]>
Commit | Line | Data |
---|---|---|
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> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
b7540d8f | 7 | * Copyright(c) 2015 - 2017 Intel Deutschland GmbH |
571ecf67 JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
ab46623e | 14 | #include <linux/jiffies.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
571ecf67 JB |
16 | #include <linux/kernel.h> |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/netdevice.h> | |
19 | #include <linux/etherdevice.h> | |
d4e46a3d | 20 | #include <linux/rcupdate.h> |
bc3b2d7f | 21 | #include <linux/export.h> |
06470f74 | 22 | #include <linux/bitops.h> |
571ecf67 JB |
23 | #include <net/mac80211.h> |
24 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 25 | #include <asm/unaligned.h> |
571ecf67 JB |
26 | |
27 | #include "ieee80211_i.h" | |
24487981 | 28 | #include "driver-ops.h" |
2c8dccc7 | 29 | #include "led.h" |
33b64eb2 | 30 | #include "mesh.h" |
571ecf67 JB |
31 | #include "wep.h" |
32 | #include "wpa.h" | |
33 | #include "tkip.h" | |
34 | #include "wme.h" | |
1d8d3dec | 35 | #include "rate.h" |
571ecf67 | 36 | |
5a490510 JB |
37 | static inline void ieee80211_rx_stats(struct net_device *dev, u32 len) |
38 | { | |
39 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); | |
40 | ||
41 | u64_stats_update_begin(&tstats->syncp); | |
42 | tstats->rx_packets++; | |
43 | tstats->rx_bytes += len; | |
44 | u64_stats_update_end(&tstats->syncp); | |
45 | } | |
46 | ||
a6828493 JB |
47 | static u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
48 | enum nl80211_iftype type) | |
49 | { | |
50 | __le16 fc = hdr->frame_control; | |
51 | ||
52 | if (ieee80211_is_data(fc)) { | |
53 | if (len < 24) /* drop incorrect hdr len (data) */ | |
54 | return NULL; | |
55 | ||
56 | if (ieee80211_has_a4(fc)) | |
57 | return NULL; | |
58 | if (ieee80211_has_tods(fc)) | |
59 | return hdr->addr1; | |
60 | if (ieee80211_has_fromds(fc)) | |
61 | return hdr->addr2; | |
62 | ||
63 | return hdr->addr3; | |
64 | } | |
65 | ||
66 | if (ieee80211_is_mgmt(fc)) { | |
67 | if (len < 24) /* drop incorrect hdr len (mgmt) */ | |
68 | return NULL; | |
69 | return hdr->addr3; | |
70 | } | |
71 | ||
72 | if (ieee80211_is_ctl(fc)) { | |
73 | if (ieee80211_is_pspoll(fc)) | |
74 | return hdr->addr1; | |
75 | ||
76 | if (ieee80211_is_back_req(fc)) { | |
77 | switch (type) { | |
78 | case NL80211_IFTYPE_STATION: | |
79 | return hdr->addr2; | |
80 | case NL80211_IFTYPE_AP: | |
81 | case NL80211_IFTYPE_AP_VLAN: | |
82 | return hdr->addr1; | |
83 | default: | |
84 | break; /* fall through to the return */ | |
85 | } | |
86 | } | |
87 | } | |
88 | ||
89 | return NULL; | |
90 | } | |
91 | ||
b2e7771e JB |
92 | /* |
93 | * monitor mode reception | |
94 | * | |
95 | * This function cleans up the SKB, i.e. it removes all the stuff | |
96 | * only useful for monitoring. | |
97 | */ | |
98 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
1f7bba79 JB |
99 | struct sk_buff *skb, |
100 | unsigned int rtap_vendor_space) | |
b2e7771e | 101 | { |
30686bf7 | 102 | if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) { |
b2e7771e | 103 | if (likely(skb->len > FCS_LEN)) |
e3cf8b3f | 104 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
105 | else { |
106 | /* driver bug */ | |
107 | WARN_ON(1); | |
108 | dev_kfree_skb(skb); | |
0624760c | 109 | return NULL; |
b2e7771e JB |
110 | } |
111 | } | |
112 | ||
1f7bba79 JB |
113 | __pskb_pull(skb, rtap_vendor_space); |
114 | ||
b2e7771e JB |
115 | return skb; |
116 | } | |
117 | ||
1f7bba79 JB |
118 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, |
119 | unsigned int rtap_vendor_space) | |
b2e7771e | 120 | { |
f1d58c25 | 121 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1f7bba79 JB |
122 | struct ieee80211_hdr *hdr; |
123 | ||
124 | hdr = (void *)(skb->data + rtap_vendor_space); | |
b2e7771e | 125 | |
4c298677 | 126 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
17883048 GB |
127 | RX_FLAG_FAILED_PLCP_CRC | |
128 | RX_FLAG_ONLY_MONITOR)) | |
6b59db7d ZG |
129 | return true; |
130 | ||
1f7bba79 | 131 | if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) |
6b59db7d ZG |
132 | return true; |
133 | ||
87228f57 HH |
134 | if (ieee80211_is_ctl(hdr->frame_control) && |
135 | !ieee80211_is_pspoll(hdr->frame_control) && | |
136 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
137 | return true; |
138 | ||
139 | return false; | |
b2e7771e JB |
140 | } |
141 | ||
601ae7f2 | 142 | static int |
1f7bba79 JB |
143 | ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, |
144 | struct ieee80211_rx_status *status, | |
145 | struct sk_buff *skb) | |
601ae7f2 BR |
146 | { |
147 | int len; | |
148 | ||
149 | /* always present fields */ | |
a144f378 | 150 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 151 | |
a144f378 | 152 | /* allocate extra bitmaps */ |
a144f378 JB |
153 | if (status->chains) |
154 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
155 | |
156 | if (ieee80211_have_rx_timestamp(status)) { | |
157 | len = ALIGN(len, 8); | |
601ae7f2 | 158 | len += 8; |
90b9e446 | 159 | } |
30686bf7 | 160 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) |
601ae7f2 | 161 | len += 1; |
601ae7f2 | 162 | |
a144f378 JB |
163 | /* antenna field, if we don't have per-chain info */ |
164 | if (!status->chains) | |
165 | len += 1; | |
166 | ||
90b9e446 JB |
167 | /* padding for RX_FLAGS if necessary */ |
168 | len = ALIGN(len, 2); | |
601ae7f2 | 169 | |
6d744bac JB |
170 | if (status->flag & RX_FLAG_HT) /* HT info */ |
171 | len += 3; | |
172 | ||
4c298677 | 173 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 174 | len = ALIGN(len, 4); |
4c298677 JB |
175 | len += 8; |
176 | } | |
177 | ||
51648921 JB |
178 | if (status->flag & RX_FLAG_VHT) { |
179 | len = ALIGN(len, 2); | |
180 | len += 12; | |
181 | } | |
182 | ||
99ee7cae JB |
183 | if (local->hw.radiotap_timestamp.units_pos >= 0) { |
184 | len = ALIGN(len, 8); | |
185 | len += 12; | |
186 | } | |
187 | ||
a144f378 JB |
188 | if (status->chains) { |
189 | /* antenna and antenna signal fields */ | |
190 | len += 2 * hweight8(status->chains); | |
191 | } | |
192 | ||
1f7bba79 JB |
193 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
194 | struct ieee80211_vendor_radiotap *rtap = (void *)skb->data; | |
195 | ||
196 | /* vendor presence bitmap */ | |
197 | len += 4; | |
198 | /* alignment for fixed 6-byte vendor data header */ | |
199 | len = ALIGN(len, 2); | |
200 | /* vendor data header */ | |
201 | len += 6; | |
202 | if (WARN_ON(rtap->align == 0)) | |
203 | rtap->align = 1; | |
204 | len = ALIGN(len, rtap->align); | |
205 | len += rtap->len + rtap->pad; | |
206 | } | |
207 | ||
601ae7f2 BR |
208 | return len; |
209 | } | |
210 | ||
00ea6deb | 211 | /* |
601ae7f2 BR |
212 | * ieee80211_add_rx_radiotap_header - add radiotap header |
213 | * | |
214 | * add a radiotap header containing all the fields which the hardware provided. | |
215 | */ | |
216 | static void | |
217 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
218 | struct sk_buff *skb, | |
601ae7f2 | 219 | struct ieee80211_rate *rate, |
973ef21a | 220 | int rtap_len, bool has_fcs) |
601ae7f2 | 221 | { |
f1d58c25 | 222 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
223 | struct ieee80211_radiotap_header *rthdr; |
224 | unsigned char *pos; | |
a144f378 JB |
225 | __le32 *it_present; |
226 | u32 it_present_val; | |
6a86b9c7 | 227 | u16 rx_flags = 0; |
a5e70697 | 228 | u16 channel_flags = 0; |
a144f378 JB |
229 | int mpdulen, chain; |
230 | unsigned long chains = status->chains; | |
1f7bba79 JB |
231 | struct ieee80211_vendor_radiotap rtap = {}; |
232 | ||
233 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
234 | rtap = *(struct ieee80211_vendor_radiotap *)skb->data; | |
235 | /* rtap.len and rtap.pad are undone immediately */ | |
236 | skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad); | |
237 | } | |
f4bda337 TP |
238 | |
239 | mpdulen = skb->len; | |
30686bf7 | 240 | if (!(has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS))) |
f4bda337 | 241 | mpdulen += FCS_LEN; |
601ae7f2 BR |
242 | |
243 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
1f7bba79 | 244 | memset(rthdr, 0, rtap_len - rtap.len - rtap.pad); |
a144f378 | 245 | it_present = &rthdr->it_present; |
601ae7f2 BR |
246 | |
247 | /* radiotap header, set always present flags */ | |
0059b2b1 | 248 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
249 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
250 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
251 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
252 | ||
253 | if (!status->chains) | |
254 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
255 | ||
256 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
257 | it_present_val |= | |
258 | BIT(IEEE80211_RADIOTAP_EXT) | | |
259 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
260 | put_unaligned_le32(it_present_val, it_present); | |
261 | it_present++; | |
262 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
263 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
264 | } | |
601ae7f2 | 265 | |
1f7bba79 JB |
266 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
267 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | | |
268 | BIT(IEEE80211_RADIOTAP_EXT); | |
269 | put_unaligned_le32(it_present_val, it_present); | |
270 | it_present++; | |
271 | it_present_val = rtap.present; | |
272 | } | |
273 | ||
a144f378 JB |
274 | put_unaligned_le32(it_present_val, it_present); |
275 | ||
276 | pos = (void *)(it_present + 1); | |
277 | ||
601ae7f2 BR |
278 | /* the order of the following fields is important */ |
279 | ||
280 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 281 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
282 | /* padding */ |
283 | while ((pos - (u8 *)rthdr) & 7) | |
284 | *pos++ = 0; | |
f4bda337 TP |
285 | put_unaligned_le64( |
286 | ieee80211_calculate_rx_timestamp(local, status, | |
287 | mpdulen, 0), | |
288 | pos); | |
1df332e8 | 289 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
290 | pos += 8; |
291 | } | |
292 | ||
293 | /* IEEE80211_RADIOTAP_FLAGS */ | |
30686bf7 | 294 | if (has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
601ae7f2 | 295 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
296 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
297 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
298 | if (status->flag & RX_FLAG_SHORTPRE) |
299 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
300 | pos++; |
301 | ||
302 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 303 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 304 | /* |
f8d1ccf1 | 305 | * Without rate information don't add it. If we have, |
38f37be2 | 306 | * MCS information is a separate field in radiotap, |
73b48099 JB |
307 | * added below. The byte here is needed as padding |
308 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
309 | */ |
310 | *pos = 0; | |
8d6f658e | 311 | } else { |
2103dec1 | 312 | int shift = 0; |
ebe6c7ba | 313 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
314 | if (status->flag & RX_FLAG_10MHZ) |
315 | shift = 1; | |
316 | else if (status->flag & RX_FLAG_5MHZ) | |
317 | shift = 2; | |
318 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 319 | } |
601ae7f2 BR |
320 | pos++; |
321 | ||
322 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 323 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 324 | pos += 2; |
a5e70697 SW |
325 | if (status->flag & RX_FLAG_10MHZ) |
326 | channel_flags |= IEEE80211_CHAN_HALF; | |
327 | else if (status->flag & RX_FLAG_5MHZ) | |
328 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
329 | ||
57fbcce3 | 330 | if (status->band == NL80211_BAND_5GHZ) |
a5e70697 | 331 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 332 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 333 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 334 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 335 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 336 | else if (rate) |
3a5c5e81 | 337 | channel_flags |= IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 338 | else |
a5e70697 SW |
339 | channel_flags |= IEEE80211_CHAN_2GHZ; |
340 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
341 | pos += 2; |
342 | ||
343 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
30686bf7 | 344 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM) && |
fe8431f8 | 345 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
601ae7f2 BR |
346 | *pos = status->signal; |
347 | rthdr->it_present |= | |
348 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
349 | pos++; | |
350 | } | |
351 | ||
601ae7f2 BR |
352 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
353 | ||
a144f378 JB |
354 | if (!status->chains) { |
355 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
356 | *pos = status->antenna; | |
357 | pos++; | |
358 | } | |
601ae7f2 | 359 | |
601ae7f2 BR |
360 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
361 | ||
362 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
363 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 364 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 365 | *pos++ = 0; |
aae89831 | 366 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
367 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
368 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 369 | pos += 2; |
6d744bac JB |
370 | |
371 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
372 | unsigned int stbc; |
373 | ||
6d744bac | 374 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 375 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
376 | *pos = 0; |
377 | if (status->flag & RX_FLAG_SHORT_GI) | |
378 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
379 | if (status->flag & RX_FLAG_40MHZ) | |
380 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
381 | if (status->flag & RX_FLAG_HT_GF) |
382 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
383 | if (status->flag & RX_FLAG_LDPC) |
384 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
385 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
386 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
387 | pos++; |
388 | *pos++ = status->rate_idx; | |
389 | } | |
4c298677 JB |
390 | |
391 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
392 | u16 flags = 0; | |
393 | ||
394 | /* ensure 4 byte alignment */ | |
395 | while ((pos - (u8 *)rthdr) & 3) | |
396 | pos++; | |
397 | rthdr->it_present |= | |
398 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
399 | put_unaligned_le32(status->ampdu_reference, pos); | |
400 | pos += 4; | |
4c298677 JB |
401 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) |
402 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
403 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
404 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
405 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
406 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
407 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
408 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
409 | put_unaligned_le16(flags, pos); | |
410 | pos += 2; | |
411 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
412 | *pos++ = status->ampdu_delimiter_crc; | |
413 | else | |
414 | *pos++ = 0; | |
415 | *pos++ = 0; | |
416 | } | |
90b9e446 | 417 | |
51648921 JB |
418 | if (status->flag & RX_FLAG_VHT) { |
419 | u16 known = local->hw.radiotap_vht_details; | |
420 | ||
421 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
51648921 JB |
422 | put_unaligned_le16(known, pos); |
423 | pos += 2; | |
424 | /* flags */ | |
425 | if (status->flag & RX_FLAG_SHORT_GI) | |
426 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
427 | /* in VHT, STBC is binary */ |
428 | if (status->flag & RX_FLAG_STBC_MASK) | |
429 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
430 | if (status->vht_flag & RX_VHT_FLAG_BF) |
431 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
432 | pos++; |
433 | /* bandwidth */ | |
1b8d242a | 434 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 435 | *pos++ = 4; |
1b8d242a | 436 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
437 | *pos++ = 11; |
438 | else if (status->flag & RX_FLAG_40MHZ) | |
439 | *pos++ = 1; | |
440 | else /* 20 MHz */ | |
441 | *pos++ = 0; | |
442 | /* MCS/NSS */ | |
443 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
444 | pos += 4; | |
445 | /* coding field */ | |
63c361f5 EG |
446 | if (status->flag & RX_FLAG_LDPC) |
447 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
448 | pos++; |
449 | /* group ID */ | |
450 | pos++; | |
451 | /* partial_aid */ | |
452 | pos += 2; | |
453 | } | |
454 | ||
99ee7cae JB |
455 | if (local->hw.radiotap_timestamp.units_pos >= 0) { |
456 | u16 accuracy = 0; | |
457 | u8 flags = IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT; | |
458 | ||
459 | rthdr->it_present |= | |
460 | cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP); | |
461 | ||
462 | /* ensure 8 byte alignment */ | |
463 | while ((pos - (u8 *)rthdr) & 7) | |
464 | pos++; | |
465 | ||
466 | put_unaligned_le64(status->device_timestamp, pos); | |
467 | pos += sizeof(u64); | |
468 | ||
469 | if (local->hw.radiotap_timestamp.accuracy >= 0) { | |
470 | accuracy = local->hw.radiotap_timestamp.accuracy; | |
471 | flags |= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY; | |
472 | } | |
473 | put_unaligned_le16(accuracy, pos); | |
474 | pos += sizeof(u16); | |
475 | ||
476 | *pos++ = local->hw.radiotap_timestamp.units_pos; | |
477 | *pos++ = flags; | |
478 | } | |
479 | ||
a144f378 JB |
480 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
481 | *pos++ = status->chain_signal[chain]; | |
482 | *pos++ = chain; | |
483 | } | |
1f7bba79 JB |
484 | |
485 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
486 | /* ensure 2 byte alignment for the vendor field as required */ | |
487 | if ((pos - (u8 *)rthdr) & 1) | |
488 | *pos++ = 0; | |
489 | *pos++ = rtap.oui[0]; | |
490 | *pos++ = rtap.oui[1]; | |
491 | *pos++ = rtap.oui[2]; | |
492 | *pos++ = rtap.subns; | |
493 | put_unaligned_le16(rtap.len, pos); | |
494 | pos += 2; | |
495 | /* align the actual payload as requested */ | |
496 | while ((pos - (u8 *)rthdr) & (rtap.align - 1)) | |
497 | *pos++ = 0; | |
498 | /* data (and possible padding) already follows */ | |
499 | } | |
601ae7f2 BR |
500 | } |
501 | ||
b2e7771e JB |
502 | /* |
503 | * This function copies a received frame to all monitor interfaces and | |
504 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
505 | * radiotap header the driver might have added. | |
506 | */ | |
507 | static struct sk_buff * | |
508 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 509 | struct ieee80211_rate *rate) |
b2e7771e | 510 | { |
f1d58c25 | 511 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 512 | struct ieee80211_sub_if_data *sdata; |
1f7bba79 | 513 | int rt_hdrlen, needed_headroom; |
b2e7771e JB |
514 | struct sk_buff *skb, *skb2; |
515 | struct net_device *prev_dev = NULL; | |
516 | int present_fcs_len = 0; | |
1f7bba79 | 517 | unsigned int rtap_vendor_space = 0; |
42bd20d9 AE |
518 | struct ieee80211_mgmt *mgmt; |
519 | struct ieee80211_sub_if_data *monitor_sdata = | |
520 | rcu_dereference(local->monitor_sdata); | |
1f7bba79 JB |
521 | |
522 | if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) { | |
523 | struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data; | |
524 | ||
525 | rtap_vendor_space = sizeof(*rtap) + rtap->len + rtap->pad; | |
526 | } | |
b2e7771e JB |
527 | |
528 | /* | |
529 | * First, we may need to make a copy of the skb because | |
530 | * (1) we need to modify it for radiotap (if not present), and | |
531 | * (2) the other RX handlers will modify the skb we got. | |
532 | * | |
533 | * We don't need to, of course, if we aren't going to return | |
534 | * the SKB because it has a bad FCS/PLCP checksum. | |
535 | */ | |
0869aea0 | 536 | |
30686bf7 | 537 | if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
b2e7771e JB |
538 | present_fcs_len = FCS_LEN; |
539 | ||
1f7bba79 JB |
540 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
541 | if (!pskb_may_pull(origskb, 2 + rtap_vendor_space)) { | |
e3cf8b3f ZY |
542 | dev_kfree_skb(origskb); |
543 | return NULL; | |
544 | } | |
545 | ||
17883048 | 546 | if (!local->monitors || (status->flag & RX_FLAG_SKIP_MONITOR)) { |
1f7bba79 JB |
547 | if (should_drop_frame(origskb, present_fcs_len, |
548 | rtap_vendor_space)) { | |
b2e7771e JB |
549 | dev_kfree_skb(origskb); |
550 | return NULL; | |
551 | } | |
552 | ||
1f7bba79 | 553 | return remove_monitor_info(local, origskb, rtap_vendor_space); |
b2e7771e JB |
554 | } |
555 | ||
751413ea | 556 | /* room for the radiotap header based on driver features */ |
1f7bba79 JB |
557 | rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, origskb); |
558 | needed_headroom = rt_hdrlen - rtap_vendor_space; | |
751413ea | 559 | |
1f7bba79 | 560 | if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { |
b2e7771e JB |
561 | /* only need to expand headroom if necessary */ |
562 | skb = origskb; | |
563 | origskb = NULL; | |
564 | ||
565 | /* | |
566 | * This shouldn't trigger often because most devices have an | |
567 | * RX header they pull before we get here, and that should | |
568 | * be big enough for our radiotap information. We should | |
569 | * probably export the length to drivers so that we can have | |
570 | * them allocate enough headroom to start with. | |
571 | */ | |
572 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 573 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
574 | dev_kfree_skb(skb); |
575 | return NULL; | |
576 | } | |
577 | } else { | |
578 | /* | |
579 | * Need to make a copy and possibly remove radiotap header | |
580 | * and FCS from the original. | |
581 | */ | |
582 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
583 | ||
1f7bba79 JB |
584 | origskb = remove_monitor_info(local, origskb, |
585 | rtap_vendor_space); | |
b2e7771e JB |
586 | |
587 | if (!skb) | |
588 | return origskb; | |
589 | } | |
590 | ||
0869aea0 | 591 | /* prepend radiotap information */ |
1f7bba79 | 592 | ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true); |
b2e7771e | 593 | |
ce3edf6d | 594 | skb_reset_mac_header(skb); |
b2e7771e JB |
595 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
596 | skb->pkt_type = PACKET_OTHERHOST; | |
597 | skb->protocol = htons(ETH_P_802_2); | |
598 | ||
599 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 600 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
601 | continue; |
602 | ||
d8212184 | 603 | if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) |
3d30d949 MW |
604 | continue; |
605 | ||
9607e6b6 | 606 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
607 | continue; |
608 | ||
b2e7771e JB |
609 | if (prev_dev) { |
610 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
611 | if (skb2) { | |
612 | skb2->dev = prev_dev; | |
5548a8a1 | 613 | netif_receive_skb(skb2); |
b2e7771e JB |
614 | } |
615 | } | |
616 | ||
617 | prev_dev = sdata->dev; | |
5a490510 | 618 | ieee80211_rx_stats(sdata->dev, skb->len); |
b2e7771e JB |
619 | } |
620 | ||
42bd20d9 AE |
621 | mgmt = (void *)skb->data; |
622 | if (monitor_sdata && | |
623 | skb->len >= IEEE80211_MIN_ACTION_SIZE + 1 + VHT_MUMIMO_GROUPS_DATA_LEN && | |
624 | ieee80211_is_action(mgmt->frame_control) && | |
625 | mgmt->u.action.category == WLAN_CATEGORY_VHT && | |
626 | mgmt->u.action.u.vht_group_notif.action_code == WLAN_VHT_ACTION_GROUPID_MGMT && | |
627 | is_valid_ether_addr(monitor_sdata->u.mntr.mu_follow_addr) && | |
628 | ether_addr_equal(mgmt->da, monitor_sdata->u.mntr.mu_follow_addr)) { | |
629 | struct sk_buff *mu_skb = skb_copy(skb, GFP_ATOMIC); | |
630 | ||
631 | if (mu_skb) { | |
632 | mu_skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
633 | skb_queue_tail(&monitor_sdata->skb_queue, mu_skb); | |
634 | ieee80211_queue_work(&local->hw, &monitor_sdata->work); | |
635 | } | |
636 | } | |
637 | ||
b2e7771e JB |
638 | if (prev_dev) { |
639 | skb->dev = prev_dev; | |
5548a8a1 | 640 | netif_receive_skb(skb); |
b2e7771e JB |
641 | } else |
642 | dev_kfree_skb(skb); | |
643 | ||
644 | return origskb; | |
645 | } | |
646 | ||
5cf121c3 | 647 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 648 | { |
238f74a2 | 649 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 650 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 651 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
652 | |
653 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
654 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
655 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 656 | /* frame has qos control */ |
238f74a2 | 657 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 658 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 659 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
660 | |
661 | seqno_idx = tid; | |
662 | security_idx = tid; | |
6e0d114d | 663 | } else { |
1411f9b5 JB |
664 | /* |
665 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
666 | * | |
667 | * Sequence numbers for management frames, QoS data | |
668 | * frames with a broadcast/multicast address in the | |
669 | * Address 1 field, and all non-QoS data frames sent | |
670 | * by QoS STAs are assigned using an additional single | |
671 | * modulo-4096 counter, [...] | |
672 | * | |
673 | * We also use that counter for non-QoS STAs. | |
674 | */ | |
5a306f58 | 675 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
676 | security_idx = 0; |
677 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 678 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 679 | tid = 0; |
6e0d114d | 680 | } |
52865dfd | 681 | |
9e26297a JB |
682 | rx->seqno_idx = seqno_idx; |
683 | rx->security_idx = security_idx; | |
6e0d114d JB |
684 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
685 | * For now, set skb->priority to 0 for other cases. */ | |
686 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 687 | } |
6e0d114d | 688 | |
d1c3a37c JB |
689 | /** |
690 | * DOC: Packet alignment | |
691 | * | |
692 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
693 | * to the stack. | |
694 | * | |
695 | * Additionally, should, if possible, align the payload data in a way that | |
696 | * guarantees that the contained IP header is aligned to a four-byte | |
697 | * boundary. In the case of regular frames, this simply means aligning the | |
698 | * payload to a four-byte boundary (because either the IP header is directly | |
699 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
700 | * in front of it). If the payload data is not properly aligned and the |
701 | * architecture doesn't support efficient unaligned operations, mac80211 | |
702 | * will align the data. | |
d1c3a37c JB |
703 | * |
704 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
705 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
706 | * push the IP header further back to a multiple of four again. Thankfully, the | |
707 | * specs were sane enough this time around to require padding each A-MSDU | |
708 | * subframe to a length that is a multiple of four. | |
709 | * | |
25985edc | 710 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
711 | * the payload is not supported, the driver is required to move the 802.11 |
712 | * header to be directly in front of the payload in that case. | |
713 | */ | |
714 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 715 | { |
59d9cb07 | 716 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
441275e1 | 717 | WARN_ON_ONCE((unsigned long)rx->skb->data & 1); |
d1c3a37c | 718 | #endif |
6e0d114d JB |
719 | } |
720 | ||
6368e4b1 | 721 | |
571ecf67 JB |
722 | /* rx handlers */ |
723 | ||
3cfcf6ac JM |
724 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
725 | { | |
726 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
727 | ||
d8ca16db | 728 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
729 | return 0; |
730 | ||
d8ca16db | 731 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
732 | } |
733 | ||
734 | ||
735 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
736 | { | |
737 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
738 | ||
d8ca16db | 739 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
740 | return 0; |
741 | ||
d8ca16db | 742 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
743 | } |
744 | ||
745 | ||
746 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
747 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
748 | { | |
749 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
750 | struct ieee80211_mmie *mmie; | |
56c52da2 | 751 | struct ieee80211_mmie_16 *mmie16; |
3cfcf6ac | 752 | |
1df332e8 | 753 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
754 | return -1; |
755 | ||
d8ca16db | 756 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
757 | return -1; /* not a robust management frame */ |
758 | ||
759 | mmie = (struct ieee80211_mmie *) | |
760 | (skb->data + skb->len - sizeof(*mmie)); | |
56c52da2 JM |
761 | if (mmie->element_id == WLAN_EID_MMIE && |
762 | mmie->length == sizeof(*mmie) - 2) | |
763 | return le16_to_cpu(mmie->key_id); | |
764 | ||
765 | mmie16 = (struct ieee80211_mmie_16 *) | |
766 | (skb->data + skb->len - sizeof(*mmie16)); | |
767 | if (skb->len >= 24 + sizeof(*mmie16) && | |
768 | mmie16->element_id == WLAN_EID_MMIE && | |
769 | mmie16->length == sizeof(*mmie16) - 2) | |
770 | return le16_to_cpu(mmie16->key_id); | |
771 | ||
772 | return -1; | |
3cfcf6ac JM |
773 | } |
774 | ||
2c61cf9c JB |
775 | static int ieee80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
776 | struct sk_buff *skb) | |
2475b1cc MS |
777 | { |
778 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
779 | __le16 fc; | |
780 | int hdrlen; | |
781 | u8 keyid; | |
782 | ||
783 | fc = hdr->frame_control; | |
784 | hdrlen = ieee80211_hdrlen(fc); | |
785 | ||
786 | if (skb->len < hdrlen + cs->hdr_len) | |
787 | return -EINVAL; | |
788 | ||
789 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
790 | keyid &= cs->key_idx_mask; | |
791 | keyid >>= cs->key_idx_shift; | |
792 | ||
793 | return keyid; | |
794 | } | |
795 | ||
1df332e8 | 796 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 797 | { |
a7767f95 | 798 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 799 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 800 | |
a7767f95 | 801 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
802 | if (is_multicast_ether_addr(hdr->addr1)) { |
803 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 804 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 805 | return RX_DROP_MONITOR; |
b203ca39 | 806 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
807 | return RX_DROP_MONITOR; |
808 | } else { | |
809 | if (!ieee80211_has_a4(hdr->frame_control)) | |
810 | return RX_DROP_MONITOR; | |
b203ca39 | 811 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
812 | return RX_DROP_MONITOR; |
813 | } | |
33b64eb2 LCC |
814 | } |
815 | ||
816 | /* If there is not an established peer link and this is not a peer link | |
817 | * establisment frame, beacon or probe, drop the frame. | |
818 | */ | |
819 | ||
57cf8043 | 820 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 821 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 822 | |
a7767f95 | 823 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
824 | return RX_DROP_MONITOR; |
825 | ||
a7767f95 | 826 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 827 | u8 category; |
9b395bc3 JB |
828 | |
829 | /* make sure category field is present */ | |
830 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
831 | return RX_DROP_MONITOR; | |
832 | ||
33b64eb2 | 833 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
834 | category = mgmt->u.action.category; |
835 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 836 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 837 | return RX_DROP_MONITOR; |
33b64eb2 | 838 | return RX_CONTINUE; |
33b64eb2 LCC |
839 | } |
840 | ||
a7767f95 HH |
841 | if (ieee80211_is_probe_req(hdr->frame_control) || |
842 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
843 | ieee80211_is_beacon(hdr->frame_control) || |
844 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
845 | return RX_CONTINUE; |
846 | ||
847 | return RX_DROP_MONITOR; | |
a7767f95 HH |
848 | } |
849 | ||
902acc78 JB |
850 | return RX_CONTINUE; |
851 | } | |
33b64eb2 | 852 | |
fb4ea054 JB |
853 | static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx *tid_agg_rx, |
854 | int index) | |
855 | { | |
856 | struct sk_buff_head *frames = &tid_agg_rx->reorder_buf[index]; | |
857 | struct sk_buff *tail = skb_peek_tail(frames); | |
858 | struct ieee80211_rx_status *status; | |
859 | ||
06470f74 SS |
860 | if (tid_agg_rx->reorder_buf_filtered & BIT_ULL(index)) |
861 | return true; | |
862 | ||
fb4ea054 JB |
863 | if (!tail) |
864 | return false; | |
865 | ||
866 | status = IEEE80211_SKB_RXCB(tail); | |
867 | if (status->flag & RX_FLAG_AMSDU_MORE) | |
868 | return false; | |
869 | ||
870 | return true; | |
871 | } | |
872 | ||
d3b2fb53 | 873 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 874 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
875 | int index, |
876 | struct sk_buff_head *frames) | |
1edfb1af | 877 | { |
83eb935e MK |
878 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
879 | struct sk_buff *skb; | |
4cfda47b | 880 | struct ieee80211_rx_status *status; |
1edfb1af | 881 | |
dd318575 JB |
882 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
883 | ||
83eb935e | 884 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
885 | goto no_frame; |
886 | ||
fb4ea054 | 887 | if (!ieee80211_rx_reorder_ready(tid_agg_rx, index)) { |
83eb935e MK |
888 | __skb_queue_purge(skb_list); |
889 | goto no_frame; | |
890 | } | |
891 | ||
892 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 893 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
894 | while ((skb = __skb_dequeue(skb_list))) { |
895 | status = IEEE80211_SKB_RXCB(skb); | |
896 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
897 | __skb_queue_tail(frames, skb); | |
898 | } | |
1edfb1af JB |
899 | |
900 | no_frame: | |
06470f74 | 901 | tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index); |
9a886586 | 902 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
903 | } |
904 | ||
d3b2fb53 | 905 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 906 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
907 | u16 head_seq_num, |
908 | struct sk_buff_head *frames) | |
1edfb1af JB |
909 | { |
910 | int index; | |
911 | ||
dd318575 JB |
912 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
913 | ||
9a886586 | 914 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 915 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
916 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
917 | frames); | |
1edfb1af JB |
918 | } |
919 | } | |
920 | ||
921 | /* | |
922 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
923 | * the skb was added to the buffer longer than this time ago, the earlier | |
924 | * frames that have not yet been received are assumed to be lost and the skb | |
925 | * can be released for processing. This may also release other skb's from the | |
926 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
927 | * |
928 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
929 | */ |
930 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
931 | ||
d3b2fb53 | 932 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
933 | struct tid_ampdu_rx *tid_agg_rx, |
934 | struct sk_buff_head *frames) | |
aa0c8636 | 935 | { |
83eb935e | 936 | int index, i, j; |
aa0c8636 | 937 | |
dd318575 JB |
938 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
939 | ||
aa0c8636 | 940 | /* release the buffer until next missing frame */ |
2e3049b7 | 941 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
fb4ea054 | 942 | if (!ieee80211_rx_reorder_ready(tid_agg_rx, index) && |
07ae2dfc | 943 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
944 | /* |
945 | * No buffers ready to be released, but check whether any | |
946 | * frames in the reorder buffer have timed out. | |
947 | */ | |
aa0c8636 CL |
948 | int skipped = 1; |
949 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
950 | j = (j + 1) % tid_agg_rx->buf_size) { | |
fb4ea054 | 951 | if (!ieee80211_rx_reorder_ready(tid_agg_rx, j)) { |
aa0c8636 CL |
952 | skipped++; |
953 | continue; | |
954 | } | |
499fe9a4 DH |
955 | if (skipped && |
956 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 957 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 958 | goto set_release_timer; |
aa0c8636 | 959 | |
83eb935e MK |
960 | /* don't leave incomplete A-MSDUs around */ |
961 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
962 | i = (i + 1) % tid_agg_rx->buf_size) | |
963 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
964 | ||
bdcbd8e0 JB |
965 | ht_dbg_ratelimited(sdata, |
966 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
967 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
968 | frames); | |
aa0c8636 CL |
969 | |
970 | /* | |
971 | * Increment the head seq# also for the skipped slots. | |
972 | */ | |
973 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
974 | (tid_agg_rx->head_seq_num + |
975 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
976 | skipped = 0; |
977 | } | |
fb4ea054 | 978 | } else while (ieee80211_rx_reorder_ready(tid_agg_rx, index)) { |
f9e124fb CL |
979 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
980 | frames); | |
2e3049b7 | 981 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 982 | } |
2bff8ebf CL |
983 | |
984 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 985 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
986 | |
987 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
988 | j = (j + 1) % tid_agg_rx->buf_size) { | |
fb4ea054 | 989 | if (ieee80211_rx_reorder_ready(tid_agg_rx, j)) |
2bff8ebf CL |
990 | break; |
991 | } | |
992 | ||
993 | set_release_timer: | |
994 | ||
788211d8 JB |
995 | if (!tid_agg_rx->removed) |
996 | mod_timer(&tid_agg_rx->reorder_timer, | |
997 | tid_agg_rx->reorder_time[j] + 1 + | |
998 | HT_RX_REORDER_BUF_TIMEOUT); | |
2bff8ebf CL |
999 | } else { |
1000 | del_timer(&tid_agg_rx->reorder_timer); | |
1001 | } | |
aa0c8636 CL |
1002 | } |
1003 | ||
1edfb1af JB |
1004 | /* |
1005 | * As this function belongs to the RX path it must be under | |
1006 | * rcu_read_lock protection. It returns false if the frame | |
1007 | * can be processed immediately, true if it was consumed. | |
1008 | */ | |
d3b2fb53 | 1009 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 1010 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
1011 | struct sk_buff *skb, |
1012 | struct sk_buff_head *frames) | |
1edfb1af JB |
1013 | { |
1014 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 1015 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
1016 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
1017 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
1018 | u16 head_seq_num, buf_size; | |
1019 | int index; | |
2bff8ebf | 1020 | bool ret = true; |
1edfb1af | 1021 | |
dd318575 JB |
1022 | spin_lock(&tid_agg_rx->reorder_lock); |
1023 | ||
4549cf2b MK |
1024 | /* |
1025 | * Offloaded BA sessions have no known starting sequence number so pick | |
1026 | * one from first Rxed frame for this tid after BA was started. | |
1027 | */ | |
1028 | if (unlikely(tid_agg_rx->auto_seq)) { | |
1029 | tid_agg_rx->auto_seq = false; | |
1030 | tid_agg_rx->ssn = mpdu_seq_num; | |
1031 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
1032 | } | |
1033 | ||
1edfb1af JB |
1034 | buf_size = tid_agg_rx->buf_size; |
1035 | head_seq_num = tid_agg_rx->head_seq_num; | |
1036 | ||
b7540d8f SS |
1037 | /* |
1038 | * If the current MPDU's SN is smaller than the SSN, it shouldn't | |
1039 | * be reordered. | |
1040 | */ | |
1041 | if (unlikely(!tid_agg_rx->started)) { | |
1042 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { | |
1043 | ret = false; | |
1044 | goto out; | |
1045 | } | |
1046 | tid_agg_rx->started = true; | |
1047 | } | |
1048 | ||
1edfb1af | 1049 | /* frame with out of date sequence number */ |
9a886586 | 1050 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 1051 | dev_kfree_skb(skb); |
2bff8ebf | 1052 | goto out; |
1edfb1af JB |
1053 | } |
1054 | ||
1055 | /* | |
1056 | * If frame the sequence number exceeds our buffering window | |
1057 | * size release some previous frames to make room for this one. | |
1058 | */ | |
9a886586 JB |
1059 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
1060 | head_seq_num = ieee80211_sn_inc( | |
1061 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 1062 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 1063 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 1064 | head_seq_num, frames); |
1edfb1af JB |
1065 | } |
1066 | ||
1067 | /* Now the new frame is always in the range of the reordering buffer */ | |
1068 | ||
2e3049b7 | 1069 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
1070 | |
1071 | /* check if we already stored this frame */ | |
fb4ea054 | 1072 | if (ieee80211_rx_reorder_ready(tid_agg_rx, index)) { |
1edfb1af | 1073 | dev_kfree_skb(skb); |
2bff8ebf | 1074 | goto out; |
1edfb1af JB |
1075 | } |
1076 | ||
1077 | /* | |
1078 | * If the current MPDU is in the right order and nothing else | |
1079 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
1080 | * If it is first but there's something stored, we may be able |
1081 | * to release frames after this one. | |
1edfb1af JB |
1082 | */ |
1083 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
1084 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
1085 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
1086 | tid_agg_rx->head_seq_num = | |
1087 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
1088 | ret = false; |
1089 | goto out; | |
1edfb1af JB |
1090 | } |
1091 | ||
1092 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
1093 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
1094 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
1095 | tid_agg_rx->reorder_time[index] = jiffies; | |
1096 | tid_agg_rx->stored_mpdu_num++; | |
1097 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
1098 | } | |
1edfb1af | 1099 | |
2bff8ebf CL |
1100 | out: |
1101 | spin_unlock(&tid_agg_rx->reorder_lock); | |
1102 | return ret; | |
1edfb1af JB |
1103 | } |
1104 | ||
1105 | /* | |
1106 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
1107 | * true if the MPDU was buffered, false if it should be processed. | |
1108 | */ | |
f9e124fb CL |
1109 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
1110 | struct sk_buff_head *frames) | |
1edfb1af | 1111 | { |
2569a826 JB |
1112 | struct sk_buff *skb = rx->skb; |
1113 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 1114 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
2569a826 | 1115 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
1116 | struct tid_ampdu_rx *tid_agg_rx; |
1117 | u16 sc; | |
6cc00d54 | 1118 | u8 tid, ack_policy; |
1edfb1af | 1119 | |
051a41fa JB |
1120 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
1121 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 1122 | goto dont_reorder; |
1edfb1af JB |
1123 | |
1124 | /* | |
1125 | * filter the QoS data rx stream according to | |
1126 | * STA/TID and check if this STA/TID is on aggregation | |
1127 | */ | |
1128 | ||
1edfb1af | 1129 | if (!sta) |
2569a826 | 1130 | goto dont_reorder; |
1edfb1af | 1131 | |
6cc00d54 TP |
1132 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
1133 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
1134 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
1135 | ||
a87f736d | 1136 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
bfe40fa3 JB |
1137 | if (!tid_agg_rx) { |
1138 | if (ack_policy == IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1139 | !test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) && | |
1140 | !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg)) | |
1141 | ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid, | |
1142 | WLAN_BACK_RECIPIENT, | |
1143 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
a87f736d | 1144 | goto dont_reorder; |
bfe40fa3 | 1145 | } |
1edfb1af JB |
1146 | |
1147 | /* qos null data frames are excluded */ | |
1148 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1149 | goto dont_reorder; |
1edfb1af | 1150 | |
6cc00d54 TP |
1151 | /* not part of a BA session */ |
1152 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1153 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1154 | goto dont_reorder; | |
1155 | ||
1edfb1af JB |
1156 | /* new, potentially un-ordered, ampdu frame - process it */ |
1157 | ||
1158 | /* reset session timer */ | |
1159 | if (tid_agg_rx->timeout) | |
12d3952f | 1160 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1161 | |
1162 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1163 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1164 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1165 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1166 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1167 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1168 | return; |
1edfb1af JB |
1169 | } |
1170 | ||
a87f736d JB |
1171 | /* |
1172 | * No locking needed -- we will only ever process one | |
1173 | * RX packet at a time, and thus own tid_agg_rx. All | |
1174 | * other code manipulating it needs to (and does) make | |
1175 | * sure that we cannot get to it any more before doing | |
1176 | * anything with it. | |
1177 | */ | |
f9e124fb CL |
1178 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1179 | frames)) | |
2569a826 JB |
1180 | return; |
1181 | ||
1182 | dont_reorder: | |
f9e124fb | 1183 | __skb_queue_tail(frames, skb); |
1edfb1af | 1184 | } |
33b64eb2 | 1185 | |
49461622 | 1186 | static ieee80211_rx_result debug_noinline |
0395442a | 1187 | ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) |
571ecf67 | 1188 | { |
a7767f95 | 1189 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1190 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1191 | |
f9cfa5f3 SS |
1192 | if (status->flag & RX_FLAG_DUP_VALIDATED) |
1193 | return RX_CONTINUE; | |
1194 | ||
6b0f3274 JB |
1195 | /* |
1196 | * Drop duplicate 802.11 retransmissions | |
1197 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1198 | */ | |
0395442a JB |
1199 | |
1200 | if (rx->skb->len < 24) | |
1201 | return RX_CONTINUE; | |
1202 | ||
1203 | if (ieee80211_is_ctl(hdr->frame_control) || | |
1204 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
1205 | is_multicast_ether_addr(hdr->addr1)) | |
1206 | return RX_CONTINUE; | |
1207 | ||
a732fa70 JB |
1208 | if (!rx->sta) |
1209 | return RX_CONTINUE; | |
1210 | ||
1211 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && | |
1212 | rx->sta->last_seq_ctrl[rx->seqno_idx] == hdr->seq_ctrl)) { | |
1213 | I802_DEBUG_INC(rx->local->dot11FrameDuplicateCount); | |
e5a9f8d0 | 1214 | rx->sta->rx_stats.num_duplicates++; |
a732fa70 JB |
1215 | return RX_DROP_UNUSABLE; |
1216 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
1217 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; | |
571ecf67 JB |
1218 | } |
1219 | ||
0395442a JB |
1220 | return RX_CONTINUE; |
1221 | } | |
1222 | ||
1223 | static ieee80211_rx_result debug_noinline | |
1224 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) | |
1225 | { | |
1226 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
1227 | ||
571ecf67 JB |
1228 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1229 | * IEEE 802.11, Chap 5.5. | |
1230 | * | |
ccd7b362 JB |
1231 | * mac80211 filters only based on association state, i.e. it drops |
1232 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1233 | * deauth/disassoc frames when needed. In addition, hostapd is |
1234 | * responsible for filtering on both auth and assoc states. | |
1235 | */ | |
33b64eb2 | 1236 | |
902acc78 | 1237 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1238 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1239 | |
a7767f95 HH |
1240 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1241 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1242 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1243 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1244 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1245 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1246 | /* |
1247 | * accept port control frames from the AP even when it's not | |
1248 | * yet marked ASSOC to prevent a race where we don't set the | |
1249 | * assoc bit quickly enough before it sends the first frame | |
1250 | */ | |
1251 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1252 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1253 | unsigned int hdrlen; |
1254 | __be16 ethertype; | |
1255 | ||
1256 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1257 | ||
1258 | if (rx->skb->len < hdrlen + 8) | |
1259 | return RX_DROP_MONITOR; | |
1260 | ||
1261 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1262 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1263 | return RX_CONTINUE; |
1264 | } | |
21fc7560 JB |
1265 | |
1266 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1267 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1268 | hdr->addr2, | |
1269 | GFP_ATOMIC)) | |
1270 | return RX_DROP_UNUSABLE; | |
1271 | ||
e4c26add | 1272 | return RX_DROP_MONITOR; |
2a33bee2 | 1273 | } |
571ecf67 | 1274 | |
9ae54c84 | 1275 | return RX_CONTINUE; |
570bd537 JB |
1276 | } |
1277 | ||
1278 | ||
572e0012 KV |
1279 | static ieee80211_rx_result debug_noinline |
1280 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1281 | { | |
1282 | struct ieee80211_local *local; | |
1283 | struct ieee80211_hdr *hdr; | |
1284 | struct sk_buff *skb; | |
1285 | ||
1286 | local = rx->local; | |
1287 | skb = rx->skb; | |
1288 | hdr = (struct ieee80211_hdr *) skb->data; | |
1289 | ||
1290 | if (!local->pspolling) | |
1291 | return RX_CONTINUE; | |
1292 | ||
1293 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1294 | /* this is not from AP */ | |
1295 | return RX_CONTINUE; | |
1296 | ||
1297 | if (!ieee80211_is_data(hdr->frame_control)) | |
1298 | return RX_CONTINUE; | |
1299 | ||
1300 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1301 | /* AP has no more frames buffered for us */ | |
1302 | local->pspolling = false; | |
1303 | return RX_CONTINUE; | |
1304 | } | |
1305 | ||
1306 | /* more data bit is set, let's request a new frame from the AP */ | |
1307 | ieee80211_send_pspoll(local, rx->sdata); | |
1308 | ||
1309 | return RX_CONTINUE; | |
1310 | } | |
1311 | ||
d012a605 | 1312 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1313 | { |
133b8226 | 1314 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1315 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1316 | struct ps_data *ps; |
ba8c3d6f | 1317 | int tid; |
0795af57 | 1318 | |
d012a605 MP |
1319 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1320 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1321 | ps = &sdata->bss->ps; | |
1322 | else | |
1323 | return; | |
1324 | ||
1325 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1326 | set_sta_flag(sta, WLAN_STA_PS_STA); |
30686bf7 | 1327 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1328 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
bdcbd8e0 JB |
1329 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1330 | sta->sta.addr, sta->sta.aid); | |
ba8c3d6f | 1331 | |
17c18bf8 JB |
1332 | ieee80211_clear_fast_xmit(sta); |
1333 | ||
ba8c3d6f FF |
1334 | if (!sta->sta.txq[0]) |
1335 | return; | |
1336 | ||
1337 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
bb42f2d1 | 1338 | if (txq_has_queue(sta->sta.txq[tid])) |
ba8c3d6f FF |
1339 | set_bit(tid, &sta->txq_buffered_tids); |
1340 | else | |
1341 | clear_bit(tid, &sta->txq_buffered_tids); | |
1342 | } | |
571ecf67 JB |
1343 | } |
1344 | ||
d012a605 | 1345 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1346 | { |
bdcbd8e0 JB |
1347 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1348 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1349 | |
c2c98fde | 1350 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1351 | /* |
1352 | * Clear the flag only if the other one is still set | |
1353 | * so that the TX path won't start TX'ing new frames | |
1354 | * directly ... In the case that the driver flag isn't | |
1355 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1356 | */ | |
1357 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1358 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1359 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1360 | return; |
1361 | } | |
1362 | ||
5ac2e350 JB |
1363 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1364 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1365 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1366 | } |
1367 | ||
cf47161a | 1368 | int ieee80211_sta_ps_transition(struct ieee80211_sta *pubsta, bool start) |
d057e5a3 | 1369 | { |
cf47161a | 1370 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
d057e5a3 AN |
1371 | bool in_ps; |
1372 | ||
cf47161a | 1373 | WARN_ON(!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS)); |
d057e5a3 AN |
1374 | |
1375 | /* Don't let the same PS state be set twice */ | |
cf47161a | 1376 | in_ps = test_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1377 | if ((start && in_ps) || (!start && !in_ps)) |
1378 | return -EINVAL; | |
1379 | ||
1380 | if (start) | |
cf47161a | 1381 | sta_ps_start(sta); |
d057e5a3 | 1382 | else |
cf47161a | 1383 | sta_ps_end(sta); |
d057e5a3 AN |
1384 | |
1385 | return 0; | |
1386 | } | |
1387 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1388 | ||
46fa38e8 JB |
1389 | void ieee80211_sta_pspoll(struct ieee80211_sta *pubsta) |
1390 | { | |
1391 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1392 | ||
1393 | if (test_sta_flag(sta, WLAN_STA_SP)) | |
1394 | return; | |
1395 | ||
1396 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1397 | ieee80211_sta_ps_deliver_poll_response(sta); | |
1398 | else | |
1399 | set_sta_flag(sta, WLAN_STA_PSPOLL); | |
1400 | } | |
1401 | EXPORT_SYMBOL(ieee80211_sta_pspoll); | |
1402 | ||
1403 | void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *pubsta, u8 tid) | |
1404 | { | |
1405 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
731977e9 | 1406 | int ac = ieee80211_ac_from_tid(tid); |
46fa38e8 JB |
1407 | |
1408 | /* | |
0aa419ec EG |
1409 | * If this AC is not trigger-enabled do nothing unless the |
1410 | * driver is calling us after it already checked. | |
46fa38e8 JB |
1411 | * |
1412 | * NB: This could/should check a separate bitmap of trigger- | |
1413 | * enabled queues, but for now we only implement uAPSD w/o | |
1414 | * TSPEC changes to the ACs, so they're always the same. | |
1415 | */ | |
f438ceb8 EG |
1416 | if (!(sta->sta.uapsd_queues & ieee80211_ac_to_qos_mask[ac]) && |
1417 | tid != IEEE80211_NUM_TIDS) | |
46fa38e8 JB |
1418 | return; |
1419 | ||
1420 | /* if we are in a service period, do nothing */ | |
1421 | if (test_sta_flag(sta, WLAN_STA_SP)) | |
1422 | return; | |
1423 | ||
1424 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1425 | ieee80211_sta_ps_deliver_uapsd(sta); | |
1426 | else | |
1427 | set_sta_flag(sta, WLAN_STA_UAPSD); | |
1428 | } | |
1429 | EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger); | |
1430 | ||
47086fc5 JB |
1431 | static ieee80211_rx_result debug_noinline |
1432 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1433 | { | |
1434 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1435 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1436 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
47086fc5 | 1437 | |
5c90067c | 1438 | if (!rx->sta) |
47086fc5 JB |
1439 | return RX_CONTINUE; |
1440 | ||
1441 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1442 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1443 | return RX_CONTINUE; | |
1444 | ||
1445 | /* | |
1446 | * The device handles station powersave, so don't do anything about | |
1447 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1448 | * it to mac80211 since they're handled.) | |
1449 | */ | |
30686bf7 | 1450 | if (ieee80211_hw_check(&sdata->local->hw, AP_LINK_PS)) |
47086fc5 JB |
1451 | return RX_CONTINUE; |
1452 | ||
1453 | /* | |
1454 | * Don't do anything if the station isn't already asleep. In | |
1455 | * the uAPSD case, the station will probably be marked asleep, | |
1456 | * in the PS-Poll case the station must be confused ... | |
1457 | */ | |
c2c98fde | 1458 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1459 | return RX_CONTINUE; |
1460 | ||
1461 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
46fa38e8 | 1462 | ieee80211_sta_pspoll(&rx->sta->sta); |
47086fc5 JB |
1463 | |
1464 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1465 | * count as an dropped frame. */ | |
1466 | dev_kfree_skb(rx->skb); | |
1467 | ||
1468 | return RX_QUEUED; | |
1469 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1470 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1471 | ieee80211_has_pm(hdr->frame_control) && | |
1472 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1473 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
46fa38e8 | 1474 | u8 tid; |
47086fc5 | 1475 | |
46fa38e8 | 1476 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
47086fc5 | 1477 | |
46fa38e8 | 1478 | ieee80211_sta_uapsd_trigger(&rx->sta->sta, tid); |
47086fc5 JB |
1479 | } |
1480 | ||
1481 | return RX_CONTINUE; | |
1482 | } | |
1483 | ||
49461622 | 1484 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1485 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1486 | { |
1487 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1488 | struct sk_buff *skb = rx->skb; |
1489 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1490 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1491 | int i; |
571ecf67 JB |
1492 | |
1493 | if (!sta) | |
9ae54c84 | 1494 | return RX_CONTINUE; |
571ecf67 | 1495 | |
b291ba11 JB |
1496 | /* |
1497 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1498 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1499 | * current IBSS network alive in cases where other STAs start | |
1500 | * using different BSSID. This will also give the station another | |
1501 | * chance to restart the authentication/authorization in case | |
1502 | * something went wrong the first time. | |
b291ba11 | 1503 | */ |
05c914fe | 1504 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1505 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1506 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1507 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1508 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
e5a9f8d0 | 1509 | sta->rx_stats.last_rx = jiffies; |
f4ebddf9 | 1510 | if (ieee80211_is_data(hdr->frame_control) && |
4f6b1b3d JB |
1511 | !is_multicast_ether_addr(hdr->addr1)) |
1512 | sta->rx_stats.last_rate = | |
1513 | sta_stats_encode_rate(status); | |
3af6334c | 1514 | } |
239281f8 | 1515 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
e5a9f8d0 | 1516 | sta->rx_stats.last_rx = jiffies; |
b291ba11 JB |
1517 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1518 | /* | |
33b64eb2 LCC |
1519 | * Mesh beacons will update last_rx when if they are found to |
1520 | * match the current local configuration when processed. | |
571ecf67 | 1521 | */ |
e5a9f8d0 | 1522 | sta->rx_stats.last_rx = jiffies; |
4f6b1b3d JB |
1523 | if (ieee80211_is_data(hdr->frame_control)) |
1524 | sta->rx_stats.last_rate = sta_stats_encode_rate(status); | |
571ecf67 JB |
1525 | } |
1526 | ||
3cf335d5 KV |
1527 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1528 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1529 | ||
e5a9f8d0 | 1530 | sta->rx_stats.fragments++; |
0f9c5a61 JB |
1531 | |
1532 | u64_stats_update_begin(&rx->sta->rx_stats.syncp); | |
e5a9f8d0 | 1533 | sta->rx_stats.bytes += rx->skb->len; |
0f9c5a61 JB |
1534 | u64_stats_update_end(&rx->sta->rx_stats.syncp); |
1535 | ||
fe8431f8 | 1536 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
e5a9f8d0 | 1537 | sta->rx_stats.last_signal = status->signal; |
0be6ed13 | 1538 | ewma_signal_add(&sta->rx_stats_avg.signal, -status->signal); |
fe8431f8 | 1539 | } |
571ecf67 | 1540 | |
ef0621e8 | 1541 | if (status->chains) { |
e5a9f8d0 | 1542 | sta->rx_stats.chains = status->chains; |
ef0621e8 FF |
1543 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
1544 | int signal = status->chain_signal[i]; | |
1545 | ||
1546 | if (!(status->chains & BIT(i))) | |
1547 | continue; | |
1548 | ||
e5a9f8d0 | 1549 | sta->rx_stats.chain_signal_last[i] = signal; |
0be6ed13 | 1550 | ewma_signal_add(&sta->rx_stats_avg.chain_signal[i], |
e5a9f8d0 | 1551 | -signal); |
ef0621e8 FF |
1552 | } |
1553 | } | |
1554 | ||
72eaa43a JB |
1555 | /* |
1556 | * Change STA power saving mode only at the end of a frame | |
1557 | * exchange sequence. | |
1558 | */ | |
30686bf7 | 1559 | if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) && |
d057e5a3 | 1560 | !ieee80211_has_morefrags(hdr->frame_control) && |
4cfda47b | 1561 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1562 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1563 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1564 | /* PM bit is only checked in frames where it isn't reserved, | |
1565 | * in AP mode it's reserved in non-bufferable management frames | |
1566 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1567 | */ | |
1568 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1569 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1570 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1571 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1572 | sta_ps_end(sta); |
72eaa43a JB |
1573 | } else { |
1574 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1575 | sta_ps_start(sta); |
72eaa43a | 1576 | } |
571ecf67 JB |
1577 | } |
1578 | ||
3f52b7e3 MP |
1579 | /* mesh power save support */ |
1580 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1581 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1582 | ||
22403def JB |
1583 | /* |
1584 | * Drop (qos-)data::nullfunc frames silently, since they | |
1585 | * are used only to control station power saving mode. | |
1586 | */ | |
1587 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1588 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1589 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1590 | |
1591 | /* | |
1592 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1593 | * that was not moved to a 4-addr STA vlan yet send |
1594 | * the event to userspace and for older hostapd drop | |
1595 | * the frame to the monitor interface. | |
d524215f FF |
1596 | */ |
1597 | if (ieee80211_has_a4(hdr->frame_control) && | |
1598 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1599 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1600 | !rx->sdata->u.vlan.sta))) { |
1601 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1602 | cfg80211_rx_unexpected_4addr_frame( | |
1603 | rx->sdata->dev, sta->sta.addr, | |
1604 | GFP_ATOMIC); | |
d524215f | 1605 | return RX_DROP_MONITOR; |
e7f4a940 | 1606 | } |
22403def JB |
1607 | /* |
1608 | * Update counter and free packet here to avoid | |
1609 | * counting this as a dropped packed. | |
1610 | */ | |
e5a9f8d0 | 1611 | sta->rx_stats.packets++; |
571ecf67 | 1612 | dev_kfree_skb(rx->skb); |
9ae54c84 | 1613 | return RX_QUEUED; |
571ecf67 JB |
1614 | } |
1615 | ||
9ae54c84 | 1616 | return RX_CONTINUE; |
571ecf67 JB |
1617 | } /* ieee80211_rx_h_sta_process */ |
1618 | ||
86c228a7 JA |
1619 | static ieee80211_rx_result debug_noinline |
1620 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1621 | { | |
1622 | struct sk_buff *skb = rx->skb; | |
1623 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1624 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1625 | int keyidx; | |
1626 | int hdrlen; | |
1627 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1628 | struct ieee80211_key *sta_ptk = NULL; | |
1629 | int mmie_keyidx = -1; | |
1630 | __le16 fc; | |
2475b1cc | 1631 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1632 | |
1633 | /* | |
1634 | * Key selection 101 | |
1635 | * | |
1636 | * There are four types of keys: | |
1637 | * - GTK (group keys) | |
1638 | * - IGTK (group keys for management frames) | |
1639 | * - PTK (pairwise keys) | |
1640 | * - STK (station-to-station pairwise keys) | |
1641 | * | |
1642 | * When selecting a key, we have to distinguish between multicast | |
1643 | * (including broadcast) and unicast frames, the latter can only | |
1644 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1645 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1646 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1647 | * don't have a PTK/STK we check the key index for a WEP key. | |
1648 | * | |
1649 | * Note that in a regular BSS, multicast frames are sent by the | |
1650 | * AP only, associated stations unicast the frame to the AP first | |
1651 | * which then multicasts it on their behalf. | |
1652 | * | |
1653 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1654 | * with each station, that is something we don't currently handle. | |
1655 | * The spec seems to expect that one negotiates the same key with | |
1656 | * every station but there's no such requirement; VLANs could be | |
1657 | * possible. | |
1658 | */ | |
1659 | ||
86c228a7 JA |
1660 | /* start without a key */ |
1661 | rx->key = NULL; | |
2475b1cc | 1662 | fc = hdr->frame_control; |
86c228a7 | 1663 | |
2475b1cc MS |
1664 | if (rx->sta) { |
1665 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1666 | |
2475b1cc MS |
1667 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1668 | cs = rx->sta->cipher_scheme; | |
2c61cf9c | 1669 | keyid = ieee80211_get_cs_keyid(cs, rx->skb); |
2475b1cc MS |
1670 | if (unlikely(keyid < 0)) |
1671 | return RX_DROP_UNUSABLE; | |
1672 | } | |
1673 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1674 | } | |
86c228a7 JA |
1675 | |
1676 | if (!ieee80211_has_protected(fc)) | |
1677 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1678 | ||
1679 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1680 | rx->key = sta_ptk; | |
1681 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1682 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1683 | return RX_CONTINUE; | |
1684 | /* Skip decryption if the frame is not protected. */ | |
1685 | if (!ieee80211_has_protected(fc)) | |
1686 | return RX_CONTINUE; | |
1687 | } else if (mmie_keyidx >= 0) { | |
1688 | /* Broadcast/multicast robust management frame / BIP */ | |
1689 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1690 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1691 | return RX_CONTINUE; | |
1692 | ||
1693 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1694 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1695 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
46f6b060 MH |
1696 | if (rx->sta) { |
1697 | if (ieee80211_is_group_privacy_action(skb) && | |
1698 | test_sta_flag(rx->sta, WLAN_STA_MFP)) | |
1699 | return RX_DROP_MONITOR; | |
1700 | ||
86c228a7 | 1701 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); |
46f6b060 | 1702 | } |
86c228a7 JA |
1703 | if (!rx->key) |
1704 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1705 | } else if (!ieee80211_has_protected(fc)) { | |
1706 | /* | |
1707 | * The frame was not protected, so skip decryption. However, we | |
1708 | * need to set rx->key if there is a key that could have been | |
1709 | * used so that the frame may be dropped if encryption would | |
1710 | * have been expected. | |
1711 | */ | |
1712 | struct ieee80211_key *key = NULL; | |
1713 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1714 | int i; | |
1715 | ||
1716 | if (ieee80211_is_mgmt(fc) && | |
1717 | is_multicast_ether_addr(hdr->addr1) && | |
1718 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1719 | rx->key = key; | |
1720 | else { | |
1721 | if (rx->sta) { | |
1722 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1723 | key = rcu_dereference(rx->sta->gtk[i]); | |
1724 | if (key) | |
1725 | break; | |
1726 | } | |
1727 | } | |
1728 | if (!key) { | |
1729 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1730 | key = rcu_dereference(sdata->keys[i]); | |
1731 | if (key) | |
1732 | break; | |
1733 | } | |
1734 | } | |
1735 | if (key) | |
1736 | rx->key = key; | |
1737 | } | |
1738 | return RX_CONTINUE; | |
1739 | } else { | |
1740 | u8 keyid; | |
2475b1cc | 1741 | |
86c228a7 JA |
1742 | /* |
1743 | * The device doesn't give us the IV so we won't be | |
1744 | * able to look up the key. That's ok though, we | |
1745 | * don't need to decrypt the frame, we just won't | |
1746 | * be able to keep statistics accurate. | |
1747 | * Except for key threshold notifications, should | |
1748 | * we somehow allow the driver to tell us which key | |
1749 | * the hardware used if this flag is set? | |
1750 | */ | |
1751 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1752 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1753 | return RX_CONTINUE; | |
1754 | ||
1755 | hdrlen = ieee80211_hdrlen(fc); | |
1756 | ||
2475b1cc | 1757 | if (cs) { |
2c61cf9c | 1758 | keyidx = ieee80211_get_cs_keyid(cs, rx->skb); |
86c228a7 | 1759 | |
2475b1cc MS |
1760 | if (unlikely(keyidx < 0)) |
1761 | return RX_DROP_UNUSABLE; | |
1762 | } else { | |
1763 | if (rx->skb->len < 8 + hdrlen) | |
1764 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1765 | /* | |
1766 | * no need to call ieee80211_wep_get_keyidx, | |
1767 | * it verifies a bunch of things we've done already | |
1768 | */ | |
1769 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1770 | keyidx = keyid >> 6; | |
1771 | } | |
86c228a7 JA |
1772 | |
1773 | /* check per-station GTK first, if multicast packet */ | |
1774 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1775 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1776 | ||
1777 | /* if not found, try default key */ | |
1778 | if (!rx->key) { | |
1779 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1780 | ||
1781 | /* | |
1782 | * RSNA-protected unicast frames should always be | |
1783 | * sent with pairwise or station-to-station keys, | |
1784 | * but for WEP we allow using a key index as well. | |
1785 | */ | |
1786 | if (rx->key && | |
1787 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1788 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1789 | !is_multicast_ether_addr(hdr->addr1)) | |
1790 | rx->key = NULL; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | if (rx->key) { | |
1795 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1796 | return RX_DROP_MONITOR; | |
1797 | ||
86c228a7 JA |
1798 | /* TODO: add threshold stuff again */ |
1799 | } else { | |
1800 | return RX_DROP_MONITOR; | |
1801 | } | |
1802 | ||
1803 | switch (rx->key->conf.cipher) { | |
1804 | case WLAN_CIPHER_SUITE_WEP40: | |
1805 | case WLAN_CIPHER_SUITE_WEP104: | |
1806 | result = ieee80211_crypto_wep_decrypt(rx); | |
1807 | break; | |
1808 | case WLAN_CIPHER_SUITE_TKIP: | |
1809 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1810 | break; | |
1811 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db JM |
1812 | result = ieee80211_crypto_ccmp_decrypt( |
1813 | rx, IEEE80211_CCMP_MIC_LEN); | |
1814 | break; | |
1815 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1816 | result = ieee80211_crypto_ccmp_decrypt( | |
1817 | rx, IEEE80211_CCMP_256_MIC_LEN); | |
86c228a7 JA |
1818 | break; |
1819 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1820 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1821 | break; | |
56c52da2 JM |
1822 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1823 | result = ieee80211_crypto_aes_cmac_256_decrypt(rx); | |
1824 | break; | |
8ade538b JM |
1825 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1826 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1827 | result = ieee80211_crypto_aes_gmac_decrypt(rx); | |
1828 | break; | |
00b9cfa3 JM |
1829 | case WLAN_CIPHER_SUITE_GCMP: |
1830 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1831 | result = ieee80211_crypto_gcmp_decrypt(rx); | |
1832 | break; | |
86c228a7 | 1833 | default: |
2475b1cc | 1834 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1835 | } |
1836 | ||
1837 | /* the hdr variable is invalid after the decrypt handlers */ | |
1838 | ||
1839 | /* either the frame has been decrypted or will be dropped */ | |
1840 | status->flag |= RX_FLAG_DECRYPTED; | |
1841 | ||
1842 | return result; | |
1843 | } | |
1844 | ||
571ecf67 JB |
1845 | static inline struct ieee80211_fragment_entry * |
1846 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1847 | unsigned int frag, unsigned int seq, int rx_queue, | |
1848 | struct sk_buff **skb) | |
1849 | { | |
1850 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1851 | |
571ecf67 JB |
1852 | entry = &sdata->fragments[sdata->fragment_next++]; |
1853 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1854 | sdata->fragment_next = 0; | |
1855 | ||
bdcbd8e0 | 1856 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1857 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1858 | |
1859 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1860 | *skb = NULL; | |
1861 | entry->first_frag_time = jiffies; | |
1862 | entry->seq = seq; | |
1863 | entry->rx_queue = rx_queue; | |
1864 | entry->last_frag = frag; | |
9acc54be | 1865 | entry->check_sequential_pn = false; |
571ecf67 JB |
1866 | entry->extra_len = 0; |
1867 | ||
1868 | return entry; | |
1869 | } | |
1870 | ||
1871 | static inline struct ieee80211_fragment_entry * | |
1872 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1873 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1874 | int rx_queue, struct ieee80211_hdr *hdr) |
1875 | { | |
1876 | struct ieee80211_fragment_entry *entry; | |
1877 | int i, idx; | |
1878 | ||
1879 | idx = sdata->fragment_next; | |
1880 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1881 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1882 | |
1883 | idx--; | |
1884 | if (idx < 0) | |
1885 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1886 | ||
1887 | entry = &sdata->fragments[idx]; | |
1888 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1889 | entry->rx_queue != rx_queue || | |
1890 | entry->last_frag + 1 != frag) | |
1891 | continue; | |
1892 | ||
b73d70ad | 1893 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1894 | |
b73d70ad HH |
1895 | /* |
1896 | * Check ftype and addresses are equal, else check next fragment | |
1897 | */ | |
1898 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1899 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1900 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1901 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1902 | continue; |
1903 | ||
ab46623e | 1904 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1905 | __skb_queue_purge(&entry->skb_list); |
1906 | continue; | |
1907 | } | |
1908 | return entry; | |
1909 | } | |
1910 | ||
1911 | return NULL; | |
1912 | } | |
1913 | ||
49461622 | 1914 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1915 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1916 | { |
1917 | struct ieee80211_hdr *hdr; | |
1918 | u16 sc; | |
358c8d9d | 1919 | __le16 fc; |
571ecf67 JB |
1920 | unsigned int frag, seq; |
1921 | struct ieee80211_fragment_entry *entry; | |
1922 | struct sk_buff *skb; | |
1923 | ||
b73d70ad | 1924 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1925 | fc = hdr->frame_control; |
f7fbf70e JC |
1926 | |
1927 | if (ieee80211_is_ctl(fc)) | |
1928 | return RX_CONTINUE; | |
1929 | ||
571ecf67 JB |
1930 | sc = le16_to_cpu(hdr->seq_ctrl); |
1931 | frag = sc & IEEE80211_SCTL_FRAG; | |
1932 | ||
b8fff407 | 1933 | if (is_multicast_ether_addr(hdr->addr1)) { |
c206ca67 | 1934 | I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount); |
d025933e | 1935 | goto out_no_led; |
571ecf67 | 1936 | } |
b8fff407 | 1937 | |
d025933e AM |
1938 | if (likely(!ieee80211_has_morefrags(fc) && frag == 0)) |
1939 | goto out; | |
1940 | ||
571ecf67 JB |
1941 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
1942 | ||
e3cf8b3f ZY |
1943 | if (skb_linearize(rx->skb)) |
1944 | return RX_DROP_UNUSABLE; | |
1945 | ||
058897a4 AK |
1946 | /* |
1947 | * skb_linearize() might change the skb->data and | |
1948 | * previously cached variables (in this case, hdr) need to | |
1949 | * be refreshed with the new data. | |
1950 | */ | |
1951 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1952 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1953 | ||
1954 | if (frag == 0) { | |
1955 | /* This is the first fragment of a new frame. */ | |
1956 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1957 | rx->seqno_idx, &(rx->skb)); |
2b2ba0db JM |
1958 | if (rx->key && |
1959 | (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP || | |
9acc54be JB |
1960 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256 || |
1961 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP || | |
1962 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP_256) && | |
358c8d9d | 1963 | ieee80211_has_protected(fc)) { |
9e26297a | 1964 | int queue = rx->security_idx; |
9acc54be JB |
1965 | |
1966 | /* Store CCMP/GCMP PN so that we can verify that the | |
1967 | * next fragment has a sequential PN value. | |
1968 | */ | |
1969 | entry->check_sequential_pn = true; | |
571ecf67 | 1970 | memcpy(entry->last_pn, |
9190252c | 1971 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1972 | IEEE80211_CCMP_PN_LEN); |
9acc54be JB |
1973 | BUILD_BUG_ON(offsetof(struct ieee80211_key, |
1974 | u.ccmp.rx_pn) != | |
1975 | offsetof(struct ieee80211_key, | |
1976 | u.gcmp.rx_pn)); | |
1977 | BUILD_BUG_ON(sizeof(rx->key->u.ccmp.rx_pn[queue]) != | |
1978 | sizeof(rx->key->u.gcmp.rx_pn[queue])); | |
1979 | BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != | |
1980 | IEEE80211_GCMP_PN_LEN); | |
571ecf67 | 1981 | } |
9ae54c84 | 1982 | return RX_QUEUED; |
571ecf67 JB |
1983 | } |
1984 | ||
1985 | /* This is a fragment for a frame that should already be pending in | |
1986 | * fragment cache. Add this fragment to the end of the pending entry. | |
1987 | */ | |
9e26297a JB |
1988 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1989 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1990 | if (!entry) { |
1991 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1992 | return RX_DROP_MONITOR; |
571ecf67 JB |
1993 | } |
1994 | ||
9acc54be JB |
1995 | /* "The receiver shall discard MSDUs and MMPDUs whose constituent |
1996 | * MPDU PN values are not incrementing in steps of 1." | |
1997 | * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP) | |
1998 | * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP) | |
1999 | */ | |
2000 | if (entry->check_sequential_pn) { | |
571ecf67 | 2001 | int i; |
4325f6ca | 2002 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 2003 | int queue; |
9acc54be | 2004 | |
2b2ba0db JM |
2005 | if (!rx->key || |
2006 | (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP && | |
9acc54be JB |
2007 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256 && |
2008 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP && | |
2009 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP_256)) | |
e4c26add | 2010 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
2011 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
2012 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
2013 | pn[i]++; |
2014 | if (pn[i]) | |
2015 | break; | |
2016 | } | |
9e26297a | 2017 | queue = rx->security_idx; |
9190252c | 2018 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 2019 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 2020 | return RX_DROP_UNUSABLE; |
4325f6ca | 2021 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
2022 | } |
2023 | ||
358c8d9d | 2024 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
2025 | __skb_queue_tail(&entry->skb_list, rx->skb); |
2026 | entry->last_frag = frag; | |
2027 | entry->extra_len += rx->skb->len; | |
358c8d9d | 2028 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 2029 | rx->skb = NULL; |
9ae54c84 | 2030 | return RX_QUEUED; |
571ecf67 JB |
2031 | } |
2032 | ||
2033 | rx->skb = __skb_dequeue(&entry->skb_list); | |
2034 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
f1160434 | 2035 | I802_DEBUG_INC(rx->local->rx_expand_skb_head_defrag); |
571ecf67 JB |
2036 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
2037 | GFP_ATOMIC))) { | |
2038 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
2039 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 2040 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
2041 | } |
2042 | } | |
2043 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
2044 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
2045 | dev_kfree_skb(skb); | |
2046 | } | |
2047 | ||
571ecf67 | 2048 | out: |
d025933e AM |
2049 | ieee80211_led_rx(rx->local); |
2050 | out_no_led: | |
571ecf67 | 2051 | if (rx->sta) |
e5a9f8d0 | 2052 | rx->sta->rx_stats.packets++; |
9ae54c84 | 2053 | return RX_CONTINUE; |
571ecf67 JB |
2054 | } |
2055 | ||
1df332e8 | 2056 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 2057 | { |
1df332e8 | 2058 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 2059 | return -EACCES; |
571ecf67 | 2060 | |
76ee65bf | 2061 | return 0; |
571ecf67 JB |
2062 | } |
2063 | ||
1df332e8 | 2064 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 2065 | { |
eb9fb5b8 JB |
2066 | struct sk_buff *skb = rx->skb; |
2067 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
2068 | ||
3017b80b | 2069 | /* |
7848ba7d JB |
2070 | * Pass through unencrypted frames if the hardware has |
2071 | * decrypted them already. | |
3017b80b | 2072 | */ |
eb9fb5b8 | 2073 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 2074 | return 0; |
571ecf67 JB |
2075 | |
2076 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
2077 | if (unlikely(!ieee80211_has_protected(fc) && |
2078 | !ieee80211_is_nullfunc(fc) && | |
e8f4fb7c | 2079 | ieee80211_is_data(fc) && rx->key)) |
76ee65bf | 2080 | return -EACCES; |
bef5d1c7 JB |
2081 | |
2082 | return 0; | |
2083 | } | |
2084 | ||
1df332e8 | 2085 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
2086 | { |
2087 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 2088 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 2089 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 2090 | |
e3efca0a JM |
2091 | /* |
2092 | * Pass through unencrypted frames if the hardware has | |
2093 | * decrypted them already. | |
2094 | */ | |
2095 | if (status->flag & RX_FLAG_DECRYPTED) | |
2096 | return 0; | |
bef5d1c7 | 2097 | |
c2c98fde | 2098 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
2099 | if (unlikely(!ieee80211_has_protected(fc) && |
2100 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 2101 | rx->key)) { |
6ff57cf8 JB |
2102 | if (ieee80211_is_deauth(fc) || |
2103 | ieee80211_is_disassoc(fc)) | |
2104 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
2105 | rx->skb->data, | |
2106 | rx->skb->len); | |
f2ca3ea4 | 2107 | return -EACCES; |
cf4e594e | 2108 | } |
f2ca3ea4 | 2109 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 2110 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 2111 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
2112 | if (ieee80211_is_deauth(fc) || |
2113 | ieee80211_is_disassoc(fc)) | |
2114 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
2115 | rx->skb->data, | |
2116 | rx->skb->len); | |
f2ca3ea4 | 2117 | return -EACCES; |
cf4e594e | 2118 | } |
f2ca3ea4 JM |
2119 | /* |
2120 | * When using MFP, Action frames are not allowed prior to | |
2121 | * having configured keys. | |
2122 | */ | |
2123 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 2124 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
2125 | return -EACCES; |
2126 | } | |
b3fc9c6c | 2127 | |
76ee65bf | 2128 | return 0; |
571ecf67 JB |
2129 | } |
2130 | ||
76ee65bf | 2131 | static int |
4114fa21 | 2132 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 2133 | { |
eb9fb5b8 | 2134 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 2135 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
2136 | bool check_port_control = false; |
2137 | struct ethhdr *ehdr; | |
2138 | int ret; | |
f14543ee | 2139 | |
4114fa21 | 2140 | *port_control = false; |
9bc383de JB |
2141 | if (ieee80211_has_a4(hdr->frame_control) && |
2142 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 2143 | return -1; |
9bc383de | 2144 | |
fbb327c5 FF |
2145 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
2146 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
2147 | ||
2148 | if (!sdata->u.mgd.use_4addr) | |
2149 | return -1; | |
2150 | else | |
2151 | check_port_control = true; | |
2152 | } | |
2153 | ||
9bc383de | 2154 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 2155 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 2156 | return -1; |
571ecf67 | 2157 | |
fbb327c5 | 2158 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 2159 | if (ret < 0) |
fbb327c5 FF |
2160 | return ret; |
2161 | ||
2162 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
2163 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
2164 | *port_control = true; | |
2165 | else if (check_port_control) | |
fbb327c5 FF |
2166 | return -1; |
2167 | ||
2168 | return 0; | |
76ee65bf | 2169 | } |
571ecf67 | 2170 | |
ce3edf6d JB |
2171 | /* |
2172 | * requires that rx->skb is a frame with ethernet header | |
2173 | */ | |
358c8d9d | 2174 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 2175 | { |
c97c23e3 | 2176 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
2177 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
2178 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
2179 | ||
2180 | /* | |
2181 | * Allow EAPOL frames to us/the PAE group address regardless | |
2182 | * of whether the frame was encrypted or not. | |
2183 | */ | |
a621fa4d | 2184 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
2185 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
2186 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
2187 | return true; |
2188 | ||
2189 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 2190 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
2191 | return false; |
2192 | ||
2193 | return true; | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * requires that rx->skb is a frame with ethernet header | |
2198 | */ | |
76ee65bf | 2199 | static void |
5cf121c3 | 2200 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2201 | { |
eb9fb5b8 JB |
2202 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2203 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2204 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2205 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2206 | struct sta_info *dsta; | |
571ecf67 | 2207 | |
76ee65bf RR |
2208 | skb = rx->skb; |
2209 | xmit_skb = NULL; | |
571ecf67 | 2210 | |
5a490510 JB |
2211 | ieee80211_rx_stats(dev, skb->len); |
2212 | ||
de8f18d3 JB |
2213 | if (rx->sta) { |
2214 | /* The seqno index has the same property as needed | |
2215 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS | |
2216 | * for non-QoS-data frames. Here we know it's a data | |
2217 | * frame, so count MSDUs. | |
2218 | */ | |
0f9c5a61 | 2219 | u64_stats_update_begin(&rx->sta->rx_stats.syncp); |
de8f18d3 | 2220 | rx->sta->rx_stats.msdu[rx->seqno_idx]++; |
0f9c5a61 | 2221 | u64_stats_update_end(&rx->sta->rx_stats.syncp); |
de8f18d3 JB |
2222 | } |
2223 | ||
05c914fe JB |
2224 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2225 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2226 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
9bc383de | 2227 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
72f15d53 MB |
2228 | if (is_multicast_ether_addr(ehdr->h_dest) && |
2229 | ieee80211_vif_get_num_mcast_if(sdata) != 0) { | |
ce3edf6d JB |
2230 | /* |
2231 | * send multicast frames both to higher layers in | |
2232 | * local net stack and back to the wireless medium | |
2233 | */ | |
76ee65bf | 2234 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2235 | if (!xmit_skb) |
bdcbd8e0 | 2236 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2237 | dev->name); |
72f15d53 | 2238 | } else if (!is_multicast_ether_addr(ehdr->h_dest)) { |
abe60632 JB |
2239 | dsta = sta_info_get(sdata, skb->data); |
2240 | if (dsta) { | |
ce3edf6d JB |
2241 | /* |
2242 | * The destination station is associated to | |
2243 | * this AP (in this VLAN), so send the frame | |
2244 | * directly to it and do not pass it to local | |
2245 | * net stack. | |
571ecf67 | 2246 | */ |
76ee65bf | 2247 | xmit_skb = skb; |
571ecf67 JB |
2248 | skb = NULL; |
2249 | } | |
571ecf67 JB |
2250 | } |
2251 | } | |
2252 | ||
59d9cb07 | 2253 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2254 | if (skb) { |
2255 | /* 'align' will only take the values 0 or 2 here since all | |
2256 | * frames are required to be aligned to 2-byte boundaries | |
2257 | * when being passed to mac80211; the code here works just | |
2258 | * as well if that isn't true, but mac80211 assumes it can | |
2259 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2260 | */ |
9e890a1f JB |
2261 | int align; |
2262 | ||
2263 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2264 | if (align) { |
2265 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2266 | dev_kfree_skb(skb); | |
2267 | skb = NULL; | |
2268 | } else { | |
2269 | u8 *data = skb->data; | |
8ce0b589 ZY |
2270 | size_t len = skb_headlen(skb); |
2271 | skb->data -= align; | |
2272 | memmove(skb->data, data, len); | |
2273 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2274 | } |
2275 | } | |
9e890a1f | 2276 | } |
d1c3a37c JB |
2277 | #endif |
2278 | ||
9e890a1f JB |
2279 | if (skb) { |
2280 | /* deliver to local stack */ | |
2281 | skb->protocol = eth_type_trans(skb, dev); | |
2282 | memset(skb->cb, 0, sizeof(skb->cb)); | |
af9f9b22 JB |
2283 | if (rx->napi) |
2284 | napi_gro_receive(rx->napi, skb); | |
06d181a8 JB |
2285 | else |
2286 | netif_receive_skb(skb); | |
571ecf67 JB |
2287 | } |
2288 | ||
76ee65bf | 2289 | if (xmit_skb) { |
aef6c928 HS |
2290 | /* |
2291 | * Send to wireless media and increase priority by 256 to | |
2292 | * keep the received priority instead of reclassifying | |
2293 | * the frame (see cfg80211_classify8021d). | |
2294 | */ | |
2295 | xmit_skb->priority += 256; | |
f831e909 | 2296 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2297 | skb_reset_network_header(xmit_skb); |
2298 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2299 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2300 | } |
76ee65bf RR |
2301 | } |
2302 | ||
49461622 | 2303 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2304 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2305 | { |
eb9fb5b8 | 2306 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2307 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2308 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2309 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2310 | struct sk_buff_head frame_list; |
554891e6 | 2311 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
7f6990c8 | 2312 | struct ethhdr ethhdr; |
e2b5227f | 2313 | const u8 *check_da = ethhdr.h_dest, *check_sa = ethhdr.h_source; |
fd4c7f2f | 2314 | |
358c8d9d | 2315 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2316 | return RX_CONTINUE; |
fd4c7f2f | 2317 | |
358c8d9d | 2318 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2319 | return RX_DROP_MONITOR; |
fd4c7f2f | 2320 | |
554891e6 | 2321 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2322 | return RX_CONTINUE; |
fd4c7f2f | 2323 | |
ea720935 JB |
2324 | if (unlikely(ieee80211_has_a4(hdr->frame_control))) { |
2325 | switch (rx->sdata->vif.type) { | |
2326 | case NL80211_IFTYPE_AP_VLAN: | |
2327 | if (!rx->sdata->u.vlan.sta) | |
2328 | return RX_DROP_UNUSABLE; | |
2329 | break; | |
2330 | case NL80211_IFTYPE_STATION: | |
2331 | if (!rx->sdata->u.mgd.use_4addr) | |
2332 | return RX_DROP_UNUSABLE; | |
2333 | break; | |
2334 | default: | |
2335 | return RX_DROP_UNUSABLE; | |
2336 | } | |
e2b5227f JB |
2337 | check_da = NULL; |
2338 | check_sa = NULL; | |
2339 | } else switch (rx->sdata->vif.type) { | |
2340 | case NL80211_IFTYPE_AP: | |
2341 | case NL80211_IFTYPE_AP_VLAN: | |
2342 | check_da = NULL; | |
2343 | break; | |
2344 | case NL80211_IFTYPE_STATION: | |
2345 | if (!rx->sta || | |
2346 | !test_sta_flag(rx->sta, WLAN_STA_TDLS_PEER)) | |
2347 | check_sa = NULL; | |
2348 | break; | |
2349 | case NL80211_IFTYPE_MESH_POINT: | |
2350 | check_sa = NULL; | |
2351 | break; | |
2352 | default: | |
2353 | break; | |
ea720935 | 2354 | } |
fd4c7f2f | 2355 | |
ea720935 | 2356 | if (is_multicast_ether_addr(hdr->addr1)) |
e4c26add | 2357 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2358 | |
eaf85ca7 ZY |
2359 | skb->dev = dev; |
2360 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2361 | |
7f6990c8 JB |
2362 | if (ieee80211_data_to_8023_exthdr(skb, ðhdr, |
2363 | rx->sdata->vif.addr, | |
2364 | rx->sdata->vif.type)) | |
2365 | return RX_DROP_UNUSABLE; | |
2366 | ||
eaf85ca7 ZY |
2367 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2368 | rx->sdata->vif.type, | |
8b935ee2 | 2369 | rx->local->hw.extra_tx_headroom, |
e2b5227f | 2370 | check_da, check_sa); |
fd4c7f2f | 2371 | |
eaf85ca7 ZY |
2372 | while (!skb_queue_empty(&frame_list)) { |
2373 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2374 | |
358c8d9d | 2375 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2376 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2377 | continue; |
2378 | } | |
fd4c7f2f RR |
2379 | |
2380 | ieee80211_deliver_skb(rx); | |
2381 | } | |
2382 | ||
9ae54c84 | 2383 | return RX_QUEUED; |
fd4c7f2f RR |
2384 | } |
2385 | ||
bf94e17b | 2386 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2387 | static ieee80211_rx_result |
e32f85f7 LCC |
2388 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2389 | { | |
30789eb6 TP |
2390 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2391 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2392 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2393 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2394 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2395 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
30789eb6 | 2396 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
cf440128 | 2397 | u16 ac, q, hdrlen; |
e32f85f7 LCC |
2398 | |
2399 | hdr = (struct ieee80211_hdr *) skb->data; | |
2400 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2401 | |
2402 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2403 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2404 | return RX_DROP_MONITOR; | |
2405 | ||
2406 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2407 | ||
2408 | /* make sure full mesh header is there, also checks skb len */ | |
2409 | if (!pskb_may_pull(rx->skb, | |
2410 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2411 | return RX_DROP_MONITOR; | |
2412 | ||
2413 | /* reload pointers */ | |
2414 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2415 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2416 | ||
d0c22119 BC |
2417 | if (ieee80211_drop_unencrypted(rx, hdr->frame_control)) |
2418 | return RX_DROP_MONITOR; | |
2419 | ||
2157fdd6 TP |
2420 | /* frame is in RMC, don't forward */ |
2421 | if (ieee80211_is_data(hdr->frame_control) && | |
2422 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2423 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2424 | return RX_DROP_MONITOR; |
2425 | ||
5c90067c | 2426 | if (!ieee80211_is_data(hdr->frame_control)) |
e32f85f7 LCC |
2427 | return RX_CONTINUE; |
2428 | ||
2429 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2430 | return RX_DROP_MONITOR; |
2431 | ||
43b7b314 | 2432 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2433 | struct mesh_path *mppath; |
43b7b314 JC |
2434 | char *proxied_addr; |
2435 | char *mpp_addr; | |
2436 | ||
2437 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2438 | mpp_addr = hdr->addr3; | |
2439 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2440 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2441 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2442 | mpp_addr = hdr->addr4; |
2443 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2444 | } else { |
2445 | return RX_DROP_MONITOR; | |
43b7b314 | 2446 | } |
79617dee | 2447 | |
79617dee | 2448 | rcu_read_lock(); |
bf7cd94d | 2449 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2450 | if (!mppath) { |
bf7cd94d | 2451 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2452 | } else { |
2453 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2454 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2455 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
ab1c7906 | 2456 | mppath->exp_time = jiffies; |
79617dee Y |
2457 | spin_unlock_bh(&mppath->state_lock); |
2458 | } | |
2459 | rcu_read_unlock(); | |
2460 | } | |
2461 | ||
3c5772a5 JC |
2462 | /* Frame has reached destination. Don't forward */ |
2463 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2464 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2465 | return RX_CONTINUE; |
2466 | ||
cf440128 MK |
2467 | ac = ieee80211_select_queue_80211(sdata, skb, hdr); |
2468 | q = sdata->vif.hw_queue[ac]; | |
d3c1597b | 2469 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2470 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2471 | return RX_DROP_MONITOR; |
2472 | } | |
2473 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2474 | |
30789eb6 TP |
2475 | if (!--mesh_hdr->ttl) { |
2476 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2477 | goto out; |
30789eb6 TP |
2478 | } |
2479 | ||
d665508b CYY |
2480 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2481 | goto out; | |
2482 | ||
c38c39bf CI |
2483 | fwd_skb = skb_copy_expand(skb, local->tx_headroom + |
2484 | sdata->encrypt_headroom, 0, GFP_ATOMIC); | |
30789eb6 | 2485 | if (!fwd_skb) { |
bdcbd8e0 | 2486 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2487 | sdata->name); |
30789eb6 TP |
2488 | goto out; |
2489 | } | |
2490 | ||
2491 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2492 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2493 | info = IEEE80211_SKB_CB(fwd_skb); |
2494 | memset(info, 0, sizeof(*info)); | |
2495 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2496 | info->control.vif = &rx->sdata->vif; | |
2497 | info->control.jiffies = jiffies; | |
2498 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2499 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2500 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2501 | /* update power mode indication when forwarding */ |
2502 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2503 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2504 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2505 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2506 | } else { | |
2507 | /* unable to resolve next hop */ | |
bf7cd94d | 2508 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2509 | fwd_hdr->addr3, 0, |
2510 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2511 | fwd_hdr->addr2); | |
30789eb6 | 2512 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2513 | kfree_skb(fwd_skb); |
30789eb6 | 2514 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2515 | } |
2516 | ||
30789eb6 TP |
2517 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2518 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2519 | out: |
df140465 | 2520 | if (is_multicast_ether_addr(hdr->addr1)) |
e32f85f7 | 2521 | return RX_CONTINUE; |
df140465 | 2522 | return RX_DROP_MONITOR; |
e32f85f7 | 2523 | } |
bf94e17b | 2524 | #endif |
e32f85f7 | 2525 | |
49461622 | 2526 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2527 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2528 | { |
eb9fb5b8 | 2529 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2530 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2531 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2532 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2533 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2534 | bool port_control; |
ce3edf6d | 2535 | int err; |
76ee65bf | 2536 | |
358c8d9d | 2537 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2538 | return RX_CONTINUE; |
76ee65bf | 2539 | |
358c8d9d | 2540 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2541 | return RX_DROP_MONITOR; |
76ee65bf | 2542 | |
f14543ee | 2543 | /* |
e7f4a940 JB |
2544 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2545 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2546 | */ |
2547 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2548 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2549 | if (rx->sta && | |
2550 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2551 | cfg80211_rx_unexpected_4addr_frame( | |
2552 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2553 | return RX_DROP_MONITOR; |
e7f4a940 | 2554 | } |
f14543ee | 2555 | |
4114fa21 | 2556 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2557 | if (unlikely(err)) |
e4c26add | 2558 | return RX_DROP_UNUSABLE; |
76ee65bf | 2559 | |
358c8d9d | 2560 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2561 | return RX_DROP_MONITOR; |
ce3edf6d | 2562 | |
8a4d32f3 AN |
2563 | /* directly handle TDLS channel switch requests/responses */ |
2564 | if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == | |
2565 | cpu_to_be16(ETH_P_TDLS))) { | |
2566 | struct ieee80211_tdls_data *tf = (void *)rx->skb->data; | |
2567 | ||
2568 | if (pskb_may_pull(rx->skb, | |
2569 | offsetof(struct ieee80211_tdls_data, u)) && | |
2570 | tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && | |
2571 | tf->category == WLAN_CATEGORY_TDLS && | |
2572 | (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || | |
2573 | tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { | |
c8ff71e6 AN |
2574 | skb_queue_tail(&local->skb_queue_tdls_chsw, rx->skb); |
2575 | schedule_work(&local->tdls_chsw_work); | |
8a4d32f3 | 2576 | if (rx->sta) |
e5a9f8d0 | 2577 | rx->sta->rx_stats.packets++; |
8a4d32f3 AN |
2578 | |
2579 | return RX_QUEUED; | |
2580 | } | |
2581 | } | |
2582 | ||
4114fa21 FF |
2583 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2584 | unlikely(port_control) && sdata->bss) { | |
2585 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2586 | u.ap); | |
2587 | dev = sdata->dev; | |
2588 | rx->sdata = sdata; | |
2589 | } | |
2590 | ||
76ee65bf RR |
2591 | rx->skb->dev = dev; |
2592 | ||
602fae42 JB |
2593 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && |
2594 | local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && | |
8c99f691 RM |
2595 | !is_multicast_ether_addr( |
2596 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2597 | (!local->scanning && | |
602fae42 JB |
2598 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) |
2599 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
2600 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
e15276a4 | 2601 | |
76ee65bf | 2602 | ieee80211_deliver_skb(rx); |
571ecf67 | 2603 | |
9ae54c84 | 2604 | return RX_QUEUED; |
571ecf67 JB |
2605 | } |
2606 | ||
49461622 | 2607 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2608 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2609 | { |
71364716 | 2610 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2611 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2612 | struct tid_ampdu_rx *tid_agg_rx; |
2613 | u16 start_seq_num; | |
2614 | u16 tid; | |
2615 | ||
a7767f95 | 2616 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2617 | return RX_CONTINUE; |
71364716 | 2618 | |
a7767f95 | 2619 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2620 | struct { |
2621 | __le16 control, start_seq_num; | |
2622 | } __packed bar_data; | |
6382246e EG |
2623 | struct ieee80211_event event = { |
2624 | .type = BAR_RX_EVENT, | |
2625 | }; | |
8ae5977f | 2626 | |
71364716 | 2627 | if (!rx->sta) |
a02ae758 | 2628 | return RX_DROP_MONITOR; |
8ae5977f JB |
2629 | |
2630 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2631 | &bar_data, sizeof(bar_data))) | |
2632 | return RX_DROP_MONITOR; | |
2633 | ||
8ae5977f | 2634 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d | 2635 | |
53f24974 JB |
2636 | if (!test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) && |
2637 | !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg)) | |
2638 | ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid, | |
2639 | WLAN_BACK_RECIPIENT, | |
2640 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
2641 | ||
a87f736d JB |
2642 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); |
2643 | if (!tid_agg_rx) | |
a02ae758 | 2644 | return RX_DROP_MONITOR; |
71364716 | 2645 | |
8ae5977f | 2646 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
6382246e EG |
2647 | event.u.ba.tid = tid; |
2648 | event.u.ba.ssn = start_seq_num; | |
2649 | event.u.ba.sta = &rx->sta->sta; | |
71364716 RR |
2650 | |
2651 | /* reset session timer */ | |
20ad19d0 JB |
2652 | if (tid_agg_rx->timeout) |
2653 | mod_timer(&tid_agg_rx->session_timer, | |
2654 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2655 | |
dd318575 | 2656 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2657 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2658 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2659 | start_seq_num, frames); |
dd318575 JB |
2660 | spin_unlock(&tid_agg_rx->reorder_lock); |
2661 | ||
6382246e EG |
2662 | drv_event_callback(rx->local, rx->sdata, &event); |
2663 | ||
a02ae758 JB |
2664 | kfree_skb(skb); |
2665 | return RX_QUEUED; | |
71364716 RR |
2666 | } |
2667 | ||
08daecae JB |
2668 | /* |
2669 | * After this point, we only want management frames, | |
2670 | * so we can drop all remaining control frames to | |
2671 | * cooked monitor interfaces. | |
2672 | */ | |
2673 | return RX_DROP_MONITOR; | |
71364716 RR |
2674 | } |
2675 | ||
f4f727a6 JM |
2676 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2677 | struct ieee80211_mgmt *mgmt, | |
2678 | size_t len) | |
fea14732 JM |
2679 | { |
2680 | struct ieee80211_local *local = sdata->local; | |
2681 | struct sk_buff *skb; | |
2682 | struct ieee80211_mgmt *resp; | |
2683 | ||
b203ca39 | 2684 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2685 | /* Not to own unicast address */ |
2686 | return; | |
2687 | } | |
2688 | ||
b203ca39 JP |
2689 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2690 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2691 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2692 | return; |
2693 | } | |
2694 | ||
2695 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2696 | /* Too short SA Query request frame */ | |
2697 | return; | |
2698 | } | |
2699 | ||
2700 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2701 | if (skb == NULL) | |
2702 | return; | |
2703 | ||
2704 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2705 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2706 | memset(resp, 0, 24); | |
2707 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2708 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2709 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2710 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2711 | IEEE80211_STYPE_ACTION); | |
2712 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2713 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2714 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2715 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2716 | mgmt->u.action.u.sa_query.trans_id, | |
2717 | WLAN_SA_QUERY_TR_ID_LEN); | |
2718 | ||
62ae67be | 2719 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2720 | } |
2721 | ||
2e161f78 JB |
2722 | static ieee80211_rx_result debug_noinline |
2723 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2724 | { | |
2725 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2726 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2727 | |
2728 | /* | |
2729 | * From here on, look only at management frames. | |
2730 | * Data and control frames are already handled, | |
2731 | * and unknown (reserved) frames are useless. | |
2732 | */ | |
2733 | if (rx->skb->len < 24) | |
2734 | return RX_DROP_MONITOR; | |
2735 | ||
2736 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2737 | return RX_DROP_MONITOR; | |
2738 | ||
ee971924 JB |
2739 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2740 | ieee80211_is_beacon(mgmt->frame_control) && | |
2741 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2742 | int sig = 0; |
2743 | ||
30686bf7 | 2744 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
2745 | sig = status->signal; |
2746 | ||
ee971924 JB |
2747 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2748 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2749 | status->freq, sig); |
ee971924 JB |
2750 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2751 | } | |
2752 | ||
2e161f78 JB |
2753 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
2754 | return RX_DROP_UNUSABLE; | |
2755 | ||
2756 | return RX_CONTINUE; | |
2757 | } | |
2758 | ||
de1ede7a JB |
2759 | static ieee80211_rx_result debug_noinline |
2760 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2761 | { | |
2762 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2763 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2764 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2765 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2766 | int len = rx->skb->len; |
2767 | ||
2768 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2769 | return RX_CONTINUE; | |
2770 | ||
026331c4 JM |
2771 | /* drop too small frames */ |
2772 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2773 | return RX_DROP_UNUSABLE; |
de1ede7a | 2774 | |
815b8092 | 2775 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2776 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2777 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2778 | return RX_DROP_UNUSABLE; |
de1ede7a | 2779 | |
de1ede7a | 2780 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2781 | case WLAN_CATEGORY_HT: |
2782 | /* reject HT action frames from stations not supporting HT */ | |
2783 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2784 | goto invalid; | |
2785 | ||
2786 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2787 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2788 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2789 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2790 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2791 | break; | |
2792 | ||
ec61cd63 | 2793 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2794 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2795 | goto invalid; | |
2796 | ||
2797 | switch (mgmt->u.action.u.ht_smps.action) { | |
2798 | case WLAN_HT_ACTION_SMPS: { | |
2799 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2800 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2801 | |
2802 | /* convert to HT capability */ | |
2803 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2804 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2805 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2806 | break; |
2807 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2808 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2809 | break; |
2810 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2811 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2812 | break; |
2813 | default: | |
2814 | goto invalid; | |
2815 | } | |
1d8d3dec JB |
2816 | |
2817 | /* if no change do nothing */ | |
af0ed69b | 2818 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2819 | goto handled; |
af0ed69b | 2820 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2821 | |
2822 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2823 | ||
64f68e5d JB |
2824 | rate_control_rate_update(local, sband, rx->sta, |
2825 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2826 | goto handled; |
2827 | } | |
ec61cd63 JB |
2828 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2829 | struct ieee80211_supported_band *sband; | |
2830 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
1c45c5ce | 2831 | enum ieee80211_sta_rx_bandwidth max_bw, new_bw; |
ec61cd63 JB |
2832 | |
2833 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2834 | if (!(rx->sta->sta.ht_cap.cap & |
2835 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2836 | goto handled; |
2837 | ||
e1a0c6b3 | 2838 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
1c45c5ce | 2839 | max_bw = IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 2840 | else |
1c45c5ce EP |
2841 | max_bw = ieee80211_sta_cap_rx_bw(rx->sta); |
2842 | ||
2843 | /* set cur_max_bandwidth and recalc sta bw */ | |
2844 | rx->sta->cur_max_bandwidth = max_bw; | |
2845 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2846 | |
e1a0c6b3 | 2847 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2848 | goto handled; |
2849 | ||
1c45c5ce | 2850 | rx->sta->sta.bandwidth = new_bw; |
ec61cd63 JB |
2851 | sband = rx->local->hw.wiphy->bands[status->band]; |
2852 | ||
2853 | rate_control_rate_update(local, sband, rx->sta, | |
2854 | IEEE80211_RC_BW_CHANGED); | |
2855 | goto handled; | |
2856 | } | |
1d8d3dec JB |
2857 | default: |
2858 | goto invalid; | |
2859 | } | |
2860 | ||
0af83d3d | 2861 | break; |
1b3a2e49 JB |
2862 | case WLAN_CATEGORY_PUBLIC: |
2863 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2864 | goto invalid; | |
2865 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2866 | break; | |
2867 | if (!rx->sta) | |
2868 | break; | |
2869 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2870 | break; | |
2871 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2872 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2873 | break; | |
2874 | if (len < offsetof(struct ieee80211_mgmt, | |
2875 | u.action.u.ext_chan_switch.variable)) | |
2876 | goto invalid; | |
2877 | goto queue; | |
0af83d3d JB |
2878 | case WLAN_CATEGORY_VHT: |
2879 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2880 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2881 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2882 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2883 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2884 | break; | |
2885 | ||
2886 | /* verify action code is present */ | |
2887 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2888 | goto invalid; | |
2889 | ||
2890 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2891 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
0af83d3d JB |
2892 | /* verify opmode is present */ |
2893 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2894 | goto invalid; | |
d2941df8 | 2895 | goto queue; |
0af83d3d | 2896 | } |
23a1f8d4 SS |
2897 | case WLAN_VHT_ACTION_GROUPID_MGMT: { |
2898 | if (len < IEEE80211_MIN_ACTION_SIZE + 25) | |
2899 | goto invalid; | |
2900 | goto queue; | |
2901 | } | |
0af83d3d JB |
2902 | default: |
2903 | break; | |
2904 | } | |
1d8d3dec | 2905 | break; |
de1ede7a | 2906 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2907 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2908 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2909 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2910 | sdata->vif.type != NL80211_IFTYPE_AP && |
2911 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2912 | break; |
8abd3f9b | 2913 | |
026331c4 JM |
2914 | /* verify action_code is present */ |
2915 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2916 | break; | |
2917 | ||
de1ede7a JB |
2918 | switch (mgmt->u.action.u.addba_req.action_code) { |
2919 | case WLAN_ACTION_ADDBA_REQ: | |
2920 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2921 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2922 | goto invalid; |
2923 | break; | |
de1ede7a JB |
2924 | case WLAN_ACTION_ADDBA_RESP: |
2925 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2926 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2927 | goto invalid; |
2928 | break; | |
de1ede7a JB |
2929 | case WLAN_ACTION_DELBA: |
2930 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2931 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2932 | goto invalid; |
2933 | break; | |
2934 | default: | |
2935 | goto invalid; | |
de1ede7a | 2936 | } |
bed7ee6e | 2937 | |
8b58ff83 | 2938 | goto queue; |
39192c0b | 2939 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2940 | /* verify action_code is present */ |
2941 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2942 | break; | |
2943 | ||
39192c0b JB |
2944 | switch (mgmt->u.action.u.measurement.action_code) { |
2945 | case WLAN_ACTION_SPCT_MSR_REQ: | |
57fbcce3 | 2946 | if (status->band != NL80211_BAND_5GHZ) |
cd7760e6 SW |
2947 | break; |
2948 | ||
39192c0b JB |
2949 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2950 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2951 | break; |
cd7760e6 SW |
2952 | |
2953 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2954 | break; | |
2955 | ||
39192c0b | 2956 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2957 | goto handled; |
cd7760e6 SW |
2958 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2959 | u8 *bssid; | |
2960 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2961 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2962 | break; |
cc32abd4 | 2963 | |
cd7760e6 | 2964 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2965 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2966 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2967 | break; |
2968 | ||
2969 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2970 | bssid = sdata->u.mgd.bssid; | |
2971 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2972 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2973 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2974 | bssid = mgmt->sa; | |
cd7760e6 SW |
2975 | else |
2976 | break; | |
2977 | ||
2978 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2979 | break; |
c481ec97 | 2980 | |
8b58ff83 | 2981 | goto queue; |
cd7760e6 | 2982 | } |
39192c0b JB |
2983 | } |
2984 | break; | |
fea14732 JM |
2985 | case WLAN_CATEGORY_SA_QUERY: |
2986 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2987 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2988 | break; |
2989 | ||
fea14732 JM |
2990 | switch (mgmt->u.action.u.sa_query.action) { |
2991 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2992 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2993 | break; |
fea14732 | 2994 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2995 | goto handled; |
fea14732 JM |
2996 | } |
2997 | break; | |
8db09850 | 2998 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2999 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
3000 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
3001 | break; | |
3002 | ||
8db09850 TP |
3003 | switch (mgmt->u.action.u.self_prot.action_code) { |
3004 | case WLAN_SP_MESH_PEERING_OPEN: | |
3005 | case WLAN_SP_MESH_PEERING_CLOSE: | |
3006 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
3007 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
3008 | goto invalid; | |
a6dad6a2 | 3009 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
3010 | /* userspace handles this frame */ |
3011 | break; | |
3012 | goto queue; | |
3013 | case WLAN_SP_MGK_INFORM: | |
3014 | case WLAN_SP_MGK_ACK: | |
3015 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
3016 | goto invalid; | |
3017 | break; | |
3018 | } | |
3019 | break; | |
d3aaec8a | 3020 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
3021 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
3022 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
3023 | break; | |
3024 | ||
77a121c3 JB |
3025 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
3026 | break; | |
25d49e4d | 3027 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 3028 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
3029 | break; |
3030 | goto queue; | |
84040805 | 3031 | } |
026331c4 | 3032 | |
2e161f78 JB |
3033 | return RX_CONTINUE; |
3034 | ||
bed7ee6e | 3035 | invalid: |
554891e6 | 3036 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
3037 | /* will return in the next handlers */ |
3038 | return RX_CONTINUE; | |
3039 | ||
3040 | handled: | |
3041 | if (rx->sta) | |
e5a9f8d0 | 3042 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
3043 | dev_kfree_skb(rx->skb); |
3044 | return RX_QUEUED; | |
3045 | ||
3046 | queue: | |
3047 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
3048 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
3049 | ieee80211_queue_work(&local->hw, &sdata->work); | |
3050 | if (rx->sta) | |
e5a9f8d0 | 3051 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
3052 | return RX_QUEUED; |
3053 | } | |
3054 | ||
3055 | static ieee80211_rx_result debug_noinline | |
3056 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
3057 | { | |
554891e6 | 3058 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 3059 | int sig = 0; |
2e161f78 JB |
3060 | |
3061 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 3062 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 3063 | return RX_CONTINUE; |
d7907448 | 3064 | |
026331c4 JM |
3065 | /* |
3066 | * Getting here means the kernel doesn't know how to handle | |
3067 | * it, but maybe userspace does ... include returned frames | |
3068 | * so userspace can register for those to know whether ones | |
3069 | * it transmitted were processed or returned. | |
3070 | */ | |
026331c4 | 3071 | |
30686bf7 | 3072 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
3073 | sig = status->signal; |
3074 | ||
71bbc994 | 3075 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 3076 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 | 3077 | if (rx->sta) |
e5a9f8d0 | 3078 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
3079 | dev_kfree_skb(rx->skb); |
3080 | return RX_QUEUED; | |
3081 | } | |
3082 | ||
2e161f78 JB |
3083 | return RX_CONTINUE; |
3084 | } | |
3085 | ||
3086 | static ieee80211_rx_result debug_noinline | |
3087 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
3088 | { | |
3089 | struct ieee80211_local *local = rx->local; | |
3090 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
3091 | struct sk_buff *nskb; | |
3092 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 3093 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
3094 | |
3095 | if (!ieee80211_is_action(mgmt->frame_control)) | |
3096 | return RX_CONTINUE; | |
3097 | ||
3098 | /* | |
3099 | * For AP mode, hostapd is responsible for handling any action | |
3100 | * frames that we didn't handle, including returning unknown | |
3101 | * ones. For all other modes we will return them to the sender, | |
3102 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 3103 | * 802.11-2012 9.24.4. |
2e161f78 JB |
3104 | * Newer versions of hostapd shall also use the management frame |
3105 | * registration mechanisms, but older ones still use cooked | |
3106 | * monitor interfaces so push all frames there. | |
3107 | */ | |
554891e6 | 3108 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
3109 | (sdata->vif.type == NL80211_IFTYPE_AP || |
3110 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
3111 | return RX_DROP_MONITOR; | |
026331c4 | 3112 | |
4b5ebccc JB |
3113 | if (is_multicast_ether_addr(mgmt->da)) |
3114 | return RX_DROP_MONITOR; | |
3115 | ||
84040805 JB |
3116 | /* do not return rejected action frames */ |
3117 | if (mgmt->u.action.category & 0x80) | |
3118 | return RX_DROP_UNUSABLE; | |
3119 | ||
3120 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
3121 | GFP_ATOMIC); | |
3122 | if (nskb) { | |
292b4df6 | 3123 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 3124 | |
292b4df6 JL |
3125 | nmgmt->u.action.category |= 0x80; |
3126 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
3127 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
3128 | |
3129 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
3130 | ||
07e5a5f5 JB |
3131 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
3132 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
3133 | ||
3134 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
3135 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
3136 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
30686bf7 | 3137 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
07e5a5f5 JB |
3138 | info->hw_queue = |
3139 | local->hw.offchannel_tx_hw_queue; | |
3140 | } | |
3141 | ||
3142 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
3143 | status->band); | |
de1ede7a | 3144 | } |
39192c0b JB |
3145 | dev_kfree_skb(rx->skb); |
3146 | return RX_QUEUED; | |
de1ede7a JB |
3147 | } |
3148 | ||
49461622 | 3149 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 3150 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 3151 | { |
eb9fb5b8 | 3152 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
3153 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
3154 | __le16 stype; | |
571ecf67 | 3155 | |
77a121c3 | 3156 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 3157 | |
77a121c3 JB |
3158 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
3159 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 3160 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
3161 | sdata->vif.type != NL80211_IFTYPE_STATION) |
3162 | return RX_DROP_MONITOR; | |
472dbc45 | 3163 | |
77a121c3 | 3164 | switch (stype) { |
66e67e41 | 3165 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
3166 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
3167 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
3168 | /* process for all: mesh, mlme, ibss */ | |
3169 | break; | |
66e67e41 JB |
3170 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
3171 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
3172 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
3173 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
3174 | if (is_multicast_ether_addr(mgmt->da) && |
3175 | !is_broadcast_ether_addr(mgmt->da)) | |
3176 | return RX_DROP_MONITOR; | |
3177 | ||
77a121c3 JB |
3178 | /* process only for station */ |
3179 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
3180 | return RX_DROP_MONITOR; | |
3181 | break; | |
3182 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
3183 | /* process only for ibss and mesh */ |
3184 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
3185 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
3186 | return RX_DROP_MONITOR; |
3187 | break; | |
3188 | default: | |
3189 | return RX_DROP_MONITOR; | |
3190 | } | |
f9d540ee | 3191 | |
77a121c3 | 3192 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 3193 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
3194 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
3195 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 | 3196 | if (rx->sta) |
e5a9f8d0 | 3197 | rx->sta->rx_stats.packets++; |
46900298 | 3198 | |
77a121c3 | 3199 | return RX_QUEUED; |
571ecf67 JB |
3200 | } |
3201 | ||
5f0b7de5 JB |
3202 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
3203 | struct ieee80211_rate *rate) | |
3d30d949 MW |
3204 | { |
3205 | struct ieee80211_sub_if_data *sdata; | |
3206 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
3207 | struct sk_buff *skb = rx->skb, *skb2; |
3208 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 3209 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 3210 | int needed_headroom; |
3d30d949 | 3211 | |
554891e6 JB |
3212 | /* |
3213 | * If cooked monitor has been processed already, then | |
3214 | * don't do it again. If not, set the flag. | |
3215 | */ | |
3216 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 3217 | goto out_free_skb; |
554891e6 | 3218 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 3219 | |
152c477a JB |
3220 | /* If there are no cooked monitor interfaces, just free the SKB */ |
3221 | if (!local->cooked_mntrs) | |
3222 | goto out_free_skb; | |
3223 | ||
1f7bba79 JB |
3224 | /* vendor data is long removed here */ |
3225 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 3226 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 3227 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 3228 | |
293702a3 JB |
3229 | if (skb_headroom(skb) < needed_headroom && |
3230 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
3231 | goto out_free_skb; | |
3d30d949 | 3232 | |
293702a3 | 3233 | /* prepend radiotap information */ |
973ef21a FF |
3234 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
3235 | false); | |
3d30d949 | 3236 | |
d57a544d | 3237 | skb_reset_mac_header(skb); |
3d30d949 MW |
3238 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
3239 | skb->pkt_type = PACKET_OTHERHOST; | |
3240 | skb->protocol = htons(ETH_P_802_2); | |
3241 | ||
3242 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 3243 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
3244 | continue; |
3245 | ||
05c914fe | 3246 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
d8212184 | 3247 | !(sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)) |
3d30d949 MW |
3248 | continue; |
3249 | ||
3250 | if (prev_dev) { | |
3251 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3252 | if (skb2) { | |
3253 | skb2->dev = prev_dev; | |
5548a8a1 | 3254 | netif_receive_skb(skb2); |
3d30d949 MW |
3255 | } |
3256 | } | |
3257 | ||
3258 | prev_dev = sdata->dev; | |
5a490510 | 3259 | ieee80211_rx_stats(sdata->dev, skb->len); |
3d30d949 MW |
3260 | } |
3261 | ||
3262 | if (prev_dev) { | |
3263 | skb->dev = prev_dev; | |
5548a8a1 | 3264 | netif_receive_skb(skb); |
554891e6 JB |
3265 | return; |
3266 | } | |
3d30d949 MW |
3267 | |
3268 | out_free_skb: | |
3269 | dev_kfree_skb(skb); | |
3270 | } | |
3271 | ||
aa0c8636 CL |
3272 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3273 | ieee80211_rx_result res) | |
3274 | { | |
3275 | switch (res) { | |
3276 | case RX_DROP_MONITOR: | |
3277 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3278 | if (rx->sta) | |
e5a9f8d0 | 3279 | rx->sta->rx_stats.dropped++; |
aa0c8636 CL |
3280 | /* fall through */ |
3281 | case RX_CONTINUE: { | |
3282 | struct ieee80211_rate *rate = NULL; | |
3283 | struct ieee80211_supported_band *sband; | |
3284 | struct ieee80211_rx_status *status; | |
3285 | ||
3286 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3287 | ||
3288 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3289 | if (!(status->flag & RX_FLAG_HT) && |
3290 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3291 | rate = &sband->bitrates[status->rate_idx]; |
3292 | ||
3293 | ieee80211_rx_cooked_monitor(rx, rate); | |
3294 | break; | |
3295 | } | |
3296 | case RX_DROP_UNUSABLE: | |
3297 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3298 | if (rx->sta) | |
e5a9f8d0 | 3299 | rx->sta->rx_stats.dropped++; |
aa0c8636 CL |
3300 | dev_kfree_skb(rx->skb); |
3301 | break; | |
3302 | case RX_QUEUED: | |
3303 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3304 | break; | |
3305 | } | |
3306 | } | |
571ecf67 | 3307 | |
f9e124fb CL |
3308 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3309 | struct sk_buff_head *frames) | |
58905290 | 3310 | { |
58905290 | 3311 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3312 | struct sk_buff *skb; |
8944b79f | 3313 | |
e32f85f7 LCC |
3314 | #define CALL_RXH(rxh) \ |
3315 | do { \ | |
3316 | res = rxh(rx); \ | |
3317 | if (res != RX_CONTINUE) \ | |
2569a826 | 3318 | goto rxh_next; \ |
8ebaa5b0 | 3319 | } while (0) |
49461622 | 3320 | |
45ceeee8 JB |
3321 | /* Lock here to avoid hitting all of the data used in the RX |
3322 | * path (e.g. key data, station data, ...) concurrently when | |
3323 | * a frame is released from the reorder buffer due to timeout | |
3324 | * from the timer, potentially concurrently with RX from the | |
3325 | * driver. | |
3326 | */ | |
f9e124fb | 3327 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3328 | |
f9e124fb | 3329 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3330 | /* |
3331 | * all the other fields are valid across frames | |
3332 | * that belong to an aMPDU since they are on the | |
3333 | * same TID from the same station | |
3334 | */ | |
3335 | rx->skb = skb; | |
3336 | ||
8ebaa5b0 JB |
3337 | CALL_RXH(ieee80211_rx_h_check_more_data); |
3338 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll); | |
3339 | CALL_RXH(ieee80211_rx_h_sta_process); | |
3340 | CALL_RXH(ieee80211_rx_h_decrypt); | |
3341 | CALL_RXH(ieee80211_rx_h_defragment); | |
3342 | CALL_RXH(ieee80211_rx_h_michael_mic_verify); | |
2569a826 | 3343 | /* must be after MMIC verify so header is counted in MPDU mic */ |
bf94e17b | 3344 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3345 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3346 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3347 | #endif |
8ebaa5b0 JB |
3348 | CALL_RXH(ieee80211_rx_h_amsdu); |
3349 | CALL_RXH(ieee80211_rx_h_data); | |
f9e124fb CL |
3350 | |
3351 | /* special treatment -- needs the queue */ | |
3352 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3353 | if (res != RX_CONTINUE) | |
3354 | goto rxh_next; | |
3355 | ||
8ebaa5b0 JB |
3356 | CALL_RXH(ieee80211_rx_h_mgmt_check); |
3357 | CALL_RXH(ieee80211_rx_h_action); | |
3358 | CALL_RXH(ieee80211_rx_h_userspace_mgmt); | |
3359 | CALL_RXH(ieee80211_rx_h_action_return); | |
3360 | CALL_RXH(ieee80211_rx_h_mgmt); | |
49461622 | 3361 | |
aa0c8636 CL |
3362 | rxh_next: |
3363 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3364 | |
49461622 | 3365 | #undef CALL_RXH |
aa0c8636 | 3366 | } |
24a8fdad | 3367 | |
f9e124fb | 3368 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3369 | } |
3370 | ||
4406c376 | 3371 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3372 | { |
f9e124fb | 3373 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3374 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3375 | ||
f9e124fb CL |
3376 | __skb_queue_head_init(&reorder_release); |
3377 | ||
aa0c8636 CL |
3378 | #define CALL_RXH(rxh) \ |
3379 | do { \ | |
3380 | res = rxh(rx); \ | |
3381 | if (res != RX_CONTINUE) \ | |
3382 | goto rxh_next; \ | |
8ebaa5b0 | 3383 | } while (0) |
aa0c8636 | 3384 | |
8ebaa5b0 JB |
3385 | CALL_RXH(ieee80211_rx_h_check_dup); |
3386 | CALL_RXH(ieee80211_rx_h_check); | |
aa0c8636 | 3387 | |
f9e124fb | 3388 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3389 | |
f9e124fb | 3390 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3391 | return; |
49461622 | 3392 | |
2569a826 | 3393 | rxh_next: |
aa0c8636 CL |
3394 | ieee80211_rx_handlers_result(rx, res); |
3395 | ||
3396 | #undef CALL_RXH | |
58905290 JB |
3397 | } |
3398 | ||
2bff8ebf | 3399 | /* |
dd318575 JB |
3400 | * This function makes calls into the RX path, therefore |
3401 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3402 | */ |
3403 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3404 | { | |
f9e124fb | 3405 | struct sk_buff_head frames; |
554891e6 JB |
3406 | struct ieee80211_rx_data rx = { |
3407 | .sta = sta, | |
3408 | .sdata = sta->sdata, | |
3409 | .local = sta->local, | |
9e26297a JB |
3410 | /* This is OK -- must be QoS data frame */ |
3411 | .security_idx = tid, | |
3412 | .seqno_idx = tid, | |
af9f9b22 | 3413 | .napi = NULL, /* must be NULL to not have races */ |
554891e6 | 3414 | }; |
2c15a0cf CL |
3415 | struct tid_ampdu_rx *tid_agg_rx; |
3416 | ||
3417 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3418 | if (!tid_agg_rx) | |
3419 | return; | |
2bff8ebf | 3420 | |
f9e124fb CL |
3421 | __skb_queue_head_init(&frames); |
3422 | ||
2c15a0cf | 3423 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3424 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3425 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3426 | |
b497de63 EG |
3427 | if (!skb_queue_empty(&frames)) { |
3428 | struct ieee80211_event event = { | |
3429 | .type = BA_FRAME_TIMEOUT, | |
3430 | .u.ba.tid = tid, | |
3431 | .u.ba.sta = &sta->sta, | |
3432 | }; | |
3433 | drv_event_callback(rx.local, rx.sdata, &event); | |
3434 | } | |
3435 | ||
f9e124fb | 3436 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3437 | } |
3438 | ||
06470f74 SS |
3439 | void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, |
3440 | u16 ssn, u64 filtered, | |
3441 | u16 received_mpdus) | |
3442 | { | |
3443 | struct sta_info *sta; | |
3444 | struct tid_ampdu_rx *tid_agg_rx; | |
3445 | struct sk_buff_head frames; | |
3446 | struct ieee80211_rx_data rx = { | |
3447 | /* This is OK -- must be QoS data frame */ | |
3448 | .security_idx = tid, | |
3449 | .seqno_idx = tid, | |
3450 | }; | |
3451 | int i, diff; | |
3452 | ||
3453 | if (WARN_ON(!pubsta || tid >= IEEE80211_NUM_TIDS)) | |
3454 | return; | |
3455 | ||
3456 | __skb_queue_head_init(&frames); | |
3457 | ||
3458 | sta = container_of(pubsta, struct sta_info, sta); | |
3459 | ||
3460 | rx.sta = sta; | |
3461 | rx.sdata = sta->sdata; | |
3462 | rx.local = sta->local; | |
3463 | ||
3464 | rcu_read_lock(); | |
3465 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3466 | if (!tid_agg_rx) | |
3467 | goto out; | |
3468 | ||
3469 | spin_lock_bh(&tid_agg_rx->reorder_lock); | |
3470 | ||
3471 | if (received_mpdus >= IEEE80211_SN_MODULO >> 1) { | |
3472 | int release; | |
3473 | ||
3474 | /* release all frames in the reorder buffer */ | |
3475 | release = (tid_agg_rx->head_seq_num + tid_agg_rx->buf_size) % | |
3476 | IEEE80211_SN_MODULO; | |
3477 | ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, | |
3478 | release, &frames); | |
3479 | /* update ssn to match received ssn */ | |
3480 | tid_agg_rx->head_seq_num = ssn; | |
3481 | } else { | |
3482 | ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, ssn, | |
3483 | &frames); | |
3484 | } | |
3485 | ||
3486 | /* handle the case that received ssn is behind the mac ssn. | |
3487 | * it can be tid_agg_rx->buf_size behind and still be valid */ | |
3488 | diff = (tid_agg_rx->head_seq_num - ssn) & IEEE80211_SN_MASK; | |
3489 | if (diff >= tid_agg_rx->buf_size) { | |
3490 | tid_agg_rx->reorder_buf_filtered = 0; | |
3491 | goto release; | |
3492 | } | |
3493 | filtered = filtered >> diff; | |
3494 | ssn += diff; | |
3495 | ||
3496 | /* update bitmap */ | |
3497 | for (i = 0; i < tid_agg_rx->buf_size; i++) { | |
3498 | int index = (ssn + i) % tid_agg_rx->buf_size; | |
3499 | ||
3500 | tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index); | |
3501 | if (filtered & BIT_ULL(i)) | |
3502 | tid_agg_rx->reorder_buf_filtered |= BIT_ULL(index); | |
3503 | } | |
3504 | ||
3505 | /* now process also frames that the filter marking released */ | |
3506 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); | |
3507 | ||
3508 | release: | |
3509 | spin_unlock_bh(&tid_agg_rx->reorder_lock); | |
3510 | ||
3511 | ieee80211_rx_handlers(&rx, &frames); | |
3512 | ||
3513 | out: | |
3514 | rcu_read_unlock(); | |
3515 | } | |
3516 | EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames); | |
3517 | ||
571ecf67 JB |
3518 | /* main receive path */ |
3519 | ||
a58fbe1a | 3520 | static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) |
23a24def | 3521 | { |
20b01f80 | 3522 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 | 3523 | struct sk_buff *skb = rx->skb; |
a58fbe1a | 3524 | struct ieee80211_hdr *hdr = (void *)skb->data; |
eb9fb5b8 JB |
3525 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
3526 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3527 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3528 | ||
51fb61e7 | 3529 | switch (sdata->vif.type) { |
05c914fe | 3530 | case NL80211_IFTYPE_STATION: |
9bc383de | 3531 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3532 | return false; |
a58fbe1a JB |
3533 | if (multicast) |
3534 | return true; | |
3535 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe | 3536 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3537 | if (!bssid) |
3c2723f5 | 3538 | return false; |
6329b8d9 FF |
3539 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3540 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3541 | return false; |
a58fbe1a | 3542 | if (ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3543 | return true; |
a58fbe1a | 3544 | if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) |
3c2723f5 | 3545 | return false; |
a58fbe1a JB |
3546 | if (!multicast && |
3547 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
df140465 | 3548 | return false; |
a58fbe1a | 3549 | if (!rx->sta) { |
0fb8ca45 | 3550 | int rate_idx; |
5614618e JB |
3551 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3552 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3553 | else |
eb9fb5b8 | 3554 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3555 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3556 | BIT(rate_idx)); | |
0fb8ca45 | 3557 | } |
a58fbe1a | 3558 | return true; |
239281f8 RL |
3559 | case NL80211_IFTYPE_OCB: |
3560 | if (!bssid) | |
3561 | return false; | |
cc117298 | 3562 | if (!ieee80211_is_data_present(hdr->frame_control)) |
239281f8 | 3563 | return false; |
a58fbe1a | 3564 | if (!is_broadcast_ether_addr(bssid)) |
239281f8 | 3565 | return false; |
a58fbe1a JB |
3566 | if (!multicast && |
3567 | !ether_addr_equal(sdata->dev->dev_addr, hdr->addr1)) | |
df140465 | 3568 | return false; |
a58fbe1a | 3569 | if (!rx->sta) { |
239281f8 RL |
3570 | int rate_idx; |
3571 | if (status->flag & RX_FLAG_HT) | |
3572 | rate_idx = 0; /* TODO: HT rates */ | |
3573 | else | |
3574 | rate_idx = status->rate_idx; | |
3575 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3576 | BIT(rate_idx)); | |
3577 | } | |
a58fbe1a | 3578 | return true; |
05c914fe | 3579 | case NL80211_IFTYPE_MESH_POINT: |
a58fbe1a JB |
3580 | if (multicast) |
3581 | return true; | |
3582 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe JB |
3583 | case NL80211_IFTYPE_AP_VLAN: |
3584 | case NL80211_IFTYPE_AP: | |
a58fbe1a JB |
3585 | if (!bssid) |
3586 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
3587 | ||
3588 | if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { | |
3df6eaea JB |
3589 | /* |
3590 | * Accept public action frames even when the | |
3591 | * BSSID doesn't match, this is used for P2P | |
3592 | * and location updates. Note that mac80211 | |
3593 | * itself never looks at these frames. | |
3594 | */ | |
2b9ccd4e JB |
3595 | if (!multicast && |
3596 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3597 | return false; |
d48b2968 | 3598 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3599 | return true; |
5c90067c | 3600 | return ieee80211_is_beacon(hdr->frame_control); |
a58fbe1a JB |
3601 | } |
3602 | ||
3603 | if (!ieee80211_has_tods(hdr->frame_control)) { | |
db8e1732 AN |
3604 | /* ignore data frames to TDLS-peers */ |
3605 | if (ieee80211_is_data(hdr->frame_control)) | |
3606 | return false; | |
3607 | /* ignore action frames to TDLS-peers */ | |
3608 | if (ieee80211_is_action(hdr->frame_control) && | |
1ec7bae8 | 3609 | !is_broadcast_ether_addr(bssid) && |
db8e1732 AN |
3610 | !ether_addr_equal(bssid, hdr->addr1)) |
3611 | return false; | |
23a24def | 3612 | } |
a58fbe1a | 3613 | return true; |
05c914fe | 3614 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3615 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3616 | return false; |
a58fbe1a | 3617 | return ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2); |
f142c6b9 | 3618 | case NL80211_IFTYPE_P2P_DEVICE: |
a58fbe1a JB |
3619 | return ieee80211_is_public_action(hdr, skb->len) || |
3620 | ieee80211_is_probe_req(hdr->frame_control) || | |
3621 | ieee80211_is_probe_resp(hdr->frame_control) || | |
3622 | ieee80211_is_beacon(hdr->frame_control); | |
cb3b7d87 AB |
3623 | case NL80211_IFTYPE_NAN: |
3624 | /* Currently no frames on NAN interface are allowed */ | |
3625 | return false; | |
2ca27bcf | 3626 | default: |
fb1c1cd6 | 3627 | break; |
23a24def JB |
3628 | } |
3629 | ||
a58fbe1a JB |
3630 | WARN_ON_ONCE(1); |
3631 | return false; | |
23a24def JB |
3632 | } |
3633 | ||
49ddf8e6 JB |
3634 | void ieee80211_check_fast_rx(struct sta_info *sta) |
3635 | { | |
3636 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3637 | struct ieee80211_local *local = sdata->local; | |
3638 | struct ieee80211_key *key; | |
3639 | struct ieee80211_fast_rx fastrx = { | |
3640 | .dev = sdata->dev, | |
3641 | .vif_type = sdata->vif.type, | |
3642 | .control_port_protocol = sdata->control_port_protocol, | |
3643 | }, *old, *new = NULL; | |
3644 | bool assign = false; | |
3645 | ||
3646 | /* use sparse to check that we don't return without updating */ | |
3647 | __acquire(check_fast_rx); | |
3648 | ||
3649 | BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != sizeof(rfc1042_header)); | |
3650 | BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != ETH_ALEN); | |
3651 | ether_addr_copy(fastrx.rfc1042_hdr, rfc1042_header); | |
3652 | ether_addr_copy(fastrx.vif_addr, sdata->vif.addr); | |
3653 | ||
c9c5962b JB |
3654 | fastrx.uses_rss = ieee80211_hw_check(&local->hw, USES_RSS); |
3655 | ||
49ddf8e6 JB |
3656 | /* fast-rx doesn't do reordering */ |
3657 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && | |
3658 | !ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER)) | |
3659 | goto clear; | |
3660 | ||
3661 | switch (sdata->vif.type) { | |
3662 | case NL80211_IFTYPE_STATION: | |
3663 | /* 4-addr is harder to deal with, later maybe */ | |
3664 | if (sdata->u.mgd.use_4addr) | |
3665 | goto clear; | |
3666 | /* software powersave is a huge mess, avoid all of it */ | |
3667 | if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) | |
3668 | goto clear; | |
3669 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && | |
3670 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) | |
3671 | goto clear; | |
3672 | if (sta->sta.tdls) { | |
3673 | fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
3674 | fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
3675 | fastrx.expected_ds_bits = 0; | |
3676 | } else { | |
3677 | fastrx.sta_notify = sdata->u.mgd.probe_send_count > 0; | |
3678 | fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
3679 | fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
3680 | fastrx.expected_ds_bits = | |
3681 | cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
3682 | } | |
3683 | break; | |
3684 | case NL80211_IFTYPE_AP_VLAN: | |
3685 | case NL80211_IFTYPE_AP: | |
3686 | /* parallel-rx requires this, at least with calls to | |
3687 | * ieee80211_sta_ps_transition() | |
3688 | */ | |
3689 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) | |
3690 | goto clear; | |
3691 | fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
3692 | fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
3693 | fastrx.expected_ds_bits = cpu_to_le16(IEEE80211_FCTL_TODS); | |
3694 | ||
3695 | fastrx.internal_forward = | |
3696 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && | |
3697 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || | |
3698 | !sdata->u.vlan.sta); | |
3699 | break; | |
3700 | default: | |
3701 | goto clear; | |
3702 | } | |
3703 | ||
3704 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
3705 | goto clear; | |
3706 | ||
3707 | rcu_read_lock(); | |
3708 | key = rcu_dereference(sta->ptk[sta->ptk_idx]); | |
3709 | if (key) { | |
3710 | switch (key->conf.cipher) { | |
3711 | case WLAN_CIPHER_SUITE_TKIP: | |
3712 | /* we don't want to deal with MMIC in fast-rx */ | |
3713 | goto clear_rcu; | |
3714 | case WLAN_CIPHER_SUITE_CCMP: | |
3715 | case WLAN_CIPHER_SUITE_CCMP_256: | |
3716 | case WLAN_CIPHER_SUITE_GCMP: | |
3717 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3718 | break; | |
3719 | default: | |
3720 | /* we also don't want to deal with WEP or cipher scheme | |
3721 | * since those require looking up the key idx in the | |
3722 | * frame, rather than assuming the PTK is used | |
3723 | * (we need to revisit this once we implement the real | |
3724 | * PTK index, which is now valid in the spec, but we | |
3725 | * haven't implemented that part yet) | |
3726 | */ | |
3727 | goto clear_rcu; | |
3728 | } | |
3729 | ||
3730 | fastrx.key = true; | |
3731 | fastrx.icv_len = key->conf.icv_len; | |
3732 | } | |
3733 | ||
3734 | assign = true; | |
3735 | clear_rcu: | |
3736 | rcu_read_unlock(); | |
3737 | clear: | |
3738 | __release(check_fast_rx); | |
3739 | ||
3740 | if (assign) | |
3741 | new = kmemdup(&fastrx, sizeof(fastrx), GFP_KERNEL); | |
3742 | ||
3743 | spin_lock_bh(&sta->lock); | |
3744 | old = rcu_dereference_protected(sta->fast_rx, true); | |
3745 | rcu_assign_pointer(sta->fast_rx, new); | |
3746 | spin_unlock_bh(&sta->lock); | |
3747 | ||
3748 | if (old) | |
3749 | kfree_rcu(old, rcu_head); | |
3750 | } | |
3751 | ||
3752 | void ieee80211_clear_fast_rx(struct sta_info *sta) | |
3753 | { | |
3754 | struct ieee80211_fast_rx *old; | |
3755 | ||
3756 | spin_lock_bh(&sta->lock); | |
3757 | old = rcu_dereference_protected(sta->fast_rx, true); | |
3758 | RCU_INIT_POINTER(sta->fast_rx, NULL); | |
3759 | spin_unlock_bh(&sta->lock); | |
3760 | ||
3761 | if (old) | |
3762 | kfree_rcu(old, rcu_head); | |
3763 | } | |
3764 | ||
3765 | void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata) | |
3766 | { | |
3767 | struct ieee80211_local *local = sdata->local; | |
3768 | struct sta_info *sta; | |
3769 | ||
3770 | lockdep_assert_held(&local->sta_mtx); | |
3771 | ||
3772 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3773 | if (sdata != sta->sdata && | |
3774 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
3775 | continue; | |
3776 | ieee80211_check_fast_rx(sta); | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata) | |
3781 | { | |
3782 | struct ieee80211_local *local = sdata->local; | |
3783 | ||
3784 | mutex_lock(&local->sta_mtx); | |
3785 | __ieee80211_check_fast_rx_iface(sdata); | |
3786 | mutex_unlock(&local->sta_mtx); | |
3787 | } | |
3788 | ||
3789 | static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx, | |
3790 | struct ieee80211_fast_rx *fast_rx) | |
3791 | { | |
3792 | struct sk_buff *skb = rx->skb; | |
3793 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3794 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3795 | struct sta_info *sta = rx->sta; | |
3796 | int orig_len = skb->len; | |
3797 | int snap_offs = ieee80211_hdrlen(hdr->frame_control); | |
3798 | struct { | |
3799 | u8 snap[sizeof(rfc1042_header)]; | |
3800 | __be16 proto; | |
3801 | } *payload __aligned(2); | |
3802 | struct { | |
3803 | u8 da[ETH_ALEN]; | |
3804 | u8 sa[ETH_ALEN]; | |
3805 | } addrs __aligned(2); | |
c9c5962b JB |
3806 | struct ieee80211_sta_rx_stats *stats = &sta->rx_stats; |
3807 | ||
3808 | if (fast_rx->uses_rss) | |
3809 | stats = this_cpu_ptr(sta->pcpu_rx_stats); | |
49ddf8e6 JB |
3810 | |
3811 | /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write | |
3812 | * to a common data structure; drivers can implement that per queue | |
3813 | * but we don't have that information in mac80211 | |
3814 | */ | |
3815 | if (!(status->flag & RX_FLAG_DUP_VALIDATED)) | |
3816 | return false; | |
3817 | ||
3818 | #define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED) | |
3819 | ||
3820 | /* If using encryption, we also need to have: | |
3821 | * - PN_VALIDATED: similar, but the implementation is tricky | |
3822 | * - DECRYPTED: necessary for PN_VALIDATED | |
3823 | */ | |
3824 | if (fast_rx->key && | |
3825 | (status->flag & FAST_RX_CRYPT_FLAGS) != FAST_RX_CRYPT_FLAGS) | |
3826 | return false; | |
3827 | ||
3828 | /* we don't deal with A-MSDU deaggregation here */ | |
3829 | if (status->rx_flags & IEEE80211_RX_AMSDU) | |
3830 | return false; | |
3831 | ||
3832 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
3833 | return false; | |
3834 | ||
3835 | if (unlikely(ieee80211_is_frag(hdr))) | |
3836 | return false; | |
3837 | ||
3838 | /* Since our interface address cannot be multicast, this | |
3839 | * implicitly also rejects multicast frames without the | |
3840 | * explicit check. | |
3841 | * | |
3842 | * We shouldn't get any *data* frames not addressed to us | |
3843 | * (AP mode will accept multicast *management* frames), but | |
3844 | * punting here will make it go through the full checks in | |
3845 | * ieee80211_accept_frame(). | |
3846 | */ | |
3847 | if (!ether_addr_equal(fast_rx->vif_addr, hdr->addr1)) | |
3848 | return false; | |
3849 | ||
3850 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
3851 | IEEE80211_FCTL_TODS)) != | |
3852 | fast_rx->expected_ds_bits) | |
3853 | goto drop; | |
3854 | ||
3855 | /* assign the key to drop unencrypted frames (later) | |
3856 | * and strip the IV/MIC if necessary | |
3857 | */ | |
3858 | if (fast_rx->key && !(status->flag & RX_FLAG_IV_STRIPPED)) { | |
3859 | /* GCMP header length is the same */ | |
3860 | snap_offs += IEEE80211_CCMP_HDR_LEN; | |
3861 | } | |
3862 | ||
3863 | if (!pskb_may_pull(skb, snap_offs + sizeof(*payload))) | |
3864 | goto drop; | |
3865 | payload = (void *)(skb->data + snap_offs); | |
3866 | ||
3867 | if (!ether_addr_equal(payload->snap, fast_rx->rfc1042_hdr)) | |
3868 | return false; | |
3869 | ||
3870 | /* Don't handle these here since they require special code. | |
3871 | * Accept AARP and IPX even though they should come with a | |
3872 | * bridge-tunnel header - but if we get them this way then | |
3873 | * there's little point in discarding them. | |
3874 | */ | |
3875 | if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) || | |
3876 | payload->proto == fast_rx->control_port_protocol)) | |
3877 | return false; | |
3878 | ||
3879 | /* after this point, don't punt to the slowpath! */ | |
3880 | ||
3881 | if (rx->key && !(status->flag & RX_FLAG_MIC_STRIPPED) && | |
3882 | pskb_trim(skb, skb->len - fast_rx->icv_len)) | |
3883 | goto drop; | |
3884 | ||
3885 | if (unlikely(fast_rx->sta_notify)) { | |
3886 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
3887 | fast_rx->sta_notify = false; | |
3888 | } | |
3889 | ||
3890 | /* statistics part of ieee80211_rx_h_sta_process() */ | |
c9c5962b JB |
3891 | stats->last_rx = jiffies; |
3892 | stats->last_rate = sta_stats_encode_rate(status); | |
49ddf8e6 | 3893 | |
c9c5962b | 3894 | stats->fragments++; |
0328edc7 | 3895 | stats->packets++; |
49ddf8e6 JB |
3896 | |
3897 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
c9c5962b JB |
3898 | stats->last_signal = status->signal; |
3899 | if (!fast_rx->uses_rss) | |
3900 | ewma_signal_add(&sta->rx_stats_avg.signal, | |
3901 | -status->signal); | |
49ddf8e6 JB |
3902 | } |
3903 | ||
3904 | if (status->chains) { | |
3905 | int i; | |
3906 | ||
c9c5962b | 3907 | stats->chains = status->chains; |
49ddf8e6 JB |
3908 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
3909 | int signal = status->chain_signal[i]; | |
3910 | ||
3911 | if (!(status->chains & BIT(i))) | |
3912 | continue; | |
3913 | ||
c9c5962b JB |
3914 | stats->chain_signal_last[i] = signal; |
3915 | if (!fast_rx->uses_rss) | |
3916 | ewma_signal_add(&sta->rx_stats_avg.chain_signal[i], | |
3917 | -signal); | |
49ddf8e6 JB |
3918 | } |
3919 | } | |
3920 | /* end of statistics */ | |
3921 | ||
3922 | if (rx->key && !ieee80211_has_protected(hdr->frame_control)) | |
3923 | goto drop; | |
3924 | ||
3925 | /* do the header conversion - first grab the addresses */ | |
3926 | ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs); | |
3927 | ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs); | |
3928 | /* remove the SNAP but leave the ethertype */ | |
3929 | skb_pull(skb, snap_offs + sizeof(rfc1042_header)); | |
3930 | /* push the addresses in front */ | |
3931 | memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs)); | |
3932 | ||
3933 | skb->dev = fast_rx->dev; | |
3934 | ||
3935 | ieee80211_rx_stats(fast_rx->dev, skb->len); | |
3936 | ||
3937 | /* The seqno index has the same property as needed | |
3938 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS | |
3939 | * for non-QoS-data frames. Here we know it's a data | |
3940 | * frame, so count MSDUs. | |
3941 | */ | |
c9c5962b JB |
3942 | u64_stats_update_begin(&stats->syncp); |
3943 | stats->msdu[rx->seqno_idx]++; | |
3944 | stats->bytes += orig_len; | |
3945 | u64_stats_update_end(&stats->syncp); | |
49ddf8e6 JB |
3946 | |
3947 | if (fast_rx->internal_forward) { | |
eeb0d56f JB |
3948 | struct sk_buff *xmit_skb = NULL; |
3949 | bool multicast = is_multicast_ether_addr(skb->data); | |
49ddf8e6 | 3950 | |
eeb0d56f JB |
3951 | if (multicast) { |
3952 | xmit_skb = skb_copy(skb, GFP_ATOMIC); | |
3953 | } else if (sta_info_get(rx->sdata, skb->data)) { | |
3954 | xmit_skb = skb; | |
3955 | skb = NULL; | |
3956 | } | |
49ddf8e6 | 3957 | |
eeb0d56f | 3958 | if (xmit_skb) { |
49ddf8e6 JB |
3959 | /* |
3960 | * Send to wireless media and increase priority by 256 | |
3961 | * to keep the received priority instead of | |
3962 | * reclassifying the frame (see cfg80211_classify8021d). | |
3963 | */ | |
eeb0d56f JB |
3964 | xmit_skb->priority += 256; |
3965 | xmit_skb->protocol = htons(ETH_P_802_3); | |
3966 | skb_reset_network_header(xmit_skb); | |
3967 | skb_reset_mac_header(xmit_skb); | |
3968 | dev_queue_xmit(xmit_skb); | |
49ddf8e6 | 3969 | } |
eeb0d56f JB |
3970 | |
3971 | if (!skb) | |
3972 | return true; | |
49ddf8e6 JB |
3973 | } |
3974 | ||
3975 | /* deliver to local stack */ | |
3976 | skb->protocol = eth_type_trans(skb, fast_rx->dev); | |
3977 | memset(skb->cb, 0, sizeof(skb->cb)); | |
3978 | if (rx->napi) | |
3979 | napi_gro_receive(rx->napi, skb); | |
3980 | else | |
3981 | netif_receive_skb(skb); | |
3982 | ||
3983 | return true; | |
3984 | drop: | |
3985 | dev_kfree_skb(skb); | |
c9c5962b | 3986 | stats->dropped++; |
49ddf8e6 JB |
3987 | return true; |
3988 | } | |
3989 | ||
4406c376 JB |
3990 | /* |
3991 | * This function returns whether or not the SKB | |
3992 | * was destined for RX processing or not, which, | |
3993 | * if consume is true, is equivalent to whether | |
3994 | * or not the skb was consumed. | |
3995 | */ | |
3996 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3997 | struct sk_buff *skb, bool consume) | |
3998 | { | |
3999 | struct ieee80211_local *local = rx->local; | |
4000 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
4406c376 JB |
4001 | |
4002 | rx->skb = skb; | |
4406c376 | 4003 | |
49ddf8e6 JB |
4004 | /* See if we can do fast-rx; if we have to copy we already lost, |
4005 | * so punt in that case. We should never have to deliver a data | |
4006 | * frame to multiple interfaces anyway. | |
4007 | * | |
4008 | * We skip the ieee80211_accept_frame() call and do the necessary | |
4009 | * checking inside ieee80211_invoke_fast_rx(). | |
4010 | */ | |
4011 | if (consume && rx->sta) { | |
4012 | struct ieee80211_fast_rx *fast_rx; | |
4013 | ||
4014 | fast_rx = rcu_dereference(rx->sta->fast_rx); | |
4015 | if (fast_rx && ieee80211_invoke_fast_rx(rx, fast_rx)) | |
4016 | return true; | |
4017 | } | |
4018 | ||
a58fbe1a | 4019 | if (!ieee80211_accept_frame(rx)) |
4406c376 JB |
4020 | return false; |
4021 | ||
4406c376 JB |
4022 | if (!consume) { |
4023 | skb = skb_copy(skb, GFP_ATOMIC); | |
4024 | if (!skb) { | |
4025 | if (net_ratelimit()) | |
4026 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 4027 | "failed to copy skb for %s\n", |
4406c376 JB |
4028 | sdata->name); |
4029 | return true; | |
4030 | } | |
4031 | ||
4032 | rx->skb = skb; | |
4033 | } | |
4034 | ||
4035 | ieee80211_invoke_rx_handlers(rx); | |
4036 | return true; | |
4037 | } | |
4038 | ||
571ecf67 | 4039 | /* |
6b59db7d | 4040 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 4041 | * be called with rcu_read_lock protection. |
571ecf67 | 4042 | */ |
71ebb4aa | 4043 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
d63b548f | 4044 | struct ieee80211_sta *pubsta, |
af9f9b22 JB |
4045 | struct sk_buff *skb, |
4046 | struct napi_struct *napi) | |
571ecf67 JB |
4047 | { |
4048 | struct ieee80211_local *local = hw_to_local(hw); | |
4049 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 4050 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 4051 | __le16 fc; |
5cf121c3 | 4052 | struct ieee80211_rx_data rx; |
4406c376 | 4053 | struct ieee80211_sub_if_data *prev; |
83e7e4ce | 4054 | struct rhlist_head *tmp; |
e3cf8b3f | 4055 | int err = 0; |
571ecf67 | 4056 | |
e3cf8b3f | 4057 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
4058 | memset(&rx, 0, sizeof(rx)); |
4059 | rx.skb = skb; | |
4060 | rx.local = local; | |
af9f9b22 | 4061 | rx.napi = napi; |
72abd81b | 4062 | |
e3cf8b3f | 4063 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
c206ca67 | 4064 | I802_DEBUG_INC(local->dot11ReceivedFragmentCount); |
571ecf67 | 4065 | |
4a4f1a58 JB |
4066 | if (ieee80211_is_mgmt(fc)) { |
4067 | /* drop frame if too short for header */ | |
4068 | if (skb->len < ieee80211_hdrlen(fc)) | |
4069 | err = -ENOBUFS; | |
4070 | else | |
4071 | err = skb_linearize(skb); | |
4072 | } else { | |
e3cf8b3f | 4073 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 4074 | } |
e3cf8b3f ZY |
4075 | |
4076 | if (err) { | |
4077 | dev_kfree_skb(skb); | |
4078 | return; | |
4079 | } | |
4080 | ||
4081 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 4082 | ieee80211_parse_qos(&rx); |
d1c3a37c | 4083 | ieee80211_verify_alignment(&rx); |
38f3714d | 4084 | |
d48b2968 JB |
4085 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
4086 | ieee80211_is_beacon(hdr->frame_control))) | |
4087 | ieee80211_scan_rx(local, skb); | |
4088 | ||
19d19e96 | 4089 | if (ieee80211_is_data(fc)) { |
d63b548f | 4090 | struct sta_info *sta, *prev_sta; |
7bedd0cf | 4091 | |
19d19e96 JB |
4092 | if (pubsta) { |
4093 | rx.sta = container_of(pubsta, struct sta_info, sta); | |
4094 | rx.sdata = rx.sta->sdata; | |
4095 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) | |
4096 | return; | |
4097 | goto out; | |
4098 | } | |
4099 | ||
56af3268 | 4100 | prev_sta = NULL; |
4406c376 | 4101 | |
83e7e4ce | 4102 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
4103 | if (!prev_sta) { |
4104 | prev_sta = sta; | |
4105 | continue; | |
4106 | } | |
4107 | ||
4108 | rx.sta = prev_sta; | |
4109 | rx.sdata = prev_sta->sdata; | |
4406c376 | 4110 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 4111 | |
56af3268 | 4112 | prev_sta = sta; |
4406c376 | 4113 | } |
56af3268 BG |
4114 | |
4115 | if (prev_sta) { | |
4116 | rx.sta = prev_sta; | |
4117 | rx.sdata = prev_sta->sdata; | |
4118 | ||
4406c376 | 4119 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 4120 | return; |
8e26d5ad | 4121 | goto out; |
56af3268 | 4122 | } |
4406c376 JB |
4123 | } |
4124 | ||
4b0dd98e | 4125 | prev = NULL; |
b2e7771e | 4126 | |
4b0dd98e JB |
4127 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
4128 | if (!ieee80211_sdata_running(sdata)) | |
4129 | continue; | |
340e11f3 | 4130 | |
4b0dd98e JB |
4131 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
4132 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
4133 | continue; | |
340e11f3 | 4134 | |
4b0dd98e JB |
4135 | /* |
4136 | * frame is destined for this interface, but if it's | |
4137 | * not also for the previous one we handle that after | |
4138 | * the loop to avoid copying the SKB once too much | |
4139 | */ | |
4bb29f8c | 4140 | |
4b0dd98e | 4141 | if (!prev) { |
abe60632 | 4142 | prev = sdata; |
4b0dd98e | 4143 | continue; |
340e11f3 | 4144 | } |
4bb29f8c | 4145 | |
7852e361 | 4146 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
4147 | rx.sdata = prev; |
4148 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 4149 | |
4b0dd98e JB |
4150 | prev = sdata; |
4151 | } | |
4152 | ||
4153 | if (prev) { | |
7852e361 | 4154 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 4155 | rx.sdata = prev; |
4406c376 | 4156 | |
4b0dd98e JB |
4157 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
4158 | return; | |
571ecf67 | 4159 | } |
4406c376 | 4160 | |
8e26d5ad | 4161 | out: |
4406c376 | 4162 | dev_kfree_skb(skb); |
571ecf67 | 4163 | } |
6368e4b1 RR |
4164 | |
4165 | /* | |
4166 | * This is the receive path handler. It is called by a low level driver when an | |
4167 | * 802.11 MPDU is received from the hardware. | |
4168 | */ | |
d63b548f JB |
4169 | void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta, |
4170 | struct sk_buff *skb, struct napi_struct *napi) | |
6368e4b1 RR |
4171 | { |
4172 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
4173 | struct ieee80211_rate *rate = NULL; |
4174 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 4175 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 4176 | |
d20ef63d JB |
4177 | WARN_ON_ONCE(softirq_count() == 0); |
4178 | ||
57fbcce3 | 4179 | if (WARN_ON(status->band >= NUM_NL80211_BANDS)) |
77a980dc | 4180 | goto drop; |
8318d78a JB |
4181 | |
4182 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
4183 | if (WARN_ON(!sband)) |
4184 | goto drop; | |
8318d78a | 4185 | |
89c3a8ac JB |
4186 | /* |
4187 | * If we're suspending, it is possible although not too likely | |
4188 | * that we'd be receiving frames after having already partially | |
4189 | * quiesced the stack. We can't process such frames then since | |
4190 | * that might, for example, cause stations to be added or other | |
4191 | * driver callbacks be invoked. | |
4192 | */ | |
77a980dc JB |
4193 | if (unlikely(local->quiescing || local->suspended)) |
4194 | goto drop; | |
89c3a8ac | 4195 | |
04800ada AN |
4196 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
4197 | if (unlikely(local->in_reconfig)) | |
4198 | goto drop; | |
4199 | ||
ea77f12f JB |
4200 | /* |
4201 | * The same happens when we're not even started, | |
4202 | * but that's worth a warning. | |
4203 | */ | |
77a980dc JB |
4204 | if (WARN_ON(!local->started)) |
4205 | goto drop; | |
ea77f12f | 4206 | |
fc885189 | 4207 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 4208 | /* |
fc885189 JB |
4209 | * Validate the rate, unless a PLCP error means that |
4210 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 4211 | */ |
fc885189 JB |
4212 | |
4213 | if (status->flag & RX_FLAG_HT) { | |
4214 | /* | |
4215 | * rate_idx is MCS index, which can be [0-76] | |
4216 | * as documented on: | |
4217 | * | |
4218 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
4219 | * | |
4220 | * Anything else would be some sort of driver or | |
4221 | * hardware error. The driver should catch hardware | |
4222 | * errors. | |
4223 | */ | |
444e3803 | 4224 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
4225 | "Rate marked as an HT rate but passed " |
4226 | "status->rate_idx is not " | |
4227 | "an MCS index [0-76]: %d (0x%02x)\n", | |
4228 | status->rate_idx, | |
4229 | status->rate_idx)) | |
4230 | goto drop; | |
5614618e JB |
4231 | } else if (status->flag & RX_FLAG_VHT) { |
4232 | if (WARN_ONCE(status->rate_idx > 9 || | |
4233 | !status->vht_nss || | |
4234 | status->vht_nss > 8, | |
4235 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
4236 | status->rate_idx, status->vht_nss)) | |
4237 | goto drop; | |
fc885189 | 4238 | } else { |
444e3803 | 4239 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
4240 | goto drop; |
4241 | rate = &sband->bitrates[status->rate_idx]; | |
4242 | } | |
0fb8ca45 | 4243 | } |
6368e4b1 | 4244 | |
554891e6 JB |
4245 | status->rx_flags = 0; |
4246 | ||
6368e4b1 RR |
4247 | /* |
4248 | * key references and virtual interfaces are protected using RCU | |
4249 | * and this requires that we are in a read-side RCU section during | |
4250 | * receive processing | |
4251 | */ | |
4252 | rcu_read_lock(); | |
4253 | ||
4254 | /* | |
4255 | * Frames with failed FCS/PLCP checksum are not returned, | |
4256 | * all other frames are returned without radiotap header | |
4257 | * if it was previously present. | |
4258 | * Also, frames with less than 16 bytes are dropped. | |
4259 | */ | |
f1d58c25 | 4260 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
4261 | if (!skb) { |
4262 | rcu_read_unlock(); | |
4263 | return; | |
4264 | } | |
4265 | ||
e1e54068 JB |
4266 | ieee80211_tpt_led_trig_rx(local, |
4267 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
4268 | skb->len); | |
d63b548f JB |
4269 | |
4270 | __ieee80211_rx_handle_packet(hw, pubsta, skb, napi); | |
6368e4b1 RR |
4271 | |
4272 | rcu_read_unlock(); | |
77a980dc JB |
4273 | |
4274 | return; | |
4275 | drop: | |
4276 | kfree_skb(skb); | |
6368e4b1 | 4277 | } |
af9f9b22 | 4278 | EXPORT_SYMBOL(ieee80211_rx_napi); |
571ecf67 JB |
4279 | |
4280 | /* This is a version of the rx handler that can be called from hard irq | |
4281 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 4282 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
4283 | { |
4284 | struct ieee80211_local *local = hw_to_local(hw); | |
4285 | ||
4286 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
4287 | ||
571ecf67 JB |
4288 | skb->pkt_type = IEEE80211_RX_MSG; |
4289 | skb_queue_tail(&local->skb_queue, skb); | |
4290 | tasklet_schedule(&local->tasklet); | |
4291 | } | |
4292 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |