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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
571ecf67 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
ab46623e | 13 | #include <linux/jiffies.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
571ecf67 JB |
15 | #include <linux/kernel.h> |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/etherdevice.h> | |
d4e46a3d | 19 | #include <linux/rcupdate.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
571ecf67 JB |
21 | #include <net/mac80211.h> |
22 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 23 | #include <asm/unaligned.h> |
571ecf67 JB |
24 | |
25 | #include "ieee80211_i.h" | |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 | 27 | #include "led.h" |
33b64eb2 | 28 | #include "mesh.h" |
571ecf67 JB |
29 | #include "wep.h" |
30 | #include "wpa.h" | |
31 | #include "tkip.h" | |
32 | #include "wme.h" | |
1d8d3dec | 33 | #include "rate.h" |
571ecf67 | 34 | |
5a490510 JB |
35 | static inline void ieee80211_rx_stats(struct net_device *dev, u32 len) |
36 | { | |
37 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); | |
38 | ||
39 | u64_stats_update_begin(&tstats->syncp); | |
40 | tstats->rx_packets++; | |
41 | tstats->rx_bytes += len; | |
42 | u64_stats_update_end(&tstats->syncp); | |
43 | } | |
44 | ||
a6828493 JB |
45 | static u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
46 | enum nl80211_iftype type) | |
47 | { | |
48 | __le16 fc = hdr->frame_control; | |
49 | ||
50 | if (ieee80211_is_data(fc)) { | |
51 | if (len < 24) /* drop incorrect hdr len (data) */ | |
52 | return NULL; | |
53 | ||
54 | if (ieee80211_has_a4(fc)) | |
55 | return NULL; | |
56 | if (ieee80211_has_tods(fc)) | |
57 | return hdr->addr1; | |
58 | if (ieee80211_has_fromds(fc)) | |
59 | return hdr->addr2; | |
60 | ||
61 | return hdr->addr3; | |
62 | } | |
63 | ||
64 | if (ieee80211_is_mgmt(fc)) { | |
65 | if (len < 24) /* drop incorrect hdr len (mgmt) */ | |
66 | return NULL; | |
67 | return hdr->addr3; | |
68 | } | |
69 | ||
70 | if (ieee80211_is_ctl(fc)) { | |
71 | if (ieee80211_is_pspoll(fc)) | |
72 | return hdr->addr1; | |
73 | ||
74 | if (ieee80211_is_back_req(fc)) { | |
75 | switch (type) { | |
76 | case NL80211_IFTYPE_STATION: | |
77 | return hdr->addr2; | |
78 | case NL80211_IFTYPE_AP: | |
79 | case NL80211_IFTYPE_AP_VLAN: | |
80 | return hdr->addr1; | |
81 | default: | |
82 | break; /* fall through to the return */ | |
83 | } | |
84 | } | |
85 | } | |
86 | ||
87 | return NULL; | |
88 | } | |
89 | ||
b2e7771e JB |
90 | /* |
91 | * monitor mode reception | |
92 | * | |
93 | * This function cleans up the SKB, i.e. it removes all the stuff | |
94 | * only useful for monitoring. | |
95 | */ | |
96 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
1f7bba79 JB |
97 | struct sk_buff *skb, |
98 | unsigned int rtap_vendor_space) | |
b2e7771e | 99 | { |
30686bf7 | 100 | if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) { |
b2e7771e | 101 | if (likely(skb->len > FCS_LEN)) |
e3cf8b3f | 102 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
103 | else { |
104 | /* driver bug */ | |
105 | WARN_ON(1); | |
106 | dev_kfree_skb(skb); | |
0624760c | 107 | return NULL; |
b2e7771e JB |
108 | } |
109 | } | |
110 | ||
1f7bba79 JB |
111 | __pskb_pull(skb, rtap_vendor_space); |
112 | ||
b2e7771e JB |
113 | return skb; |
114 | } | |
115 | ||
1f7bba79 JB |
116 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, |
117 | unsigned int rtap_vendor_space) | |
b2e7771e | 118 | { |
f1d58c25 | 119 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1f7bba79 JB |
120 | struct ieee80211_hdr *hdr; |
121 | ||
122 | hdr = (void *)(skb->data + rtap_vendor_space); | |
b2e7771e | 123 | |
4c298677 JB |
124 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
125 | RX_FLAG_FAILED_PLCP_CRC | | |
126 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
6b59db7d ZG |
127 | return true; |
128 | ||
1f7bba79 | 129 | if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) |
6b59db7d ZG |
130 | return true; |
131 | ||
87228f57 HH |
132 | if (ieee80211_is_ctl(hdr->frame_control) && |
133 | !ieee80211_is_pspoll(hdr->frame_control) && | |
134 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
135 | return true; |
136 | ||
137 | return false; | |
b2e7771e JB |
138 | } |
139 | ||
601ae7f2 | 140 | static int |
1f7bba79 JB |
141 | ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, |
142 | struct ieee80211_rx_status *status, | |
143 | struct sk_buff *skb) | |
601ae7f2 BR |
144 | { |
145 | int len; | |
146 | ||
147 | /* always present fields */ | |
a144f378 | 148 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 149 | |
a144f378 | 150 | /* allocate extra bitmaps */ |
a144f378 JB |
151 | if (status->chains) |
152 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
153 | |
154 | if (ieee80211_have_rx_timestamp(status)) { | |
155 | len = ALIGN(len, 8); | |
601ae7f2 | 156 | len += 8; |
90b9e446 | 157 | } |
30686bf7 | 158 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) |
601ae7f2 | 159 | len += 1; |
601ae7f2 | 160 | |
a144f378 JB |
161 | /* antenna field, if we don't have per-chain info */ |
162 | if (!status->chains) | |
163 | len += 1; | |
164 | ||
90b9e446 JB |
165 | /* padding for RX_FLAGS if necessary */ |
166 | len = ALIGN(len, 2); | |
601ae7f2 | 167 | |
6d744bac JB |
168 | if (status->flag & RX_FLAG_HT) /* HT info */ |
169 | len += 3; | |
170 | ||
4c298677 | 171 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 172 | len = ALIGN(len, 4); |
4c298677 JB |
173 | len += 8; |
174 | } | |
175 | ||
51648921 JB |
176 | if (status->flag & RX_FLAG_VHT) { |
177 | len = ALIGN(len, 2); | |
178 | len += 12; | |
179 | } | |
180 | ||
a144f378 JB |
181 | if (status->chains) { |
182 | /* antenna and antenna signal fields */ | |
183 | len += 2 * hweight8(status->chains); | |
184 | } | |
185 | ||
1f7bba79 JB |
186 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
187 | struct ieee80211_vendor_radiotap *rtap = (void *)skb->data; | |
188 | ||
189 | /* vendor presence bitmap */ | |
190 | len += 4; | |
191 | /* alignment for fixed 6-byte vendor data header */ | |
192 | len = ALIGN(len, 2); | |
193 | /* vendor data header */ | |
194 | len += 6; | |
195 | if (WARN_ON(rtap->align == 0)) | |
196 | rtap->align = 1; | |
197 | len = ALIGN(len, rtap->align); | |
198 | len += rtap->len + rtap->pad; | |
199 | } | |
200 | ||
601ae7f2 BR |
201 | return len; |
202 | } | |
203 | ||
00ea6deb | 204 | /* |
601ae7f2 BR |
205 | * ieee80211_add_rx_radiotap_header - add radiotap header |
206 | * | |
207 | * add a radiotap header containing all the fields which the hardware provided. | |
208 | */ | |
209 | static void | |
210 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
211 | struct sk_buff *skb, | |
601ae7f2 | 212 | struct ieee80211_rate *rate, |
973ef21a | 213 | int rtap_len, bool has_fcs) |
601ae7f2 | 214 | { |
f1d58c25 | 215 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
216 | struct ieee80211_radiotap_header *rthdr; |
217 | unsigned char *pos; | |
a144f378 JB |
218 | __le32 *it_present; |
219 | u32 it_present_val; | |
6a86b9c7 | 220 | u16 rx_flags = 0; |
a5e70697 | 221 | u16 channel_flags = 0; |
a144f378 JB |
222 | int mpdulen, chain; |
223 | unsigned long chains = status->chains; | |
1f7bba79 JB |
224 | struct ieee80211_vendor_radiotap rtap = {}; |
225 | ||
226 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
227 | rtap = *(struct ieee80211_vendor_radiotap *)skb->data; | |
228 | /* rtap.len and rtap.pad are undone immediately */ | |
229 | skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad); | |
230 | } | |
f4bda337 TP |
231 | |
232 | mpdulen = skb->len; | |
30686bf7 | 233 | if (!(has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS))) |
f4bda337 | 234 | mpdulen += FCS_LEN; |
601ae7f2 BR |
235 | |
236 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
1f7bba79 | 237 | memset(rthdr, 0, rtap_len - rtap.len - rtap.pad); |
a144f378 | 238 | it_present = &rthdr->it_present; |
601ae7f2 BR |
239 | |
240 | /* radiotap header, set always present flags */ | |
0059b2b1 | 241 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
242 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
243 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
244 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
245 | ||
246 | if (!status->chains) | |
247 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
248 | ||
249 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
250 | it_present_val |= | |
251 | BIT(IEEE80211_RADIOTAP_EXT) | | |
252 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
253 | put_unaligned_le32(it_present_val, it_present); | |
254 | it_present++; | |
255 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
256 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
257 | } | |
601ae7f2 | 258 | |
1f7bba79 JB |
259 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
260 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | | |
261 | BIT(IEEE80211_RADIOTAP_EXT); | |
262 | put_unaligned_le32(it_present_val, it_present); | |
263 | it_present++; | |
264 | it_present_val = rtap.present; | |
265 | } | |
266 | ||
a144f378 JB |
267 | put_unaligned_le32(it_present_val, it_present); |
268 | ||
269 | pos = (void *)(it_present + 1); | |
270 | ||
601ae7f2 BR |
271 | /* the order of the following fields is important */ |
272 | ||
273 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 274 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
275 | /* padding */ |
276 | while ((pos - (u8 *)rthdr) & 7) | |
277 | *pos++ = 0; | |
f4bda337 TP |
278 | put_unaligned_le64( |
279 | ieee80211_calculate_rx_timestamp(local, status, | |
280 | mpdulen, 0), | |
281 | pos); | |
1df332e8 | 282 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
283 | pos += 8; |
284 | } | |
285 | ||
286 | /* IEEE80211_RADIOTAP_FLAGS */ | |
30686bf7 | 287 | if (has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
601ae7f2 | 288 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
289 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
290 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
291 | if (status->flag & RX_FLAG_SHORTPRE) |
292 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
293 | pos++; |
294 | ||
295 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 296 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 297 | /* |
f8d1ccf1 | 298 | * Without rate information don't add it. If we have, |
38f37be2 | 299 | * MCS information is a separate field in radiotap, |
73b48099 JB |
300 | * added below. The byte here is needed as padding |
301 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
302 | */ |
303 | *pos = 0; | |
8d6f658e | 304 | } else { |
2103dec1 | 305 | int shift = 0; |
ebe6c7ba | 306 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
307 | if (status->flag & RX_FLAG_10MHZ) |
308 | shift = 1; | |
309 | else if (status->flag & RX_FLAG_5MHZ) | |
310 | shift = 2; | |
311 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 312 | } |
601ae7f2 BR |
313 | pos++; |
314 | ||
315 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 316 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 317 | pos += 2; |
a5e70697 SW |
318 | if (status->flag & RX_FLAG_10MHZ) |
319 | channel_flags |= IEEE80211_CHAN_HALF; | |
320 | else if (status->flag & RX_FLAG_5MHZ) | |
321 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
322 | ||
601ae7f2 | 323 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 324 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 325 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 326 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 327 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 328 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 329 | else if (rate) |
3a5c5e81 | 330 | channel_flags |= IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 331 | else |
a5e70697 SW |
332 | channel_flags |= IEEE80211_CHAN_2GHZ; |
333 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
334 | pos += 2; |
335 | ||
336 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
30686bf7 | 337 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM) && |
fe8431f8 | 338 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
601ae7f2 BR |
339 | *pos = status->signal; |
340 | rthdr->it_present |= | |
341 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
342 | pos++; | |
343 | } | |
344 | ||
601ae7f2 BR |
345 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
346 | ||
a144f378 JB |
347 | if (!status->chains) { |
348 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
349 | *pos = status->antenna; | |
350 | pos++; | |
351 | } | |
601ae7f2 | 352 | |
601ae7f2 BR |
353 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
354 | ||
355 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
356 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 357 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 358 | *pos++ = 0; |
aae89831 | 359 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
360 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
361 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 362 | pos += 2; |
6d744bac JB |
363 | |
364 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
365 | unsigned int stbc; |
366 | ||
6d744bac | 367 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 368 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
369 | *pos = 0; |
370 | if (status->flag & RX_FLAG_SHORT_GI) | |
371 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
372 | if (status->flag & RX_FLAG_40MHZ) | |
373 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
374 | if (status->flag & RX_FLAG_HT_GF) |
375 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
376 | if (status->flag & RX_FLAG_LDPC) |
377 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
378 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
379 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
380 | pos++; |
381 | *pos++ = status->rate_idx; | |
382 | } | |
4c298677 JB |
383 | |
384 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
385 | u16 flags = 0; | |
386 | ||
387 | /* ensure 4 byte alignment */ | |
388 | while ((pos - (u8 *)rthdr) & 3) | |
389 | pos++; | |
390 | rthdr->it_present |= | |
391 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
392 | put_unaligned_le32(status->ampdu_reference, pos); | |
393 | pos += 4; | |
394 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
395 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
396 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
397 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
398 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
399 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
400 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
401 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
402 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
403 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
404 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
405 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
406 | put_unaligned_le16(flags, pos); | |
407 | pos += 2; | |
408 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
409 | *pos++ = status->ampdu_delimiter_crc; | |
410 | else | |
411 | *pos++ = 0; | |
412 | *pos++ = 0; | |
413 | } | |
90b9e446 | 414 | |
51648921 JB |
415 | if (status->flag & RX_FLAG_VHT) { |
416 | u16 known = local->hw.radiotap_vht_details; | |
417 | ||
418 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
51648921 JB |
419 | put_unaligned_le16(known, pos); |
420 | pos += 2; | |
421 | /* flags */ | |
422 | if (status->flag & RX_FLAG_SHORT_GI) | |
423 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
424 | /* in VHT, STBC is binary */ |
425 | if (status->flag & RX_FLAG_STBC_MASK) | |
426 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
427 | if (status->vht_flag & RX_VHT_FLAG_BF) |
428 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
429 | pos++; |
430 | /* bandwidth */ | |
1b8d242a | 431 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 432 | *pos++ = 4; |
1b8d242a | 433 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
434 | *pos++ = 11; |
435 | else if (status->flag & RX_FLAG_40MHZ) | |
436 | *pos++ = 1; | |
437 | else /* 20 MHz */ | |
438 | *pos++ = 0; | |
439 | /* MCS/NSS */ | |
440 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
441 | pos += 4; | |
442 | /* coding field */ | |
63c361f5 EG |
443 | if (status->flag & RX_FLAG_LDPC) |
444 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
445 | pos++; |
446 | /* group ID */ | |
447 | pos++; | |
448 | /* partial_aid */ | |
449 | pos += 2; | |
450 | } | |
451 | ||
a144f378 JB |
452 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
453 | *pos++ = status->chain_signal[chain]; | |
454 | *pos++ = chain; | |
455 | } | |
1f7bba79 JB |
456 | |
457 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
458 | /* ensure 2 byte alignment for the vendor field as required */ | |
459 | if ((pos - (u8 *)rthdr) & 1) | |
460 | *pos++ = 0; | |
461 | *pos++ = rtap.oui[0]; | |
462 | *pos++ = rtap.oui[1]; | |
463 | *pos++ = rtap.oui[2]; | |
464 | *pos++ = rtap.subns; | |
465 | put_unaligned_le16(rtap.len, pos); | |
466 | pos += 2; | |
467 | /* align the actual payload as requested */ | |
468 | while ((pos - (u8 *)rthdr) & (rtap.align - 1)) | |
469 | *pos++ = 0; | |
470 | /* data (and possible padding) already follows */ | |
471 | } | |
601ae7f2 BR |
472 | } |
473 | ||
b2e7771e JB |
474 | /* |
475 | * This function copies a received frame to all monitor interfaces and | |
476 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
477 | * radiotap header the driver might have added. | |
478 | */ | |
479 | static struct sk_buff * | |
480 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 481 | struct ieee80211_rate *rate) |
b2e7771e | 482 | { |
f1d58c25 | 483 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 484 | struct ieee80211_sub_if_data *sdata; |
1f7bba79 | 485 | int rt_hdrlen, needed_headroom; |
b2e7771e JB |
486 | struct sk_buff *skb, *skb2; |
487 | struct net_device *prev_dev = NULL; | |
488 | int present_fcs_len = 0; | |
1f7bba79 JB |
489 | unsigned int rtap_vendor_space = 0; |
490 | ||
491 | if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) { | |
492 | struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data; | |
493 | ||
494 | rtap_vendor_space = sizeof(*rtap) + rtap->len + rtap->pad; | |
495 | } | |
b2e7771e JB |
496 | |
497 | /* | |
498 | * First, we may need to make a copy of the skb because | |
499 | * (1) we need to modify it for radiotap (if not present), and | |
500 | * (2) the other RX handlers will modify the skb we got. | |
501 | * | |
502 | * We don't need to, of course, if we aren't going to return | |
503 | * the SKB because it has a bad FCS/PLCP checksum. | |
504 | */ | |
0869aea0 | 505 | |
30686bf7 | 506 | if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
b2e7771e JB |
507 | present_fcs_len = FCS_LEN; |
508 | ||
1f7bba79 JB |
509 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
510 | if (!pskb_may_pull(origskb, 2 + rtap_vendor_space)) { | |
e3cf8b3f ZY |
511 | dev_kfree_skb(origskb); |
512 | return NULL; | |
513 | } | |
514 | ||
b2e7771e | 515 | if (!local->monitors) { |
1f7bba79 JB |
516 | if (should_drop_frame(origskb, present_fcs_len, |
517 | rtap_vendor_space)) { | |
b2e7771e JB |
518 | dev_kfree_skb(origskb); |
519 | return NULL; | |
520 | } | |
521 | ||
1f7bba79 | 522 | return remove_monitor_info(local, origskb, rtap_vendor_space); |
b2e7771e JB |
523 | } |
524 | ||
751413ea | 525 | /* room for the radiotap header based on driver features */ |
1f7bba79 JB |
526 | rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, origskb); |
527 | needed_headroom = rt_hdrlen - rtap_vendor_space; | |
751413ea | 528 | |
1f7bba79 | 529 | if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { |
b2e7771e JB |
530 | /* only need to expand headroom if necessary */ |
531 | skb = origskb; | |
532 | origskb = NULL; | |
533 | ||
534 | /* | |
535 | * This shouldn't trigger often because most devices have an | |
536 | * RX header they pull before we get here, and that should | |
537 | * be big enough for our radiotap information. We should | |
538 | * probably export the length to drivers so that we can have | |
539 | * them allocate enough headroom to start with. | |
540 | */ | |
541 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 542 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
543 | dev_kfree_skb(skb); |
544 | return NULL; | |
545 | } | |
546 | } else { | |
547 | /* | |
548 | * Need to make a copy and possibly remove radiotap header | |
549 | * and FCS from the original. | |
550 | */ | |
551 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
552 | ||
1f7bba79 JB |
553 | origskb = remove_monitor_info(local, origskb, |
554 | rtap_vendor_space); | |
b2e7771e JB |
555 | |
556 | if (!skb) | |
557 | return origskb; | |
558 | } | |
559 | ||
0869aea0 | 560 | /* prepend radiotap information */ |
1f7bba79 | 561 | ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true); |
b2e7771e | 562 | |
ce3edf6d | 563 | skb_reset_mac_header(skb); |
b2e7771e JB |
564 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
565 | skb->pkt_type = PACKET_OTHERHOST; | |
566 | skb->protocol = htons(ETH_P_802_2); | |
567 | ||
568 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 569 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
570 | continue; |
571 | ||
3d30d949 MW |
572 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
573 | continue; | |
574 | ||
9607e6b6 | 575 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
576 | continue; |
577 | ||
b2e7771e JB |
578 | if (prev_dev) { |
579 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
580 | if (skb2) { | |
581 | skb2->dev = prev_dev; | |
5548a8a1 | 582 | netif_receive_skb(skb2); |
b2e7771e JB |
583 | } |
584 | } | |
585 | ||
586 | prev_dev = sdata->dev; | |
5a490510 | 587 | ieee80211_rx_stats(sdata->dev, skb->len); |
b2e7771e JB |
588 | } |
589 | ||
590 | if (prev_dev) { | |
591 | skb->dev = prev_dev; | |
5548a8a1 | 592 | netif_receive_skb(skb); |
b2e7771e JB |
593 | } else |
594 | dev_kfree_skb(skb); | |
595 | ||
596 | return origskb; | |
597 | } | |
598 | ||
5cf121c3 | 599 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 600 | { |
238f74a2 | 601 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 602 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 603 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
604 | |
605 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
606 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
607 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 608 | /* frame has qos control */ |
238f74a2 | 609 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 610 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 611 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
612 | |
613 | seqno_idx = tid; | |
614 | security_idx = tid; | |
6e0d114d | 615 | } else { |
1411f9b5 JB |
616 | /* |
617 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
618 | * | |
619 | * Sequence numbers for management frames, QoS data | |
620 | * frames with a broadcast/multicast address in the | |
621 | * Address 1 field, and all non-QoS data frames sent | |
622 | * by QoS STAs are assigned using an additional single | |
623 | * modulo-4096 counter, [...] | |
624 | * | |
625 | * We also use that counter for non-QoS STAs. | |
626 | */ | |
5a306f58 | 627 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
628 | security_idx = 0; |
629 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 630 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 631 | tid = 0; |
6e0d114d | 632 | } |
52865dfd | 633 | |
9e26297a JB |
634 | rx->seqno_idx = seqno_idx; |
635 | rx->security_idx = security_idx; | |
6e0d114d JB |
636 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
637 | * For now, set skb->priority to 0 for other cases. */ | |
638 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 639 | } |
6e0d114d | 640 | |
d1c3a37c JB |
641 | /** |
642 | * DOC: Packet alignment | |
643 | * | |
644 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
645 | * to the stack. | |
646 | * | |
647 | * Additionally, should, if possible, align the payload data in a way that | |
648 | * guarantees that the contained IP header is aligned to a four-byte | |
649 | * boundary. In the case of regular frames, this simply means aligning the | |
650 | * payload to a four-byte boundary (because either the IP header is directly | |
651 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
652 | * in front of it). If the payload data is not properly aligned and the |
653 | * architecture doesn't support efficient unaligned operations, mac80211 | |
654 | * will align the data. | |
d1c3a37c JB |
655 | * |
656 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
657 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
658 | * push the IP header further back to a multiple of four again. Thankfully, the | |
659 | * specs were sane enough this time around to require padding each A-MSDU | |
660 | * subframe to a length that is a multiple of four. | |
661 | * | |
25985edc | 662 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
663 | * the payload is not supported, the driver is required to move the 802.11 |
664 | * header to be directly in front of the payload in that case. | |
665 | */ | |
666 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 667 | { |
59d9cb07 KV |
668 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
669 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
670 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 671 | #endif |
6e0d114d JB |
672 | } |
673 | ||
6368e4b1 | 674 | |
571ecf67 JB |
675 | /* rx handlers */ |
676 | ||
3cfcf6ac JM |
677 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
678 | { | |
679 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
680 | ||
d8ca16db | 681 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
682 | return 0; |
683 | ||
d8ca16db | 684 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
685 | } |
686 | ||
687 | ||
688 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
689 | { | |
690 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
691 | ||
d8ca16db | 692 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
693 | return 0; |
694 | ||
d8ca16db | 695 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
696 | } |
697 | ||
698 | ||
699 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
700 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
701 | { | |
702 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
703 | struct ieee80211_mmie *mmie; | |
56c52da2 | 704 | struct ieee80211_mmie_16 *mmie16; |
3cfcf6ac | 705 | |
1df332e8 | 706 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
707 | return -1; |
708 | ||
d8ca16db | 709 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
710 | return -1; /* not a robust management frame */ |
711 | ||
712 | mmie = (struct ieee80211_mmie *) | |
713 | (skb->data + skb->len - sizeof(*mmie)); | |
56c52da2 JM |
714 | if (mmie->element_id == WLAN_EID_MMIE && |
715 | mmie->length == sizeof(*mmie) - 2) | |
716 | return le16_to_cpu(mmie->key_id); | |
717 | ||
718 | mmie16 = (struct ieee80211_mmie_16 *) | |
719 | (skb->data + skb->len - sizeof(*mmie16)); | |
720 | if (skb->len >= 24 + sizeof(*mmie16) && | |
721 | mmie16->element_id == WLAN_EID_MMIE && | |
722 | mmie16->length == sizeof(*mmie16) - 2) | |
723 | return le16_to_cpu(mmie16->key_id); | |
724 | ||
725 | return -1; | |
3cfcf6ac JM |
726 | } |
727 | ||
2475b1cc MS |
728 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
729 | struct sk_buff *skb) | |
730 | { | |
731 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
732 | __le16 fc; | |
733 | int hdrlen; | |
734 | u8 keyid; | |
735 | ||
736 | fc = hdr->frame_control; | |
737 | hdrlen = ieee80211_hdrlen(fc); | |
738 | ||
739 | if (skb->len < hdrlen + cs->hdr_len) | |
740 | return -EINVAL; | |
741 | ||
742 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
743 | keyid &= cs->key_idx_mask; | |
744 | keyid >>= cs->key_idx_shift; | |
745 | ||
746 | return keyid; | |
747 | } | |
748 | ||
1df332e8 | 749 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 750 | { |
a7767f95 | 751 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 752 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 753 | |
a7767f95 | 754 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
755 | if (is_multicast_ether_addr(hdr->addr1)) { |
756 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 757 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 758 | return RX_DROP_MONITOR; |
b203ca39 | 759 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
760 | return RX_DROP_MONITOR; |
761 | } else { | |
762 | if (!ieee80211_has_a4(hdr->frame_control)) | |
763 | return RX_DROP_MONITOR; | |
b203ca39 | 764 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
765 | return RX_DROP_MONITOR; |
766 | } | |
33b64eb2 LCC |
767 | } |
768 | ||
769 | /* If there is not an established peer link and this is not a peer link | |
770 | * establisment frame, beacon or probe, drop the frame. | |
771 | */ | |
772 | ||
57cf8043 | 773 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 774 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 775 | |
a7767f95 | 776 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
777 | return RX_DROP_MONITOR; |
778 | ||
a7767f95 | 779 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 780 | u8 category; |
9b395bc3 JB |
781 | |
782 | /* make sure category field is present */ | |
783 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
784 | return RX_DROP_MONITOR; | |
785 | ||
33b64eb2 | 786 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
787 | category = mgmt->u.action.category; |
788 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 789 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 790 | return RX_DROP_MONITOR; |
33b64eb2 | 791 | return RX_CONTINUE; |
33b64eb2 LCC |
792 | } |
793 | ||
a7767f95 HH |
794 | if (ieee80211_is_probe_req(hdr->frame_control) || |
795 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
796 | ieee80211_is_beacon(hdr->frame_control) || |
797 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
798 | return RX_CONTINUE; |
799 | ||
800 | return RX_DROP_MONITOR; | |
a7767f95 HH |
801 | } |
802 | ||
902acc78 JB |
803 | return RX_CONTINUE; |
804 | } | |
33b64eb2 | 805 | |
d3b2fb53 | 806 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 807 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
808 | int index, |
809 | struct sk_buff_head *frames) | |
1edfb1af | 810 | { |
83eb935e MK |
811 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
812 | struct sk_buff *skb; | |
4cfda47b | 813 | struct ieee80211_rx_status *status; |
1edfb1af | 814 | |
dd318575 JB |
815 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
816 | ||
83eb935e | 817 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
818 | goto no_frame; |
819 | ||
83eb935e MK |
820 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
821 | __skb_queue_purge(skb_list); | |
822 | goto no_frame; | |
823 | } | |
824 | ||
825 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 826 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
827 | while ((skb = __skb_dequeue(skb_list))) { |
828 | status = IEEE80211_SKB_RXCB(skb); | |
829 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
830 | __skb_queue_tail(frames, skb); | |
831 | } | |
1edfb1af JB |
832 | |
833 | no_frame: | |
9a886586 | 834 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
835 | } |
836 | ||
d3b2fb53 | 837 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 838 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
839 | u16 head_seq_num, |
840 | struct sk_buff_head *frames) | |
1edfb1af JB |
841 | { |
842 | int index; | |
843 | ||
dd318575 JB |
844 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
845 | ||
9a886586 | 846 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 847 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
848 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
849 | frames); | |
1edfb1af JB |
850 | } |
851 | } | |
852 | ||
853 | /* | |
854 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
855 | * the skb was added to the buffer longer than this time ago, the earlier | |
856 | * frames that have not yet been received are assumed to be lost and the skb | |
857 | * can be released for processing. This may also release other skb's from the | |
858 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
859 | * |
860 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
861 | */ |
862 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
863 | ||
d3b2fb53 | 864 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
865 | struct tid_ampdu_rx *tid_agg_rx, |
866 | struct sk_buff_head *frames) | |
aa0c8636 | 867 | { |
83eb935e | 868 | int index, i, j; |
aa0c8636 | 869 | |
dd318575 JB |
870 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
871 | ||
aa0c8636 | 872 | /* release the buffer until next missing frame */ |
2e3049b7 | 873 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 874 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 875 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
876 | /* |
877 | * No buffers ready to be released, but check whether any | |
878 | * frames in the reorder buffer have timed out. | |
879 | */ | |
aa0c8636 CL |
880 | int skipped = 1; |
881 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
882 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
883 | if (!ieee80211_rx_reorder_ready( |
884 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
885 | skipped++; |
886 | continue; | |
887 | } | |
499fe9a4 DH |
888 | if (skipped && |
889 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 890 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 891 | goto set_release_timer; |
aa0c8636 | 892 | |
83eb935e MK |
893 | /* don't leave incomplete A-MSDUs around */ |
894 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
895 | i = (i + 1) % tid_agg_rx->buf_size) | |
896 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
897 | ||
bdcbd8e0 JB |
898 | ht_dbg_ratelimited(sdata, |
899 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
900 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
901 | frames); | |
aa0c8636 CL |
902 | |
903 | /* | |
904 | * Increment the head seq# also for the skipped slots. | |
905 | */ | |
906 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
907 | (tid_agg_rx->head_seq_num + |
908 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
909 | skipped = 0; |
910 | } | |
83eb935e MK |
911 | } else while (ieee80211_rx_reorder_ready( |
912 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
913 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
914 | frames); | |
2e3049b7 | 915 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 916 | } |
2bff8ebf CL |
917 | |
918 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 919 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
920 | |
921 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
922 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
923 | if (ieee80211_rx_reorder_ready( |
924 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
925 | break; |
926 | } | |
927 | ||
928 | set_release_timer: | |
929 | ||
788211d8 JB |
930 | if (!tid_agg_rx->removed) |
931 | mod_timer(&tid_agg_rx->reorder_timer, | |
932 | tid_agg_rx->reorder_time[j] + 1 + | |
933 | HT_RX_REORDER_BUF_TIMEOUT); | |
2bff8ebf CL |
934 | } else { |
935 | del_timer(&tid_agg_rx->reorder_timer); | |
936 | } | |
aa0c8636 CL |
937 | } |
938 | ||
1edfb1af JB |
939 | /* |
940 | * As this function belongs to the RX path it must be under | |
941 | * rcu_read_lock protection. It returns false if the frame | |
942 | * can be processed immediately, true if it was consumed. | |
943 | */ | |
d3b2fb53 | 944 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 945 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
946 | struct sk_buff *skb, |
947 | struct sk_buff_head *frames) | |
1edfb1af JB |
948 | { |
949 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 950 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
951 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
952 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
953 | u16 head_seq_num, buf_size; | |
954 | int index; | |
2bff8ebf | 955 | bool ret = true; |
1edfb1af | 956 | |
dd318575 JB |
957 | spin_lock(&tid_agg_rx->reorder_lock); |
958 | ||
4549cf2b MK |
959 | /* |
960 | * Offloaded BA sessions have no known starting sequence number so pick | |
961 | * one from first Rxed frame for this tid after BA was started. | |
962 | */ | |
963 | if (unlikely(tid_agg_rx->auto_seq)) { | |
964 | tid_agg_rx->auto_seq = false; | |
965 | tid_agg_rx->ssn = mpdu_seq_num; | |
966 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
967 | } | |
968 | ||
1edfb1af JB |
969 | buf_size = tid_agg_rx->buf_size; |
970 | head_seq_num = tid_agg_rx->head_seq_num; | |
971 | ||
972 | /* frame with out of date sequence number */ | |
9a886586 | 973 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 974 | dev_kfree_skb(skb); |
2bff8ebf | 975 | goto out; |
1edfb1af JB |
976 | } |
977 | ||
978 | /* | |
979 | * If frame the sequence number exceeds our buffering window | |
980 | * size release some previous frames to make room for this one. | |
981 | */ | |
9a886586 JB |
982 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
983 | head_seq_num = ieee80211_sn_inc( | |
984 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 985 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 986 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 987 | head_seq_num, frames); |
1edfb1af JB |
988 | } |
989 | ||
990 | /* Now the new frame is always in the range of the reordering buffer */ | |
991 | ||
2e3049b7 | 992 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
993 | |
994 | /* check if we already stored this frame */ | |
83eb935e | 995 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 996 | dev_kfree_skb(skb); |
2bff8ebf | 997 | goto out; |
1edfb1af JB |
998 | } |
999 | ||
1000 | /* | |
1001 | * If the current MPDU is in the right order and nothing else | |
1002 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
1003 | * If it is first but there's something stored, we may be able |
1004 | * to release frames after this one. | |
1edfb1af JB |
1005 | */ |
1006 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
1007 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
1008 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
1009 | tid_agg_rx->head_seq_num = | |
1010 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
1011 | ret = false; |
1012 | goto out; | |
1edfb1af JB |
1013 | } |
1014 | ||
1015 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
1016 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
1017 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
1018 | tid_agg_rx->reorder_time[index] = jiffies; | |
1019 | tid_agg_rx->stored_mpdu_num++; | |
1020 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
1021 | } | |
1edfb1af | 1022 | |
2bff8ebf CL |
1023 | out: |
1024 | spin_unlock(&tid_agg_rx->reorder_lock); | |
1025 | return ret; | |
1edfb1af JB |
1026 | } |
1027 | ||
1028 | /* | |
1029 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
1030 | * true if the MPDU was buffered, false if it should be processed. | |
1031 | */ | |
f9e124fb CL |
1032 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
1033 | struct sk_buff_head *frames) | |
1edfb1af | 1034 | { |
2569a826 JB |
1035 | struct sk_buff *skb = rx->skb; |
1036 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 1037 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
2569a826 | 1038 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
1039 | struct tid_ampdu_rx *tid_agg_rx; |
1040 | u16 sc; | |
6cc00d54 | 1041 | u8 tid, ack_policy; |
1edfb1af | 1042 | |
051a41fa JB |
1043 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
1044 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 1045 | goto dont_reorder; |
1edfb1af JB |
1046 | |
1047 | /* | |
1048 | * filter the QoS data rx stream according to | |
1049 | * STA/TID and check if this STA/TID is on aggregation | |
1050 | */ | |
1051 | ||
1edfb1af | 1052 | if (!sta) |
2569a826 | 1053 | goto dont_reorder; |
1edfb1af | 1054 | |
6cc00d54 TP |
1055 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
1056 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
1057 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
1058 | ||
a87f736d JB |
1059 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
1060 | if (!tid_agg_rx) | |
1061 | goto dont_reorder; | |
1edfb1af JB |
1062 | |
1063 | /* qos null data frames are excluded */ | |
1064 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1065 | goto dont_reorder; |
1edfb1af | 1066 | |
6cc00d54 TP |
1067 | /* not part of a BA session */ |
1068 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1069 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1070 | goto dont_reorder; | |
1071 | ||
1edfb1af JB |
1072 | /* new, potentially un-ordered, ampdu frame - process it */ |
1073 | ||
1074 | /* reset session timer */ | |
1075 | if (tid_agg_rx->timeout) | |
12d3952f | 1076 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1077 | |
1078 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1079 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1080 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1081 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1082 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1083 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1084 | return; |
1edfb1af JB |
1085 | } |
1086 | ||
a87f736d JB |
1087 | /* |
1088 | * No locking needed -- we will only ever process one | |
1089 | * RX packet at a time, and thus own tid_agg_rx. All | |
1090 | * other code manipulating it needs to (and does) make | |
1091 | * sure that we cannot get to it any more before doing | |
1092 | * anything with it. | |
1093 | */ | |
f9e124fb CL |
1094 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1095 | frames)) | |
2569a826 JB |
1096 | return; |
1097 | ||
1098 | dont_reorder: | |
f9e124fb | 1099 | __skb_queue_tail(frames, skb); |
1edfb1af | 1100 | } |
33b64eb2 | 1101 | |
49461622 | 1102 | static ieee80211_rx_result debug_noinline |
0395442a | 1103 | ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) |
571ecf67 | 1104 | { |
a7767f95 | 1105 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1106 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1107 | |
6b0f3274 JB |
1108 | /* |
1109 | * Drop duplicate 802.11 retransmissions | |
1110 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1111 | */ | |
0395442a JB |
1112 | |
1113 | if (rx->skb->len < 24) | |
1114 | return RX_CONTINUE; | |
1115 | ||
1116 | if (ieee80211_is_ctl(hdr->frame_control) || | |
1117 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
1118 | is_multicast_ether_addr(hdr->addr1)) | |
1119 | return RX_CONTINUE; | |
1120 | ||
1121 | if (rx->sta) { | |
a7767f95 | 1122 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1123 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1124 | hdr->seq_ctrl)) { |
c206ca67 | 1125 | I802_DEBUG_INC(rx->local->dot11FrameDuplicateCount); |
5c90067c | 1126 | rx->sta->num_duplicates++; |
b1f93314 | 1127 | return RX_DROP_UNUSABLE; |
0cfcefef | 1128 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1129 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1130 | } |
571ecf67 JB |
1131 | } |
1132 | ||
0395442a JB |
1133 | return RX_CONTINUE; |
1134 | } | |
1135 | ||
1136 | static ieee80211_rx_result debug_noinline | |
1137 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) | |
1138 | { | |
1139 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
1140 | ||
571ecf67 JB |
1141 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1142 | * IEEE 802.11, Chap 5.5. | |
1143 | * | |
ccd7b362 JB |
1144 | * mac80211 filters only based on association state, i.e. it drops |
1145 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1146 | * deauth/disassoc frames when needed. In addition, hostapd is |
1147 | * responsible for filtering on both auth and assoc states. | |
1148 | */ | |
33b64eb2 | 1149 | |
902acc78 | 1150 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1151 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1152 | |
a7767f95 HH |
1153 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1154 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1155 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1156 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1157 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1158 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1159 | /* |
1160 | * accept port control frames from the AP even when it's not | |
1161 | * yet marked ASSOC to prevent a race where we don't set the | |
1162 | * assoc bit quickly enough before it sends the first frame | |
1163 | */ | |
1164 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1165 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1166 | unsigned int hdrlen; |
1167 | __be16 ethertype; | |
1168 | ||
1169 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1170 | ||
1171 | if (rx->skb->len < hdrlen + 8) | |
1172 | return RX_DROP_MONITOR; | |
1173 | ||
1174 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1175 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1176 | return RX_CONTINUE; |
1177 | } | |
21fc7560 JB |
1178 | |
1179 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1180 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1181 | hdr->addr2, | |
1182 | GFP_ATOMIC)) | |
1183 | return RX_DROP_UNUSABLE; | |
1184 | ||
e4c26add | 1185 | return RX_DROP_MONITOR; |
2a33bee2 | 1186 | } |
571ecf67 | 1187 | |
9ae54c84 | 1188 | return RX_CONTINUE; |
570bd537 JB |
1189 | } |
1190 | ||
1191 | ||
572e0012 KV |
1192 | static ieee80211_rx_result debug_noinline |
1193 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1194 | { | |
1195 | struct ieee80211_local *local; | |
1196 | struct ieee80211_hdr *hdr; | |
1197 | struct sk_buff *skb; | |
1198 | ||
1199 | local = rx->local; | |
1200 | skb = rx->skb; | |
1201 | hdr = (struct ieee80211_hdr *) skb->data; | |
1202 | ||
1203 | if (!local->pspolling) | |
1204 | return RX_CONTINUE; | |
1205 | ||
1206 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1207 | /* this is not from AP */ | |
1208 | return RX_CONTINUE; | |
1209 | ||
1210 | if (!ieee80211_is_data(hdr->frame_control)) | |
1211 | return RX_CONTINUE; | |
1212 | ||
1213 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1214 | /* AP has no more frames buffered for us */ | |
1215 | local->pspolling = false; | |
1216 | return RX_CONTINUE; | |
1217 | } | |
1218 | ||
1219 | /* more data bit is set, let's request a new frame from the AP */ | |
1220 | ieee80211_send_pspoll(local, rx->sdata); | |
1221 | ||
1222 | return RX_CONTINUE; | |
1223 | } | |
1224 | ||
d012a605 | 1225 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1226 | { |
133b8226 | 1227 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1228 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1229 | struct ps_data *ps; |
ba8c3d6f | 1230 | int tid; |
0795af57 | 1231 | |
d012a605 MP |
1232 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1233 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1234 | ps = &sdata->bss->ps; | |
1235 | else | |
1236 | return; | |
1237 | ||
1238 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1239 | set_sta_flag(sta, WLAN_STA_PS_STA); |
30686bf7 | 1240 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1241 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
bdcbd8e0 JB |
1242 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1243 | sta->sta.addr, sta->sta.aid); | |
ba8c3d6f | 1244 | |
17c18bf8 JB |
1245 | ieee80211_clear_fast_xmit(sta); |
1246 | ||
ba8c3d6f FF |
1247 | if (!sta->sta.txq[0]) |
1248 | return; | |
1249 | ||
1250 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
1251 | struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); | |
1252 | ||
1253 | if (!skb_queue_len(&txqi->queue)) | |
1254 | set_bit(tid, &sta->txq_buffered_tids); | |
1255 | else | |
1256 | clear_bit(tid, &sta->txq_buffered_tids); | |
1257 | } | |
571ecf67 JB |
1258 | } |
1259 | ||
d012a605 | 1260 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1261 | { |
bdcbd8e0 JB |
1262 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1263 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1264 | |
c2c98fde | 1265 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1266 | /* |
1267 | * Clear the flag only if the other one is still set | |
1268 | * so that the TX path won't start TX'ing new frames | |
1269 | * directly ... In the case that the driver flag isn't | |
1270 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1271 | */ | |
1272 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1273 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1274 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1275 | return; |
1276 | } | |
1277 | ||
5ac2e350 JB |
1278 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1279 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1280 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1281 | } |
1282 | ||
cf47161a | 1283 | int ieee80211_sta_ps_transition(struct ieee80211_sta *pubsta, bool start) |
d057e5a3 | 1284 | { |
cf47161a | 1285 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
d057e5a3 AN |
1286 | bool in_ps; |
1287 | ||
cf47161a | 1288 | WARN_ON(!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS)); |
d057e5a3 AN |
1289 | |
1290 | /* Don't let the same PS state be set twice */ | |
cf47161a | 1291 | in_ps = test_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1292 | if ((start && in_ps) || (!start && !in_ps)) |
1293 | return -EINVAL; | |
1294 | ||
1295 | if (start) | |
cf47161a | 1296 | sta_ps_start(sta); |
d057e5a3 | 1297 | else |
cf47161a | 1298 | sta_ps_end(sta); |
d057e5a3 AN |
1299 | |
1300 | return 0; | |
1301 | } | |
1302 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1303 | ||
47086fc5 JB |
1304 | static ieee80211_rx_result debug_noinline |
1305 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1306 | { | |
1307 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1308 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1309 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1310 | int tid, ac; | |
1311 | ||
5c90067c | 1312 | if (!rx->sta) |
47086fc5 JB |
1313 | return RX_CONTINUE; |
1314 | ||
1315 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1316 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1317 | return RX_CONTINUE; | |
1318 | ||
1319 | /* | |
1320 | * The device handles station powersave, so don't do anything about | |
1321 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1322 | * it to mac80211 since they're handled.) | |
1323 | */ | |
30686bf7 | 1324 | if (ieee80211_hw_check(&sdata->local->hw, AP_LINK_PS)) |
47086fc5 JB |
1325 | return RX_CONTINUE; |
1326 | ||
1327 | /* | |
1328 | * Don't do anything if the station isn't already asleep. In | |
1329 | * the uAPSD case, the station will probably be marked asleep, | |
1330 | * in the PS-Poll case the station must be confused ... | |
1331 | */ | |
c2c98fde | 1332 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1333 | return RX_CONTINUE; |
1334 | ||
1335 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1336 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1337 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1338 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1339 | else | |
c2c98fde | 1340 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1341 | } |
47086fc5 JB |
1342 | |
1343 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1344 | * count as an dropped frame. */ | |
1345 | dev_kfree_skb(rx->skb); | |
1346 | ||
1347 | return RX_QUEUED; | |
1348 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1349 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1350 | ieee80211_has_pm(hdr->frame_control) && | |
1351 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1352 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1353 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1354 | ac = ieee802_1d_to_ac[tid & 7]; | |
1355 | ||
1356 | /* | |
1357 | * If this AC is not trigger-enabled do nothing. | |
1358 | * | |
1359 | * NB: This could/should check a separate bitmap of trigger- | |
1360 | * enabled queues, but for now we only implement uAPSD w/o | |
1361 | * TSPEC changes to the ACs, so they're always the same. | |
1362 | */ | |
1363 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1364 | return RX_CONTINUE; | |
1365 | ||
1366 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1367 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1368 | return RX_CONTINUE; |
1369 | ||
c2c98fde | 1370 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1371 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1372 | else | |
c2c98fde | 1373 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1374 | } |
1375 | ||
1376 | return RX_CONTINUE; | |
1377 | } | |
1378 | ||
49461622 | 1379 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1380 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1381 | { |
1382 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1383 | struct sk_buff *skb = rx->skb; |
1384 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1385 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1386 | int i; |
571ecf67 JB |
1387 | |
1388 | if (!sta) | |
9ae54c84 | 1389 | return RX_CONTINUE; |
571ecf67 | 1390 | |
b291ba11 JB |
1391 | /* |
1392 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1393 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1394 | * current IBSS network alive in cases where other STAs start | |
1395 | * using different BSSID. This will also give the station another | |
1396 | * chance to restart the authentication/authorization in case | |
1397 | * something went wrong the first time. | |
b291ba11 | 1398 | */ |
05c914fe | 1399 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1400 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1401 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1402 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1403 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1404 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1405 | if (ieee80211_is_data(hdr->frame_control) && |
1406 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1407 | sta->last_rx_rate_idx = status->rate_idx; |
1408 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1409 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1410 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1411 | } |
1412 | } | |
239281f8 | 1413 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
6fe3eac7 | 1414 | sta->last_rx = jiffies; |
b291ba11 JB |
1415 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1416 | /* | |
33b64eb2 LCC |
1417 | * Mesh beacons will update last_rx when if they are found to |
1418 | * match the current local configuration when processed. | |
571ecf67 | 1419 | */ |
b291ba11 | 1420 | sta->last_rx = jiffies; |
3af6334c FF |
1421 | if (ieee80211_is_data(hdr->frame_control)) { |
1422 | sta->last_rx_rate_idx = status->rate_idx; | |
1423 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1424 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1425 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1426 | } |
571ecf67 JB |
1427 | } |
1428 | ||
3cf335d5 KV |
1429 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1430 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1431 | ||
571ecf67 JB |
1432 | sta->rx_fragments++; |
1433 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1434 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1435 | sta->last_signal = status->signal; | |
1436 | ewma_add(&sta->avg_signal, -status->signal); | |
1437 | } | |
571ecf67 | 1438 | |
ef0621e8 FF |
1439 | if (status->chains) { |
1440 | sta->chains = status->chains; | |
1441 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1442 | int signal = status->chain_signal[i]; | |
1443 | ||
1444 | if (!(status->chains & BIT(i))) | |
1445 | continue; | |
1446 | ||
1447 | sta->chain_signal_last[i] = signal; | |
1448 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1449 | } | |
1450 | } | |
1451 | ||
72eaa43a JB |
1452 | /* |
1453 | * Change STA power saving mode only at the end of a frame | |
1454 | * exchange sequence. | |
1455 | */ | |
30686bf7 | 1456 | if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) && |
d057e5a3 | 1457 | !ieee80211_has_morefrags(hdr->frame_control) && |
4cfda47b | 1458 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1459 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1460 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1461 | /* PM bit is only checked in frames where it isn't reserved, | |
1462 | * in AP mode it's reserved in non-bufferable management frames | |
1463 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1464 | */ | |
1465 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1466 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1467 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1468 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1469 | sta_ps_end(sta); |
72eaa43a JB |
1470 | } else { |
1471 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1472 | sta_ps_start(sta); |
72eaa43a | 1473 | } |
571ecf67 JB |
1474 | } |
1475 | ||
3f52b7e3 MP |
1476 | /* mesh power save support */ |
1477 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1478 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1479 | ||
22403def JB |
1480 | /* |
1481 | * Drop (qos-)data::nullfunc frames silently, since they | |
1482 | * are used only to control station power saving mode. | |
1483 | */ | |
1484 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1485 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1486 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1487 | |
1488 | /* | |
1489 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1490 | * that was not moved to a 4-addr STA vlan yet send |
1491 | * the event to userspace and for older hostapd drop | |
1492 | * the frame to the monitor interface. | |
d524215f FF |
1493 | */ |
1494 | if (ieee80211_has_a4(hdr->frame_control) && | |
1495 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1496 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1497 | !rx->sdata->u.vlan.sta))) { |
1498 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1499 | cfg80211_rx_unexpected_4addr_frame( | |
1500 | rx->sdata->dev, sta->sta.addr, | |
1501 | GFP_ATOMIC); | |
d524215f | 1502 | return RX_DROP_MONITOR; |
e7f4a940 | 1503 | } |
22403def JB |
1504 | /* |
1505 | * Update counter and free packet here to avoid | |
1506 | * counting this as a dropped packed. | |
1507 | */ | |
571ecf67 JB |
1508 | sta->rx_packets++; |
1509 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1510 | return RX_QUEUED; |
571ecf67 JB |
1511 | } |
1512 | ||
9ae54c84 | 1513 | return RX_CONTINUE; |
571ecf67 JB |
1514 | } /* ieee80211_rx_h_sta_process */ |
1515 | ||
86c228a7 JA |
1516 | static ieee80211_rx_result debug_noinline |
1517 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1518 | { | |
1519 | struct sk_buff *skb = rx->skb; | |
1520 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1521 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1522 | int keyidx; | |
1523 | int hdrlen; | |
1524 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1525 | struct ieee80211_key *sta_ptk = NULL; | |
1526 | int mmie_keyidx = -1; | |
1527 | __le16 fc; | |
2475b1cc | 1528 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1529 | |
1530 | /* | |
1531 | * Key selection 101 | |
1532 | * | |
1533 | * There are four types of keys: | |
1534 | * - GTK (group keys) | |
1535 | * - IGTK (group keys for management frames) | |
1536 | * - PTK (pairwise keys) | |
1537 | * - STK (station-to-station pairwise keys) | |
1538 | * | |
1539 | * When selecting a key, we have to distinguish between multicast | |
1540 | * (including broadcast) and unicast frames, the latter can only | |
1541 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1542 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1543 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1544 | * don't have a PTK/STK we check the key index for a WEP key. | |
1545 | * | |
1546 | * Note that in a regular BSS, multicast frames are sent by the | |
1547 | * AP only, associated stations unicast the frame to the AP first | |
1548 | * which then multicasts it on their behalf. | |
1549 | * | |
1550 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1551 | * with each station, that is something we don't currently handle. | |
1552 | * The spec seems to expect that one negotiates the same key with | |
1553 | * every station but there's no such requirement; VLANs could be | |
1554 | * possible. | |
1555 | */ | |
1556 | ||
86c228a7 JA |
1557 | /* start without a key */ |
1558 | rx->key = NULL; | |
2475b1cc | 1559 | fc = hdr->frame_control; |
86c228a7 | 1560 | |
2475b1cc MS |
1561 | if (rx->sta) { |
1562 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1563 | |
2475b1cc MS |
1564 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1565 | cs = rx->sta->cipher_scheme; | |
1566 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1567 | if (unlikely(keyid < 0)) | |
1568 | return RX_DROP_UNUSABLE; | |
1569 | } | |
1570 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1571 | } | |
86c228a7 JA |
1572 | |
1573 | if (!ieee80211_has_protected(fc)) | |
1574 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1575 | ||
1576 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1577 | rx->key = sta_ptk; | |
1578 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1579 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1580 | return RX_CONTINUE; | |
1581 | /* Skip decryption if the frame is not protected. */ | |
1582 | if (!ieee80211_has_protected(fc)) | |
1583 | return RX_CONTINUE; | |
1584 | } else if (mmie_keyidx >= 0) { | |
1585 | /* Broadcast/multicast robust management frame / BIP */ | |
1586 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1587 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1588 | return RX_CONTINUE; | |
1589 | ||
1590 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1591 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1592 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1593 | if (rx->sta) | |
1594 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1595 | if (!rx->key) | |
1596 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1597 | } else if (!ieee80211_has_protected(fc)) { | |
1598 | /* | |
1599 | * The frame was not protected, so skip decryption. However, we | |
1600 | * need to set rx->key if there is a key that could have been | |
1601 | * used so that the frame may be dropped if encryption would | |
1602 | * have been expected. | |
1603 | */ | |
1604 | struct ieee80211_key *key = NULL; | |
1605 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1606 | int i; | |
1607 | ||
1608 | if (ieee80211_is_mgmt(fc) && | |
1609 | is_multicast_ether_addr(hdr->addr1) && | |
1610 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1611 | rx->key = key; | |
1612 | else { | |
1613 | if (rx->sta) { | |
1614 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1615 | key = rcu_dereference(rx->sta->gtk[i]); | |
1616 | if (key) | |
1617 | break; | |
1618 | } | |
1619 | } | |
1620 | if (!key) { | |
1621 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1622 | key = rcu_dereference(sdata->keys[i]); | |
1623 | if (key) | |
1624 | break; | |
1625 | } | |
1626 | } | |
1627 | if (key) | |
1628 | rx->key = key; | |
1629 | } | |
1630 | return RX_CONTINUE; | |
1631 | } else { | |
1632 | u8 keyid; | |
2475b1cc | 1633 | |
86c228a7 JA |
1634 | /* |
1635 | * The device doesn't give us the IV so we won't be | |
1636 | * able to look up the key. That's ok though, we | |
1637 | * don't need to decrypt the frame, we just won't | |
1638 | * be able to keep statistics accurate. | |
1639 | * Except for key threshold notifications, should | |
1640 | * we somehow allow the driver to tell us which key | |
1641 | * the hardware used if this flag is set? | |
1642 | */ | |
1643 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1644 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1645 | return RX_CONTINUE; | |
1646 | ||
1647 | hdrlen = ieee80211_hdrlen(fc); | |
1648 | ||
2475b1cc MS |
1649 | if (cs) { |
1650 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1651 | |
2475b1cc MS |
1652 | if (unlikely(keyidx < 0)) |
1653 | return RX_DROP_UNUSABLE; | |
1654 | } else { | |
1655 | if (rx->skb->len < 8 + hdrlen) | |
1656 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1657 | /* | |
1658 | * no need to call ieee80211_wep_get_keyidx, | |
1659 | * it verifies a bunch of things we've done already | |
1660 | */ | |
1661 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1662 | keyidx = keyid >> 6; | |
1663 | } | |
86c228a7 JA |
1664 | |
1665 | /* check per-station GTK first, if multicast packet */ | |
1666 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1667 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1668 | ||
1669 | /* if not found, try default key */ | |
1670 | if (!rx->key) { | |
1671 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1672 | ||
1673 | /* | |
1674 | * RSNA-protected unicast frames should always be | |
1675 | * sent with pairwise or station-to-station keys, | |
1676 | * but for WEP we allow using a key index as well. | |
1677 | */ | |
1678 | if (rx->key && | |
1679 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1680 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1681 | !is_multicast_ether_addr(hdr->addr1)) | |
1682 | rx->key = NULL; | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | if (rx->key) { | |
1687 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1688 | return RX_DROP_MONITOR; | |
1689 | ||
1690 | rx->key->tx_rx_count++; | |
1691 | /* TODO: add threshold stuff again */ | |
1692 | } else { | |
1693 | return RX_DROP_MONITOR; | |
1694 | } | |
1695 | ||
1696 | switch (rx->key->conf.cipher) { | |
1697 | case WLAN_CIPHER_SUITE_WEP40: | |
1698 | case WLAN_CIPHER_SUITE_WEP104: | |
1699 | result = ieee80211_crypto_wep_decrypt(rx); | |
1700 | break; | |
1701 | case WLAN_CIPHER_SUITE_TKIP: | |
1702 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1703 | break; | |
1704 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db JM |
1705 | result = ieee80211_crypto_ccmp_decrypt( |
1706 | rx, IEEE80211_CCMP_MIC_LEN); | |
1707 | break; | |
1708 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1709 | result = ieee80211_crypto_ccmp_decrypt( | |
1710 | rx, IEEE80211_CCMP_256_MIC_LEN); | |
86c228a7 JA |
1711 | break; |
1712 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1713 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1714 | break; | |
56c52da2 JM |
1715 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1716 | result = ieee80211_crypto_aes_cmac_256_decrypt(rx); | |
1717 | break; | |
8ade538b JM |
1718 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1719 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1720 | result = ieee80211_crypto_aes_gmac_decrypt(rx); | |
1721 | break; | |
00b9cfa3 JM |
1722 | case WLAN_CIPHER_SUITE_GCMP: |
1723 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1724 | result = ieee80211_crypto_gcmp_decrypt(rx); | |
1725 | break; | |
86c228a7 | 1726 | default: |
2475b1cc | 1727 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1728 | } |
1729 | ||
1730 | /* the hdr variable is invalid after the decrypt handlers */ | |
1731 | ||
1732 | /* either the frame has been decrypted or will be dropped */ | |
1733 | status->flag |= RX_FLAG_DECRYPTED; | |
1734 | ||
1735 | return result; | |
1736 | } | |
1737 | ||
571ecf67 JB |
1738 | static inline struct ieee80211_fragment_entry * |
1739 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1740 | unsigned int frag, unsigned int seq, int rx_queue, | |
1741 | struct sk_buff **skb) | |
1742 | { | |
1743 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1744 | |
571ecf67 JB |
1745 | entry = &sdata->fragments[sdata->fragment_next++]; |
1746 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1747 | sdata->fragment_next = 0; | |
1748 | ||
bdcbd8e0 | 1749 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1750 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1751 | |
1752 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1753 | *skb = NULL; | |
1754 | entry->first_frag_time = jiffies; | |
1755 | entry->seq = seq; | |
1756 | entry->rx_queue = rx_queue; | |
1757 | entry->last_frag = frag; | |
1758 | entry->ccmp = 0; | |
1759 | entry->extra_len = 0; | |
1760 | ||
1761 | return entry; | |
1762 | } | |
1763 | ||
1764 | static inline struct ieee80211_fragment_entry * | |
1765 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1766 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1767 | int rx_queue, struct ieee80211_hdr *hdr) |
1768 | { | |
1769 | struct ieee80211_fragment_entry *entry; | |
1770 | int i, idx; | |
1771 | ||
1772 | idx = sdata->fragment_next; | |
1773 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1774 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1775 | |
1776 | idx--; | |
1777 | if (idx < 0) | |
1778 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1779 | ||
1780 | entry = &sdata->fragments[idx]; | |
1781 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1782 | entry->rx_queue != rx_queue || | |
1783 | entry->last_frag + 1 != frag) | |
1784 | continue; | |
1785 | ||
b73d70ad | 1786 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1787 | |
b73d70ad HH |
1788 | /* |
1789 | * Check ftype and addresses are equal, else check next fragment | |
1790 | */ | |
1791 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1792 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1793 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1794 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1795 | continue; |
1796 | ||
ab46623e | 1797 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1798 | __skb_queue_purge(&entry->skb_list); |
1799 | continue; | |
1800 | } | |
1801 | return entry; | |
1802 | } | |
1803 | ||
1804 | return NULL; | |
1805 | } | |
1806 | ||
49461622 | 1807 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1808 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1809 | { |
1810 | struct ieee80211_hdr *hdr; | |
1811 | u16 sc; | |
358c8d9d | 1812 | __le16 fc; |
571ecf67 JB |
1813 | unsigned int frag, seq; |
1814 | struct ieee80211_fragment_entry *entry; | |
1815 | struct sk_buff *skb; | |
554891e6 | 1816 | struct ieee80211_rx_status *status; |
571ecf67 | 1817 | |
b73d70ad | 1818 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1819 | fc = hdr->frame_control; |
f7fbf70e JC |
1820 | |
1821 | if (ieee80211_is_ctl(fc)) | |
1822 | return RX_CONTINUE; | |
1823 | ||
571ecf67 JB |
1824 | sc = le16_to_cpu(hdr->seq_ctrl); |
1825 | frag = sc & IEEE80211_SCTL_FRAG; | |
1826 | ||
b8fff407 | 1827 | if (is_multicast_ether_addr(hdr->addr1)) { |
c206ca67 | 1828 | I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount); |
d025933e | 1829 | goto out_no_led; |
571ecf67 | 1830 | } |
b8fff407 | 1831 | |
d025933e AM |
1832 | if (likely(!ieee80211_has_morefrags(fc) && frag == 0)) |
1833 | goto out; | |
1834 | ||
571ecf67 JB |
1835 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
1836 | ||
e3cf8b3f ZY |
1837 | if (skb_linearize(rx->skb)) |
1838 | return RX_DROP_UNUSABLE; | |
1839 | ||
058897a4 AK |
1840 | /* |
1841 | * skb_linearize() might change the skb->data and | |
1842 | * previously cached variables (in this case, hdr) need to | |
1843 | * be refreshed with the new data. | |
1844 | */ | |
1845 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1846 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1847 | ||
1848 | if (frag == 0) { | |
1849 | /* This is the first fragment of a new frame. */ | |
1850 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1851 | rx->seqno_idx, &(rx->skb)); |
2b2ba0db JM |
1852 | if (rx->key && |
1853 | (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP || | |
1854 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256) && | |
358c8d9d | 1855 | ieee80211_has_protected(fc)) { |
9e26297a | 1856 | int queue = rx->security_idx; |
571ecf67 JB |
1857 | /* Store CCMP PN so that we can verify that the next |
1858 | * fragment has a sequential PN value. */ | |
1859 | entry->ccmp = 1; | |
1860 | memcpy(entry->last_pn, | |
9190252c | 1861 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1862 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1863 | } |
9ae54c84 | 1864 | return RX_QUEUED; |
571ecf67 JB |
1865 | } |
1866 | ||
1867 | /* This is a fragment for a frame that should already be pending in | |
1868 | * fragment cache. Add this fragment to the end of the pending entry. | |
1869 | */ | |
9e26297a JB |
1870 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1871 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1872 | if (!entry) { |
1873 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1874 | return RX_DROP_MONITOR; |
571ecf67 JB |
1875 | } |
1876 | ||
1877 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1878 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1879 | if (entry->ccmp) { | |
1880 | int i; | |
4325f6ca | 1881 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1882 | int queue; |
2b2ba0db JM |
1883 | if (!rx->key || |
1884 | (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP && | |
1885 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256)) | |
e4c26add | 1886 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1887 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1888 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1889 | pn[i]++; |
1890 | if (pn[i]) | |
1891 | break; | |
1892 | } | |
9e26297a | 1893 | queue = rx->security_idx; |
9190252c | 1894 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1895 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1896 | return RX_DROP_UNUSABLE; |
4325f6ca | 1897 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1898 | } |
1899 | ||
358c8d9d | 1900 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1901 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1902 | entry->last_frag = frag; | |
1903 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1904 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1905 | rx->skb = NULL; |
9ae54c84 | 1906 | return RX_QUEUED; |
571ecf67 JB |
1907 | } |
1908 | ||
1909 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1910 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
f1160434 | 1911 | I802_DEBUG_INC(rx->local->rx_expand_skb_head_defrag); |
571ecf67 JB |
1912 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
1913 | GFP_ATOMIC))) { | |
1914 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1915 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1916 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1917 | } |
1918 | } | |
1919 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1920 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1921 | dev_kfree_skb(skb); | |
1922 | } | |
1923 | ||
1924 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1925 | status = IEEE80211_SKB_RXCB(rx->skb); |
1926 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1927 | |
1928 | out: | |
d025933e AM |
1929 | ieee80211_led_rx(rx->local); |
1930 | out_no_led: | |
571ecf67 JB |
1931 | if (rx->sta) |
1932 | rx->sta->rx_packets++; | |
9ae54c84 | 1933 | return RX_CONTINUE; |
571ecf67 JB |
1934 | } |
1935 | ||
1df332e8 | 1936 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1937 | { |
1df332e8 | 1938 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1939 | return -EACCES; |
571ecf67 | 1940 | |
76ee65bf | 1941 | return 0; |
571ecf67 JB |
1942 | } |
1943 | ||
1df332e8 | 1944 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1945 | { |
eb9fb5b8 JB |
1946 | struct sk_buff *skb = rx->skb; |
1947 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1948 | ||
3017b80b | 1949 | /* |
7848ba7d JB |
1950 | * Pass through unencrypted frames if the hardware has |
1951 | * decrypted them already. | |
3017b80b | 1952 | */ |
eb9fb5b8 | 1953 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1954 | return 0; |
571ecf67 JB |
1955 | |
1956 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1957 | if (unlikely(!ieee80211_has_protected(fc) && |
1958 | !ieee80211_is_nullfunc(fc) && | |
e8f4fb7c | 1959 | ieee80211_is_data(fc) && rx->key)) |
76ee65bf | 1960 | return -EACCES; |
bef5d1c7 JB |
1961 | |
1962 | return 0; | |
1963 | } | |
1964 | ||
1df332e8 | 1965 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1966 | { |
1967 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1968 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1969 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1970 | |
e3efca0a JM |
1971 | /* |
1972 | * Pass through unencrypted frames if the hardware has | |
1973 | * decrypted them already. | |
1974 | */ | |
1975 | if (status->flag & RX_FLAG_DECRYPTED) | |
1976 | return 0; | |
bef5d1c7 | 1977 | |
c2c98fde | 1978 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1979 | if (unlikely(!ieee80211_has_protected(fc) && |
1980 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1981 | rx->key)) { |
6ff57cf8 JB |
1982 | if (ieee80211_is_deauth(fc) || |
1983 | ieee80211_is_disassoc(fc)) | |
1984 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1985 | rx->skb->data, | |
1986 | rx->skb->len); | |
f2ca3ea4 | 1987 | return -EACCES; |
cf4e594e | 1988 | } |
f2ca3ea4 | 1989 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1990 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1991 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1992 | if (ieee80211_is_deauth(fc) || |
1993 | ieee80211_is_disassoc(fc)) | |
1994 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1995 | rx->skb->data, | |
1996 | rx->skb->len); | |
f2ca3ea4 | 1997 | return -EACCES; |
cf4e594e | 1998 | } |
f2ca3ea4 JM |
1999 | /* |
2000 | * When using MFP, Action frames are not allowed prior to | |
2001 | * having configured keys. | |
2002 | */ | |
2003 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 2004 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
2005 | return -EACCES; |
2006 | } | |
b3fc9c6c | 2007 | |
76ee65bf | 2008 | return 0; |
571ecf67 JB |
2009 | } |
2010 | ||
76ee65bf | 2011 | static int |
4114fa21 | 2012 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 2013 | { |
eb9fb5b8 | 2014 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 2015 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
2016 | bool check_port_control = false; |
2017 | struct ethhdr *ehdr; | |
2018 | int ret; | |
f14543ee | 2019 | |
4114fa21 | 2020 | *port_control = false; |
9bc383de JB |
2021 | if (ieee80211_has_a4(hdr->frame_control) && |
2022 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 2023 | return -1; |
9bc383de | 2024 | |
fbb327c5 FF |
2025 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
2026 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
2027 | ||
2028 | if (!sdata->u.mgd.use_4addr) | |
2029 | return -1; | |
2030 | else | |
2031 | check_port_control = true; | |
2032 | } | |
2033 | ||
9bc383de | 2034 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 2035 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 2036 | return -1; |
571ecf67 | 2037 | |
fbb327c5 | 2038 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 2039 | if (ret < 0) |
fbb327c5 FF |
2040 | return ret; |
2041 | ||
2042 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
2043 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
2044 | *port_control = true; | |
2045 | else if (check_port_control) | |
fbb327c5 FF |
2046 | return -1; |
2047 | ||
2048 | return 0; | |
76ee65bf | 2049 | } |
571ecf67 | 2050 | |
ce3edf6d JB |
2051 | /* |
2052 | * requires that rx->skb is a frame with ethernet header | |
2053 | */ | |
358c8d9d | 2054 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 2055 | { |
c97c23e3 | 2056 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
2057 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
2058 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
2059 | ||
2060 | /* | |
2061 | * Allow EAPOL frames to us/the PAE group address regardless | |
2062 | * of whether the frame was encrypted or not. | |
2063 | */ | |
a621fa4d | 2064 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
2065 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
2066 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
2067 | return true; |
2068 | ||
2069 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 2070 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
2071 | return false; |
2072 | ||
2073 | return true; | |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * requires that rx->skb is a frame with ethernet header | |
2078 | */ | |
76ee65bf | 2079 | static void |
5cf121c3 | 2080 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2081 | { |
eb9fb5b8 JB |
2082 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2083 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2084 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2085 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2086 | struct sta_info *dsta; | |
571ecf67 | 2087 | |
76ee65bf RR |
2088 | skb = rx->skb; |
2089 | xmit_skb = NULL; | |
571ecf67 | 2090 | |
5a490510 JB |
2091 | ieee80211_rx_stats(dev, skb->len); |
2092 | ||
05c914fe JB |
2093 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2094 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2095 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
9bc383de | 2096 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
2097 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
2098 | /* | |
2099 | * send multicast frames both to higher layers in | |
2100 | * local net stack and back to the wireless medium | |
2101 | */ | |
76ee65bf | 2102 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2103 | if (!xmit_skb) |
bdcbd8e0 | 2104 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2105 | dev->name); |
571ecf67 | 2106 | } else { |
abe60632 JB |
2107 | dsta = sta_info_get(sdata, skb->data); |
2108 | if (dsta) { | |
ce3edf6d JB |
2109 | /* |
2110 | * The destination station is associated to | |
2111 | * this AP (in this VLAN), so send the frame | |
2112 | * directly to it and do not pass it to local | |
2113 | * net stack. | |
571ecf67 | 2114 | */ |
76ee65bf | 2115 | xmit_skb = skb; |
571ecf67 JB |
2116 | skb = NULL; |
2117 | } | |
571ecf67 JB |
2118 | } |
2119 | } | |
2120 | ||
59d9cb07 | 2121 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2122 | if (skb) { |
2123 | /* 'align' will only take the values 0 or 2 here since all | |
2124 | * frames are required to be aligned to 2-byte boundaries | |
2125 | * when being passed to mac80211; the code here works just | |
2126 | * as well if that isn't true, but mac80211 assumes it can | |
2127 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2128 | */ |
9e890a1f JB |
2129 | int align; |
2130 | ||
2131 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2132 | if (align) { |
2133 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2134 | dev_kfree_skb(skb); | |
2135 | skb = NULL; | |
2136 | } else { | |
2137 | u8 *data = skb->data; | |
8ce0b589 ZY |
2138 | size_t len = skb_headlen(skb); |
2139 | skb->data -= align; | |
2140 | memmove(skb->data, data, len); | |
2141 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2142 | } |
2143 | } | |
9e890a1f | 2144 | } |
d1c3a37c JB |
2145 | #endif |
2146 | ||
9e890a1f JB |
2147 | if (skb) { |
2148 | /* deliver to local stack */ | |
2149 | skb->protocol = eth_type_trans(skb, dev); | |
2150 | memset(skb->cb, 0, sizeof(skb->cb)); | |
22d3a3c8 JB |
2151 | if (!(rx->flags & IEEE80211_RX_REORDER_TIMER) && |
2152 | rx->local->napi) | |
06d181a8 JB |
2153 | napi_gro_receive(rx->local->napi, skb); |
2154 | else | |
2155 | netif_receive_skb(skb); | |
571ecf67 JB |
2156 | } |
2157 | ||
76ee65bf | 2158 | if (xmit_skb) { |
aef6c928 HS |
2159 | /* |
2160 | * Send to wireless media and increase priority by 256 to | |
2161 | * keep the received priority instead of reclassifying | |
2162 | * the frame (see cfg80211_classify8021d). | |
2163 | */ | |
2164 | xmit_skb->priority += 256; | |
f831e909 | 2165 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2166 | skb_reset_network_header(xmit_skb); |
2167 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2168 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2169 | } |
76ee65bf RR |
2170 | } |
2171 | ||
49461622 | 2172 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2173 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2174 | { |
eb9fb5b8 | 2175 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2176 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2177 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2178 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2179 | struct sk_buff_head frame_list; |
554891e6 | 2180 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2181 | |
358c8d9d | 2182 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2183 | return RX_CONTINUE; |
fd4c7f2f | 2184 | |
358c8d9d | 2185 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2186 | return RX_DROP_MONITOR; |
fd4c7f2f | 2187 | |
554891e6 | 2188 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2189 | return RX_CONTINUE; |
fd4c7f2f | 2190 | |
eaf85ca7 ZY |
2191 | if (ieee80211_has_a4(hdr->frame_control) && |
2192 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2193 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2194 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2195 | |
eaf85ca7 ZY |
2196 | if (is_multicast_ether_addr(hdr->addr1) && |
2197 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2198 | rx->sdata->u.vlan.sta) || | |
2199 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2200 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2201 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2202 | |
eaf85ca7 ZY |
2203 | skb->dev = dev; |
2204 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2205 | |
e3cf8b3f ZY |
2206 | if (skb_linearize(skb)) |
2207 | return RX_DROP_UNUSABLE; | |
2208 | ||
eaf85ca7 ZY |
2209 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2210 | rx->sdata->vif.type, | |
8b3becad | 2211 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2212 | |
eaf85ca7 ZY |
2213 | while (!skb_queue_empty(&frame_list)) { |
2214 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2215 | |
358c8d9d | 2216 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2217 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2218 | continue; |
2219 | } | |
fd4c7f2f RR |
2220 | |
2221 | ieee80211_deliver_skb(rx); | |
2222 | } | |
2223 | ||
9ae54c84 | 2224 | return RX_QUEUED; |
fd4c7f2f RR |
2225 | } |
2226 | ||
bf94e17b | 2227 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2228 | static ieee80211_rx_result |
e32f85f7 LCC |
2229 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2230 | { | |
30789eb6 TP |
2231 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2232 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2233 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2234 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2235 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2236 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
30789eb6 | 2237 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2238 | u16 q, hdrlen; |
e32f85f7 LCC |
2239 | |
2240 | hdr = (struct ieee80211_hdr *) skb->data; | |
2241 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2242 | |
2243 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2244 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2245 | return RX_DROP_MONITOR; | |
2246 | ||
2247 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2248 | ||
2249 | /* make sure full mesh header is there, also checks skb len */ | |
2250 | if (!pskb_may_pull(rx->skb, | |
2251 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2252 | return RX_DROP_MONITOR; | |
2253 | ||
2254 | /* reload pointers */ | |
2255 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2256 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2257 | ||
d0c22119 BC |
2258 | if (ieee80211_drop_unencrypted(rx, hdr->frame_control)) |
2259 | return RX_DROP_MONITOR; | |
2260 | ||
2157fdd6 TP |
2261 | /* frame is in RMC, don't forward */ |
2262 | if (ieee80211_is_data(hdr->frame_control) && | |
2263 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2264 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2265 | return RX_DROP_MONITOR; |
2266 | ||
5c90067c | 2267 | if (!ieee80211_is_data(hdr->frame_control)) |
e32f85f7 LCC |
2268 | return RX_CONTINUE; |
2269 | ||
2270 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2271 | return RX_DROP_MONITOR; |
2272 | ||
43b7b314 | 2273 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2274 | struct mesh_path *mppath; |
43b7b314 JC |
2275 | char *proxied_addr; |
2276 | char *mpp_addr; | |
2277 | ||
2278 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2279 | mpp_addr = hdr->addr3; | |
2280 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2281 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2282 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2283 | mpp_addr = hdr->addr4; |
2284 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2285 | } else { |
2286 | return RX_DROP_MONITOR; | |
43b7b314 | 2287 | } |
79617dee | 2288 | |
79617dee | 2289 | rcu_read_lock(); |
bf7cd94d | 2290 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2291 | if (!mppath) { |
bf7cd94d | 2292 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2293 | } else { |
2294 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2295 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2296 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2297 | spin_unlock_bh(&mppath->state_lock); |
2298 | } | |
2299 | rcu_read_unlock(); | |
2300 | } | |
2301 | ||
3c5772a5 JC |
2302 | /* Frame has reached destination. Don't forward */ |
2303 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2304 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2305 | return RX_CONTINUE; |
2306 | ||
00e96dec | 2307 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2308 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2309 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2310 | return RX_DROP_MONITOR; |
2311 | } | |
2312 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2313 | |
30789eb6 TP |
2314 | if (!--mesh_hdr->ttl) { |
2315 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2316 | goto out; |
30789eb6 TP |
2317 | } |
2318 | ||
d665508b CYY |
2319 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2320 | goto out; | |
2321 | ||
30789eb6 TP |
2322 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2323 | if (!fwd_skb) { | |
bdcbd8e0 | 2324 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2325 | sdata->name); |
30789eb6 TP |
2326 | goto out; |
2327 | } | |
2328 | ||
2329 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2330 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2331 | info = IEEE80211_SKB_CB(fwd_skb); |
2332 | memset(info, 0, sizeof(*info)); | |
2333 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2334 | info->control.vif = &rx->sdata->vif; | |
2335 | info->control.jiffies = jiffies; | |
2336 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2337 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2338 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2339 | /* update power mode indication when forwarding */ |
2340 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2341 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2342 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2343 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2344 | } else { | |
2345 | /* unable to resolve next hop */ | |
bf7cd94d | 2346 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2347 | fwd_hdr->addr3, 0, |
2348 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2349 | fwd_hdr->addr2); | |
30789eb6 | 2350 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2351 | kfree_skb(fwd_skb); |
30789eb6 | 2352 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2353 | } |
2354 | ||
30789eb6 TP |
2355 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2356 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2357 | out: |
df140465 | 2358 | if (is_multicast_ether_addr(hdr->addr1)) |
e32f85f7 | 2359 | return RX_CONTINUE; |
df140465 | 2360 | return RX_DROP_MONITOR; |
e32f85f7 | 2361 | } |
bf94e17b | 2362 | #endif |
e32f85f7 | 2363 | |
49461622 | 2364 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2365 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2366 | { |
eb9fb5b8 | 2367 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2368 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2369 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2370 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2371 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2372 | bool port_control; |
ce3edf6d | 2373 | int err; |
76ee65bf | 2374 | |
358c8d9d | 2375 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2376 | return RX_CONTINUE; |
76ee65bf | 2377 | |
358c8d9d | 2378 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2379 | return RX_DROP_MONITOR; |
76ee65bf | 2380 | |
79c892b8 | 2381 | if (rx->sta) { |
3d6dc343 | 2382 | /* The seqno index has the same property as needed |
79c892b8 JB |
2383 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS |
2384 | * for non-QoS-data frames. Here we know it's a data | |
2385 | * frame, so count MSDUs. | |
2386 | */ | |
3d6dc343 | 2387 | rx->sta->rx_msdu[rx->seqno_idx]++; |
79c892b8 JB |
2388 | } |
2389 | ||
f14543ee | 2390 | /* |
e7f4a940 JB |
2391 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2392 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2393 | */ |
2394 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2395 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2396 | if (rx->sta && | |
2397 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2398 | cfg80211_rx_unexpected_4addr_frame( | |
2399 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2400 | return RX_DROP_MONITOR; |
e7f4a940 | 2401 | } |
f14543ee | 2402 | |
4114fa21 | 2403 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2404 | if (unlikely(err)) |
e4c26add | 2405 | return RX_DROP_UNUSABLE; |
76ee65bf | 2406 | |
358c8d9d | 2407 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2408 | return RX_DROP_MONITOR; |
ce3edf6d | 2409 | |
8a4d32f3 AN |
2410 | /* directly handle TDLS channel switch requests/responses */ |
2411 | if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == | |
2412 | cpu_to_be16(ETH_P_TDLS))) { | |
2413 | struct ieee80211_tdls_data *tf = (void *)rx->skb->data; | |
2414 | ||
2415 | if (pskb_may_pull(rx->skb, | |
2416 | offsetof(struct ieee80211_tdls_data, u)) && | |
2417 | tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && | |
2418 | tf->category == WLAN_CATEGORY_TDLS && | |
2419 | (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || | |
2420 | tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { | |
2421 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TDLS_CHSW; | |
2422 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2423 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
2424 | if (rx->sta) | |
2425 | rx->sta->rx_packets++; | |
2426 | ||
2427 | return RX_QUEUED; | |
2428 | } | |
2429 | } | |
2430 | ||
4114fa21 FF |
2431 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2432 | unlikely(port_control) && sdata->bss) { | |
2433 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2434 | u.ap); | |
2435 | dev = sdata->dev; | |
2436 | rx->sdata = sdata; | |
2437 | } | |
2438 | ||
76ee65bf RR |
2439 | rx->skb->dev = dev; |
2440 | ||
08ca944e | 2441 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2442 | !is_multicast_ether_addr( |
2443 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2444 | (!local->scanning && | |
2445 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2446 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2447 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2448 | } | |
2449 | ||
76ee65bf | 2450 | ieee80211_deliver_skb(rx); |
571ecf67 | 2451 | |
9ae54c84 | 2452 | return RX_QUEUED; |
571ecf67 JB |
2453 | } |
2454 | ||
49461622 | 2455 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2456 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2457 | { |
71364716 | 2458 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2459 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2460 | struct tid_ampdu_rx *tid_agg_rx; |
2461 | u16 start_seq_num; | |
2462 | u16 tid; | |
2463 | ||
a7767f95 | 2464 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2465 | return RX_CONTINUE; |
71364716 | 2466 | |
a7767f95 | 2467 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2468 | struct { |
2469 | __le16 control, start_seq_num; | |
2470 | } __packed bar_data; | |
6382246e EG |
2471 | struct ieee80211_event event = { |
2472 | .type = BAR_RX_EVENT, | |
2473 | }; | |
8ae5977f | 2474 | |
71364716 | 2475 | if (!rx->sta) |
a02ae758 | 2476 | return RX_DROP_MONITOR; |
8ae5977f JB |
2477 | |
2478 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2479 | &bar_data, sizeof(bar_data))) | |
2480 | return RX_DROP_MONITOR; | |
2481 | ||
8ae5977f | 2482 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2483 | |
2484 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2485 | if (!tid_agg_rx) | |
a02ae758 | 2486 | return RX_DROP_MONITOR; |
71364716 | 2487 | |
8ae5977f | 2488 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
6382246e EG |
2489 | event.u.ba.tid = tid; |
2490 | event.u.ba.ssn = start_seq_num; | |
2491 | event.u.ba.sta = &rx->sta->sta; | |
71364716 RR |
2492 | |
2493 | /* reset session timer */ | |
20ad19d0 JB |
2494 | if (tid_agg_rx->timeout) |
2495 | mod_timer(&tid_agg_rx->session_timer, | |
2496 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2497 | |
dd318575 | 2498 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2499 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2500 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2501 | start_seq_num, frames); |
dd318575 JB |
2502 | spin_unlock(&tid_agg_rx->reorder_lock); |
2503 | ||
6382246e EG |
2504 | drv_event_callback(rx->local, rx->sdata, &event); |
2505 | ||
a02ae758 JB |
2506 | kfree_skb(skb); |
2507 | return RX_QUEUED; | |
71364716 RR |
2508 | } |
2509 | ||
08daecae JB |
2510 | /* |
2511 | * After this point, we only want management frames, | |
2512 | * so we can drop all remaining control frames to | |
2513 | * cooked monitor interfaces. | |
2514 | */ | |
2515 | return RX_DROP_MONITOR; | |
71364716 RR |
2516 | } |
2517 | ||
f4f727a6 JM |
2518 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2519 | struct ieee80211_mgmt *mgmt, | |
2520 | size_t len) | |
fea14732 JM |
2521 | { |
2522 | struct ieee80211_local *local = sdata->local; | |
2523 | struct sk_buff *skb; | |
2524 | struct ieee80211_mgmt *resp; | |
2525 | ||
b203ca39 | 2526 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2527 | /* Not to own unicast address */ |
2528 | return; | |
2529 | } | |
2530 | ||
b203ca39 JP |
2531 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2532 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2533 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2534 | return; |
2535 | } | |
2536 | ||
2537 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2538 | /* Too short SA Query request frame */ | |
2539 | return; | |
2540 | } | |
2541 | ||
2542 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2543 | if (skb == NULL) | |
2544 | return; | |
2545 | ||
2546 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2547 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2548 | memset(resp, 0, 24); | |
2549 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2550 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2551 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2552 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2553 | IEEE80211_STYPE_ACTION); | |
2554 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2555 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2556 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2557 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2558 | mgmt->u.action.u.sa_query.trans_id, | |
2559 | WLAN_SA_QUERY_TR_ID_LEN); | |
2560 | ||
62ae67be | 2561 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2562 | } |
2563 | ||
2e161f78 JB |
2564 | static ieee80211_rx_result debug_noinline |
2565 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2566 | { | |
2567 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2568 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2569 | |
2570 | /* | |
2571 | * From here on, look only at management frames. | |
2572 | * Data and control frames are already handled, | |
2573 | * and unknown (reserved) frames are useless. | |
2574 | */ | |
2575 | if (rx->skb->len < 24) | |
2576 | return RX_DROP_MONITOR; | |
2577 | ||
2578 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2579 | return RX_DROP_MONITOR; | |
2580 | ||
ee971924 JB |
2581 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2582 | ieee80211_is_beacon(mgmt->frame_control) && | |
2583 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2584 | int sig = 0; |
2585 | ||
30686bf7 | 2586 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
2587 | sig = status->signal; |
2588 | ||
ee971924 JB |
2589 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2590 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2591 | status->freq, sig); |
ee971924 JB |
2592 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2593 | } | |
2594 | ||
2e161f78 JB |
2595 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
2596 | return RX_DROP_UNUSABLE; | |
2597 | ||
2598 | return RX_CONTINUE; | |
2599 | } | |
2600 | ||
de1ede7a JB |
2601 | static ieee80211_rx_result debug_noinline |
2602 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2603 | { | |
2604 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2605 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2606 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2607 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2608 | int len = rx->skb->len; |
2609 | ||
2610 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2611 | return RX_CONTINUE; | |
2612 | ||
026331c4 JM |
2613 | /* drop too small frames */ |
2614 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2615 | return RX_DROP_UNUSABLE; |
de1ede7a | 2616 | |
815b8092 | 2617 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2618 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2619 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2620 | return RX_DROP_UNUSABLE; |
de1ede7a | 2621 | |
de1ede7a | 2622 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2623 | case WLAN_CATEGORY_HT: |
2624 | /* reject HT action frames from stations not supporting HT */ | |
2625 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2626 | goto invalid; | |
2627 | ||
2628 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2629 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2630 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2631 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2632 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2633 | break; | |
2634 | ||
ec61cd63 | 2635 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2636 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2637 | goto invalid; | |
2638 | ||
2639 | switch (mgmt->u.action.u.ht_smps.action) { | |
2640 | case WLAN_HT_ACTION_SMPS: { | |
2641 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2642 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2643 | |
2644 | /* convert to HT capability */ | |
2645 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2646 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2647 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2648 | break; |
2649 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2650 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2651 | break; |
2652 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2653 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2654 | break; |
2655 | default: | |
2656 | goto invalid; | |
2657 | } | |
1d8d3dec JB |
2658 | |
2659 | /* if no change do nothing */ | |
af0ed69b | 2660 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2661 | goto handled; |
af0ed69b | 2662 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2663 | |
2664 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2665 | ||
64f68e5d JB |
2666 | rate_control_rate_update(local, sband, rx->sta, |
2667 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2668 | goto handled; |
2669 | } | |
ec61cd63 JB |
2670 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2671 | struct ieee80211_supported_band *sband; | |
2672 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
1c45c5ce | 2673 | enum ieee80211_sta_rx_bandwidth max_bw, new_bw; |
ec61cd63 JB |
2674 | |
2675 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2676 | if (!(rx->sta->sta.ht_cap.cap & |
2677 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2678 | goto handled; |
2679 | ||
e1a0c6b3 | 2680 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
1c45c5ce | 2681 | max_bw = IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 2682 | else |
1c45c5ce EP |
2683 | max_bw = ieee80211_sta_cap_rx_bw(rx->sta); |
2684 | ||
2685 | /* set cur_max_bandwidth and recalc sta bw */ | |
2686 | rx->sta->cur_max_bandwidth = max_bw; | |
2687 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2688 | |
e1a0c6b3 | 2689 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2690 | goto handled; |
2691 | ||
1c45c5ce | 2692 | rx->sta->sta.bandwidth = new_bw; |
ec61cd63 JB |
2693 | sband = rx->local->hw.wiphy->bands[status->band]; |
2694 | ||
2695 | rate_control_rate_update(local, sband, rx->sta, | |
2696 | IEEE80211_RC_BW_CHANGED); | |
2697 | goto handled; | |
2698 | } | |
1d8d3dec JB |
2699 | default: |
2700 | goto invalid; | |
2701 | } | |
2702 | ||
0af83d3d | 2703 | break; |
1b3a2e49 JB |
2704 | case WLAN_CATEGORY_PUBLIC: |
2705 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2706 | goto invalid; | |
2707 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2708 | break; | |
2709 | if (!rx->sta) | |
2710 | break; | |
2711 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2712 | break; | |
2713 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2714 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2715 | break; | |
2716 | if (len < offsetof(struct ieee80211_mgmt, | |
2717 | u.action.u.ext_chan_switch.variable)) | |
2718 | goto invalid; | |
2719 | goto queue; | |
0af83d3d JB |
2720 | case WLAN_CATEGORY_VHT: |
2721 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2722 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2723 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2724 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2725 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2726 | break; | |
2727 | ||
2728 | /* verify action code is present */ | |
2729 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2730 | goto invalid; | |
2731 | ||
2732 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2733 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2734 | u8 opmode; | |
2735 | ||
2736 | /* verify opmode is present */ | |
2737 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2738 | goto invalid; | |
2739 | ||
2740 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2741 | ||
2742 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2743 | opmode, status->band, |
2744 | false); | |
0af83d3d JB |
2745 | goto handled; |
2746 | } | |
2747 | default: | |
2748 | break; | |
2749 | } | |
1d8d3dec | 2750 | break; |
de1ede7a | 2751 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2752 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2753 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2754 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2755 | sdata->vif.type != NL80211_IFTYPE_AP && |
2756 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2757 | break; |
8abd3f9b | 2758 | |
026331c4 JM |
2759 | /* verify action_code is present */ |
2760 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2761 | break; | |
2762 | ||
de1ede7a JB |
2763 | switch (mgmt->u.action.u.addba_req.action_code) { |
2764 | case WLAN_ACTION_ADDBA_REQ: | |
2765 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2766 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2767 | goto invalid; |
2768 | break; | |
de1ede7a JB |
2769 | case WLAN_ACTION_ADDBA_RESP: |
2770 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2771 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2772 | goto invalid; |
2773 | break; | |
de1ede7a JB |
2774 | case WLAN_ACTION_DELBA: |
2775 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2776 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2777 | goto invalid; |
2778 | break; | |
2779 | default: | |
2780 | goto invalid; | |
de1ede7a | 2781 | } |
bed7ee6e | 2782 | |
8b58ff83 | 2783 | goto queue; |
39192c0b | 2784 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2785 | /* verify action_code is present */ |
2786 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2787 | break; | |
2788 | ||
39192c0b JB |
2789 | switch (mgmt->u.action.u.measurement.action_code) { |
2790 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2791 | if (status->band != IEEE80211_BAND_5GHZ) |
2792 | break; | |
2793 | ||
39192c0b JB |
2794 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2795 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2796 | break; |
cd7760e6 SW |
2797 | |
2798 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2799 | break; | |
2800 | ||
39192c0b | 2801 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2802 | goto handled; |
cd7760e6 SW |
2803 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2804 | u8 *bssid; | |
2805 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2806 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2807 | break; |
cc32abd4 | 2808 | |
cd7760e6 | 2809 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2810 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2811 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2812 | break; |
2813 | ||
2814 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2815 | bssid = sdata->u.mgd.bssid; | |
2816 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2817 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2818 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2819 | bssid = mgmt->sa; | |
cd7760e6 SW |
2820 | else |
2821 | break; | |
2822 | ||
2823 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2824 | break; |
c481ec97 | 2825 | |
8b58ff83 | 2826 | goto queue; |
cd7760e6 | 2827 | } |
39192c0b JB |
2828 | } |
2829 | break; | |
fea14732 JM |
2830 | case WLAN_CATEGORY_SA_QUERY: |
2831 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2832 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2833 | break; |
2834 | ||
fea14732 JM |
2835 | switch (mgmt->u.action.u.sa_query.action) { |
2836 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2837 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2838 | break; |
fea14732 | 2839 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2840 | goto handled; |
fea14732 JM |
2841 | } |
2842 | break; | |
8db09850 | 2843 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2844 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2845 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2846 | break; | |
2847 | ||
8db09850 TP |
2848 | switch (mgmt->u.action.u.self_prot.action_code) { |
2849 | case WLAN_SP_MESH_PEERING_OPEN: | |
2850 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2851 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2852 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2853 | goto invalid; | |
a6dad6a2 | 2854 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2855 | /* userspace handles this frame */ |
2856 | break; | |
2857 | goto queue; | |
2858 | case WLAN_SP_MGK_INFORM: | |
2859 | case WLAN_SP_MGK_ACK: | |
2860 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2861 | goto invalid; | |
2862 | break; | |
2863 | } | |
2864 | break; | |
d3aaec8a | 2865 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2866 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2867 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2868 | break; | |
2869 | ||
77a121c3 JB |
2870 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2871 | break; | |
25d49e4d | 2872 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2873 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2874 | break; |
2875 | goto queue; | |
84040805 | 2876 | } |
026331c4 | 2877 | |
2e161f78 JB |
2878 | return RX_CONTINUE; |
2879 | ||
bed7ee6e | 2880 | invalid: |
554891e6 | 2881 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2882 | /* will return in the next handlers */ |
2883 | return RX_CONTINUE; | |
2884 | ||
2885 | handled: | |
2886 | if (rx->sta) | |
2887 | rx->sta->rx_packets++; | |
2888 | dev_kfree_skb(rx->skb); | |
2889 | return RX_QUEUED; | |
2890 | ||
2891 | queue: | |
2892 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2893 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2894 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2895 | if (rx->sta) | |
2896 | rx->sta->rx_packets++; | |
2897 | return RX_QUEUED; | |
2898 | } | |
2899 | ||
2900 | static ieee80211_rx_result debug_noinline | |
2901 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2902 | { | |
554891e6 | 2903 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2904 | int sig = 0; |
2e161f78 JB |
2905 | |
2906 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2907 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2908 | return RX_CONTINUE; |
d7907448 | 2909 | |
026331c4 JM |
2910 | /* |
2911 | * Getting here means the kernel doesn't know how to handle | |
2912 | * it, but maybe userspace does ... include returned frames | |
2913 | * so userspace can register for those to know whether ones | |
2914 | * it transmitted were processed or returned. | |
2915 | */ | |
026331c4 | 2916 | |
30686bf7 | 2917 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
2918 | sig = status->signal; |
2919 | ||
71bbc994 | 2920 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2921 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 JB |
2922 | if (rx->sta) |
2923 | rx->sta->rx_packets++; | |
2924 | dev_kfree_skb(rx->skb); | |
2925 | return RX_QUEUED; | |
2926 | } | |
2927 | ||
2e161f78 JB |
2928 | return RX_CONTINUE; |
2929 | } | |
2930 | ||
2931 | static ieee80211_rx_result debug_noinline | |
2932 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2933 | { | |
2934 | struct ieee80211_local *local = rx->local; | |
2935 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2936 | struct sk_buff *nskb; | |
2937 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2938 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2939 | |
2940 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2941 | return RX_CONTINUE; | |
2942 | ||
2943 | /* | |
2944 | * For AP mode, hostapd is responsible for handling any action | |
2945 | * frames that we didn't handle, including returning unknown | |
2946 | * ones. For all other modes we will return them to the sender, | |
2947 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2948 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2949 | * Newer versions of hostapd shall also use the management frame |
2950 | * registration mechanisms, but older ones still use cooked | |
2951 | * monitor interfaces so push all frames there. | |
2952 | */ | |
554891e6 | 2953 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2954 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2955 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2956 | return RX_DROP_MONITOR; | |
026331c4 | 2957 | |
4b5ebccc JB |
2958 | if (is_multicast_ether_addr(mgmt->da)) |
2959 | return RX_DROP_MONITOR; | |
2960 | ||
84040805 JB |
2961 | /* do not return rejected action frames */ |
2962 | if (mgmt->u.action.category & 0x80) | |
2963 | return RX_DROP_UNUSABLE; | |
2964 | ||
2965 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2966 | GFP_ATOMIC); | |
2967 | if (nskb) { | |
292b4df6 | 2968 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2969 | |
292b4df6 JL |
2970 | nmgmt->u.action.category |= 0x80; |
2971 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2972 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2973 | |
2974 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2975 | ||
07e5a5f5 JB |
2976 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2977 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2978 | ||
2979 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2980 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2981 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
30686bf7 | 2982 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
07e5a5f5 JB |
2983 | info->hw_queue = |
2984 | local->hw.offchannel_tx_hw_queue; | |
2985 | } | |
2986 | ||
2987 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2988 | status->band); | |
de1ede7a | 2989 | } |
39192c0b JB |
2990 | dev_kfree_skb(rx->skb); |
2991 | return RX_QUEUED; | |
de1ede7a JB |
2992 | } |
2993 | ||
49461622 | 2994 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2995 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2996 | { |
eb9fb5b8 | 2997 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2998 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2999 | __le16 stype; | |
571ecf67 | 3000 | |
77a121c3 | 3001 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 3002 | |
77a121c3 JB |
3003 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
3004 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 3005 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
3006 | sdata->vif.type != NL80211_IFTYPE_STATION) |
3007 | return RX_DROP_MONITOR; | |
472dbc45 | 3008 | |
77a121c3 | 3009 | switch (stype) { |
66e67e41 | 3010 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
3011 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
3012 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
3013 | /* process for all: mesh, mlme, ibss */ | |
3014 | break; | |
66e67e41 JB |
3015 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
3016 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
3017 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
3018 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
3019 | if (is_multicast_ether_addr(mgmt->da) && |
3020 | !is_broadcast_ether_addr(mgmt->da)) | |
3021 | return RX_DROP_MONITOR; | |
3022 | ||
77a121c3 JB |
3023 | /* process only for station */ |
3024 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
3025 | return RX_DROP_MONITOR; | |
3026 | break; | |
3027 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
3028 | /* process only for ibss and mesh */ |
3029 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
3030 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
3031 | return RX_DROP_MONITOR; |
3032 | break; | |
3033 | default: | |
3034 | return RX_DROP_MONITOR; | |
3035 | } | |
f9d540ee | 3036 | |
77a121c3 | 3037 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 3038 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
3039 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
3040 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
3041 | if (rx->sta) |
3042 | rx->sta->rx_packets++; | |
46900298 | 3043 | |
77a121c3 | 3044 | return RX_QUEUED; |
571ecf67 JB |
3045 | } |
3046 | ||
5cf121c3 | 3047 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
3048 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
3049 | struct ieee80211_rate *rate) | |
3d30d949 MW |
3050 | { |
3051 | struct ieee80211_sub_if_data *sdata; | |
3052 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
3053 | struct sk_buff *skb = rx->skb, *skb2; |
3054 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 3055 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 3056 | int needed_headroom; |
3d30d949 | 3057 | |
554891e6 JB |
3058 | /* |
3059 | * If cooked monitor has been processed already, then | |
3060 | * don't do it again. If not, set the flag. | |
3061 | */ | |
3062 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 3063 | goto out_free_skb; |
554891e6 | 3064 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 3065 | |
152c477a JB |
3066 | /* If there are no cooked monitor interfaces, just free the SKB */ |
3067 | if (!local->cooked_mntrs) | |
3068 | goto out_free_skb; | |
3069 | ||
1f7bba79 JB |
3070 | /* vendor data is long removed here */ |
3071 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 3072 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 3073 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 3074 | |
293702a3 JB |
3075 | if (skb_headroom(skb) < needed_headroom && |
3076 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
3077 | goto out_free_skb; | |
3d30d949 | 3078 | |
293702a3 | 3079 | /* prepend radiotap information */ |
973ef21a FF |
3080 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
3081 | false); | |
3d30d949 MW |
3082 | |
3083 | skb_set_mac_header(skb, 0); | |
3084 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3085 | skb->pkt_type = PACKET_OTHERHOST; | |
3086 | skb->protocol = htons(ETH_P_802_2); | |
3087 | ||
3088 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 3089 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
3090 | continue; |
3091 | ||
05c914fe | 3092 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
3093 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
3094 | continue; | |
3095 | ||
3096 | if (prev_dev) { | |
3097 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3098 | if (skb2) { | |
3099 | skb2->dev = prev_dev; | |
5548a8a1 | 3100 | netif_receive_skb(skb2); |
3d30d949 MW |
3101 | } |
3102 | } | |
3103 | ||
3104 | prev_dev = sdata->dev; | |
5a490510 | 3105 | ieee80211_rx_stats(sdata->dev, skb->len); |
3d30d949 MW |
3106 | } |
3107 | ||
3108 | if (prev_dev) { | |
3109 | skb->dev = prev_dev; | |
5548a8a1 | 3110 | netif_receive_skb(skb); |
554891e6 JB |
3111 | return; |
3112 | } | |
3d30d949 MW |
3113 | |
3114 | out_free_skb: | |
3115 | dev_kfree_skb(skb); | |
3116 | } | |
3117 | ||
aa0c8636 CL |
3118 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3119 | ieee80211_rx_result res) | |
3120 | { | |
3121 | switch (res) { | |
3122 | case RX_DROP_MONITOR: | |
3123 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3124 | if (rx->sta) | |
3125 | rx->sta->rx_dropped++; | |
3126 | /* fall through */ | |
3127 | case RX_CONTINUE: { | |
3128 | struct ieee80211_rate *rate = NULL; | |
3129 | struct ieee80211_supported_band *sband; | |
3130 | struct ieee80211_rx_status *status; | |
3131 | ||
3132 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3133 | ||
3134 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3135 | if (!(status->flag & RX_FLAG_HT) && |
3136 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3137 | rate = &sband->bitrates[status->rate_idx]; |
3138 | ||
3139 | ieee80211_rx_cooked_monitor(rx, rate); | |
3140 | break; | |
3141 | } | |
3142 | case RX_DROP_UNUSABLE: | |
3143 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3144 | if (rx->sta) | |
3145 | rx->sta->rx_dropped++; | |
3146 | dev_kfree_skb(rx->skb); | |
3147 | break; | |
3148 | case RX_QUEUED: | |
3149 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3150 | break; | |
3151 | } | |
3152 | } | |
571ecf67 | 3153 | |
f9e124fb CL |
3154 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3155 | struct sk_buff_head *frames) | |
58905290 | 3156 | { |
58905290 | 3157 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3158 | struct sk_buff *skb; |
8944b79f | 3159 | |
e32f85f7 LCC |
3160 | #define CALL_RXH(rxh) \ |
3161 | do { \ | |
3162 | res = rxh(rx); \ | |
3163 | if (res != RX_CONTINUE) \ | |
2569a826 | 3164 | goto rxh_next; \ |
e32f85f7 | 3165 | } while (0); |
49461622 | 3166 | |
45ceeee8 JB |
3167 | /* Lock here to avoid hitting all of the data used in the RX |
3168 | * path (e.g. key data, station data, ...) concurrently when | |
3169 | * a frame is released from the reorder buffer due to timeout | |
3170 | * from the timer, potentially concurrently with RX from the | |
3171 | * driver. | |
3172 | */ | |
f9e124fb | 3173 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3174 | |
f9e124fb | 3175 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3176 | /* |
3177 | * all the other fields are valid across frames | |
3178 | * that belong to an aMPDU since they are on the | |
3179 | * same TID from the same station | |
3180 | */ | |
3181 | rx->skb = skb; | |
3182 | ||
2569a826 | 3183 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3184 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3185 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3186 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3187 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3188 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3189 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3190 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3191 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3192 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3193 | #endif |
2154c81c | 3194 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3195 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3196 | |
3197 | /* special treatment -- needs the queue */ | |
3198 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3199 | if (res != RX_CONTINUE) | |
3200 | goto rxh_next; | |
3201 | ||
2e161f78 | 3202 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3203 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3204 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3205 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3206 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3207 | |
aa0c8636 CL |
3208 | rxh_next: |
3209 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3210 | |
49461622 | 3211 | #undef CALL_RXH |
aa0c8636 | 3212 | } |
24a8fdad | 3213 | |
f9e124fb | 3214 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3215 | } |
3216 | ||
4406c376 | 3217 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3218 | { |
f9e124fb | 3219 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3220 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3221 | ||
f9e124fb CL |
3222 | __skb_queue_head_init(&reorder_release); |
3223 | ||
aa0c8636 CL |
3224 | #define CALL_RXH(rxh) \ |
3225 | do { \ | |
3226 | res = rxh(rx); \ | |
3227 | if (res != RX_CONTINUE) \ | |
3228 | goto rxh_next; \ | |
3229 | } while (0); | |
3230 | ||
0395442a | 3231 | CALL_RXH(ieee80211_rx_h_check_dup) |
aa0c8636 CL |
3232 | CALL_RXH(ieee80211_rx_h_check) |
3233 | ||
f9e124fb | 3234 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3235 | |
f9e124fb | 3236 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3237 | return; |
49461622 | 3238 | |
2569a826 | 3239 | rxh_next: |
aa0c8636 CL |
3240 | ieee80211_rx_handlers_result(rx, res); |
3241 | ||
3242 | #undef CALL_RXH | |
58905290 JB |
3243 | } |
3244 | ||
2bff8ebf | 3245 | /* |
dd318575 JB |
3246 | * This function makes calls into the RX path, therefore |
3247 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3248 | */ |
3249 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3250 | { | |
f9e124fb | 3251 | struct sk_buff_head frames; |
554891e6 JB |
3252 | struct ieee80211_rx_data rx = { |
3253 | .sta = sta, | |
3254 | .sdata = sta->sdata, | |
3255 | .local = sta->local, | |
9e26297a JB |
3256 | /* This is OK -- must be QoS data frame */ |
3257 | .security_idx = tid, | |
3258 | .seqno_idx = tid, | |
22d3a3c8 | 3259 | .flags = IEEE80211_RX_REORDER_TIMER, |
554891e6 | 3260 | }; |
2c15a0cf CL |
3261 | struct tid_ampdu_rx *tid_agg_rx; |
3262 | ||
3263 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3264 | if (!tid_agg_rx) | |
3265 | return; | |
2bff8ebf | 3266 | |
f9e124fb CL |
3267 | __skb_queue_head_init(&frames); |
3268 | ||
2c15a0cf | 3269 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3270 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3271 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3272 | |
b497de63 EG |
3273 | if (!skb_queue_empty(&frames)) { |
3274 | struct ieee80211_event event = { | |
3275 | .type = BA_FRAME_TIMEOUT, | |
3276 | .u.ba.tid = tid, | |
3277 | .u.ba.sta = &sta->sta, | |
3278 | }; | |
3279 | drv_event_callback(rx.local, rx.sdata, &event); | |
3280 | } | |
3281 | ||
f9e124fb | 3282 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3283 | } |
3284 | ||
571ecf67 JB |
3285 | /* main receive path */ |
3286 | ||
a58fbe1a | 3287 | static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) |
23a24def | 3288 | { |
20b01f80 | 3289 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 | 3290 | struct sk_buff *skb = rx->skb; |
a58fbe1a | 3291 | struct ieee80211_hdr *hdr = (void *)skb->data; |
eb9fb5b8 JB |
3292 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
3293 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3294 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3295 | ||
51fb61e7 | 3296 | switch (sdata->vif.type) { |
05c914fe | 3297 | case NL80211_IFTYPE_STATION: |
9bc383de | 3298 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3299 | return false; |
a58fbe1a JB |
3300 | if (multicast) |
3301 | return true; | |
3302 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe | 3303 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3304 | if (!bssid) |
3c2723f5 | 3305 | return false; |
6329b8d9 FF |
3306 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3307 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3308 | return false; |
a58fbe1a | 3309 | if (ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3310 | return true; |
a58fbe1a | 3311 | if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) |
3c2723f5 | 3312 | return false; |
a58fbe1a JB |
3313 | if (!multicast && |
3314 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
df140465 | 3315 | return false; |
a58fbe1a | 3316 | if (!rx->sta) { |
0fb8ca45 | 3317 | int rate_idx; |
5614618e JB |
3318 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3319 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3320 | else |
eb9fb5b8 | 3321 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3322 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3323 | BIT(rate_idx)); | |
0fb8ca45 | 3324 | } |
a58fbe1a | 3325 | return true; |
239281f8 RL |
3326 | case NL80211_IFTYPE_OCB: |
3327 | if (!bssid) | |
3328 | return false; | |
a58fbe1a | 3329 | if (ieee80211_is_beacon(hdr->frame_control)) |
239281f8 | 3330 | return false; |
a58fbe1a | 3331 | if (!is_broadcast_ether_addr(bssid)) |
239281f8 | 3332 | return false; |
a58fbe1a JB |
3333 | if (!multicast && |
3334 | !ether_addr_equal(sdata->dev->dev_addr, hdr->addr1)) | |
df140465 | 3335 | return false; |
a58fbe1a | 3336 | if (!rx->sta) { |
239281f8 RL |
3337 | int rate_idx; |
3338 | if (status->flag & RX_FLAG_HT) | |
3339 | rate_idx = 0; /* TODO: HT rates */ | |
3340 | else | |
3341 | rate_idx = status->rate_idx; | |
3342 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3343 | BIT(rate_idx)); | |
3344 | } | |
a58fbe1a | 3345 | return true; |
05c914fe | 3346 | case NL80211_IFTYPE_MESH_POINT: |
a58fbe1a JB |
3347 | if (multicast) |
3348 | return true; | |
3349 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe JB |
3350 | case NL80211_IFTYPE_AP_VLAN: |
3351 | case NL80211_IFTYPE_AP: | |
a58fbe1a JB |
3352 | if (!bssid) |
3353 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
3354 | ||
3355 | if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { | |
3df6eaea JB |
3356 | /* |
3357 | * Accept public action frames even when the | |
3358 | * BSSID doesn't match, this is used for P2P | |
3359 | * and location updates. Note that mac80211 | |
3360 | * itself never looks at these frames. | |
3361 | */ | |
2b9ccd4e JB |
3362 | if (!multicast && |
3363 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3364 | return false; |
d48b2968 | 3365 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3366 | return true; |
5c90067c | 3367 | return ieee80211_is_beacon(hdr->frame_control); |
a58fbe1a JB |
3368 | } |
3369 | ||
3370 | if (!ieee80211_has_tods(hdr->frame_control)) { | |
db8e1732 AN |
3371 | /* ignore data frames to TDLS-peers */ |
3372 | if (ieee80211_is_data(hdr->frame_control)) | |
3373 | return false; | |
3374 | /* ignore action frames to TDLS-peers */ | |
3375 | if (ieee80211_is_action(hdr->frame_control) && | |
3376 | !ether_addr_equal(bssid, hdr->addr1)) | |
3377 | return false; | |
23a24def | 3378 | } |
a58fbe1a | 3379 | return true; |
05c914fe | 3380 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3381 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3382 | return false; |
a58fbe1a | 3383 | return ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2); |
f142c6b9 | 3384 | case NL80211_IFTYPE_P2P_DEVICE: |
a58fbe1a JB |
3385 | return ieee80211_is_public_action(hdr, skb->len) || |
3386 | ieee80211_is_probe_req(hdr->frame_control) || | |
3387 | ieee80211_is_probe_resp(hdr->frame_control) || | |
3388 | ieee80211_is_beacon(hdr->frame_control); | |
2ca27bcf | 3389 | default: |
fb1c1cd6 | 3390 | break; |
23a24def JB |
3391 | } |
3392 | ||
a58fbe1a JB |
3393 | WARN_ON_ONCE(1); |
3394 | return false; | |
23a24def JB |
3395 | } |
3396 | ||
4406c376 JB |
3397 | /* |
3398 | * This function returns whether or not the SKB | |
3399 | * was destined for RX processing or not, which, | |
3400 | * if consume is true, is equivalent to whether | |
3401 | * or not the skb was consumed. | |
3402 | */ | |
3403 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3404 | struct sk_buff *skb, bool consume) | |
3405 | { | |
3406 | struct ieee80211_local *local = rx->local; | |
3407 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
4406c376 JB |
3408 | |
3409 | rx->skb = skb; | |
4406c376 | 3410 | |
a58fbe1a | 3411 | if (!ieee80211_accept_frame(rx)) |
4406c376 JB |
3412 | return false; |
3413 | ||
4406c376 JB |
3414 | if (!consume) { |
3415 | skb = skb_copy(skb, GFP_ATOMIC); | |
3416 | if (!skb) { | |
3417 | if (net_ratelimit()) | |
3418 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3419 | "failed to copy skb for %s\n", |
4406c376 JB |
3420 | sdata->name); |
3421 | return true; | |
3422 | } | |
3423 | ||
3424 | rx->skb = skb; | |
3425 | } | |
3426 | ||
3427 | ieee80211_invoke_rx_handlers(rx); | |
3428 | return true; | |
3429 | } | |
3430 | ||
571ecf67 | 3431 | /* |
6b59db7d | 3432 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3433 | * be called with rcu_read_lock protection. |
571ecf67 | 3434 | */ |
71ebb4aa | 3435 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3436 | struct sk_buff *skb) |
571ecf67 JB |
3437 | { |
3438 | struct ieee80211_local *local = hw_to_local(hw); | |
3439 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3440 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3441 | __le16 fc; |
5cf121c3 | 3442 | struct ieee80211_rx_data rx; |
4406c376 | 3443 | struct ieee80211_sub_if_data *prev; |
7bedd0cf JB |
3444 | struct sta_info *sta, *prev_sta; |
3445 | struct rhash_head *tmp; | |
e3cf8b3f | 3446 | int err = 0; |
571ecf67 | 3447 | |
e3cf8b3f | 3448 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3449 | memset(&rx, 0, sizeof(rx)); |
3450 | rx.skb = skb; | |
3451 | rx.local = local; | |
72abd81b | 3452 | |
e3cf8b3f | 3453 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
c206ca67 | 3454 | I802_DEBUG_INC(local->dot11ReceivedFragmentCount); |
571ecf67 | 3455 | |
4a4f1a58 JB |
3456 | if (ieee80211_is_mgmt(fc)) { |
3457 | /* drop frame if too short for header */ | |
3458 | if (skb->len < ieee80211_hdrlen(fc)) | |
3459 | err = -ENOBUFS; | |
3460 | else | |
3461 | err = skb_linearize(skb); | |
3462 | } else { | |
e3cf8b3f | 3463 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3464 | } |
e3cf8b3f ZY |
3465 | |
3466 | if (err) { | |
3467 | dev_kfree_skb(skb); | |
3468 | return; | |
3469 | } | |
3470 | ||
3471 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3472 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3473 | ieee80211_verify_alignment(&rx); |
38f3714d | 3474 | |
d48b2968 JB |
3475 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3476 | ieee80211_is_beacon(hdr->frame_control))) | |
3477 | ieee80211_scan_rx(local, skb); | |
3478 | ||
e3cf8b3f | 3479 | if (ieee80211_is_data(fc)) { |
7bedd0cf JB |
3480 | const struct bucket_table *tbl; |
3481 | ||
56af3268 | 3482 | prev_sta = NULL; |
4406c376 | 3483 | |
7bedd0cf JB |
3484 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); |
3485 | ||
3486 | for_each_sta_info(local, tbl, hdr->addr2, sta, tmp) { | |
56af3268 BG |
3487 | if (!prev_sta) { |
3488 | prev_sta = sta; | |
3489 | continue; | |
3490 | } | |
3491 | ||
3492 | rx.sta = prev_sta; | |
3493 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3494 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3495 | |
56af3268 | 3496 | prev_sta = sta; |
4406c376 | 3497 | } |
56af3268 BG |
3498 | |
3499 | if (prev_sta) { | |
3500 | rx.sta = prev_sta; | |
3501 | rx.sdata = prev_sta->sdata; | |
3502 | ||
4406c376 | 3503 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3504 | return; |
8e26d5ad | 3505 | goto out; |
56af3268 | 3506 | } |
4406c376 JB |
3507 | } |
3508 | ||
4b0dd98e | 3509 | prev = NULL; |
b2e7771e | 3510 | |
4b0dd98e JB |
3511 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3512 | if (!ieee80211_sdata_running(sdata)) | |
3513 | continue; | |
340e11f3 | 3514 | |
4b0dd98e JB |
3515 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3516 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3517 | continue; | |
340e11f3 | 3518 | |
4b0dd98e JB |
3519 | /* |
3520 | * frame is destined for this interface, but if it's | |
3521 | * not also for the previous one we handle that after | |
3522 | * the loop to avoid copying the SKB once too much | |
3523 | */ | |
4bb29f8c | 3524 | |
4b0dd98e | 3525 | if (!prev) { |
abe60632 | 3526 | prev = sdata; |
4b0dd98e | 3527 | continue; |
340e11f3 | 3528 | } |
4bb29f8c | 3529 | |
7852e361 | 3530 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3531 | rx.sdata = prev; |
3532 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3533 | |
4b0dd98e JB |
3534 | prev = sdata; |
3535 | } | |
3536 | ||
3537 | if (prev) { | |
7852e361 | 3538 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3539 | rx.sdata = prev; |
4406c376 | 3540 | |
4b0dd98e JB |
3541 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3542 | return; | |
571ecf67 | 3543 | } |
4406c376 | 3544 | |
8e26d5ad | 3545 | out: |
4406c376 | 3546 | dev_kfree_skb(skb); |
571ecf67 | 3547 | } |
6368e4b1 RR |
3548 | |
3549 | /* | |
3550 | * This is the receive path handler. It is called by a low level driver when an | |
3551 | * 802.11 MPDU is received from the hardware. | |
3552 | */ | |
103bf9f7 | 3553 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3554 | { |
3555 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3556 | struct ieee80211_rate *rate = NULL; |
3557 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3558 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3559 | |
d20ef63d JB |
3560 | WARN_ON_ONCE(softirq_count() == 0); |
3561 | ||
444e3803 | 3562 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3563 | goto drop; |
8318d78a JB |
3564 | |
3565 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3566 | if (WARN_ON(!sband)) |
3567 | goto drop; | |
8318d78a | 3568 | |
89c3a8ac JB |
3569 | /* |
3570 | * If we're suspending, it is possible although not too likely | |
3571 | * that we'd be receiving frames after having already partially | |
3572 | * quiesced the stack. We can't process such frames then since | |
3573 | * that might, for example, cause stations to be added or other | |
3574 | * driver callbacks be invoked. | |
3575 | */ | |
77a980dc JB |
3576 | if (unlikely(local->quiescing || local->suspended)) |
3577 | goto drop; | |
89c3a8ac | 3578 | |
04800ada AN |
3579 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3580 | if (unlikely(local->in_reconfig)) | |
3581 | goto drop; | |
3582 | ||
ea77f12f JB |
3583 | /* |
3584 | * The same happens when we're not even started, | |
3585 | * but that's worth a warning. | |
3586 | */ | |
77a980dc JB |
3587 | if (WARN_ON(!local->started)) |
3588 | goto drop; | |
ea77f12f | 3589 | |
fc885189 | 3590 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3591 | /* |
fc885189 JB |
3592 | * Validate the rate, unless a PLCP error means that |
3593 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3594 | */ |
fc885189 JB |
3595 | |
3596 | if (status->flag & RX_FLAG_HT) { | |
3597 | /* | |
3598 | * rate_idx is MCS index, which can be [0-76] | |
3599 | * as documented on: | |
3600 | * | |
3601 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3602 | * | |
3603 | * Anything else would be some sort of driver or | |
3604 | * hardware error. The driver should catch hardware | |
3605 | * errors. | |
3606 | */ | |
444e3803 | 3607 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3608 | "Rate marked as an HT rate but passed " |
3609 | "status->rate_idx is not " | |
3610 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3611 | status->rate_idx, | |
3612 | status->rate_idx)) | |
3613 | goto drop; | |
5614618e JB |
3614 | } else if (status->flag & RX_FLAG_VHT) { |
3615 | if (WARN_ONCE(status->rate_idx > 9 || | |
3616 | !status->vht_nss || | |
3617 | status->vht_nss > 8, | |
3618 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3619 | status->rate_idx, status->vht_nss)) | |
3620 | goto drop; | |
fc885189 | 3621 | } else { |
444e3803 | 3622 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3623 | goto drop; |
3624 | rate = &sband->bitrates[status->rate_idx]; | |
3625 | } | |
0fb8ca45 | 3626 | } |
6368e4b1 | 3627 | |
554891e6 JB |
3628 | status->rx_flags = 0; |
3629 | ||
6368e4b1 RR |
3630 | /* |
3631 | * key references and virtual interfaces are protected using RCU | |
3632 | * and this requires that we are in a read-side RCU section during | |
3633 | * receive processing | |
3634 | */ | |
3635 | rcu_read_lock(); | |
3636 | ||
3637 | /* | |
3638 | * Frames with failed FCS/PLCP checksum are not returned, | |
3639 | * all other frames are returned without radiotap header | |
3640 | * if it was previously present. | |
3641 | * Also, frames with less than 16 bytes are dropped. | |
3642 | */ | |
f1d58c25 | 3643 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3644 | if (!skb) { |
3645 | rcu_read_unlock(); | |
3646 | return; | |
3647 | } | |
3648 | ||
e1e54068 JB |
3649 | ieee80211_tpt_led_trig_rx(local, |
3650 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3651 | skb->len); | |
071d9ac2 | 3652 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3653 | |
3654 | rcu_read_unlock(); | |
77a980dc JB |
3655 | |
3656 | return; | |
3657 | drop: | |
3658 | kfree_skb(skb); | |
6368e4b1 | 3659 | } |
103bf9f7 | 3660 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3661 | |
3662 | /* This is a version of the rx handler that can be called from hard irq | |
3663 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3664 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3665 | { |
3666 | struct ieee80211_local *local = hw_to_local(hw); | |
3667 | ||
3668 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3669 | ||
571ecf67 JB |
3670 | skb->pkt_type = IEEE80211_RX_MSG; |
3671 | skb_queue_tail(&local->skb_queue, skb); | |
3672 | tasklet_schedule(&local->tasklet); | |
3673 | } | |
3674 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |