. | |
1384 | * | |
1385 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1386 | * with each station, that is something we don't currently handle. | |
1387 | * The spec seems to expect that one negotiates the same key with | |
1388 | * every station but there's no such requirement; VLANs could be | |
1389 | * possible. | |
1390 | */ | |
1391 | ||
1392 | /* | |
1393 | * No point in finding a key and decrypting if the frame is neither | |
1394 | * addressed to us nor a multicast frame. | |
1395 | */ | |
1396 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1397 | return RX_CONTINUE; | |
1398 | ||
1399 | /* start without a key */ | |
1400 | rx->key = NULL; | |
1401 | ||
1402 | if (rx->sta) | |
1403 | sta_ptk = rcu_dereference(rx->sta->ptk); | |
1404 | ||
1405 | fc = hdr->frame_control; | |
1406 | ||
1407 | if (!ieee80211_has_protected(fc)) | |
1408 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1409 | ||
1410 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1411 | rx->key = sta_ptk; | |
1412 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1413 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1414 | return RX_CONTINUE; | |
1415 | /* Skip decryption if the frame is not protected. */ | |
1416 | if (!ieee80211_has_protected(fc)) | |
1417 | return RX_CONTINUE; | |
1418 | } else if (mmie_keyidx >= 0) { | |
1419 | /* Broadcast/multicast robust management frame / BIP */ | |
1420 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1421 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1422 | return RX_CONTINUE; | |
1423 | ||
1424 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1425 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1426 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1427 | if (rx->sta) | |
1428 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1429 | if (!rx->key) | |
1430 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1431 | } else if (!ieee80211_has_protected(fc)) { | |
1432 | /* | |
1433 | * The frame was not protected, so skip decryption. However, we | |
1434 | * need to set rx->key if there is a key that could have been | |
1435 | * used so that the frame may be dropped if encryption would | |
1436 | * have been expected. | |
1437 | */ | |
1438 | struct ieee80211_key *key = NULL; | |
1439 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1440 | int i; | |
1441 | ||
1442 | if (ieee80211_is_mgmt(fc) && | |
1443 | is_multicast_ether_addr(hdr->addr1) && | |
1444 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1445 | rx->key = key; | |
1446 | else { | |
1447 | if (rx->sta) { | |
1448 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1449 | key = rcu_dereference(rx->sta->gtk[i]); | |
1450 | if (key) | |
1451 | break; | |
1452 | } | |
1453 | } | |
1454 | if (!key) { | |
1455 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1456 | key = rcu_dereference(sdata->keys[i]); | |
1457 | if (key) | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | if (key) | |
1462 | rx->key = key; | |
1463 | } | |
1464 | return RX_CONTINUE; | |
1465 | } else { | |
1466 | u8 keyid; | |
1467 | /* | |
1468 | * The device doesn't give us the IV so we won't be | |
1469 | * able to look up the key. That's ok though, we | |
1470 | * don't need to decrypt the frame, we just won't | |
1471 | * be able to keep statistics accurate. | |
1472 | * Except for key threshold notifications, should | |
1473 | * we somehow allow the driver to tell us which key | |
1474 | * the hardware used if this flag is set? | |
1475 | */ | |
1476 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1477 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1478 | return RX_CONTINUE; | |
1479 | ||
1480 | hdrlen = ieee80211_hdrlen(fc); | |
1481 | ||
1482 | if (rx->skb->len < 8 + hdrlen) | |
1483 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1484 | ||
1485 | /* | |
1486 | * no need to call ieee80211_wep_get_keyidx, | |
1487 | * it verifies a bunch of things we've done already | |
1488 | */ | |
1489 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1490 | keyidx = keyid >> 6; | |
1491 | ||
1492 | /* check per-station GTK first, if multicast packet */ | |
1493 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1494 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1495 | ||
1496 | /* if not found, try default key */ | |
1497 | if (!rx->key) { | |
1498 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1499 | ||
1500 | /* | |
1501 | * RSNA-protected unicast frames should always be | |
1502 | * sent with pairwise or station-to-station keys, | |
1503 | * but for WEP we allow using a key index as well. | |
1504 | */ | |
1505 | if (rx->key && | |
1506 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1507 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1508 | !is_multicast_ether_addr(hdr->addr1)) | |
1509 | rx->key = NULL; | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | if (rx->key) { | |
1514 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1515 | return RX_DROP_MONITOR; | |
1516 | ||
1517 | rx->key->tx_rx_count++; | |
1518 | /* TODO: add threshold stuff again */ | |
1519 | } else { | |
1520 | return RX_DROP_MONITOR; | |
1521 | } | |
1522 | ||
1523 | switch (rx->key->conf.cipher) { | |
1524 | case WLAN_CIPHER_SUITE_WEP40: | |
1525 | case WLAN_CIPHER_SUITE_WEP104: | |
1526 | result = ieee80211_crypto_wep_decrypt(rx); | |
1527 | break; | |
1528 | case WLAN_CIPHER_SUITE_TKIP: | |
1529 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1530 | break; | |
1531 | case WLAN_CIPHER_SUITE_CCMP: | |
1532 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1533 | break; | |
1534 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1535 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1536 | break; | |
1537 | default: | |
1538 | /* | |
1539 | * We can reach here only with HW-only algorithms | |
1540 | * but why didn't it decrypt the frame?! | |
1541 | */ | |
1542 | return RX_DROP_UNUSABLE; | |
1543 | } | |
1544 | ||
1545 | /* the hdr variable is invalid after the decrypt handlers */ | |
1546 | ||
1547 | /* either the frame has been decrypted or will be dropped */ | |
1548 | status->flag |= RX_FLAG_DECRYPTED; | |
1549 | ||
1550 | return result; | |
1551 | } | |
1552 | ||
571ecf67 JB |
1553 | static inline struct ieee80211_fragment_entry * |
1554 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1555 | unsigned int frag, unsigned int seq, int rx_queue, | |
1556 | struct sk_buff **skb) | |
1557 | { | |
1558 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1559 | |
571ecf67 JB |
1560 | entry = &sdata->fragments[sdata->fragment_next++]; |
1561 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1562 | sdata->fragment_next = 0; | |
1563 | ||
bdcbd8e0 | 1564 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1565 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1566 | |
1567 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1568 | *skb = NULL; | |
1569 | entry->first_frag_time = jiffies; | |
1570 | entry->seq = seq; | |
1571 | entry->rx_queue = rx_queue; | |
1572 | entry->last_frag = frag; | |
1573 | entry->ccmp = 0; | |
1574 | entry->extra_len = 0; | |
1575 | ||
1576 | return entry; | |
1577 | } | |
1578 | ||
1579 | static inline struct ieee80211_fragment_entry * | |
1580 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1581 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1582 | int rx_queue, struct ieee80211_hdr *hdr) |
1583 | { | |
1584 | struct ieee80211_fragment_entry *entry; | |
1585 | int i, idx; | |
1586 | ||
1587 | idx = sdata->fragment_next; | |
1588 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1589 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1590 | |
1591 | idx--; | |
1592 | if (idx < 0) | |
1593 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1594 | ||
1595 | entry = &sdata->fragments[idx]; | |
1596 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1597 | entry->rx_queue != rx_queue || | |
1598 | entry->last_frag + 1 != frag) | |
1599 | continue; | |
1600 | ||
b73d70ad | 1601 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1602 | |
b73d70ad HH |
1603 | /* |
1604 | * Check ftype and addresses are equal, else check next fragment | |
1605 | */ | |
1606 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1607 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1608 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1609 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1610 | continue; |
1611 | ||
ab46623e | 1612 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1613 | __skb_queue_purge(&entry->skb_list); |
1614 | continue; | |
1615 | } | |
1616 | return entry; | |
1617 | } | |
1618 | ||
1619 | return NULL; | |
1620 | } | |
1621 | ||
49461622 | 1622 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1623 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1624 | { |
1625 | struct ieee80211_hdr *hdr; | |
1626 | u16 sc; | |
358c8d9d | 1627 | __le16 fc; |
571ecf67 JB |
1628 | unsigned int frag, seq; |
1629 | struct ieee80211_fragment_entry *entry; | |
1630 | struct sk_buff *skb; | |
554891e6 | 1631 | struct ieee80211_rx_status *status; |
571ecf67 | 1632 | |
b73d70ad | 1633 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1634 | fc = hdr->frame_control; |
f7fbf70e JC |
1635 | |
1636 | if (ieee80211_is_ctl(fc)) | |
1637 | return RX_CONTINUE; | |
1638 | ||
571ecf67 JB |
1639 | sc = le16_to_cpu(hdr->seq_ctrl); |
1640 | frag = sc & IEEE80211_SCTL_FRAG; | |
1641 | ||
358c8d9d | 1642 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1643 | is_multicast_ether_addr(hdr->addr1))) { |
1644 | /* not fragmented */ | |
1645 | goto out; | |
1646 | } | |
1647 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1648 | ||
e3cf8b3f ZY |
1649 | if (skb_linearize(rx->skb)) |
1650 | return RX_DROP_UNUSABLE; | |
1651 | ||
058897a4 AK |
1652 | /* |
1653 | * skb_linearize() might change the skb->data and | |
1654 | * previously cached variables (in this case, hdr) need to | |
1655 | * be refreshed with the new data. | |
1656 | */ | |
1657 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1658 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1659 | ||
1660 | if (frag == 0) { | |
1661 | /* This is the first fragment of a new frame. */ | |
1662 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1663 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1664 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1665 | ieee80211_has_protected(fc)) { |
9e26297a | 1666 | int queue = rx->security_idx; |
571ecf67 JB |
1667 | /* Store CCMP PN so that we can verify that the next |
1668 | * fragment has a sequential PN value. */ | |
1669 | entry->ccmp = 1; | |
1670 | memcpy(entry->last_pn, | |
9190252c | 1671 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1672 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1673 | } |
9ae54c84 | 1674 | return RX_QUEUED; |
571ecf67 JB |
1675 | } |
1676 | ||
1677 | /* This is a fragment for a frame that should already be pending in | |
1678 | * fragment cache. Add this fragment to the end of the pending entry. | |
1679 | */ | |
9e26297a JB |
1680 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1681 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1682 | if (!entry) { |
1683 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1684 | return RX_DROP_MONITOR; |
571ecf67 JB |
1685 | } |
1686 | ||
1687 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1688 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1689 | if (entry->ccmp) { | |
1690 | int i; | |
4325f6ca | 1691 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1692 | int queue; |
97359d12 | 1693 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1694 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1695 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1696 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1697 | pn[i]++; |
1698 | if (pn[i]) | |
1699 | break; | |
1700 | } | |
9e26297a | 1701 | queue = rx->security_idx; |
9190252c | 1702 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1703 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1704 | return RX_DROP_UNUSABLE; |
4325f6ca | 1705 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1706 | } |
1707 | ||
358c8d9d | 1708 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1709 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1710 | entry->last_frag = frag; | |
1711 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1712 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1713 | rx->skb = NULL; |
9ae54c84 | 1714 | return RX_QUEUED; |
571ecf67 JB |
1715 | } |
1716 | ||
1717 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1718 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1719 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1720 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1721 | GFP_ATOMIC))) { | |
1722 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1723 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1724 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1725 | } |
1726 | } | |
1727 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1728 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1729 | dev_kfree_skb(skb); | |
1730 | } | |
1731 | ||
1732 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1733 | status = IEEE80211_SKB_RXCB(rx->skb); |
1734 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1735 | |
1736 | out: | |
1737 | if (rx->sta) | |
1738 | rx->sta->rx_packets++; | |
1739 | if (is_multicast_ether_addr(hdr->addr1)) | |
1740 | rx->local->dot11MulticastReceivedFrameCount++; | |
1741 | else | |
1742 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1743 | return RX_CONTINUE; |
571ecf67 JB |
1744 | } |
1745 | ||
1df332e8 | 1746 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1747 | { |
1df332e8 | 1748 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1749 | return -EACCES; |
571ecf67 | 1750 | |
76ee65bf | 1751 | return 0; |
571ecf67 JB |
1752 | } |
1753 | ||
1df332e8 | 1754 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1755 | { |
eb9fb5b8 JB |
1756 | struct sk_buff *skb = rx->skb; |
1757 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1758 | ||
3017b80b | 1759 | /* |
7848ba7d JB |
1760 | * Pass through unencrypted frames if the hardware has |
1761 | * decrypted them already. | |
3017b80b | 1762 | */ |
eb9fb5b8 | 1763 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1764 | return 0; |
571ecf67 JB |
1765 | |
1766 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1767 | if (unlikely(!ieee80211_has_protected(fc) && |
1768 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1769 | ieee80211_is_data(fc) && |
b3fc9c6c | 1770 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1771 | return -EACCES; |
bef5d1c7 JB |
1772 | |
1773 | return 0; | |
1774 | } | |
1775 | ||
1df332e8 | 1776 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1777 | { |
1778 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1779 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1780 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1781 | |
e3efca0a JM |
1782 | /* |
1783 | * Pass through unencrypted frames if the hardware has | |
1784 | * decrypted them already. | |
1785 | */ | |
1786 | if (status->flag & RX_FLAG_DECRYPTED) | |
1787 | return 0; | |
bef5d1c7 | 1788 | |
c2c98fde | 1789 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1790 | if (unlikely(!ieee80211_has_protected(fc) && |
1791 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1792 | rx->key)) { |
6ff57cf8 JB |
1793 | if (ieee80211_is_deauth(fc) || |
1794 | ieee80211_is_disassoc(fc)) | |
1795 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1796 | rx->skb->data, | |
1797 | rx->skb->len); | |
f2ca3ea4 | 1798 | return -EACCES; |
cf4e594e | 1799 | } |
f2ca3ea4 | 1800 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1801 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1802 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1803 | if (ieee80211_is_deauth(fc) || |
1804 | ieee80211_is_disassoc(fc)) | |
1805 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1806 | rx->skb->data, | |
1807 | rx->skb->len); | |
f2ca3ea4 | 1808 | return -EACCES; |
cf4e594e | 1809 | } |
f2ca3ea4 JM |
1810 | /* |
1811 | * When using MFP, Action frames are not allowed prior to | |
1812 | * having configured keys. | |
1813 | */ | |
1814 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
1815 | ieee80211_is_robust_mgmt_frame( | |
1816 | (struct ieee80211_hdr *) rx->skb->data))) | |
1817 | return -EACCES; | |
1818 | } | |
b3fc9c6c | 1819 | |
76ee65bf | 1820 | return 0; |
571ecf67 JB |
1821 | } |
1822 | ||
76ee65bf | 1823 | static int |
4114fa21 | 1824 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1825 | { |
eb9fb5b8 | 1826 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1827 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1828 | bool check_port_control = false; |
1829 | struct ethhdr *ehdr; | |
1830 | int ret; | |
f14543ee | 1831 | |
4114fa21 | 1832 | *port_control = false; |
9bc383de JB |
1833 | if (ieee80211_has_a4(hdr->frame_control) && |
1834 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1835 | return -1; |
9bc383de | 1836 | |
fbb327c5 FF |
1837 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1838 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1839 | ||
1840 | if (!sdata->u.mgd.use_4addr) | |
1841 | return -1; | |
1842 | else | |
1843 | check_port_control = true; | |
1844 | } | |
1845 | ||
9bc383de | 1846 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1847 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1848 | return -1; |
571ecf67 | 1849 | |
fbb327c5 | 1850 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1851 | if (ret < 0) |
fbb327c5 FF |
1852 | return ret; |
1853 | ||
1854 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1855 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1856 | *port_control = true; | |
1857 | else if (check_port_control) | |
fbb327c5 FF |
1858 | return -1; |
1859 | ||
1860 | return 0; | |
76ee65bf | 1861 | } |
571ecf67 | 1862 | |
ce3edf6d JB |
1863 | /* |
1864 | * requires that rx->skb is a frame with ethernet header | |
1865 | */ | |
358c8d9d | 1866 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1867 | { |
c97c23e3 | 1868 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1869 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1870 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1871 | ||
1872 | /* | |
1873 | * Allow EAPOL frames to us/the PAE group address regardless | |
1874 | * of whether the frame was encrypted or not. | |
1875 | */ | |
a621fa4d | 1876 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1877 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1878 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1879 | return true; |
1880 | ||
1881 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1882 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1883 | return false; |
1884 | ||
1885 | return true; | |
1886 | } | |
1887 | ||
1888 | /* | |
1889 | * requires that rx->skb is a frame with ethernet header | |
1890 | */ | |
76ee65bf | 1891 | static void |
5cf121c3 | 1892 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1893 | { |
eb9fb5b8 JB |
1894 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1895 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1896 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1897 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1898 | struct sta_info *dsta; | |
554891e6 | 1899 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1900 | |
76ee65bf RR |
1901 | skb = rx->skb; |
1902 | xmit_skb = NULL; | |
571ecf67 | 1903 | |
05c914fe JB |
1904 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1905 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1906 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1907 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1908 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1909 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1910 | /* | |
1911 | * send multicast frames both to higher layers in | |
1912 | * local net stack and back to the wireless medium | |
1913 | */ | |
76ee65bf | 1914 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1915 | if (!xmit_skb) |
bdcbd8e0 | 1916 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1917 | dev->name); |
571ecf67 | 1918 | } else { |
abe60632 JB |
1919 | dsta = sta_info_get(sdata, skb->data); |
1920 | if (dsta) { | |
ce3edf6d JB |
1921 | /* |
1922 | * The destination station is associated to | |
1923 | * this AP (in this VLAN), so send the frame | |
1924 | * directly to it and do not pass it to local | |
1925 | * net stack. | |
571ecf67 | 1926 | */ |
76ee65bf | 1927 | xmit_skb = skb; |
571ecf67 JB |
1928 | skb = NULL; |
1929 | } | |
571ecf67 JB |
1930 | } |
1931 | } | |
1932 | ||
1933 | if (skb) { | |
d1c3a37c JB |
1934 | int align __maybe_unused; |
1935 | ||
59d9cb07 | 1936 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
d1c3a37c JB |
1937 | /* |
1938 | * 'align' will only take the values 0 or 2 here | |
1939 | * since all frames are required to be aligned | |
1940 | * to 2-byte boundaries when being passed to | |
191922cd JB |
1941 | * mac80211; the code here works just as well if |
1942 | * that isn't true, but mac80211 assumes it can | |
1943 | * access fields as 2-byte aligned (e.g. for | |
1944 | * compare_ether_addr) | |
d1c3a37c | 1945 | */ |
dacb6f1d | 1946 | align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3; |
d1c3a37c JB |
1947 | if (align) { |
1948 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1949 | dev_kfree_skb(skb); | |
1950 | skb = NULL; | |
1951 | } else { | |
1952 | u8 *data = skb->data; | |
8ce0b589 ZY |
1953 | size_t len = skb_headlen(skb); |
1954 | skb->data -= align; | |
1955 | memmove(skb->data, data, len); | |
1956 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1957 | } |
1958 | } | |
1959 | #endif | |
1960 | ||
1961 | if (skb) { | |
1962 | /* deliver to local stack */ | |
1963 | skb->protocol = eth_type_trans(skb, dev); | |
1964 | memset(skb->cb, 0, sizeof(skb->cb)); | |
5548a8a1 | 1965 | netif_receive_skb(skb); |
d1c3a37c | 1966 | } |
571ecf67 JB |
1967 | } |
1968 | ||
76ee65bf | 1969 | if (xmit_skb) { |
aef6c928 HS |
1970 | /* |
1971 | * Send to wireless media and increase priority by 256 to | |
1972 | * keep the received priority instead of reclassifying | |
1973 | * the frame (see cfg80211_classify8021d). | |
1974 | */ | |
1975 | xmit_skb->priority += 256; | |
f831e909 | 1976 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1977 | skb_reset_network_header(xmit_skb); |
1978 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1979 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1980 | } |
76ee65bf RR |
1981 | } |
1982 | ||
49461622 | 1983 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1984 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 1985 | { |
eb9fb5b8 | 1986 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 1987 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
1988 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1989 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 1990 | struct sk_buff_head frame_list; |
554891e6 | 1991 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 1992 | |
358c8d9d | 1993 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 1994 | return RX_CONTINUE; |
fd4c7f2f | 1995 | |
358c8d9d | 1996 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 1997 | return RX_DROP_MONITOR; |
fd4c7f2f | 1998 | |
554891e6 | 1999 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2000 | return RX_CONTINUE; |
fd4c7f2f | 2001 | |
eaf85ca7 ZY |
2002 | if (ieee80211_has_a4(hdr->frame_control) && |
2003 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2004 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2005 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2006 | |
eaf85ca7 ZY |
2007 | if (is_multicast_ether_addr(hdr->addr1) && |
2008 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2009 | rx->sdata->u.vlan.sta) || | |
2010 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2011 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2012 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2013 | |
eaf85ca7 ZY |
2014 | skb->dev = dev; |
2015 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2016 | |
e3cf8b3f ZY |
2017 | if (skb_linearize(skb)) |
2018 | return RX_DROP_UNUSABLE; | |
2019 | ||
eaf85ca7 ZY |
2020 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2021 | rx->sdata->vif.type, | |
8b3becad | 2022 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2023 | |
eaf85ca7 ZY |
2024 | while (!skb_queue_empty(&frame_list)) { |
2025 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2026 | |
358c8d9d | 2027 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2028 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2029 | continue; |
2030 | } | |
eaf85ca7 ZY |
2031 | dev->stats.rx_packets++; |
2032 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2033 | |
2034 | ieee80211_deliver_skb(rx); | |
2035 | } | |
2036 | ||
9ae54c84 | 2037 | return RX_QUEUED; |
fd4c7f2f RR |
2038 | } |
2039 | ||
bf94e17b | 2040 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2041 | static ieee80211_rx_result |
e32f85f7 LCC |
2042 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2043 | { | |
30789eb6 TP |
2044 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2045 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2046 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2047 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2048 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2049 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2050 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2051 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
0cfda851 | 2052 | __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD); |
30789eb6 | 2053 | u16 q, hdrlen; |
e32f85f7 LCC |
2054 | |
2055 | hdr = (struct ieee80211_hdr *) skb->data; | |
2056 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2057 | |
2058 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2059 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2060 | return RX_DROP_MONITOR; | |
2061 | ||
2062 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2063 | ||
2064 | /* make sure full mesh header is there, also checks skb len */ | |
2065 | if (!pskb_may_pull(rx->skb, | |
2066 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2067 | return RX_DROP_MONITOR; | |
2068 | ||
2069 | /* reload pointers */ | |
2070 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2071 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2072 | ||
2157fdd6 TP |
2073 | /* frame is in RMC, don't forward */ |
2074 | if (ieee80211_is_data(hdr->frame_control) && | |
2075 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2076 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2077 | return RX_DROP_MONITOR; |
2078 | ||
555cb715 JC |
2079 | if (!ieee80211_is_data(hdr->frame_control) || |
2080 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2081 | return RX_CONTINUE; |
2082 | ||
2083 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2084 | return RX_DROP_MONITOR; |
2085 | ||
43b7b314 | 2086 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2087 | struct mesh_path *mppath; |
43b7b314 JC |
2088 | char *proxied_addr; |
2089 | char *mpp_addr; | |
2090 | ||
2091 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2092 | mpp_addr = hdr->addr3; | |
2093 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2094 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2095 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2096 | mpp_addr = hdr->addr4; |
2097 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2098 | } else { |
2099 | return RX_DROP_MONITOR; | |
43b7b314 | 2100 | } |
79617dee | 2101 | |
79617dee | 2102 | rcu_read_lock(); |
bf7cd94d | 2103 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2104 | if (!mppath) { |
bf7cd94d | 2105 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2106 | } else { |
2107 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2108 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2109 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2110 | spin_unlock_bh(&mppath->state_lock); |
2111 | } | |
2112 | rcu_read_unlock(); | |
2113 | } | |
2114 | ||
3c5772a5 JC |
2115 | /* Frame has reached destination. Don't forward */ |
2116 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2117 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2118 | return RX_CONTINUE; |
2119 | ||
00e96dec | 2120 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2121 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2122 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2123 | return RX_DROP_MONITOR; |
2124 | } | |
2125 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2126 | |
30789eb6 TP |
2127 | if (!--mesh_hdr->ttl) { |
2128 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2129 | goto out; |
30789eb6 TP |
2130 | } |
2131 | ||
d665508b CYY |
2132 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2133 | goto out; | |
2134 | ||
30789eb6 TP |
2135 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2136 | if (!fwd_skb) { | |
bdcbd8e0 | 2137 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2138 | sdata->name); |
30789eb6 TP |
2139 | goto out; |
2140 | } | |
2141 | ||
2142 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2143 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2144 | info = IEEE80211_SKB_CB(fwd_skb); |
2145 | memset(info, 0, sizeof(*info)); | |
2146 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2147 | info->control.vif = &rx->sdata->vif; | |
2148 | info->control.jiffies = jiffies; | |
2149 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2150 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2151 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2152 | /* update power mode indication when forwarding */ |
2153 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2154 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2155 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2156 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2157 | } else { | |
2158 | /* unable to resolve next hop */ | |
bf7cd94d JB |
2159 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
2160 | fwd_hdr->addr3, 0, reason, fwd_hdr->addr2); | |
30789eb6 | 2161 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2162 | kfree_skb(fwd_skb); |
30789eb6 | 2163 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2164 | } |
2165 | ||
30789eb6 TP |
2166 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2167 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2168 | out: |
3c5772a5 | 2169 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2170 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2171 | return RX_CONTINUE; |
2172 | else | |
2173 | return RX_DROP_MONITOR; | |
2174 | } | |
bf94e17b | 2175 | #endif |
e32f85f7 | 2176 | |
49461622 | 2177 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2178 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2179 | { |
eb9fb5b8 | 2180 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2181 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2182 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2183 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2184 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2185 | bool port_control; |
ce3edf6d | 2186 | int err; |
76ee65bf | 2187 | |
358c8d9d | 2188 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2189 | return RX_CONTINUE; |
76ee65bf | 2190 | |
358c8d9d | 2191 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2192 | return RX_DROP_MONITOR; |
76ee65bf | 2193 | |
f14543ee | 2194 | /* |
e7f4a940 JB |
2195 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2196 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2197 | */ |
2198 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2199 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2200 | if (rx->sta && | |
2201 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2202 | cfg80211_rx_unexpected_4addr_frame( | |
2203 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2204 | return RX_DROP_MONITOR; |
e7f4a940 | 2205 | } |
f14543ee | 2206 | |
4114fa21 | 2207 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2208 | if (unlikely(err)) |
e4c26add | 2209 | return RX_DROP_UNUSABLE; |
76ee65bf | 2210 | |
358c8d9d | 2211 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2212 | return RX_DROP_MONITOR; |
ce3edf6d | 2213 | |
4114fa21 FF |
2214 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2215 | unlikely(port_control) && sdata->bss) { | |
2216 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2217 | u.ap); | |
2218 | dev = sdata->dev; | |
2219 | rx->sdata = sdata; | |
2220 | } | |
2221 | ||
76ee65bf RR |
2222 | rx->skb->dev = dev; |
2223 | ||
2224 | dev->stats.rx_packets++; | |
2225 | dev->stats.rx_bytes += rx->skb->len; | |
2226 | ||
08ca944e | 2227 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2228 | !is_multicast_ether_addr( |
2229 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2230 | (!local->scanning && | |
2231 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2232 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2233 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2234 | } | |
2235 | ||
76ee65bf | 2236 | ieee80211_deliver_skb(rx); |
571ecf67 | 2237 | |
9ae54c84 | 2238 | return RX_QUEUED; |
571ecf67 JB |
2239 | } |
2240 | ||
49461622 | 2241 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2242 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2243 | { |
71364716 | 2244 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2245 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2246 | struct tid_ampdu_rx *tid_agg_rx; |
2247 | u16 start_seq_num; | |
2248 | u16 tid; | |
2249 | ||
a7767f95 | 2250 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2251 | return RX_CONTINUE; |
71364716 | 2252 | |
a7767f95 | 2253 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2254 | struct { |
2255 | __le16 control, start_seq_num; | |
2256 | } __packed bar_data; | |
2257 | ||
71364716 | 2258 | if (!rx->sta) |
a02ae758 | 2259 | return RX_DROP_MONITOR; |
8ae5977f JB |
2260 | |
2261 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2262 | &bar_data, sizeof(bar_data))) | |
2263 | return RX_DROP_MONITOR; | |
2264 | ||
8ae5977f | 2265 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2266 | |
2267 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2268 | if (!tid_agg_rx) | |
a02ae758 | 2269 | return RX_DROP_MONITOR; |
71364716 | 2270 | |
8ae5977f | 2271 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2272 | |
2273 | /* reset session timer */ | |
20ad19d0 JB |
2274 | if (tid_agg_rx->timeout) |
2275 | mod_timer(&tid_agg_rx->session_timer, | |
2276 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2277 | |
dd318575 | 2278 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2279 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2280 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2281 | start_seq_num, frames); |
dd318575 JB |
2282 | spin_unlock(&tid_agg_rx->reorder_lock); |
2283 | ||
a02ae758 JB |
2284 | kfree_skb(skb); |
2285 | return RX_QUEUED; | |
71364716 RR |
2286 | } |
2287 | ||
08daecae JB |
2288 | /* |
2289 | * After this point, we only want management frames, | |
2290 | * so we can drop all remaining control frames to | |
2291 | * cooked monitor interfaces. | |
2292 | */ | |
2293 | return RX_DROP_MONITOR; | |
71364716 RR |
2294 | } |
2295 | ||
f4f727a6 JM |
2296 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2297 | struct ieee80211_mgmt *mgmt, | |
2298 | size_t len) | |
fea14732 JM |
2299 | { |
2300 | struct ieee80211_local *local = sdata->local; | |
2301 | struct sk_buff *skb; | |
2302 | struct ieee80211_mgmt *resp; | |
2303 | ||
b203ca39 | 2304 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2305 | /* Not to own unicast address */ |
2306 | return; | |
2307 | } | |
2308 | ||
b203ca39 JP |
2309 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2310 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2311 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2312 | return; |
2313 | } | |
2314 | ||
2315 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2316 | /* Too short SA Query request frame */ | |
2317 | return; | |
2318 | } | |
2319 | ||
2320 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2321 | if (skb == NULL) | |
2322 | return; | |
2323 | ||
2324 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2325 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2326 | memset(resp, 0, 24); | |
2327 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2328 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2329 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2330 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2331 | IEEE80211_STYPE_ACTION); | |
2332 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2333 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2334 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2335 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2336 | mgmt->u.action.u.sa_query.trans_id, | |
2337 | WLAN_SA_QUERY_TR_ID_LEN); | |
2338 | ||
62ae67be | 2339 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2340 | } |
2341 | ||
2e161f78 JB |
2342 | static ieee80211_rx_result debug_noinline |
2343 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2344 | { | |
2345 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2346 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2347 | |
2348 | /* | |
2349 | * From here on, look only at management frames. | |
2350 | * Data and control frames are already handled, | |
2351 | * and unknown (reserved) frames are useless. | |
2352 | */ | |
2353 | if (rx->skb->len < 24) | |
2354 | return RX_DROP_MONITOR; | |
2355 | ||
2356 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2357 | return RX_DROP_MONITOR; | |
2358 | ||
ee971924 JB |
2359 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2360 | ieee80211_is_beacon(mgmt->frame_control) && | |
2361 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2362 | int sig = 0; |
2363 | ||
2364 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2365 | sig = status->signal; | |
2366 | ||
ee971924 JB |
2367 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2368 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2369 | status->freq, sig); |
ee971924 JB |
2370 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2371 | } | |
2372 | ||
554891e6 | 2373 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2374 | return RX_DROP_MONITOR; |
2375 | ||
2376 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2377 | return RX_DROP_UNUSABLE; | |
2378 | ||
2379 | return RX_CONTINUE; | |
2380 | } | |
2381 | ||
de1ede7a JB |
2382 | static ieee80211_rx_result debug_noinline |
2383 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2384 | { | |
2385 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2386 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2387 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2388 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2389 | int len = rx->skb->len; |
2390 | ||
2391 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2392 | return RX_CONTINUE; | |
2393 | ||
026331c4 JM |
2394 | /* drop too small frames */ |
2395 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2396 | return RX_DROP_UNUSABLE; |
de1ede7a | 2397 | |
815b8092 MP |
2398 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
2399 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED) | |
84040805 | 2400 | return RX_DROP_UNUSABLE; |
de1ede7a | 2401 | |
554891e6 | 2402 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2403 | return RX_DROP_UNUSABLE; |
97ebe12a | 2404 | |
de1ede7a | 2405 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2406 | case WLAN_CATEGORY_HT: |
2407 | /* reject HT action frames from stations not supporting HT */ | |
2408 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2409 | goto invalid; | |
2410 | ||
2411 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2412 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2413 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2414 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2415 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2416 | break; | |
2417 | ||
ec61cd63 | 2418 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2419 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2420 | goto invalid; | |
2421 | ||
2422 | switch (mgmt->u.action.u.ht_smps.action) { | |
2423 | case WLAN_HT_ACTION_SMPS: { | |
2424 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2425 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2426 | |
2427 | /* convert to HT capability */ | |
2428 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2429 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2430 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2431 | break; |
2432 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2433 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2434 | break; |
2435 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2436 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2437 | break; |
2438 | default: | |
2439 | goto invalid; | |
2440 | } | |
1d8d3dec JB |
2441 | |
2442 | /* if no change do nothing */ | |
af0ed69b | 2443 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2444 | goto handled; |
af0ed69b | 2445 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2446 | |
2447 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2448 | ||
64f68e5d JB |
2449 | rate_control_rate_update(local, sband, rx->sta, |
2450 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2451 | goto handled; |
2452 | } | |
ec61cd63 JB |
2453 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2454 | struct ieee80211_supported_band *sband; | |
2455 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2456 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2457 | |
2458 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2459 | if (!(rx->sta->sta.ht_cap.cap & |
2460 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2461 | goto handled; |
2462 | ||
e1a0c6b3 JB |
2463 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2464 | new_bw = IEEE80211_STA_RX_BW_20; | |
2465 | else | |
2466 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2467 | |
e1a0c6b3 | 2468 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2469 | goto handled; |
2470 | ||
ec61cd63 JB |
2471 | sband = rx->local->hw.wiphy->bands[status->band]; |
2472 | ||
2473 | rate_control_rate_update(local, sband, rx->sta, | |
2474 | IEEE80211_RC_BW_CHANGED); | |
2475 | goto handled; | |
2476 | } | |
1d8d3dec JB |
2477 | default: |
2478 | goto invalid; | |
2479 | } | |
2480 | ||
0af83d3d | 2481 | break; |
1b3a2e49 JB |
2482 | case WLAN_CATEGORY_PUBLIC: |
2483 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2484 | goto invalid; | |
2485 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2486 | break; | |
2487 | if (!rx->sta) | |
2488 | break; | |
2489 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2490 | break; | |
2491 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2492 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2493 | break; | |
2494 | if (len < offsetof(struct ieee80211_mgmt, | |
2495 | u.action.u.ext_chan_switch.variable)) | |
2496 | goto invalid; | |
2497 | goto queue; | |
0af83d3d JB |
2498 | case WLAN_CATEGORY_VHT: |
2499 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2500 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2501 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2502 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2503 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2504 | break; | |
2505 | ||
2506 | /* verify action code is present */ | |
2507 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2508 | goto invalid; | |
2509 | ||
2510 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2511 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2512 | u8 opmode; | |
2513 | ||
2514 | /* verify opmode is present */ | |
2515 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2516 | goto invalid; | |
2517 | ||
2518 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2519 | ||
2520 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2521 | opmode, status->band, |
2522 | false); | |
0af83d3d JB |
2523 | goto handled; |
2524 | } | |
2525 | default: | |
2526 | break; | |
2527 | } | |
1d8d3dec | 2528 | break; |
de1ede7a | 2529 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2530 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2531 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2532 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2533 | sdata->vif.type != NL80211_IFTYPE_AP && |
2534 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2535 | break; |
8abd3f9b | 2536 | |
026331c4 JM |
2537 | /* verify action_code is present */ |
2538 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2539 | break; | |
2540 | ||
de1ede7a JB |
2541 | switch (mgmt->u.action.u.addba_req.action_code) { |
2542 | case WLAN_ACTION_ADDBA_REQ: | |
2543 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2544 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2545 | goto invalid; |
2546 | break; | |
de1ede7a JB |
2547 | case WLAN_ACTION_ADDBA_RESP: |
2548 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2549 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2550 | goto invalid; |
2551 | break; | |
de1ede7a JB |
2552 | case WLAN_ACTION_DELBA: |
2553 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2554 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2555 | goto invalid; |
2556 | break; | |
2557 | default: | |
2558 | goto invalid; | |
de1ede7a | 2559 | } |
bed7ee6e | 2560 | |
8b58ff83 | 2561 | goto queue; |
39192c0b | 2562 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
4797c7ba | 2563 | if (status->band != IEEE80211_BAND_5GHZ) |
84040805 | 2564 | break; |
46900298 JB |
2565 | |
2566 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2567 | break; |
46900298 | 2568 | |
026331c4 JM |
2569 | /* verify action_code is present */ |
2570 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2571 | break; | |
2572 | ||
39192c0b JB |
2573 | switch (mgmt->u.action.u.measurement.action_code) { |
2574 | case WLAN_ACTION_SPCT_MSR_REQ: | |
2575 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2576 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2577 | break; |
39192c0b | 2578 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2579 | goto handled; |
c481ec97 | 2580 | case WLAN_ACTION_SPCT_CHL_SWITCH: |
cc32abd4 | 2581 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
84040805 | 2582 | break; |
cc32abd4 | 2583 | |
b203ca39 | 2584 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
84040805 | 2585 | break; |
c481ec97 | 2586 | |
8b58ff83 | 2587 | goto queue; |
39192c0b JB |
2588 | } |
2589 | break; | |
fea14732 JM |
2590 | case WLAN_CATEGORY_SA_QUERY: |
2591 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2592 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2593 | break; |
2594 | ||
fea14732 JM |
2595 | switch (mgmt->u.action.u.sa_query.action) { |
2596 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2597 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2598 | break; |
fea14732 | 2599 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2600 | goto handled; |
fea14732 JM |
2601 | } |
2602 | break; | |
8db09850 | 2603 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2604 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2605 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2606 | break; | |
2607 | ||
8db09850 TP |
2608 | switch (mgmt->u.action.u.self_prot.action_code) { |
2609 | case WLAN_SP_MESH_PEERING_OPEN: | |
2610 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2611 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2612 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2613 | goto invalid; | |
a6dad6a2 | 2614 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2615 | /* userspace handles this frame */ |
2616 | break; | |
2617 | goto queue; | |
2618 | case WLAN_SP_MGK_INFORM: | |
2619 | case WLAN_SP_MGK_ACK: | |
2620 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2621 | goto invalid; | |
2622 | break; | |
2623 | } | |
2624 | break; | |
d3aaec8a | 2625 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2626 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2627 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2628 | break; | |
2629 | ||
77a121c3 JB |
2630 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2631 | break; | |
25d49e4d | 2632 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2633 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2634 | break; |
2635 | goto queue; | |
84040805 | 2636 | } |
026331c4 | 2637 | |
2e161f78 JB |
2638 | return RX_CONTINUE; |
2639 | ||
bed7ee6e | 2640 | invalid: |
554891e6 | 2641 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2642 | /* will return in the next handlers */ |
2643 | return RX_CONTINUE; | |
2644 | ||
2645 | handled: | |
2646 | if (rx->sta) | |
2647 | rx->sta->rx_packets++; | |
2648 | dev_kfree_skb(rx->skb); | |
2649 | return RX_QUEUED; | |
2650 | ||
2651 | queue: | |
2652 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2653 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2654 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2655 | if (rx->sta) | |
2656 | rx->sta->rx_packets++; | |
2657 | return RX_QUEUED; | |
2658 | } | |
2659 | ||
2660 | static ieee80211_rx_result debug_noinline | |
2661 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2662 | { | |
554891e6 | 2663 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2664 | int sig = 0; |
2e161f78 JB |
2665 | |
2666 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2667 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2668 | return RX_CONTINUE; |
d7907448 | 2669 | |
026331c4 JM |
2670 | /* |
2671 | * Getting here means the kernel doesn't know how to handle | |
2672 | * it, but maybe userspace does ... include returned frames | |
2673 | * so userspace can register for those to know whether ones | |
2674 | * it transmitted were processed or returned. | |
2675 | */ | |
026331c4 | 2676 | |
804483e9 JB |
2677 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2678 | sig = status->signal; | |
2679 | ||
71bbc994 | 2680 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
2e161f78 JB |
2681 | rx->skb->data, rx->skb->len, |
2682 | GFP_ATOMIC)) { | |
2683 | if (rx->sta) | |
2684 | rx->sta->rx_packets++; | |
2685 | dev_kfree_skb(rx->skb); | |
2686 | return RX_QUEUED; | |
2687 | } | |
2688 | ||
2e161f78 JB |
2689 | return RX_CONTINUE; |
2690 | } | |
2691 | ||
2692 | static ieee80211_rx_result debug_noinline | |
2693 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2694 | { | |
2695 | struct ieee80211_local *local = rx->local; | |
2696 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2697 | struct sk_buff *nskb; | |
2698 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2699 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2700 | |
2701 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2702 | return RX_CONTINUE; | |
2703 | ||
2704 | /* | |
2705 | * For AP mode, hostapd is responsible for handling any action | |
2706 | * frames that we didn't handle, including returning unknown | |
2707 | * ones. For all other modes we will return them to the sender, | |
2708 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2709 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2710 | * Newer versions of hostapd shall also use the management frame |
2711 | * registration mechanisms, but older ones still use cooked | |
2712 | * monitor interfaces so push all frames there. | |
2713 | */ | |
554891e6 | 2714 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2715 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2716 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2717 | return RX_DROP_MONITOR; | |
026331c4 | 2718 | |
4b5ebccc JB |
2719 | if (is_multicast_ether_addr(mgmt->da)) |
2720 | return RX_DROP_MONITOR; | |
2721 | ||
84040805 JB |
2722 | /* do not return rejected action frames */ |
2723 | if (mgmt->u.action.category & 0x80) | |
2724 | return RX_DROP_UNUSABLE; | |
2725 | ||
2726 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2727 | GFP_ATOMIC); | |
2728 | if (nskb) { | |
292b4df6 | 2729 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2730 | |
292b4df6 JL |
2731 | nmgmt->u.action.category |= 0x80; |
2732 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2733 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2734 | |
2735 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2736 | ||
07e5a5f5 JB |
2737 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2738 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2739 | ||
2740 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2741 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2742 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2743 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2744 | info->hw_queue = | |
2745 | local->hw.offchannel_tx_hw_queue; | |
2746 | } | |
2747 | ||
2748 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2749 | status->band); | |
de1ede7a | 2750 | } |
39192c0b JB |
2751 | dev_kfree_skb(rx->skb); |
2752 | return RX_QUEUED; | |
de1ede7a JB |
2753 | } |
2754 | ||
49461622 | 2755 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2756 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2757 | { |
eb9fb5b8 | 2758 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2759 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2760 | __le16 stype; | |
571ecf67 | 2761 | |
77a121c3 | 2762 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2763 | |
77a121c3 JB |
2764 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2765 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2766 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2767 | return RX_DROP_MONITOR; | |
472dbc45 | 2768 | |
77a121c3 | 2769 | switch (stype) { |
66e67e41 | 2770 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2771 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2772 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2773 | /* process for all: mesh, mlme, ibss */ | |
2774 | break; | |
66e67e41 JB |
2775 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2776 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2777 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2778 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2779 | if (is_multicast_ether_addr(mgmt->da) && |
2780 | !is_broadcast_ether_addr(mgmt->da)) | |
2781 | return RX_DROP_MONITOR; | |
2782 | ||
77a121c3 JB |
2783 | /* process only for station */ |
2784 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2785 | return RX_DROP_MONITOR; | |
2786 | break; | |
2787 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2788 | /* process only for ibss and mesh */ |
2789 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2790 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2791 | return RX_DROP_MONITOR; |
2792 | break; | |
2793 | default: | |
2794 | return RX_DROP_MONITOR; | |
2795 | } | |
f9d540ee | 2796 | |
77a121c3 | 2797 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2798 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2799 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2800 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2801 | if (rx->sta) |
2802 | rx->sta->rx_packets++; | |
46900298 | 2803 | |
77a121c3 | 2804 | return RX_QUEUED; |
571ecf67 JB |
2805 | } |
2806 | ||
5cf121c3 | 2807 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2808 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2809 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2810 | { |
2811 | struct ieee80211_sub_if_data *sdata; | |
2812 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2813 | struct sk_buff *skb = rx->skb, *skb2; |
2814 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2815 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2816 | int needed_headroom; |
3d30d949 | 2817 | |
554891e6 JB |
2818 | /* |
2819 | * If cooked monitor has been processed already, then | |
2820 | * don't do it again. If not, set the flag. | |
2821 | */ | |
2822 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2823 | goto out_free_skb; |
554891e6 | 2824 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2825 | |
152c477a JB |
2826 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2827 | if (!local->cooked_mntrs) | |
2828 | goto out_free_skb; | |
2829 | ||
293702a3 | 2830 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2831 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2832 | |
293702a3 JB |
2833 | if (skb_headroom(skb) < needed_headroom && |
2834 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2835 | goto out_free_skb; | |
3d30d949 | 2836 | |
293702a3 | 2837 | /* prepend radiotap information */ |
973ef21a FF |
2838 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2839 | false); | |
3d30d949 MW |
2840 | |
2841 | skb_set_mac_header(skb, 0); | |
2842 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2843 | skb->pkt_type = PACKET_OTHERHOST; | |
2844 | skb->protocol = htons(ETH_P_802_2); | |
2845 | ||
2846 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2847 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2848 | continue; |
2849 | ||
05c914fe | 2850 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2851 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2852 | continue; | |
2853 | ||
2854 | if (prev_dev) { | |
2855 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2856 | if (skb2) { | |
2857 | skb2->dev = prev_dev; | |
5548a8a1 | 2858 | netif_receive_skb(skb2); |
3d30d949 MW |
2859 | } |
2860 | } | |
2861 | ||
2862 | prev_dev = sdata->dev; | |
2863 | sdata->dev->stats.rx_packets++; | |
2864 | sdata->dev->stats.rx_bytes += skb->len; | |
2865 | } | |
2866 | ||
2867 | if (prev_dev) { | |
2868 | skb->dev = prev_dev; | |
5548a8a1 | 2869 | netif_receive_skb(skb); |
554891e6 JB |
2870 | return; |
2871 | } | |
3d30d949 MW |
2872 | |
2873 | out_free_skb: | |
2874 | dev_kfree_skb(skb); | |
2875 | } | |
2876 | ||
aa0c8636 CL |
2877 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2878 | ieee80211_rx_result res) | |
2879 | { | |
2880 | switch (res) { | |
2881 | case RX_DROP_MONITOR: | |
2882 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2883 | if (rx->sta) | |
2884 | rx->sta->rx_dropped++; | |
2885 | /* fall through */ | |
2886 | case RX_CONTINUE: { | |
2887 | struct ieee80211_rate *rate = NULL; | |
2888 | struct ieee80211_supported_band *sband; | |
2889 | struct ieee80211_rx_status *status; | |
2890 | ||
2891 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2892 | ||
2893 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2894 | if (!(status->flag & RX_FLAG_HT) && |
2895 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2896 | rate = &sband->bitrates[status->rate_idx]; |
2897 | ||
2898 | ieee80211_rx_cooked_monitor(rx, rate); | |
2899 | break; | |
2900 | } | |
2901 | case RX_DROP_UNUSABLE: | |
2902 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2903 | if (rx->sta) | |
2904 | rx->sta->rx_dropped++; | |
2905 | dev_kfree_skb(rx->skb); | |
2906 | break; | |
2907 | case RX_QUEUED: | |
2908 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2909 | break; | |
2910 | } | |
2911 | } | |
571ecf67 | 2912 | |
f9e124fb CL |
2913 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2914 | struct sk_buff_head *frames) | |
58905290 | 2915 | { |
58905290 | 2916 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2917 | struct sk_buff *skb; |
8944b79f | 2918 | |
e32f85f7 LCC |
2919 | #define CALL_RXH(rxh) \ |
2920 | do { \ | |
2921 | res = rxh(rx); \ | |
2922 | if (res != RX_CONTINUE) \ | |
2569a826 | 2923 | goto rxh_next; \ |
e32f85f7 | 2924 | } while (0); |
49461622 | 2925 | |
f9e124fb | 2926 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2927 | |
f9e124fb | 2928 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2929 | /* |
2930 | * all the other fields are valid across frames | |
2931 | * that belong to an aMPDU since they are on the | |
2932 | * same TID from the same station | |
2933 | */ | |
2934 | rx->skb = skb; | |
2935 | ||
2569a826 | 2936 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 2937 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 2938 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 2939 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 2940 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
2941 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2942 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2943 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2944 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2945 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2946 | #endif |
2154c81c | 2947 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2948 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
2949 | |
2950 | /* special treatment -- needs the queue */ | |
2951 | res = ieee80211_rx_h_ctrl(rx, frames); | |
2952 | if (res != RX_CONTINUE) | |
2953 | goto rxh_next; | |
2954 | ||
2e161f78 | 2955 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 2956 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
2957 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
2958 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 2959 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 2960 | |
aa0c8636 CL |
2961 | rxh_next: |
2962 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 2963 | |
49461622 | 2964 | #undef CALL_RXH |
aa0c8636 | 2965 | } |
24a8fdad | 2966 | |
f9e124fb | 2967 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
2968 | } |
2969 | ||
4406c376 | 2970 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 2971 | { |
f9e124fb | 2972 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
2973 | ieee80211_rx_result res = RX_DROP_MONITOR; |
2974 | ||
f9e124fb CL |
2975 | __skb_queue_head_init(&reorder_release); |
2976 | ||
aa0c8636 CL |
2977 | #define CALL_RXH(rxh) \ |
2978 | do { \ | |
2979 | res = rxh(rx); \ | |
2980 | if (res != RX_CONTINUE) \ | |
2981 | goto rxh_next; \ | |
2982 | } while (0); | |
2983 | ||
aa0c8636 CL |
2984 | CALL_RXH(ieee80211_rx_h_check) |
2985 | ||
f9e124fb | 2986 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 2987 | |
f9e124fb | 2988 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 2989 | return; |
49461622 | 2990 | |
2569a826 | 2991 | rxh_next: |
aa0c8636 CL |
2992 | ieee80211_rx_handlers_result(rx, res); |
2993 | ||
2994 | #undef CALL_RXH | |
58905290 JB |
2995 | } |
2996 | ||
2bff8ebf | 2997 | /* |
dd318575 JB |
2998 | * This function makes calls into the RX path, therefore |
2999 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3000 | */ |
3001 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3002 | { | |
f9e124fb | 3003 | struct sk_buff_head frames; |
554891e6 JB |
3004 | struct ieee80211_rx_data rx = { |
3005 | .sta = sta, | |
3006 | .sdata = sta->sdata, | |
3007 | .local = sta->local, | |
9e26297a JB |
3008 | /* This is OK -- must be QoS data frame */ |
3009 | .security_idx = tid, | |
3010 | .seqno_idx = tid, | |
fcf8bd3b | 3011 | .flags = 0, |
554891e6 | 3012 | }; |
2c15a0cf CL |
3013 | struct tid_ampdu_rx *tid_agg_rx; |
3014 | ||
3015 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3016 | if (!tid_agg_rx) | |
3017 | return; | |
2bff8ebf | 3018 | |
f9e124fb CL |
3019 | __skb_queue_head_init(&frames); |
3020 | ||
2c15a0cf | 3021 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3022 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3023 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3024 | |
f9e124fb | 3025 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3026 | } |
3027 | ||
571ecf67 JB |
3028 | /* main receive path */ |
3029 | ||
20b01f80 | 3030 | static int prepare_for_handlers(struct ieee80211_rx_data *rx, |
23a24def JB |
3031 | struct ieee80211_hdr *hdr) |
3032 | { | |
20b01f80 | 3033 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3034 | struct sk_buff *skb = rx->skb; |
3035 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3036 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3037 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3038 | ||
51fb61e7 | 3039 | switch (sdata->vif.type) { |
05c914fe | 3040 | case NL80211_IFTYPE_STATION: |
9bc383de | 3041 | if (!bssid && !sdata->u.mgd.use_4addr) |
23a24def | 3042 | return 0; |
77fdaa12 | 3043 | if (!multicast && |
b203ca39 | 3044 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3045 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3046 | sdata->u.mgd.use_4addr) | |
23a24def | 3047 | return 0; |
554891e6 | 3048 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3049 | } |
3050 | break; | |
05c914fe | 3051 | case NL80211_IFTYPE_ADHOC: |
23a24def JB |
3052 | if (!bssid) |
3053 | return 0; | |
a7767f95 | 3054 | if (ieee80211_is_beacon(hdr->frame_control)) { |
9d9bf77d | 3055 | return 1; |
d48b2968 JB |
3056 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3057 | return 0; | |
23a24def | 3058 | } else if (!multicast && |
b203ca39 | 3059 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3060 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 3061 | return 0; |
554891e6 | 3062 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3063 | } else if (!rx->sta) { |
3064 | int rate_idx; | |
5614618e JB |
3065 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3066 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3067 | else |
eb9fb5b8 | 3068 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3069 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3070 | BIT(rate_idx)); | |
0fb8ca45 | 3071 | } |
23a24def | 3072 | break; |
05c914fe | 3073 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3074 | if (!multicast && |
b203ca39 | 3075 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 JB |
3076 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3077 | return 0; | |
3078 | ||
554891e6 | 3079 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3080 | } |
3081 | break; | |
05c914fe JB |
3082 | case NL80211_IFTYPE_AP_VLAN: |
3083 | case NL80211_IFTYPE_AP: | |
23a24def | 3084 | if (!bssid) { |
b203ca39 | 3085 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
23a24def | 3086 | return 0; |
f142c6b9 | 3087 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3088 | /* |
3089 | * Accept public action frames even when the | |
3090 | * BSSID doesn't match, this is used for P2P | |
3091 | * and location updates. Note that mac80211 | |
3092 | * itself never looks at these frames. | |
3093 | */ | |
2b9ccd4e JB |
3094 | if (!multicast && |
3095 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3096 | return 0; | |
d48b2968 | 3097 | if (ieee80211_is_public_action(hdr, skb->len)) |
3df6eaea | 3098 | return 1; |
d48b2968 | 3099 | if (!ieee80211_is_beacon(hdr->frame_control)) |
23a24def | 3100 | return 0; |
554891e6 | 3101 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 3102 | } |
23a24def | 3103 | break; |
05c914fe | 3104 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3105 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
23a24def | 3106 | return 0; |
b203ca39 | 3107 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
23a24def JB |
3108 | return 0; |
3109 | break; | |
f142c6b9 JB |
3110 | case NL80211_IFTYPE_P2P_DEVICE: |
3111 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3112 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3113 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3114 | !ieee80211_is_beacon(hdr->frame_control)) | |
3115 | return 0; | |
1b737f88 JB |
3116 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3117 | !multicast) | |
f142c6b9 JB |
3118 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3119 | break; | |
2ca27bcf | 3120 | default: |
fb1c1cd6 | 3121 | /* should never get here */ |
f142c6b9 | 3122 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3123 | break; |
23a24def JB |
3124 | } |
3125 | ||
3126 | return 1; | |
3127 | } | |
3128 | ||
4406c376 JB |
3129 | /* |
3130 | * This function returns whether or not the SKB | |
3131 | * was destined for RX processing or not, which, | |
3132 | * if consume is true, is equivalent to whether | |
3133 | * or not the skb was consumed. | |
3134 | */ | |
3135 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3136 | struct sk_buff *skb, bool consume) | |
3137 | { | |
3138 | struct ieee80211_local *local = rx->local; | |
3139 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3140 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3141 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3142 | int prepares; | |
3143 | ||
3144 | rx->skb = skb; | |
554891e6 | 3145 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 JB |
3146 | prepares = prepare_for_handlers(rx, hdr); |
3147 | ||
3148 | if (!prepares) | |
3149 | return false; | |
3150 | ||
4406c376 JB |
3151 | if (!consume) { |
3152 | skb = skb_copy(skb, GFP_ATOMIC); | |
3153 | if (!skb) { | |
3154 | if (net_ratelimit()) | |
3155 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3156 | "failed to copy skb for %s\n", |
4406c376 JB |
3157 | sdata->name); |
3158 | return true; | |
3159 | } | |
3160 | ||
3161 | rx->skb = skb; | |
3162 | } | |
3163 | ||
3164 | ieee80211_invoke_rx_handlers(rx); | |
3165 | return true; | |
3166 | } | |
3167 | ||
571ecf67 | 3168 | /* |
6368e4b1 RR |
3169 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
3170 | * be called with rcu_read_lock protection. | |
571ecf67 | 3171 | */ |
71ebb4aa | 3172 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3173 | struct sk_buff *skb) |
571ecf67 JB |
3174 | { |
3175 | struct ieee80211_local *local = hw_to_local(hw); | |
3176 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3177 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3178 | __le16 fc; |
5cf121c3 | 3179 | struct ieee80211_rx_data rx; |
4406c376 | 3180 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3181 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3182 | int err = 0; |
571ecf67 | 3183 | |
e3cf8b3f | 3184 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3185 | memset(&rx, 0, sizeof(rx)); |
3186 | rx.skb = skb; | |
3187 | rx.local = local; | |
72abd81b | 3188 | |
e3cf8b3f | 3189 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3190 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3191 | |
4a4f1a58 JB |
3192 | if (ieee80211_is_mgmt(fc)) { |
3193 | /* drop frame if too short for header */ | |
3194 | if (skb->len < ieee80211_hdrlen(fc)) | |
3195 | err = -ENOBUFS; | |
3196 | else | |
3197 | err = skb_linearize(skb); | |
3198 | } else { | |
e3cf8b3f | 3199 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3200 | } |
e3cf8b3f ZY |
3201 | |
3202 | if (err) { | |
3203 | dev_kfree_skb(skb); | |
3204 | return; | |
3205 | } | |
3206 | ||
3207 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3208 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3209 | ieee80211_verify_alignment(&rx); |
38f3714d | 3210 | |
d48b2968 JB |
3211 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3212 | ieee80211_is_beacon(hdr->frame_control))) | |
3213 | ieee80211_scan_rx(local, skb); | |
3214 | ||
e3cf8b3f | 3215 | if (ieee80211_is_data(fc)) { |
56af3268 | 3216 | prev_sta = NULL; |
4406c376 | 3217 | |
7852e361 | 3218 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3219 | if (!prev_sta) { |
3220 | prev_sta = sta; | |
3221 | continue; | |
3222 | } | |
3223 | ||
3224 | rx.sta = prev_sta; | |
3225 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3226 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3227 | |
56af3268 | 3228 | prev_sta = sta; |
4406c376 | 3229 | } |
56af3268 BG |
3230 | |
3231 | if (prev_sta) { | |
3232 | rx.sta = prev_sta; | |
3233 | rx.sdata = prev_sta->sdata; | |
3234 | ||
4406c376 | 3235 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3236 | return; |
8e26d5ad | 3237 | goto out; |
56af3268 | 3238 | } |
4406c376 JB |
3239 | } |
3240 | ||
4b0dd98e | 3241 | prev = NULL; |
b2e7771e | 3242 | |
4b0dd98e JB |
3243 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3244 | if (!ieee80211_sdata_running(sdata)) | |
3245 | continue; | |
340e11f3 | 3246 | |
4b0dd98e JB |
3247 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3248 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3249 | continue; | |
340e11f3 | 3250 | |
4b0dd98e JB |
3251 | /* |
3252 | * frame is destined for this interface, but if it's | |
3253 | * not also for the previous one we handle that after | |
3254 | * the loop to avoid copying the SKB once too much | |
3255 | */ | |
4bb29f8c | 3256 | |
4b0dd98e | 3257 | if (!prev) { |
abe60632 | 3258 | prev = sdata; |
4b0dd98e | 3259 | continue; |
340e11f3 | 3260 | } |
4bb29f8c | 3261 | |
7852e361 | 3262 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3263 | rx.sdata = prev; |
3264 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3265 | |
4b0dd98e JB |
3266 | prev = sdata; |
3267 | } | |
3268 | ||
3269 | if (prev) { | |
7852e361 | 3270 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3271 | rx.sdata = prev; |
4406c376 | 3272 | |
4b0dd98e JB |
3273 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3274 | return; | |
571ecf67 | 3275 | } |
4406c376 | 3276 | |
8e26d5ad | 3277 | out: |
4406c376 | 3278 | dev_kfree_skb(skb); |
571ecf67 | 3279 | } |
6368e4b1 RR |
3280 | |
3281 | /* | |
3282 | * This is the receive path handler. It is called by a low level driver when an | |
3283 | * 802.11 MPDU is received from the hardware. | |
3284 | */ | |
103bf9f7 | 3285 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3286 | { |
3287 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3288 | struct ieee80211_rate *rate = NULL; |
3289 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3290 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3291 | |
d20ef63d JB |
3292 | WARN_ON_ONCE(softirq_count() == 0); |
3293 | ||
444e3803 | 3294 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3295 | goto drop; |
8318d78a JB |
3296 | |
3297 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3298 | if (WARN_ON(!sband)) |
3299 | goto drop; | |
8318d78a | 3300 | |
89c3a8ac JB |
3301 | /* |
3302 | * If we're suspending, it is possible although not too likely | |
3303 | * that we'd be receiving frames after having already partially | |
3304 | * quiesced the stack. We can't process such frames then since | |
3305 | * that might, for example, cause stations to be added or other | |
3306 | * driver callbacks be invoked. | |
3307 | */ | |
77a980dc JB |
3308 | if (unlikely(local->quiescing || local->suspended)) |
3309 | goto drop; | |
89c3a8ac | 3310 | |
04800ada AN |
3311 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3312 | if (unlikely(local->in_reconfig)) | |
3313 | goto drop; | |
3314 | ||
ea77f12f JB |
3315 | /* |
3316 | * The same happens when we're not even started, | |
3317 | * but that's worth a warning. | |
3318 | */ | |
77a980dc JB |
3319 | if (WARN_ON(!local->started)) |
3320 | goto drop; | |
ea77f12f | 3321 | |
fc885189 | 3322 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3323 | /* |
fc885189 JB |
3324 | * Validate the rate, unless a PLCP error means that |
3325 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3326 | */ |
fc885189 JB |
3327 | |
3328 | if (status->flag & RX_FLAG_HT) { | |
3329 | /* | |
3330 | * rate_idx is MCS index, which can be [0-76] | |
3331 | * as documented on: | |
3332 | * | |
3333 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3334 | * | |
3335 | * Anything else would be some sort of driver or | |
3336 | * hardware error. The driver should catch hardware | |
3337 | * errors. | |
3338 | */ | |
444e3803 | 3339 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3340 | "Rate marked as an HT rate but passed " |
3341 | "status->rate_idx is not " | |
3342 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3343 | status->rate_idx, | |
3344 | status->rate_idx)) | |
3345 | goto drop; | |
5614618e JB |
3346 | } else if (status->flag & RX_FLAG_VHT) { |
3347 | if (WARN_ONCE(status->rate_idx > 9 || | |
3348 | !status->vht_nss || | |
3349 | status->vht_nss > 8, | |
3350 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3351 | status->rate_idx, status->vht_nss)) | |
3352 | goto drop; | |
fc885189 | 3353 | } else { |
444e3803 | 3354 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3355 | goto drop; |
3356 | rate = &sband->bitrates[status->rate_idx]; | |
3357 | } | |
0fb8ca45 | 3358 | } |
6368e4b1 | 3359 | |
554891e6 JB |
3360 | status->rx_flags = 0; |
3361 | ||
6368e4b1 RR |
3362 | /* |
3363 | * key references and virtual interfaces are protected using RCU | |
3364 | * and this requires that we are in a read-side RCU section during | |
3365 | * receive processing | |
3366 | */ | |
3367 | rcu_read_lock(); | |
3368 | ||
3369 | /* | |
3370 | * Frames with failed FCS/PLCP checksum are not returned, | |
3371 | * all other frames are returned without radiotap header | |
3372 | * if it was previously present. | |
3373 | * Also, frames with less than 16 bytes are dropped. | |
3374 | */ | |
f1d58c25 | 3375 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3376 | if (!skb) { |
3377 | rcu_read_unlock(); | |
3378 | return; | |
3379 | } | |
3380 | ||
e1e54068 JB |
3381 | ieee80211_tpt_led_trig_rx(local, |
3382 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3383 | skb->len); | |
071d9ac2 | 3384 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3385 | |
3386 | rcu_read_unlock(); | |
77a980dc JB |
3387 | |
3388 | return; | |
3389 | drop: | |
3390 | kfree_skb(skb); | |
6368e4b1 | 3391 | } |
103bf9f7 | 3392 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3393 | |
3394 | /* This is a version of the rx handler that can be called from hard irq | |
3395 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3396 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3397 | { |
3398 | struct ieee80211_local *local = hw_to_local(hw); | |
3399 | ||
3400 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3401 | ||
571ecf67 JB |
3402 | skb->pkt_type = IEEE80211_RX_MSG; |
3403 | skb_queue_tail(&local->skb_queue, skb); | |
3404 | tasklet_schedule(&local->tasklet); | |
3405 | } | |
3406 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |