Commit | Line | Data |
---|---|---|
571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
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 | 124 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
0c028b5f | 125 | RX_FLAG_FAILED_PLCP_CRC)) |
6b59db7d ZG |
126 | return true; |
127 | ||
1f7bba79 | 128 | if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) |
6b59db7d ZG |
129 | return true; |
130 | ||
87228f57 HH |
131 | if (ieee80211_is_ctl(hdr->frame_control) && |
132 | !ieee80211_is_pspoll(hdr->frame_control) && | |
133 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
134 | return true; |
135 | ||
136 | return false; | |
b2e7771e JB |
137 | } |
138 | ||
601ae7f2 | 139 | static int |
1f7bba79 JB |
140 | ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, |
141 | struct ieee80211_rx_status *status, | |
142 | struct sk_buff *skb) | |
601ae7f2 BR |
143 | { |
144 | int len; | |
145 | ||
146 | /* always present fields */ | |
a144f378 | 147 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 148 | |
a144f378 | 149 | /* allocate extra bitmaps */ |
a144f378 JB |
150 | if (status->chains) |
151 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
152 | |
153 | if (ieee80211_have_rx_timestamp(status)) { | |
154 | len = ALIGN(len, 8); | |
601ae7f2 | 155 | len += 8; |
90b9e446 | 156 | } |
30686bf7 | 157 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) |
601ae7f2 | 158 | len += 1; |
601ae7f2 | 159 | |
a144f378 JB |
160 | /* antenna field, if we don't have per-chain info */ |
161 | if (!status->chains) | |
162 | len += 1; | |
163 | ||
90b9e446 JB |
164 | /* padding for RX_FLAGS if necessary */ |
165 | len = ALIGN(len, 2); | |
601ae7f2 | 166 | |
6d744bac JB |
167 | if (status->flag & RX_FLAG_HT) /* HT info */ |
168 | len += 3; | |
169 | ||
4c298677 | 170 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 171 | len = ALIGN(len, 4); |
4c298677 JB |
172 | len += 8; |
173 | } | |
174 | ||
51648921 JB |
175 | if (status->flag & RX_FLAG_VHT) { |
176 | len = ALIGN(len, 2); | |
177 | len += 12; | |
178 | } | |
179 | ||
a144f378 JB |
180 | if (status->chains) { |
181 | /* antenna and antenna signal fields */ | |
182 | len += 2 * hweight8(status->chains); | |
183 | } | |
184 | ||
1f7bba79 JB |
185 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
186 | struct ieee80211_vendor_radiotap *rtap = (void *)skb->data; | |
187 | ||
188 | /* vendor presence bitmap */ | |
189 | len += 4; | |
190 | /* alignment for fixed 6-byte vendor data header */ | |
191 | len = ALIGN(len, 2); | |
192 | /* vendor data header */ | |
193 | len += 6; | |
194 | if (WARN_ON(rtap->align == 0)) | |
195 | rtap->align = 1; | |
196 | len = ALIGN(len, rtap->align); | |
197 | len += rtap->len + rtap->pad; | |
198 | } | |
199 | ||
601ae7f2 BR |
200 | return len; |
201 | } | |
202 | ||
00ea6deb | 203 | /* |
601ae7f2 BR |
204 | * ieee80211_add_rx_radiotap_header - add radiotap header |
205 | * | |
206 | * add a radiotap header containing all the fields which the hardware provided. | |
207 | */ | |
208 | static void | |
209 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
210 | struct sk_buff *skb, | |
601ae7f2 | 211 | struct ieee80211_rate *rate, |
973ef21a | 212 | int rtap_len, bool has_fcs) |
601ae7f2 | 213 | { |
f1d58c25 | 214 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
215 | struct ieee80211_radiotap_header *rthdr; |
216 | unsigned char *pos; | |
a144f378 JB |
217 | __le32 *it_present; |
218 | u32 it_present_val; | |
6a86b9c7 | 219 | u16 rx_flags = 0; |
a5e70697 | 220 | u16 channel_flags = 0; |
a144f378 JB |
221 | int mpdulen, chain; |
222 | unsigned long chains = status->chains; | |
1f7bba79 JB |
223 | struct ieee80211_vendor_radiotap rtap = {}; |
224 | ||
225 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
226 | rtap = *(struct ieee80211_vendor_radiotap *)skb->data; | |
227 | /* rtap.len and rtap.pad are undone immediately */ | |
228 | skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad); | |
229 | } | |
f4bda337 TP |
230 | |
231 | mpdulen = skb->len; | |
30686bf7 | 232 | if (!(has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS))) |
f4bda337 | 233 | mpdulen += FCS_LEN; |
601ae7f2 BR |
234 | |
235 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
1f7bba79 | 236 | memset(rthdr, 0, rtap_len - rtap.len - rtap.pad); |
a144f378 | 237 | it_present = &rthdr->it_present; |
601ae7f2 BR |
238 | |
239 | /* radiotap header, set always present flags */ | |
0059b2b1 | 240 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
241 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
242 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
243 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
244 | ||
245 | if (!status->chains) | |
246 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
247 | ||
248 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
249 | it_present_val |= | |
250 | BIT(IEEE80211_RADIOTAP_EXT) | | |
251 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
252 | put_unaligned_le32(it_present_val, it_present); | |
253 | it_present++; | |
254 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
255 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
256 | } | |
601ae7f2 | 257 | |
1f7bba79 JB |
258 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { |
259 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | | |
260 | BIT(IEEE80211_RADIOTAP_EXT); | |
261 | put_unaligned_le32(it_present_val, it_present); | |
262 | it_present++; | |
263 | it_present_val = rtap.present; | |
264 | } | |
265 | ||
a144f378 JB |
266 | put_unaligned_le32(it_present_val, it_present); |
267 | ||
268 | pos = (void *)(it_present + 1); | |
269 | ||
601ae7f2 BR |
270 | /* the order of the following fields is important */ |
271 | ||
272 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 273 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
274 | /* padding */ |
275 | while ((pos - (u8 *)rthdr) & 7) | |
276 | *pos++ = 0; | |
f4bda337 TP |
277 | put_unaligned_le64( |
278 | ieee80211_calculate_rx_timestamp(local, status, | |
279 | mpdulen, 0), | |
280 | pos); | |
1df332e8 | 281 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
282 | pos += 8; |
283 | } | |
284 | ||
285 | /* IEEE80211_RADIOTAP_FLAGS */ | |
30686bf7 | 286 | if (has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
601ae7f2 | 287 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
288 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
289 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
290 | if (status->flag & RX_FLAG_SHORTPRE) |
291 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
292 | pos++; |
293 | ||
294 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 295 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 296 | /* |
f8d1ccf1 | 297 | * Without rate information don't add it. If we have, |
38f37be2 | 298 | * MCS information is a separate field in radiotap, |
73b48099 JB |
299 | * added below. The byte here is needed as padding |
300 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
301 | */ |
302 | *pos = 0; | |
8d6f658e | 303 | } else { |
2103dec1 | 304 | int shift = 0; |
ebe6c7ba | 305 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
306 | if (status->flag & RX_FLAG_10MHZ) |
307 | shift = 1; | |
308 | else if (status->flag & RX_FLAG_5MHZ) | |
309 | shift = 2; | |
310 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 311 | } |
601ae7f2 BR |
312 | pos++; |
313 | ||
314 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 315 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 316 | pos += 2; |
a5e70697 SW |
317 | if (status->flag & RX_FLAG_10MHZ) |
318 | channel_flags |= IEEE80211_CHAN_HALF; | |
319 | else if (status->flag & RX_FLAG_5MHZ) | |
320 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
321 | ||
601ae7f2 | 322 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 323 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 324 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 325 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 326 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 327 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 328 | else if (rate) |
3a5c5e81 | 329 | channel_flags |= IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 330 | else |
a5e70697 SW |
331 | channel_flags |= IEEE80211_CHAN_2GHZ; |
332 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
333 | pos += 2; |
334 | ||
335 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
30686bf7 | 336 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM) && |
fe8431f8 | 337 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
601ae7f2 BR |
338 | *pos = status->signal; |
339 | rthdr->it_present |= | |
340 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
341 | pos++; | |
342 | } | |
343 | ||
601ae7f2 BR |
344 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
345 | ||
a144f378 JB |
346 | if (!status->chains) { |
347 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
348 | *pos = status->antenna; | |
349 | pos++; | |
350 | } | |
601ae7f2 | 351 | |
601ae7f2 BR |
352 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
353 | ||
354 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
355 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 356 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 357 | *pos++ = 0; |
aae89831 | 358 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
359 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
360 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 361 | pos += 2; |
6d744bac JB |
362 | |
363 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
364 | unsigned int stbc; |
365 | ||
6d744bac | 366 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 367 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
368 | *pos = 0; |
369 | if (status->flag & RX_FLAG_SHORT_GI) | |
370 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
371 | if (status->flag & RX_FLAG_40MHZ) | |
372 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
373 | if (status->flag & RX_FLAG_HT_GF) |
374 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
375 | if (status->flag & RX_FLAG_LDPC) |
376 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
377 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
378 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
379 | pos++; |
380 | *pos++ = status->rate_idx; | |
381 | } | |
4c298677 JB |
382 | |
383 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
384 | u16 flags = 0; | |
385 | ||
386 | /* ensure 4 byte alignment */ | |
387 | while ((pos - (u8 *)rthdr) & 3) | |
388 | pos++; | |
389 | rthdr->it_present |= | |
390 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
391 | put_unaligned_le32(status->ampdu_reference, pos); | |
392 | pos += 4; | |
4c298677 JB |
393 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) |
394 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
395 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
396 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
397 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
398 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
399 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
400 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
401 | put_unaligned_le16(flags, pos); | |
402 | pos += 2; | |
403 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
404 | *pos++ = status->ampdu_delimiter_crc; | |
405 | else | |
406 | *pos++ = 0; | |
407 | *pos++ = 0; | |
408 | } | |
90b9e446 | 409 | |
51648921 JB |
410 | if (status->flag & RX_FLAG_VHT) { |
411 | u16 known = local->hw.radiotap_vht_details; | |
412 | ||
413 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
51648921 JB |
414 | put_unaligned_le16(known, pos); |
415 | pos += 2; | |
416 | /* flags */ | |
417 | if (status->flag & RX_FLAG_SHORT_GI) | |
418 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
419 | /* in VHT, STBC is binary */ |
420 | if (status->flag & RX_FLAG_STBC_MASK) | |
421 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
422 | if (status->vht_flag & RX_VHT_FLAG_BF) |
423 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
424 | pos++; |
425 | /* bandwidth */ | |
1b8d242a | 426 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 427 | *pos++ = 4; |
1b8d242a | 428 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
429 | *pos++ = 11; |
430 | else if (status->flag & RX_FLAG_40MHZ) | |
431 | *pos++ = 1; | |
432 | else /* 20 MHz */ | |
433 | *pos++ = 0; | |
434 | /* MCS/NSS */ | |
435 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
436 | pos += 4; | |
437 | /* coding field */ | |
63c361f5 EG |
438 | if (status->flag & RX_FLAG_LDPC) |
439 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
440 | pos++; |
441 | /* group ID */ | |
442 | pos++; | |
443 | /* partial_aid */ | |
444 | pos += 2; | |
445 | } | |
446 | ||
a144f378 JB |
447 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
448 | *pos++ = status->chain_signal[chain]; | |
449 | *pos++ = chain; | |
450 | } | |
1f7bba79 JB |
451 | |
452 | if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { | |
453 | /* ensure 2 byte alignment for the vendor field as required */ | |
454 | if ((pos - (u8 *)rthdr) & 1) | |
455 | *pos++ = 0; | |
456 | *pos++ = rtap.oui[0]; | |
457 | *pos++ = rtap.oui[1]; | |
458 | *pos++ = rtap.oui[2]; | |
459 | *pos++ = rtap.subns; | |
460 | put_unaligned_le16(rtap.len, pos); | |
461 | pos += 2; | |
462 | /* align the actual payload as requested */ | |
463 | while ((pos - (u8 *)rthdr) & (rtap.align - 1)) | |
464 | *pos++ = 0; | |
465 | /* data (and possible padding) already follows */ | |
466 | } | |
601ae7f2 BR |
467 | } |
468 | ||
b2e7771e JB |
469 | /* |
470 | * This function copies a received frame to all monitor interfaces and | |
471 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
472 | * radiotap header the driver might have added. | |
473 | */ | |
474 | static struct sk_buff * | |
475 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 476 | struct ieee80211_rate *rate) |
b2e7771e | 477 | { |
f1d58c25 | 478 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 479 | struct ieee80211_sub_if_data *sdata; |
1f7bba79 | 480 | int rt_hdrlen, needed_headroom; |
b2e7771e JB |
481 | struct sk_buff *skb, *skb2; |
482 | struct net_device *prev_dev = NULL; | |
483 | int present_fcs_len = 0; | |
1f7bba79 JB |
484 | unsigned int rtap_vendor_space = 0; |
485 | ||
486 | if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) { | |
487 | struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data; | |
488 | ||
489 | rtap_vendor_space = sizeof(*rtap) + rtap->len + rtap->pad; | |
490 | } | |
b2e7771e JB |
491 | |
492 | /* | |
493 | * First, we may need to make a copy of the skb because | |
494 | * (1) we need to modify it for radiotap (if not present), and | |
495 | * (2) the other RX handlers will modify the skb we got. | |
496 | * | |
497 | * We don't need to, of course, if we aren't going to return | |
498 | * the SKB because it has a bad FCS/PLCP checksum. | |
499 | */ | |
0869aea0 | 500 | |
30686bf7 | 501 | if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) |
b2e7771e JB |
502 | present_fcs_len = FCS_LEN; |
503 | ||
1f7bba79 JB |
504 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
505 | if (!pskb_may_pull(origskb, 2 + rtap_vendor_space)) { | |
e3cf8b3f ZY |
506 | dev_kfree_skb(origskb); |
507 | return NULL; | |
508 | } | |
509 | ||
b2e7771e | 510 | if (!local->monitors) { |
1f7bba79 JB |
511 | if (should_drop_frame(origskb, present_fcs_len, |
512 | rtap_vendor_space)) { | |
b2e7771e JB |
513 | dev_kfree_skb(origskb); |
514 | return NULL; | |
515 | } | |
516 | ||
1f7bba79 | 517 | return remove_monitor_info(local, origskb, rtap_vendor_space); |
b2e7771e JB |
518 | } |
519 | ||
751413ea | 520 | /* room for the radiotap header based on driver features */ |
1f7bba79 JB |
521 | rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, origskb); |
522 | needed_headroom = rt_hdrlen - rtap_vendor_space; | |
751413ea | 523 | |
1f7bba79 | 524 | if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { |
b2e7771e JB |
525 | /* only need to expand headroom if necessary */ |
526 | skb = origskb; | |
527 | origskb = NULL; | |
528 | ||
529 | /* | |
530 | * This shouldn't trigger often because most devices have an | |
531 | * RX header they pull before we get here, and that should | |
532 | * be big enough for our radiotap information. We should | |
533 | * probably export the length to drivers so that we can have | |
534 | * them allocate enough headroom to start with. | |
535 | */ | |
536 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 537 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
538 | dev_kfree_skb(skb); |
539 | return NULL; | |
540 | } | |
541 | } else { | |
542 | /* | |
543 | * Need to make a copy and possibly remove radiotap header | |
544 | * and FCS from the original. | |
545 | */ | |
546 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
547 | ||
1f7bba79 JB |
548 | origskb = remove_monitor_info(local, origskb, |
549 | rtap_vendor_space); | |
b2e7771e JB |
550 | |
551 | if (!skb) | |
552 | return origskb; | |
553 | } | |
554 | ||
0869aea0 | 555 | /* prepend radiotap information */ |
1f7bba79 | 556 | ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true); |
b2e7771e | 557 | |
ce3edf6d | 558 | skb_reset_mac_header(skb); |
b2e7771e JB |
559 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
560 | skb->pkt_type = PACKET_OTHERHOST; | |
561 | skb->protocol = htons(ETH_P_802_2); | |
562 | ||
563 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 564 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
565 | continue; |
566 | ||
3d30d949 MW |
567 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
568 | continue; | |
569 | ||
9607e6b6 | 570 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
571 | continue; |
572 | ||
b2e7771e JB |
573 | if (prev_dev) { |
574 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
575 | if (skb2) { | |
576 | skb2->dev = prev_dev; | |
5548a8a1 | 577 | netif_receive_skb(skb2); |
b2e7771e JB |
578 | } |
579 | } | |
580 | ||
581 | prev_dev = sdata->dev; | |
5a490510 | 582 | ieee80211_rx_stats(sdata->dev, skb->len); |
b2e7771e JB |
583 | } |
584 | ||
585 | if (prev_dev) { | |
586 | skb->dev = prev_dev; | |
5548a8a1 | 587 | netif_receive_skb(skb); |
b2e7771e JB |
588 | } else |
589 | dev_kfree_skb(skb); | |
590 | ||
591 | return origskb; | |
592 | } | |
593 | ||
5cf121c3 | 594 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 595 | { |
238f74a2 | 596 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 597 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 598 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
599 | |
600 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
601 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
602 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 603 | /* frame has qos control */ |
238f74a2 | 604 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 605 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 606 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
607 | |
608 | seqno_idx = tid; | |
609 | security_idx = tid; | |
6e0d114d | 610 | } else { |
1411f9b5 JB |
611 | /* |
612 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
613 | * | |
614 | * Sequence numbers for management frames, QoS data | |
615 | * frames with a broadcast/multicast address in the | |
616 | * Address 1 field, and all non-QoS data frames sent | |
617 | * by QoS STAs are assigned using an additional single | |
618 | * modulo-4096 counter, [...] | |
619 | * | |
620 | * We also use that counter for non-QoS STAs. | |
621 | */ | |
5a306f58 | 622 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
623 | security_idx = 0; |
624 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 625 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 626 | tid = 0; |
6e0d114d | 627 | } |
52865dfd | 628 | |
9e26297a JB |
629 | rx->seqno_idx = seqno_idx; |
630 | rx->security_idx = security_idx; | |
6e0d114d JB |
631 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
632 | * For now, set skb->priority to 0 for other cases. */ | |
633 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 634 | } |
6e0d114d | 635 | |
d1c3a37c JB |
636 | /** |
637 | * DOC: Packet alignment | |
638 | * | |
639 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
640 | * to the stack. | |
641 | * | |
642 | * Additionally, should, if possible, align the payload data in a way that | |
643 | * guarantees that the contained IP header is aligned to a four-byte | |
644 | * boundary. In the case of regular frames, this simply means aligning the | |
645 | * payload to a four-byte boundary (because either the IP header is directly | |
646 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
647 | * in front of it). If the payload data is not properly aligned and the |
648 | * architecture doesn't support efficient unaligned operations, mac80211 | |
649 | * will align the data. | |
d1c3a37c JB |
650 | * |
651 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
652 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
653 | * push the IP header further back to a multiple of four again. Thankfully, the | |
654 | * specs were sane enough this time around to require padding each A-MSDU | |
655 | * subframe to a length that is a multiple of four. | |
656 | * | |
25985edc | 657 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
658 | * the payload is not supported, the driver is required to move the 802.11 |
659 | * header to be directly in front of the payload in that case. | |
660 | */ | |
661 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 662 | { |
59d9cb07 | 663 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
441275e1 | 664 | WARN_ON_ONCE((unsigned long)rx->skb->data & 1); |
d1c3a37c | 665 | #endif |
6e0d114d JB |
666 | } |
667 | ||
6368e4b1 | 668 | |
571ecf67 JB |
669 | /* rx handlers */ |
670 | ||
3cfcf6ac JM |
671 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
672 | { | |
673 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
674 | ||
d8ca16db | 675 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
676 | return 0; |
677 | ||
d8ca16db | 678 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
679 | } |
680 | ||
681 | ||
682 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
683 | { | |
684 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
685 | ||
d8ca16db | 686 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
687 | return 0; |
688 | ||
d8ca16db | 689 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
690 | } |
691 | ||
692 | ||
693 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
694 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
695 | { | |
696 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
697 | struct ieee80211_mmie *mmie; | |
56c52da2 | 698 | struct ieee80211_mmie_16 *mmie16; |
3cfcf6ac | 699 | |
1df332e8 | 700 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
701 | return -1; |
702 | ||
d8ca16db | 703 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
704 | return -1; /* not a robust management frame */ |
705 | ||
706 | mmie = (struct ieee80211_mmie *) | |
707 | (skb->data + skb->len - sizeof(*mmie)); | |
56c52da2 JM |
708 | if (mmie->element_id == WLAN_EID_MMIE && |
709 | mmie->length == sizeof(*mmie) - 2) | |
710 | return le16_to_cpu(mmie->key_id); | |
711 | ||
712 | mmie16 = (struct ieee80211_mmie_16 *) | |
713 | (skb->data + skb->len - sizeof(*mmie16)); | |
714 | if (skb->len >= 24 + sizeof(*mmie16) && | |
715 | mmie16->element_id == WLAN_EID_MMIE && | |
716 | mmie16->length == sizeof(*mmie16) - 2) | |
717 | return le16_to_cpu(mmie16->key_id); | |
718 | ||
719 | return -1; | |
3cfcf6ac JM |
720 | } |
721 | ||
2475b1cc MS |
722 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
723 | struct sk_buff *skb) | |
724 | { | |
725 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
726 | __le16 fc; | |
727 | int hdrlen; | |
728 | u8 keyid; | |
729 | ||
730 | fc = hdr->frame_control; | |
731 | hdrlen = ieee80211_hdrlen(fc); | |
732 | ||
733 | if (skb->len < hdrlen + cs->hdr_len) | |
734 | return -EINVAL; | |
735 | ||
736 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
737 | keyid &= cs->key_idx_mask; | |
738 | keyid >>= cs->key_idx_shift; | |
739 | ||
740 | return keyid; | |
741 | } | |
742 | ||
1df332e8 | 743 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 744 | { |
a7767f95 | 745 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 746 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 747 | |
a7767f95 | 748 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
749 | if (is_multicast_ether_addr(hdr->addr1)) { |
750 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 751 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 752 | return RX_DROP_MONITOR; |
b203ca39 | 753 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
754 | return RX_DROP_MONITOR; |
755 | } else { | |
756 | if (!ieee80211_has_a4(hdr->frame_control)) | |
757 | return RX_DROP_MONITOR; | |
b203ca39 | 758 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
759 | return RX_DROP_MONITOR; |
760 | } | |
33b64eb2 LCC |
761 | } |
762 | ||
763 | /* If there is not an established peer link and this is not a peer link | |
764 | * establisment frame, beacon or probe, drop the frame. | |
765 | */ | |
766 | ||
57cf8043 | 767 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 768 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 769 | |
a7767f95 | 770 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
771 | return RX_DROP_MONITOR; |
772 | ||
a7767f95 | 773 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 774 | u8 category; |
9b395bc3 JB |
775 | |
776 | /* make sure category field is present */ | |
777 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
778 | return RX_DROP_MONITOR; | |
779 | ||
33b64eb2 | 780 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
781 | category = mgmt->u.action.category; |
782 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 783 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 784 | return RX_DROP_MONITOR; |
33b64eb2 | 785 | return RX_CONTINUE; |
33b64eb2 LCC |
786 | } |
787 | ||
a7767f95 HH |
788 | if (ieee80211_is_probe_req(hdr->frame_control) || |
789 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
790 | ieee80211_is_beacon(hdr->frame_control) || |
791 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
792 | return RX_CONTINUE; |
793 | ||
794 | return RX_DROP_MONITOR; | |
a7767f95 HH |
795 | } |
796 | ||
902acc78 JB |
797 | return RX_CONTINUE; |
798 | } | |
33b64eb2 | 799 | |
d3b2fb53 | 800 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 801 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
802 | int index, |
803 | struct sk_buff_head *frames) | |
1edfb1af | 804 | { |
83eb935e MK |
805 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
806 | struct sk_buff *skb; | |
4cfda47b | 807 | struct ieee80211_rx_status *status; |
1edfb1af | 808 | |
dd318575 JB |
809 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
810 | ||
83eb935e | 811 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
812 | goto no_frame; |
813 | ||
83eb935e MK |
814 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
815 | __skb_queue_purge(skb_list); | |
816 | goto no_frame; | |
817 | } | |
818 | ||
819 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 820 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
821 | while ((skb = __skb_dequeue(skb_list))) { |
822 | status = IEEE80211_SKB_RXCB(skb); | |
823 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
824 | __skb_queue_tail(frames, skb); | |
825 | } | |
1edfb1af JB |
826 | |
827 | no_frame: | |
9a886586 | 828 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
829 | } |
830 | ||
d3b2fb53 | 831 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 832 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
833 | u16 head_seq_num, |
834 | struct sk_buff_head *frames) | |
1edfb1af JB |
835 | { |
836 | int index; | |
837 | ||
dd318575 JB |
838 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
839 | ||
9a886586 | 840 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 841 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
842 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
843 | frames); | |
1edfb1af JB |
844 | } |
845 | } | |
846 | ||
847 | /* | |
848 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
849 | * the skb was added to the buffer longer than this time ago, the earlier | |
850 | * frames that have not yet been received are assumed to be lost and the skb | |
851 | * can be released for processing. This may also release other skb's from the | |
852 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
853 | * |
854 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
855 | */ |
856 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
857 | ||
d3b2fb53 | 858 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
859 | struct tid_ampdu_rx *tid_agg_rx, |
860 | struct sk_buff_head *frames) | |
aa0c8636 | 861 | { |
83eb935e | 862 | int index, i, j; |
aa0c8636 | 863 | |
dd318575 JB |
864 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
865 | ||
aa0c8636 | 866 | /* release the buffer until next missing frame */ |
2e3049b7 | 867 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 868 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 869 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
870 | /* |
871 | * No buffers ready to be released, but check whether any | |
872 | * frames in the reorder buffer have timed out. | |
873 | */ | |
aa0c8636 CL |
874 | int skipped = 1; |
875 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
876 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
877 | if (!ieee80211_rx_reorder_ready( |
878 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
879 | skipped++; |
880 | continue; | |
881 | } | |
499fe9a4 DH |
882 | if (skipped && |
883 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 884 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 885 | goto set_release_timer; |
aa0c8636 | 886 | |
83eb935e MK |
887 | /* don't leave incomplete A-MSDUs around */ |
888 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
889 | i = (i + 1) % tid_agg_rx->buf_size) | |
890 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
891 | ||
bdcbd8e0 JB |
892 | ht_dbg_ratelimited(sdata, |
893 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
894 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
895 | frames); | |
aa0c8636 CL |
896 | |
897 | /* | |
898 | * Increment the head seq# also for the skipped slots. | |
899 | */ | |
900 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
901 | (tid_agg_rx->head_seq_num + |
902 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
903 | skipped = 0; |
904 | } | |
83eb935e MK |
905 | } else while (ieee80211_rx_reorder_ready( |
906 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
907 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
908 | frames); | |
2e3049b7 | 909 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 910 | } |
2bff8ebf CL |
911 | |
912 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 913 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
914 | |
915 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
916 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
917 | if (ieee80211_rx_reorder_ready( |
918 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
919 | break; |
920 | } | |
921 | ||
922 | set_release_timer: | |
923 | ||
788211d8 JB |
924 | if (!tid_agg_rx->removed) |
925 | mod_timer(&tid_agg_rx->reorder_timer, | |
926 | tid_agg_rx->reorder_time[j] + 1 + | |
927 | HT_RX_REORDER_BUF_TIMEOUT); | |
2bff8ebf CL |
928 | } else { |
929 | del_timer(&tid_agg_rx->reorder_timer); | |
930 | } | |
aa0c8636 CL |
931 | } |
932 | ||
1edfb1af JB |
933 | /* |
934 | * As this function belongs to the RX path it must be under | |
935 | * rcu_read_lock protection. It returns false if the frame | |
936 | * can be processed immediately, true if it was consumed. | |
937 | */ | |
d3b2fb53 | 938 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 939 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
940 | struct sk_buff *skb, |
941 | struct sk_buff_head *frames) | |
1edfb1af JB |
942 | { |
943 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 944 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
945 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
946 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
947 | u16 head_seq_num, buf_size; | |
948 | int index; | |
2bff8ebf | 949 | bool ret = true; |
1edfb1af | 950 | |
dd318575 JB |
951 | spin_lock(&tid_agg_rx->reorder_lock); |
952 | ||
4549cf2b MK |
953 | /* |
954 | * Offloaded BA sessions have no known starting sequence number so pick | |
955 | * one from first Rxed frame for this tid after BA was started. | |
956 | */ | |
957 | if (unlikely(tid_agg_rx->auto_seq)) { | |
958 | tid_agg_rx->auto_seq = false; | |
959 | tid_agg_rx->ssn = mpdu_seq_num; | |
960 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
961 | } | |
962 | ||
1edfb1af JB |
963 | buf_size = tid_agg_rx->buf_size; |
964 | head_seq_num = tid_agg_rx->head_seq_num; | |
965 | ||
966 | /* frame with out of date sequence number */ | |
9a886586 | 967 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 968 | dev_kfree_skb(skb); |
2bff8ebf | 969 | goto out; |
1edfb1af JB |
970 | } |
971 | ||
972 | /* | |
973 | * If frame the sequence number exceeds our buffering window | |
974 | * size release some previous frames to make room for this one. | |
975 | */ | |
9a886586 JB |
976 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
977 | head_seq_num = ieee80211_sn_inc( | |
978 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 979 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 980 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 981 | head_seq_num, frames); |
1edfb1af JB |
982 | } |
983 | ||
984 | /* Now the new frame is always in the range of the reordering buffer */ | |
985 | ||
2e3049b7 | 986 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
987 | |
988 | /* check if we already stored this frame */ | |
83eb935e | 989 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 990 | dev_kfree_skb(skb); |
2bff8ebf | 991 | goto out; |
1edfb1af JB |
992 | } |
993 | ||
994 | /* | |
995 | * If the current MPDU is in the right order and nothing else | |
996 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
997 | * If it is first but there's something stored, we may be able |
998 | * to release frames after this one. | |
1edfb1af JB |
999 | */ |
1000 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
1001 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
1002 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
1003 | tid_agg_rx->head_seq_num = | |
1004 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
1005 | ret = false; |
1006 | goto out; | |
1edfb1af JB |
1007 | } |
1008 | ||
1009 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
1010 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
1011 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
1012 | tid_agg_rx->reorder_time[index] = jiffies; | |
1013 | tid_agg_rx->stored_mpdu_num++; | |
1014 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
1015 | } | |
1edfb1af | 1016 | |
2bff8ebf CL |
1017 | out: |
1018 | spin_unlock(&tid_agg_rx->reorder_lock); | |
1019 | return ret; | |
1edfb1af JB |
1020 | } |
1021 | ||
1022 | /* | |
1023 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
1024 | * true if the MPDU was buffered, false if it should be processed. | |
1025 | */ | |
f9e124fb CL |
1026 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
1027 | struct sk_buff_head *frames) | |
1edfb1af | 1028 | { |
2569a826 JB |
1029 | struct sk_buff *skb = rx->skb; |
1030 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 1031 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
2569a826 | 1032 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
1033 | struct tid_ampdu_rx *tid_agg_rx; |
1034 | u16 sc; | |
6cc00d54 | 1035 | u8 tid, ack_policy; |
1edfb1af | 1036 | |
051a41fa JB |
1037 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
1038 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 1039 | goto dont_reorder; |
1edfb1af JB |
1040 | |
1041 | /* | |
1042 | * filter the QoS data rx stream according to | |
1043 | * STA/TID and check if this STA/TID is on aggregation | |
1044 | */ | |
1045 | ||
1edfb1af | 1046 | if (!sta) |
2569a826 | 1047 | goto dont_reorder; |
1edfb1af | 1048 | |
6cc00d54 TP |
1049 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
1050 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
1051 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
1052 | ||
a87f736d JB |
1053 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
1054 | if (!tid_agg_rx) | |
1055 | goto dont_reorder; | |
1edfb1af JB |
1056 | |
1057 | /* qos null data frames are excluded */ | |
1058 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 1059 | goto dont_reorder; |
1edfb1af | 1060 | |
6cc00d54 TP |
1061 | /* not part of a BA session */ |
1062 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
1063 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
1064 | goto dont_reorder; | |
1065 | ||
1edfb1af JB |
1066 | /* new, potentially un-ordered, ampdu frame - process it */ |
1067 | ||
1068 | /* reset session timer */ | |
1069 | if (tid_agg_rx->timeout) | |
12d3952f | 1070 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
1071 | |
1072 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
1073 | sc = le16_to_cpu(hdr->seq_ctrl); | |
1074 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 1075 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
1076 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
1077 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 1078 | return; |
1edfb1af JB |
1079 | } |
1080 | ||
a87f736d JB |
1081 | /* |
1082 | * No locking needed -- we will only ever process one | |
1083 | * RX packet at a time, and thus own tid_agg_rx. All | |
1084 | * other code manipulating it needs to (and does) make | |
1085 | * sure that we cannot get to it any more before doing | |
1086 | * anything with it. | |
1087 | */ | |
f9e124fb CL |
1088 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
1089 | frames)) | |
2569a826 JB |
1090 | return; |
1091 | ||
1092 | dont_reorder: | |
f9e124fb | 1093 | __skb_queue_tail(frames, skb); |
1edfb1af | 1094 | } |
33b64eb2 | 1095 | |
49461622 | 1096 | static ieee80211_rx_result debug_noinline |
0395442a | 1097 | ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) |
571ecf67 | 1098 | { |
a7767f95 | 1099 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 1100 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1101 | |
6b0f3274 JB |
1102 | /* |
1103 | * Drop duplicate 802.11 retransmissions | |
1104 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
1105 | */ | |
0395442a JB |
1106 | |
1107 | if (rx->skb->len < 24) | |
1108 | return RX_CONTINUE; | |
1109 | ||
1110 | if (ieee80211_is_ctl(hdr->frame_control) || | |
1111 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
1112 | is_multicast_ether_addr(hdr->addr1)) | |
1113 | return RX_CONTINUE; | |
1114 | ||
a732fa70 JB |
1115 | if (!rx->sta) |
1116 | return RX_CONTINUE; | |
1117 | ||
1118 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && | |
1119 | rx->sta->last_seq_ctrl[rx->seqno_idx] == hdr->seq_ctrl)) { | |
1120 | I802_DEBUG_INC(rx->local->dot11FrameDuplicateCount); | |
e5a9f8d0 | 1121 | rx->sta->rx_stats.num_duplicates++; |
a732fa70 JB |
1122 | return RX_DROP_UNUSABLE; |
1123 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
1124 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; | |
571ecf67 JB |
1125 | } |
1126 | ||
0395442a JB |
1127 | return RX_CONTINUE; |
1128 | } | |
1129 | ||
1130 | static ieee80211_rx_result debug_noinline | |
1131 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) | |
1132 | { | |
1133 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
1134 | ||
571ecf67 JB |
1135 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1136 | * IEEE 802.11, Chap 5.5. | |
1137 | * | |
ccd7b362 JB |
1138 | * mac80211 filters only based on association state, i.e. it drops |
1139 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1140 | * deauth/disassoc frames when needed. In addition, hostapd is |
1141 | * responsible for filtering on both auth and assoc states. | |
1142 | */ | |
33b64eb2 | 1143 | |
902acc78 | 1144 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1145 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1146 | |
a7767f95 HH |
1147 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1148 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1149 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1150 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1151 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1152 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1153 | /* |
1154 | * accept port control frames from the AP even when it's not | |
1155 | * yet marked ASSOC to prevent a race where we don't set the | |
1156 | * assoc bit quickly enough before it sends the first frame | |
1157 | */ | |
1158 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1159 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1160 | unsigned int hdrlen; |
1161 | __be16 ethertype; | |
1162 | ||
1163 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1164 | ||
1165 | if (rx->skb->len < hdrlen + 8) | |
1166 | return RX_DROP_MONITOR; | |
1167 | ||
1168 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1169 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1170 | return RX_CONTINUE; |
1171 | } | |
21fc7560 JB |
1172 | |
1173 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1174 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1175 | hdr->addr2, | |
1176 | GFP_ATOMIC)) | |
1177 | return RX_DROP_UNUSABLE; | |
1178 | ||
e4c26add | 1179 | return RX_DROP_MONITOR; |
2a33bee2 | 1180 | } |
571ecf67 | 1181 | |
9ae54c84 | 1182 | return RX_CONTINUE; |
570bd537 JB |
1183 | } |
1184 | ||
1185 | ||
572e0012 KV |
1186 | static ieee80211_rx_result debug_noinline |
1187 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1188 | { | |
1189 | struct ieee80211_local *local; | |
1190 | struct ieee80211_hdr *hdr; | |
1191 | struct sk_buff *skb; | |
1192 | ||
1193 | local = rx->local; | |
1194 | skb = rx->skb; | |
1195 | hdr = (struct ieee80211_hdr *) skb->data; | |
1196 | ||
1197 | if (!local->pspolling) | |
1198 | return RX_CONTINUE; | |
1199 | ||
1200 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1201 | /* this is not from AP */ | |
1202 | return RX_CONTINUE; | |
1203 | ||
1204 | if (!ieee80211_is_data(hdr->frame_control)) | |
1205 | return RX_CONTINUE; | |
1206 | ||
1207 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1208 | /* AP has no more frames buffered for us */ | |
1209 | local->pspolling = false; | |
1210 | return RX_CONTINUE; | |
1211 | } | |
1212 | ||
1213 | /* more data bit is set, let's request a new frame from the AP */ | |
1214 | ieee80211_send_pspoll(local, rx->sdata); | |
1215 | ||
1216 | return RX_CONTINUE; | |
1217 | } | |
1218 | ||
d012a605 | 1219 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1220 | { |
133b8226 | 1221 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1222 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1223 | struct ps_data *ps; |
ba8c3d6f | 1224 | int tid; |
0795af57 | 1225 | |
d012a605 MP |
1226 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1227 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1228 | ps = &sdata->bss->ps; | |
1229 | else | |
1230 | return; | |
1231 | ||
1232 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1233 | set_sta_flag(sta, WLAN_STA_PS_STA); |
30686bf7 | 1234 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1235 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
bdcbd8e0 JB |
1236 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1237 | sta->sta.addr, sta->sta.aid); | |
ba8c3d6f | 1238 | |
17c18bf8 JB |
1239 | ieee80211_clear_fast_xmit(sta); |
1240 | ||
ba8c3d6f FF |
1241 | if (!sta->sta.txq[0]) |
1242 | return; | |
1243 | ||
1244 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
1245 | struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); | |
1246 | ||
1247 | if (!skb_queue_len(&txqi->queue)) | |
1248 | set_bit(tid, &sta->txq_buffered_tids); | |
1249 | else | |
1250 | clear_bit(tid, &sta->txq_buffered_tids); | |
1251 | } | |
571ecf67 JB |
1252 | } |
1253 | ||
d012a605 | 1254 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1255 | { |
bdcbd8e0 JB |
1256 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1257 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1258 | |
c2c98fde | 1259 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1260 | /* |
1261 | * Clear the flag only if the other one is still set | |
1262 | * so that the TX path won't start TX'ing new frames | |
1263 | * directly ... In the case that the driver flag isn't | |
1264 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1265 | */ | |
1266 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1267 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1268 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1269 | return; |
1270 | } | |
1271 | ||
5ac2e350 JB |
1272 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1273 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1274 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1275 | } |
1276 | ||
cf47161a | 1277 | int ieee80211_sta_ps_transition(struct ieee80211_sta *pubsta, bool start) |
d057e5a3 | 1278 | { |
cf47161a | 1279 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
d057e5a3 AN |
1280 | bool in_ps; |
1281 | ||
cf47161a | 1282 | WARN_ON(!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS)); |
d057e5a3 AN |
1283 | |
1284 | /* Don't let the same PS state be set twice */ | |
cf47161a | 1285 | in_ps = test_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1286 | if ((start && in_ps) || (!start && !in_ps)) |
1287 | return -EINVAL; | |
1288 | ||
1289 | if (start) | |
cf47161a | 1290 | sta_ps_start(sta); |
d057e5a3 | 1291 | else |
cf47161a | 1292 | sta_ps_end(sta); |
d057e5a3 AN |
1293 | |
1294 | return 0; | |
1295 | } | |
1296 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1297 | ||
47086fc5 JB |
1298 | static ieee80211_rx_result debug_noinline |
1299 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1300 | { | |
1301 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1302 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1303 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1304 | int tid, ac; | |
1305 | ||
5c90067c | 1306 | if (!rx->sta) |
47086fc5 JB |
1307 | return RX_CONTINUE; |
1308 | ||
1309 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1310 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1311 | return RX_CONTINUE; | |
1312 | ||
1313 | /* | |
1314 | * The device handles station powersave, so don't do anything about | |
1315 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1316 | * it to mac80211 since they're handled.) | |
1317 | */ | |
30686bf7 | 1318 | if (ieee80211_hw_check(&sdata->local->hw, AP_LINK_PS)) |
47086fc5 JB |
1319 | return RX_CONTINUE; |
1320 | ||
1321 | /* | |
1322 | * Don't do anything if the station isn't already asleep. In | |
1323 | * the uAPSD case, the station will probably be marked asleep, | |
1324 | * in the PS-Poll case the station must be confused ... | |
1325 | */ | |
c2c98fde | 1326 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1327 | return RX_CONTINUE; |
1328 | ||
1329 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1330 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1331 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1332 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1333 | else | |
c2c98fde | 1334 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1335 | } |
47086fc5 JB |
1336 | |
1337 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1338 | * count as an dropped frame. */ | |
1339 | dev_kfree_skb(rx->skb); | |
1340 | ||
1341 | return RX_QUEUED; | |
1342 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1343 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1344 | ieee80211_has_pm(hdr->frame_control) && | |
1345 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1346 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1347 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1348 | ac = ieee802_1d_to_ac[tid & 7]; | |
1349 | ||
1350 | /* | |
1351 | * If this AC is not trigger-enabled do nothing. | |
1352 | * | |
1353 | * NB: This could/should check a separate bitmap of trigger- | |
1354 | * enabled queues, but for now we only implement uAPSD w/o | |
1355 | * TSPEC changes to the ACs, so they're always the same. | |
1356 | */ | |
1357 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1358 | return RX_CONTINUE; | |
1359 | ||
1360 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1361 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1362 | return RX_CONTINUE; |
1363 | ||
c2c98fde | 1364 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1365 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1366 | else | |
c2c98fde | 1367 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1368 | } |
1369 | ||
1370 | return RX_CONTINUE; | |
1371 | } | |
1372 | ||
49461622 | 1373 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1374 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1375 | { |
1376 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1377 | struct sk_buff *skb = rx->skb; |
1378 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1379 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1380 | int i; |
571ecf67 JB |
1381 | |
1382 | if (!sta) | |
9ae54c84 | 1383 | return RX_CONTINUE; |
571ecf67 | 1384 | |
b291ba11 JB |
1385 | /* |
1386 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1387 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1388 | * current IBSS network alive in cases where other STAs start | |
1389 | * using different BSSID. This will also give the station another | |
1390 | * chance to restart the authentication/authorization in case | |
1391 | * something went wrong the first time. | |
b291ba11 | 1392 | */ |
05c914fe | 1393 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1394 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1395 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1396 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1397 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
e5a9f8d0 | 1398 | sta->rx_stats.last_rx = jiffies; |
f4ebddf9 HR |
1399 | if (ieee80211_is_data(hdr->frame_control) && |
1400 | !is_multicast_ether_addr(hdr->addr1)) { | |
e5a9f8d0 JB |
1401 | sta->rx_stats.last_rate_idx = |
1402 | status->rate_idx; | |
1403 | sta->rx_stats.last_rate_flag = | |
1404 | status->flag; | |
1405 | sta->rx_stats.last_rate_vht_flag = | |
1406 | status->vht_flag; | |
1407 | sta->rx_stats.last_rate_vht_nss = | |
1408 | status->vht_nss; | |
3af6334c FF |
1409 | } |
1410 | } | |
239281f8 | 1411 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
e5a9f8d0 | 1412 | sta->rx_stats.last_rx = jiffies; |
b291ba11 JB |
1413 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1414 | /* | |
33b64eb2 LCC |
1415 | * Mesh beacons will update last_rx when if they are found to |
1416 | * match the current local configuration when processed. | |
571ecf67 | 1417 | */ |
e5a9f8d0 | 1418 | sta->rx_stats.last_rx = jiffies; |
3af6334c | 1419 | if (ieee80211_is_data(hdr->frame_control)) { |
e5a9f8d0 JB |
1420 | sta->rx_stats.last_rate_idx = status->rate_idx; |
1421 | sta->rx_stats.last_rate_flag = status->flag; | |
1422 | sta->rx_stats.last_rate_vht_flag = status->vht_flag; | |
1423 | sta->rx_stats.last_rate_vht_nss = status->vht_nss; | |
3af6334c | 1424 | } |
571ecf67 JB |
1425 | } |
1426 | ||
3cf335d5 KV |
1427 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1428 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1429 | ||
e5a9f8d0 JB |
1430 | sta->rx_stats.fragments++; |
1431 | sta->rx_stats.bytes += rx->skb->len; | |
fe8431f8 | 1432 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
e5a9f8d0 JB |
1433 | sta->rx_stats.last_signal = status->signal; |
1434 | ewma_signal_add(&sta->rx_stats.avg_signal, -status->signal); | |
fe8431f8 | 1435 | } |
571ecf67 | 1436 | |
ef0621e8 | 1437 | if (status->chains) { |
e5a9f8d0 | 1438 | sta->rx_stats.chains = status->chains; |
ef0621e8 FF |
1439 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
1440 | int signal = status->chain_signal[i]; | |
1441 | ||
1442 | if (!(status->chains & BIT(i))) | |
1443 | continue; | |
1444 | ||
e5a9f8d0 JB |
1445 | sta->rx_stats.chain_signal_last[i] = signal; |
1446 | ewma_signal_add(&sta->rx_stats.chain_signal_avg[i], | |
1447 | -signal); | |
ef0621e8 FF |
1448 | } |
1449 | } | |
1450 | ||
72eaa43a JB |
1451 | /* |
1452 | * Change STA power saving mode only at the end of a frame | |
1453 | * exchange sequence. | |
1454 | */ | |
30686bf7 | 1455 | if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) && |
d057e5a3 | 1456 | !ieee80211_has_morefrags(hdr->frame_control) && |
4cfda47b | 1457 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1458 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1459 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1460 | /* PM bit is only checked in frames where it isn't reserved, | |
1461 | * in AP mode it's reserved in non-bufferable management frames | |
1462 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1463 | */ | |
1464 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1465 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1466 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1467 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1468 | sta_ps_end(sta); |
72eaa43a JB |
1469 | } else { |
1470 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1471 | sta_ps_start(sta); |
72eaa43a | 1472 | } |
571ecf67 JB |
1473 | } |
1474 | ||
3f52b7e3 MP |
1475 | /* mesh power save support */ |
1476 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1477 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1478 | ||
22403def JB |
1479 | /* |
1480 | * Drop (qos-)data::nullfunc frames silently, since they | |
1481 | * are used only to control station power saving mode. | |
1482 | */ | |
1483 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1484 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1485 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1486 | |
1487 | /* | |
1488 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1489 | * that was not moved to a 4-addr STA vlan yet send |
1490 | * the event to userspace and for older hostapd drop | |
1491 | * the frame to the monitor interface. | |
d524215f FF |
1492 | */ |
1493 | if (ieee80211_has_a4(hdr->frame_control) && | |
1494 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1495 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1496 | !rx->sdata->u.vlan.sta))) { |
1497 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1498 | cfg80211_rx_unexpected_4addr_frame( | |
1499 | rx->sdata->dev, sta->sta.addr, | |
1500 | GFP_ATOMIC); | |
d524215f | 1501 | return RX_DROP_MONITOR; |
e7f4a940 | 1502 | } |
22403def JB |
1503 | /* |
1504 | * Update counter and free packet here to avoid | |
1505 | * counting this as a dropped packed. | |
1506 | */ | |
e5a9f8d0 | 1507 | sta->rx_stats.packets++; |
571ecf67 | 1508 | dev_kfree_skb(rx->skb); |
9ae54c84 | 1509 | return RX_QUEUED; |
571ecf67 JB |
1510 | } |
1511 | ||
9ae54c84 | 1512 | return RX_CONTINUE; |
571ecf67 JB |
1513 | } /* ieee80211_rx_h_sta_process */ |
1514 | ||
86c228a7 JA |
1515 | static ieee80211_rx_result debug_noinline |
1516 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1517 | { | |
1518 | struct sk_buff *skb = rx->skb; | |
1519 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1520 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1521 | int keyidx; | |
1522 | int hdrlen; | |
1523 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1524 | struct ieee80211_key *sta_ptk = NULL; | |
1525 | int mmie_keyidx = -1; | |
1526 | __le16 fc; | |
2475b1cc | 1527 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1528 | |
1529 | /* | |
1530 | * Key selection 101 | |
1531 | * | |
1532 | * There are four types of keys: | |
1533 | * - GTK (group keys) | |
1534 | * - IGTK (group keys for management frames) | |
1535 | * - PTK (pairwise keys) | |
1536 | * - STK (station-to-station pairwise keys) | |
1537 | * | |
1538 | * When selecting a key, we have to distinguish between multicast | |
1539 | * (including broadcast) and unicast frames, the latter can only | |
1540 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1541 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1542 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1543 | * don't have a PTK/STK we check the key index for a WEP key. | |
1544 | * | |
1545 | * Note that in a regular BSS, multicast frames are sent by the | |
1546 | * AP only, associated stations unicast the frame to the AP first | |
1547 | * which then multicasts it on their behalf. | |
1548 | * | |
1549 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1550 | * with each station, that is something we don't currently handle. | |
1551 | * The spec seems to expect that one negotiates the same key with | |
1552 | * every station but there's no such requirement; VLANs could be | |
1553 | * possible. | |
1554 | */ | |
1555 | ||
86c228a7 JA |
1556 | /* start without a key */ |
1557 | rx->key = NULL; | |
2475b1cc | 1558 | fc = hdr->frame_control; |
86c228a7 | 1559 | |
2475b1cc MS |
1560 | if (rx->sta) { |
1561 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1562 | |
2475b1cc MS |
1563 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1564 | cs = rx->sta->cipher_scheme; | |
1565 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1566 | if (unlikely(keyid < 0)) | |
1567 | return RX_DROP_UNUSABLE; | |
1568 | } | |
1569 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1570 | } | |
86c228a7 JA |
1571 | |
1572 | if (!ieee80211_has_protected(fc)) | |
1573 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1574 | ||
1575 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1576 | rx->key = sta_ptk; | |
1577 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1578 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1579 | return RX_CONTINUE; | |
1580 | /* Skip decryption if the frame is not protected. */ | |
1581 | if (!ieee80211_has_protected(fc)) | |
1582 | return RX_CONTINUE; | |
1583 | } else if (mmie_keyidx >= 0) { | |
1584 | /* Broadcast/multicast robust management frame / BIP */ | |
1585 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1586 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1587 | return RX_CONTINUE; | |
1588 | ||
1589 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1590 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1591 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1592 | if (rx->sta) | |
1593 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1594 | if (!rx->key) | |
1595 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1596 | } else if (!ieee80211_has_protected(fc)) { | |
1597 | /* | |
1598 | * The frame was not protected, so skip decryption. However, we | |
1599 | * need to set rx->key if there is a key that could have been | |
1600 | * used so that the frame may be dropped if encryption would | |
1601 | * have been expected. | |
1602 | */ | |
1603 | struct ieee80211_key *key = NULL; | |
1604 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1605 | int i; | |
1606 | ||
1607 | if (ieee80211_is_mgmt(fc) && | |
1608 | is_multicast_ether_addr(hdr->addr1) && | |
1609 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1610 | rx->key = key; | |
1611 | else { | |
1612 | if (rx->sta) { | |
1613 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1614 | key = rcu_dereference(rx->sta->gtk[i]); | |
1615 | if (key) | |
1616 | break; | |
1617 | } | |
1618 | } | |
1619 | if (!key) { | |
1620 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1621 | key = rcu_dereference(sdata->keys[i]); | |
1622 | if (key) | |
1623 | break; | |
1624 | } | |
1625 | } | |
1626 | if (key) | |
1627 | rx->key = key; | |
1628 | } | |
1629 | return RX_CONTINUE; | |
1630 | } else { | |
1631 | u8 keyid; | |
2475b1cc | 1632 | |
86c228a7 JA |
1633 | /* |
1634 | * The device doesn't give us the IV so we won't be | |
1635 | * able to look up the key. That's ok though, we | |
1636 | * don't need to decrypt the frame, we just won't | |
1637 | * be able to keep statistics accurate. | |
1638 | * Except for key threshold notifications, should | |
1639 | * we somehow allow the driver to tell us which key | |
1640 | * the hardware used if this flag is set? | |
1641 | */ | |
1642 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1643 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1644 | return RX_CONTINUE; | |
1645 | ||
1646 | hdrlen = ieee80211_hdrlen(fc); | |
1647 | ||
2475b1cc MS |
1648 | if (cs) { |
1649 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1650 | |
2475b1cc MS |
1651 | if (unlikely(keyidx < 0)) |
1652 | return RX_DROP_UNUSABLE; | |
1653 | } else { | |
1654 | if (rx->skb->len < 8 + hdrlen) | |
1655 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1656 | /* | |
1657 | * no need to call ieee80211_wep_get_keyidx, | |
1658 | * it verifies a bunch of things we've done already | |
1659 | */ | |
1660 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1661 | keyidx = keyid >> 6; | |
1662 | } | |
86c228a7 JA |
1663 | |
1664 | /* check per-station GTK first, if multicast packet */ | |
1665 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1666 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1667 | ||
1668 | /* if not found, try default key */ | |
1669 | if (!rx->key) { | |
1670 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1671 | ||
1672 | /* | |
1673 | * RSNA-protected unicast frames should always be | |
1674 | * sent with pairwise or station-to-station keys, | |
1675 | * but for WEP we allow using a key index as well. | |
1676 | */ | |
1677 | if (rx->key && | |
1678 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1679 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1680 | !is_multicast_ether_addr(hdr->addr1)) | |
1681 | rx->key = NULL; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | if (rx->key) { | |
1686 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1687 | return RX_DROP_MONITOR; | |
1688 | ||
86c228a7 JA |
1689 | /* TODO: add threshold stuff again */ |
1690 | } else { | |
1691 | return RX_DROP_MONITOR; | |
1692 | } | |
1693 | ||
1694 | switch (rx->key->conf.cipher) { | |
1695 | case WLAN_CIPHER_SUITE_WEP40: | |
1696 | case WLAN_CIPHER_SUITE_WEP104: | |
1697 | result = ieee80211_crypto_wep_decrypt(rx); | |
1698 | break; | |
1699 | case WLAN_CIPHER_SUITE_TKIP: | |
1700 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1701 | break; | |
1702 | case WLAN_CIPHER_SUITE_CCMP: | |
2b2ba0db JM |
1703 | result = ieee80211_crypto_ccmp_decrypt( |
1704 | rx, IEEE80211_CCMP_MIC_LEN); | |
1705 | break; | |
1706 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1707 | result = ieee80211_crypto_ccmp_decrypt( | |
1708 | rx, IEEE80211_CCMP_256_MIC_LEN); | |
86c228a7 JA |
1709 | break; |
1710 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1711 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1712 | break; | |
56c52da2 JM |
1713 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1714 | result = ieee80211_crypto_aes_cmac_256_decrypt(rx); | |
1715 | break; | |
8ade538b JM |
1716 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1717 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1718 | result = ieee80211_crypto_aes_gmac_decrypt(rx); | |
1719 | break; | |
00b9cfa3 JM |
1720 | case WLAN_CIPHER_SUITE_GCMP: |
1721 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1722 | result = ieee80211_crypto_gcmp_decrypt(rx); | |
1723 | break; | |
86c228a7 | 1724 | default: |
2475b1cc | 1725 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1726 | } |
1727 | ||
1728 | /* the hdr variable is invalid after the decrypt handlers */ | |
1729 | ||
1730 | /* either the frame has been decrypted or will be dropped */ | |
1731 | status->flag |= RX_FLAG_DECRYPTED; | |
1732 | ||
1733 | return result; | |
1734 | } | |
1735 | ||
571ecf67 JB |
1736 | static inline struct ieee80211_fragment_entry * |
1737 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1738 | unsigned int frag, unsigned int seq, int rx_queue, | |
1739 | struct sk_buff **skb) | |
1740 | { | |
1741 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1742 | |
571ecf67 JB |
1743 | entry = &sdata->fragments[sdata->fragment_next++]; |
1744 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1745 | sdata->fragment_next = 0; | |
1746 | ||
bdcbd8e0 | 1747 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1748 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1749 | |
1750 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1751 | *skb = NULL; | |
1752 | entry->first_frag_time = jiffies; | |
1753 | entry->seq = seq; | |
1754 | entry->rx_queue = rx_queue; | |
1755 | entry->last_frag = frag; | |
1756 | entry->ccmp = 0; | |
1757 | entry->extra_len = 0; | |
1758 | ||
1759 | return entry; | |
1760 | } | |
1761 | ||
1762 | static inline struct ieee80211_fragment_entry * | |
1763 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1764 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1765 | int rx_queue, struct ieee80211_hdr *hdr) |
1766 | { | |
1767 | struct ieee80211_fragment_entry *entry; | |
1768 | int i, idx; | |
1769 | ||
1770 | idx = sdata->fragment_next; | |
1771 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1772 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1773 | |
1774 | idx--; | |
1775 | if (idx < 0) | |
1776 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1777 | ||
1778 | entry = &sdata->fragments[idx]; | |
1779 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1780 | entry->rx_queue != rx_queue || | |
1781 | entry->last_frag + 1 != frag) | |
1782 | continue; | |
1783 | ||
b73d70ad | 1784 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1785 | |
b73d70ad HH |
1786 | /* |
1787 | * Check ftype and addresses are equal, else check next fragment | |
1788 | */ | |
1789 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1790 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1791 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1792 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1793 | continue; |
1794 | ||
ab46623e | 1795 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1796 | __skb_queue_purge(&entry->skb_list); |
1797 | continue; | |
1798 | } | |
1799 | return entry; | |
1800 | } | |
1801 | ||
1802 | return NULL; | |
1803 | } | |
1804 | ||
49461622 | 1805 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1806 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1807 | { |
1808 | struct ieee80211_hdr *hdr; | |
1809 | u16 sc; | |
358c8d9d | 1810 | __le16 fc; |
571ecf67 JB |
1811 | unsigned int frag, seq; |
1812 | struct ieee80211_fragment_entry *entry; | |
1813 | struct sk_buff *skb; | |
554891e6 | 1814 | struct ieee80211_rx_status *status; |
571ecf67 | 1815 | |
b73d70ad | 1816 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1817 | fc = hdr->frame_control; |
f7fbf70e JC |
1818 | |
1819 | if (ieee80211_is_ctl(fc)) | |
1820 | return RX_CONTINUE; | |
1821 | ||
571ecf67 JB |
1822 | sc = le16_to_cpu(hdr->seq_ctrl); |
1823 | frag = sc & IEEE80211_SCTL_FRAG; | |
1824 | ||
b8fff407 | 1825 | if (is_multicast_ether_addr(hdr->addr1)) { |
c206ca67 | 1826 | I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount); |
d025933e | 1827 | goto out_no_led; |
571ecf67 | 1828 | } |
b8fff407 | 1829 | |
d025933e AM |
1830 | if (likely(!ieee80211_has_morefrags(fc) && frag == 0)) |
1831 | goto out; | |
1832 | ||
571ecf67 JB |
1833 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
1834 | ||
e3cf8b3f ZY |
1835 | if (skb_linearize(rx->skb)) |
1836 | return RX_DROP_UNUSABLE; | |
1837 | ||
058897a4 AK |
1838 | /* |
1839 | * skb_linearize() might change the skb->data and | |
1840 | * previously cached variables (in this case, hdr) need to | |
1841 | * be refreshed with the new data. | |
1842 | */ | |
1843 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1844 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1845 | ||
1846 | if (frag == 0) { | |
1847 | /* This is the first fragment of a new frame. */ | |
1848 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1849 | rx->seqno_idx, &(rx->skb)); |
2b2ba0db JM |
1850 | if (rx->key && |
1851 | (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP || | |
1852 | rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256) && | |
358c8d9d | 1853 | ieee80211_has_protected(fc)) { |
9e26297a | 1854 | int queue = rx->security_idx; |
571ecf67 JB |
1855 | /* Store CCMP PN so that we can verify that the next |
1856 | * fragment has a sequential PN value. */ | |
1857 | entry->ccmp = 1; | |
1858 | memcpy(entry->last_pn, | |
9190252c | 1859 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1860 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1861 | } |
9ae54c84 | 1862 | return RX_QUEUED; |
571ecf67 JB |
1863 | } |
1864 | ||
1865 | /* This is a fragment for a frame that should already be pending in | |
1866 | * fragment cache. Add this fragment to the end of the pending entry. | |
1867 | */ | |
9e26297a JB |
1868 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1869 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1870 | if (!entry) { |
1871 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1872 | return RX_DROP_MONITOR; |
571ecf67 JB |
1873 | } |
1874 | ||
1875 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1876 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1877 | if (entry->ccmp) { | |
1878 | int i; | |
4325f6ca | 1879 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1880 | int queue; |
2b2ba0db JM |
1881 | if (!rx->key || |
1882 | (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP && | |
1883 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256)) | |
e4c26add | 1884 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1885 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1886 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1887 | pn[i]++; |
1888 | if (pn[i]) | |
1889 | break; | |
1890 | } | |
9e26297a | 1891 | queue = rx->security_idx; |
9190252c | 1892 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1893 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1894 | return RX_DROP_UNUSABLE; |
4325f6ca | 1895 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1896 | } |
1897 | ||
358c8d9d | 1898 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1899 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1900 | entry->last_frag = frag; | |
1901 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1902 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1903 | rx->skb = NULL; |
9ae54c84 | 1904 | return RX_QUEUED; |
571ecf67 JB |
1905 | } |
1906 | ||
1907 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1908 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
f1160434 | 1909 | I802_DEBUG_INC(rx->local->rx_expand_skb_head_defrag); |
571ecf67 JB |
1910 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
1911 | GFP_ATOMIC))) { | |
1912 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1913 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1914 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1915 | } |
1916 | } | |
1917 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1918 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1919 | dev_kfree_skb(skb); | |
1920 | } | |
1921 | ||
1922 | /* Complete frame has been reassembled - process it now */ | |
554891e6 | 1923 | status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 JB |
1924 | |
1925 | out: | |
d025933e AM |
1926 | ieee80211_led_rx(rx->local); |
1927 | out_no_led: | |
571ecf67 | 1928 | if (rx->sta) |
e5a9f8d0 | 1929 | rx->sta->rx_stats.packets++; |
9ae54c84 | 1930 | return RX_CONTINUE; |
571ecf67 JB |
1931 | } |
1932 | ||
1df332e8 | 1933 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1934 | { |
1df332e8 | 1935 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1936 | return -EACCES; |
571ecf67 | 1937 | |
76ee65bf | 1938 | return 0; |
571ecf67 JB |
1939 | } |
1940 | ||
1df332e8 | 1941 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1942 | { |
eb9fb5b8 JB |
1943 | struct sk_buff *skb = rx->skb; |
1944 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1945 | ||
3017b80b | 1946 | /* |
7848ba7d JB |
1947 | * Pass through unencrypted frames if the hardware has |
1948 | * decrypted them already. | |
3017b80b | 1949 | */ |
eb9fb5b8 | 1950 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1951 | return 0; |
571ecf67 JB |
1952 | |
1953 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1954 | if (unlikely(!ieee80211_has_protected(fc) && |
1955 | !ieee80211_is_nullfunc(fc) && | |
e8f4fb7c | 1956 | ieee80211_is_data(fc) && rx->key)) |
76ee65bf | 1957 | return -EACCES; |
bef5d1c7 JB |
1958 | |
1959 | return 0; | |
1960 | } | |
1961 | ||
1df332e8 | 1962 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1963 | { |
1964 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1965 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1966 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1967 | |
e3efca0a JM |
1968 | /* |
1969 | * Pass through unencrypted frames if the hardware has | |
1970 | * decrypted them already. | |
1971 | */ | |
1972 | if (status->flag & RX_FLAG_DECRYPTED) | |
1973 | return 0; | |
bef5d1c7 | 1974 | |
c2c98fde | 1975 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1976 | if (unlikely(!ieee80211_has_protected(fc) && |
1977 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1978 | rx->key)) { |
6ff57cf8 JB |
1979 | if (ieee80211_is_deauth(fc) || |
1980 | ieee80211_is_disassoc(fc)) | |
1981 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1982 | rx->skb->data, | |
1983 | rx->skb->len); | |
f2ca3ea4 | 1984 | return -EACCES; |
cf4e594e | 1985 | } |
f2ca3ea4 | 1986 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1987 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1988 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1989 | if (ieee80211_is_deauth(fc) || |
1990 | ieee80211_is_disassoc(fc)) | |
1991 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1992 | rx->skb->data, | |
1993 | rx->skb->len); | |
f2ca3ea4 | 1994 | return -EACCES; |
cf4e594e | 1995 | } |
f2ca3ea4 JM |
1996 | /* |
1997 | * When using MFP, Action frames are not allowed prior to | |
1998 | * having configured keys. | |
1999 | */ | |
2000 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 2001 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
2002 | return -EACCES; |
2003 | } | |
b3fc9c6c | 2004 | |
76ee65bf | 2005 | return 0; |
571ecf67 JB |
2006 | } |
2007 | ||
76ee65bf | 2008 | static int |
4114fa21 | 2009 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 2010 | { |
eb9fb5b8 | 2011 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 2012 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
2013 | bool check_port_control = false; |
2014 | struct ethhdr *ehdr; | |
2015 | int ret; | |
f14543ee | 2016 | |
4114fa21 | 2017 | *port_control = false; |
9bc383de JB |
2018 | if (ieee80211_has_a4(hdr->frame_control) && |
2019 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 2020 | return -1; |
9bc383de | 2021 | |
fbb327c5 FF |
2022 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
2023 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
2024 | ||
2025 | if (!sdata->u.mgd.use_4addr) | |
2026 | return -1; | |
2027 | else | |
2028 | check_port_control = true; | |
2029 | } | |
2030 | ||
9bc383de | 2031 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 2032 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 2033 | return -1; |
571ecf67 | 2034 | |
fbb327c5 | 2035 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 2036 | if (ret < 0) |
fbb327c5 FF |
2037 | return ret; |
2038 | ||
2039 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
2040 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
2041 | *port_control = true; | |
2042 | else if (check_port_control) | |
fbb327c5 FF |
2043 | return -1; |
2044 | ||
2045 | return 0; | |
76ee65bf | 2046 | } |
571ecf67 | 2047 | |
ce3edf6d JB |
2048 | /* |
2049 | * requires that rx->skb is a frame with ethernet header | |
2050 | */ | |
358c8d9d | 2051 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 2052 | { |
c97c23e3 | 2053 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
2054 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
2055 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
2056 | ||
2057 | /* | |
2058 | * Allow EAPOL frames to us/the PAE group address regardless | |
2059 | * of whether the frame was encrypted or not. | |
2060 | */ | |
a621fa4d | 2061 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
2062 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
2063 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
2064 | return true; |
2065 | ||
2066 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 2067 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
2068 | return false; |
2069 | ||
2070 | return true; | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * requires that rx->skb is a frame with ethernet header | |
2075 | */ | |
76ee65bf | 2076 | static void |
5cf121c3 | 2077 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 2078 | { |
eb9fb5b8 JB |
2079 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
2080 | struct net_device *dev = sdata->dev; | |
76ee65bf | 2081 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
2082 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
2083 | struct sta_info *dsta; | |
571ecf67 | 2084 | |
76ee65bf RR |
2085 | skb = rx->skb; |
2086 | xmit_skb = NULL; | |
571ecf67 | 2087 | |
5a490510 JB |
2088 | ieee80211_rx_stats(dev, skb->len); |
2089 | ||
05c914fe JB |
2090 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
2091 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 2092 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
9bc383de | 2093 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
2094 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
2095 | /* | |
2096 | * send multicast frames both to higher layers in | |
2097 | * local net stack and back to the wireless medium | |
2098 | */ | |
76ee65bf | 2099 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 2100 | if (!xmit_skb) |
bdcbd8e0 | 2101 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 2102 | dev->name); |
571ecf67 | 2103 | } else { |
abe60632 JB |
2104 | dsta = sta_info_get(sdata, skb->data); |
2105 | if (dsta) { | |
ce3edf6d JB |
2106 | /* |
2107 | * The destination station is associated to | |
2108 | * this AP (in this VLAN), so send the frame | |
2109 | * directly to it and do not pass it to local | |
2110 | * net stack. | |
571ecf67 | 2111 | */ |
76ee65bf | 2112 | xmit_skb = skb; |
571ecf67 JB |
2113 | skb = NULL; |
2114 | } | |
571ecf67 JB |
2115 | } |
2116 | } | |
2117 | ||
59d9cb07 | 2118 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
2119 | if (skb) { |
2120 | /* 'align' will only take the values 0 or 2 here since all | |
2121 | * frames are required to be aligned to 2-byte boundaries | |
2122 | * when being passed to mac80211; the code here works just | |
2123 | * as well if that isn't true, but mac80211 assumes it can | |
2124 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 2125 | */ |
9e890a1f JB |
2126 | int align; |
2127 | ||
2128 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
2129 | if (align) { |
2130 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
2131 | dev_kfree_skb(skb); | |
2132 | skb = NULL; | |
2133 | } else { | |
2134 | u8 *data = skb->data; | |
8ce0b589 ZY |
2135 | size_t len = skb_headlen(skb); |
2136 | skb->data -= align; | |
2137 | memmove(skb->data, data, len); | |
2138 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
2139 | } |
2140 | } | |
9e890a1f | 2141 | } |
d1c3a37c JB |
2142 | #endif |
2143 | ||
9e890a1f JB |
2144 | if (skb) { |
2145 | /* deliver to local stack */ | |
2146 | skb->protocol = eth_type_trans(skb, dev); | |
2147 | memset(skb->cb, 0, sizeof(skb->cb)); | |
af9f9b22 JB |
2148 | if (rx->napi) |
2149 | napi_gro_receive(rx->napi, skb); | |
06d181a8 JB |
2150 | else |
2151 | netif_receive_skb(skb); | |
571ecf67 JB |
2152 | } |
2153 | ||
76ee65bf | 2154 | if (xmit_skb) { |
aef6c928 HS |
2155 | /* |
2156 | * Send to wireless media and increase priority by 256 to | |
2157 | * keep the received priority instead of reclassifying | |
2158 | * the frame (see cfg80211_classify8021d). | |
2159 | */ | |
2160 | xmit_skb->priority += 256; | |
f831e909 | 2161 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2162 | skb_reset_network_header(xmit_skb); |
2163 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2164 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2165 | } |
76ee65bf RR |
2166 | } |
2167 | ||
49461622 | 2168 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2169 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2170 | { |
eb9fb5b8 | 2171 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2172 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2173 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2174 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2175 | struct sk_buff_head frame_list; |
554891e6 | 2176 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2177 | |
358c8d9d | 2178 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2179 | return RX_CONTINUE; |
fd4c7f2f | 2180 | |
358c8d9d | 2181 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2182 | return RX_DROP_MONITOR; |
fd4c7f2f | 2183 | |
554891e6 | 2184 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2185 | return RX_CONTINUE; |
fd4c7f2f | 2186 | |
eaf85ca7 ZY |
2187 | if (ieee80211_has_a4(hdr->frame_control) && |
2188 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2189 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2190 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2191 | |
eaf85ca7 ZY |
2192 | if (is_multicast_ether_addr(hdr->addr1) && |
2193 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2194 | rx->sdata->u.vlan.sta) || | |
2195 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2196 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2197 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2198 | |
eaf85ca7 ZY |
2199 | skb->dev = dev; |
2200 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2201 | |
e3cf8b3f ZY |
2202 | if (skb_linearize(skb)) |
2203 | return RX_DROP_UNUSABLE; | |
2204 | ||
eaf85ca7 ZY |
2205 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2206 | rx->sdata->vif.type, | |
8b3becad | 2207 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2208 | |
eaf85ca7 ZY |
2209 | while (!skb_queue_empty(&frame_list)) { |
2210 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2211 | |
358c8d9d | 2212 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2213 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2214 | continue; |
2215 | } | |
fd4c7f2f RR |
2216 | |
2217 | ieee80211_deliver_skb(rx); | |
2218 | } | |
2219 | ||
9ae54c84 | 2220 | return RX_QUEUED; |
fd4c7f2f RR |
2221 | } |
2222 | ||
bf94e17b | 2223 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2224 | static ieee80211_rx_result |
e32f85f7 LCC |
2225 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2226 | { | |
30789eb6 TP |
2227 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2228 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2229 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2230 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2231 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2232 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
30789eb6 | 2233 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2234 | u16 q, hdrlen; |
e32f85f7 LCC |
2235 | |
2236 | hdr = (struct ieee80211_hdr *) skb->data; | |
2237 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2238 | |
2239 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2240 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2241 | return RX_DROP_MONITOR; | |
2242 | ||
2243 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2244 | ||
2245 | /* make sure full mesh header is there, also checks skb len */ | |
2246 | if (!pskb_may_pull(rx->skb, | |
2247 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2248 | return RX_DROP_MONITOR; | |
2249 | ||
2250 | /* reload pointers */ | |
2251 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2252 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2253 | ||
d0c22119 BC |
2254 | if (ieee80211_drop_unencrypted(rx, hdr->frame_control)) |
2255 | return RX_DROP_MONITOR; | |
2256 | ||
2157fdd6 TP |
2257 | /* frame is in RMC, don't forward */ |
2258 | if (ieee80211_is_data(hdr->frame_control) && | |
2259 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2260 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2261 | return RX_DROP_MONITOR; |
2262 | ||
5c90067c | 2263 | if (!ieee80211_is_data(hdr->frame_control)) |
e32f85f7 LCC |
2264 | return RX_CONTINUE; |
2265 | ||
2266 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2267 | return RX_DROP_MONITOR; |
2268 | ||
43b7b314 | 2269 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2270 | struct mesh_path *mppath; |
43b7b314 JC |
2271 | char *proxied_addr; |
2272 | char *mpp_addr; | |
2273 | ||
2274 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2275 | mpp_addr = hdr->addr3; | |
2276 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2277 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2278 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2279 | mpp_addr = hdr->addr4; |
2280 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2281 | } else { |
2282 | return RX_DROP_MONITOR; | |
43b7b314 | 2283 | } |
79617dee | 2284 | |
79617dee | 2285 | rcu_read_lock(); |
bf7cd94d | 2286 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2287 | if (!mppath) { |
bf7cd94d | 2288 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2289 | } else { |
2290 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2291 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2292 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2293 | spin_unlock_bh(&mppath->state_lock); |
2294 | } | |
2295 | rcu_read_unlock(); | |
2296 | } | |
2297 | ||
3c5772a5 JC |
2298 | /* Frame has reached destination. Don't forward */ |
2299 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2300 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2301 | return RX_CONTINUE; |
2302 | ||
00e96dec | 2303 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2304 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2305 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2306 | return RX_DROP_MONITOR; |
2307 | } | |
2308 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2309 | |
30789eb6 TP |
2310 | if (!--mesh_hdr->ttl) { |
2311 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2312 | goto out; |
30789eb6 TP |
2313 | } |
2314 | ||
d665508b CYY |
2315 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2316 | goto out; | |
2317 | ||
30789eb6 TP |
2318 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2319 | if (!fwd_skb) { | |
bdcbd8e0 | 2320 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2321 | sdata->name); |
30789eb6 TP |
2322 | goto out; |
2323 | } | |
2324 | ||
2325 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2326 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2327 | info = IEEE80211_SKB_CB(fwd_skb); |
2328 | memset(info, 0, sizeof(*info)); | |
2329 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2330 | info->control.vif = &rx->sdata->vif; | |
2331 | info->control.jiffies = jiffies; | |
2332 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2333 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2334 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2335 | /* update power mode indication when forwarding */ |
2336 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2337 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2338 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2339 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2340 | } else { | |
2341 | /* unable to resolve next hop */ | |
bf7cd94d | 2342 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2343 | fwd_hdr->addr3, 0, |
2344 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2345 | fwd_hdr->addr2); | |
30789eb6 | 2346 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2347 | kfree_skb(fwd_skb); |
30789eb6 | 2348 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2349 | } |
2350 | ||
30789eb6 TP |
2351 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2352 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2353 | out: |
df140465 | 2354 | if (is_multicast_ether_addr(hdr->addr1)) |
e32f85f7 | 2355 | return RX_CONTINUE; |
df140465 | 2356 | return RX_DROP_MONITOR; |
e32f85f7 | 2357 | } |
bf94e17b | 2358 | #endif |
e32f85f7 | 2359 | |
49461622 | 2360 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2361 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2362 | { |
eb9fb5b8 | 2363 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2364 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2365 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2366 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2367 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2368 | bool port_control; |
ce3edf6d | 2369 | int err; |
76ee65bf | 2370 | |
358c8d9d | 2371 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2372 | return RX_CONTINUE; |
76ee65bf | 2373 | |
358c8d9d | 2374 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2375 | return RX_DROP_MONITOR; |
76ee65bf | 2376 | |
79c892b8 | 2377 | if (rx->sta) { |
3d6dc343 | 2378 | /* The seqno index has the same property as needed |
79c892b8 JB |
2379 | * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS |
2380 | * for non-QoS-data frames. Here we know it's a data | |
2381 | * frame, so count MSDUs. | |
2382 | */ | |
e5a9f8d0 | 2383 | rx->sta->rx_stats.msdu[rx->seqno_idx]++; |
79c892b8 JB |
2384 | } |
2385 | ||
f14543ee | 2386 | /* |
e7f4a940 JB |
2387 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2388 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2389 | */ |
2390 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2391 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2392 | if (rx->sta && | |
2393 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2394 | cfg80211_rx_unexpected_4addr_frame( | |
2395 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2396 | return RX_DROP_MONITOR; |
e7f4a940 | 2397 | } |
f14543ee | 2398 | |
4114fa21 | 2399 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2400 | if (unlikely(err)) |
e4c26add | 2401 | return RX_DROP_UNUSABLE; |
76ee65bf | 2402 | |
358c8d9d | 2403 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2404 | return RX_DROP_MONITOR; |
ce3edf6d | 2405 | |
8a4d32f3 AN |
2406 | /* directly handle TDLS channel switch requests/responses */ |
2407 | if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == | |
2408 | cpu_to_be16(ETH_P_TDLS))) { | |
2409 | struct ieee80211_tdls_data *tf = (void *)rx->skb->data; | |
2410 | ||
2411 | if (pskb_may_pull(rx->skb, | |
2412 | offsetof(struct ieee80211_tdls_data, u)) && | |
2413 | tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && | |
2414 | tf->category == WLAN_CATEGORY_TDLS && | |
2415 | (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || | |
2416 | tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { | |
c8ff71e6 AN |
2417 | skb_queue_tail(&local->skb_queue_tdls_chsw, rx->skb); |
2418 | schedule_work(&local->tdls_chsw_work); | |
8a4d32f3 | 2419 | if (rx->sta) |
e5a9f8d0 | 2420 | rx->sta->rx_stats.packets++; |
8a4d32f3 AN |
2421 | |
2422 | return RX_QUEUED; | |
2423 | } | |
2424 | } | |
2425 | ||
4114fa21 FF |
2426 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2427 | unlikely(port_control) && sdata->bss) { | |
2428 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2429 | u.ap); | |
2430 | dev = sdata->dev; | |
2431 | rx->sdata = sdata; | |
2432 | } | |
2433 | ||
76ee65bf RR |
2434 | rx->skb->dev = dev; |
2435 | ||
08ca944e | 2436 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2437 | !is_multicast_ether_addr( |
2438 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2439 | (!local->scanning && | |
2440 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2441 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2442 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2443 | } | |
2444 | ||
76ee65bf | 2445 | ieee80211_deliver_skb(rx); |
571ecf67 | 2446 | |
9ae54c84 | 2447 | return RX_QUEUED; |
571ecf67 JB |
2448 | } |
2449 | ||
49461622 | 2450 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2451 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2452 | { |
71364716 | 2453 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2454 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2455 | struct tid_ampdu_rx *tid_agg_rx; |
2456 | u16 start_seq_num; | |
2457 | u16 tid; | |
2458 | ||
a7767f95 | 2459 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2460 | return RX_CONTINUE; |
71364716 | 2461 | |
a7767f95 | 2462 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2463 | struct { |
2464 | __le16 control, start_seq_num; | |
2465 | } __packed bar_data; | |
6382246e EG |
2466 | struct ieee80211_event event = { |
2467 | .type = BAR_RX_EVENT, | |
2468 | }; | |
8ae5977f | 2469 | |
71364716 | 2470 | if (!rx->sta) |
a02ae758 | 2471 | return RX_DROP_MONITOR; |
8ae5977f JB |
2472 | |
2473 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2474 | &bar_data, sizeof(bar_data))) | |
2475 | return RX_DROP_MONITOR; | |
2476 | ||
8ae5977f | 2477 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2478 | |
2479 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2480 | if (!tid_agg_rx) | |
a02ae758 | 2481 | return RX_DROP_MONITOR; |
71364716 | 2482 | |
8ae5977f | 2483 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
6382246e EG |
2484 | event.u.ba.tid = tid; |
2485 | event.u.ba.ssn = start_seq_num; | |
2486 | event.u.ba.sta = &rx->sta->sta; | |
71364716 RR |
2487 | |
2488 | /* reset session timer */ | |
20ad19d0 JB |
2489 | if (tid_agg_rx->timeout) |
2490 | mod_timer(&tid_agg_rx->session_timer, | |
2491 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2492 | |
dd318575 | 2493 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2494 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2495 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2496 | start_seq_num, frames); |
dd318575 JB |
2497 | spin_unlock(&tid_agg_rx->reorder_lock); |
2498 | ||
6382246e EG |
2499 | drv_event_callback(rx->local, rx->sdata, &event); |
2500 | ||
a02ae758 JB |
2501 | kfree_skb(skb); |
2502 | return RX_QUEUED; | |
71364716 RR |
2503 | } |
2504 | ||
08daecae JB |
2505 | /* |
2506 | * After this point, we only want management frames, | |
2507 | * so we can drop all remaining control frames to | |
2508 | * cooked monitor interfaces. | |
2509 | */ | |
2510 | return RX_DROP_MONITOR; | |
71364716 RR |
2511 | } |
2512 | ||
f4f727a6 JM |
2513 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2514 | struct ieee80211_mgmt *mgmt, | |
2515 | size_t len) | |
fea14732 JM |
2516 | { |
2517 | struct ieee80211_local *local = sdata->local; | |
2518 | struct sk_buff *skb; | |
2519 | struct ieee80211_mgmt *resp; | |
2520 | ||
b203ca39 | 2521 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2522 | /* Not to own unicast address */ |
2523 | return; | |
2524 | } | |
2525 | ||
b203ca39 JP |
2526 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2527 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2528 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2529 | return; |
2530 | } | |
2531 | ||
2532 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2533 | /* Too short SA Query request frame */ | |
2534 | return; | |
2535 | } | |
2536 | ||
2537 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2538 | if (skb == NULL) | |
2539 | return; | |
2540 | ||
2541 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2542 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2543 | memset(resp, 0, 24); | |
2544 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2545 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2546 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2547 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2548 | IEEE80211_STYPE_ACTION); | |
2549 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2550 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2551 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2552 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2553 | mgmt->u.action.u.sa_query.trans_id, | |
2554 | WLAN_SA_QUERY_TR_ID_LEN); | |
2555 | ||
62ae67be | 2556 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2557 | } |
2558 | ||
2e161f78 JB |
2559 | static ieee80211_rx_result debug_noinline |
2560 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2561 | { | |
2562 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2563 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2564 | |
2565 | /* | |
2566 | * From here on, look only at management frames. | |
2567 | * Data and control frames are already handled, | |
2568 | * and unknown (reserved) frames are useless. | |
2569 | */ | |
2570 | if (rx->skb->len < 24) | |
2571 | return RX_DROP_MONITOR; | |
2572 | ||
2573 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2574 | return RX_DROP_MONITOR; | |
2575 | ||
ee971924 JB |
2576 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2577 | ieee80211_is_beacon(mgmt->frame_control) && | |
2578 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2579 | int sig = 0; |
2580 | ||
30686bf7 | 2581 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
2582 | sig = status->signal; |
2583 | ||
ee971924 JB |
2584 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2585 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2586 | status->freq, sig); |
ee971924 JB |
2587 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2588 | } | |
2589 | ||
2e161f78 JB |
2590 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
2591 | return RX_DROP_UNUSABLE; | |
2592 | ||
2593 | return RX_CONTINUE; | |
2594 | } | |
2595 | ||
de1ede7a JB |
2596 | static ieee80211_rx_result debug_noinline |
2597 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2598 | { | |
2599 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2600 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2601 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2602 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2603 | int len = rx->skb->len; |
2604 | ||
2605 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2606 | return RX_CONTINUE; | |
2607 | ||
026331c4 JM |
2608 | /* drop too small frames */ |
2609 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2610 | return RX_DROP_UNUSABLE; |
de1ede7a | 2611 | |
815b8092 | 2612 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2613 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2614 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2615 | return RX_DROP_UNUSABLE; |
de1ede7a | 2616 | |
de1ede7a | 2617 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2618 | case WLAN_CATEGORY_HT: |
2619 | /* reject HT action frames from stations not supporting HT */ | |
2620 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2621 | goto invalid; | |
2622 | ||
2623 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2624 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2625 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2626 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2627 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2628 | break; | |
2629 | ||
ec61cd63 | 2630 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2631 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2632 | goto invalid; | |
2633 | ||
2634 | switch (mgmt->u.action.u.ht_smps.action) { | |
2635 | case WLAN_HT_ACTION_SMPS: { | |
2636 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2637 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2638 | |
2639 | /* convert to HT capability */ | |
2640 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2641 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2642 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2643 | break; |
2644 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2645 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2646 | break; |
2647 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2648 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2649 | break; |
2650 | default: | |
2651 | goto invalid; | |
2652 | } | |
1d8d3dec JB |
2653 | |
2654 | /* if no change do nothing */ | |
af0ed69b | 2655 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2656 | goto handled; |
af0ed69b | 2657 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2658 | |
2659 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2660 | ||
64f68e5d JB |
2661 | rate_control_rate_update(local, sband, rx->sta, |
2662 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2663 | goto handled; |
2664 | } | |
ec61cd63 JB |
2665 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2666 | struct ieee80211_supported_band *sband; | |
2667 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
1c45c5ce | 2668 | enum ieee80211_sta_rx_bandwidth max_bw, new_bw; |
ec61cd63 JB |
2669 | |
2670 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2671 | if (!(rx->sta->sta.ht_cap.cap & |
2672 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2673 | goto handled; |
2674 | ||
e1a0c6b3 | 2675 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
1c45c5ce | 2676 | max_bw = IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 2677 | else |
1c45c5ce EP |
2678 | max_bw = ieee80211_sta_cap_rx_bw(rx->sta); |
2679 | ||
2680 | /* set cur_max_bandwidth and recalc sta bw */ | |
2681 | rx->sta->cur_max_bandwidth = max_bw; | |
2682 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2683 | |
e1a0c6b3 | 2684 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2685 | goto handled; |
2686 | ||
1c45c5ce | 2687 | rx->sta->sta.bandwidth = new_bw; |
ec61cd63 JB |
2688 | sband = rx->local->hw.wiphy->bands[status->band]; |
2689 | ||
2690 | rate_control_rate_update(local, sband, rx->sta, | |
2691 | IEEE80211_RC_BW_CHANGED); | |
2692 | goto handled; | |
2693 | } | |
1d8d3dec JB |
2694 | default: |
2695 | goto invalid; | |
2696 | } | |
2697 | ||
0af83d3d | 2698 | break; |
1b3a2e49 JB |
2699 | case WLAN_CATEGORY_PUBLIC: |
2700 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2701 | goto invalid; | |
2702 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2703 | break; | |
2704 | if (!rx->sta) | |
2705 | break; | |
2706 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2707 | break; | |
2708 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2709 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2710 | break; | |
2711 | if (len < offsetof(struct ieee80211_mgmt, | |
2712 | u.action.u.ext_chan_switch.variable)) | |
2713 | goto invalid; | |
2714 | goto queue; | |
0af83d3d JB |
2715 | case WLAN_CATEGORY_VHT: |
2716 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2717 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2718 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2719 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2720 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2721 | break; | |
2722 | ||
2723 | /* verify action code is present */ | |
2724 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2725 | goto invalid; | |
2726 | ||
2727 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2728 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2729 | u8 opmode; | |
2730 | ||
2731 | /* verify opmode is present */ | |
2732 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2733 | goto invalid; | |
2734 | ||
2735 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2736 | ||
2737 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
cf1e05c6 | 2738 | opmode, status->band); |
0af83d3d JB |
2739 | goto handled; |
2740 | } | |
2741 | default: | |
2742 | break; | |
2743 | } | |
1d8d3dec | 2744 | break; |
de1ede7a | 2745 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2746 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2747 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2748 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2749 | sdata->vif.type != NL80211_IFTYPE_AP && |
2750 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2751 | break; |
8abd3f9b | 2752 | |
026331c4 JM |
2753 | /* verify action_code is present */ |
2754 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2755 | break; | |
2756 | ||
de1ede7a JB |
2757 | switch (mgmt->u.action.u.addba_req.action_code) { |
2758 | case WLAN_ACTION_ADDBA_REQ: | |
2759 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2760 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2761 | goto invalid; |
2762 | break; | |
de1ede7a JB |
2763 | case WLAN_ACTION_ADDBA_RESP: |
2764 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2765 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2766 | goto invalid; |
2767 | break; | |
de1ede7a JB |
2768 | case WLAN_ACTION_DELBA: |
2769 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2770 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2771 | goto invalid; |
2772 | break; | |
2773 | default: | |
2774 | goto invalid; | |
de1ede7a | 2775 | } |
bed7ee6e | 2776 | |
8b58ff83 | 2777 | goto queue; |
39192c0b | 2778 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2779 | /* verify action_code is present */ |
2780 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2781 | break; | |
2782 | ||
39192c0b JB |
2783 | switch (mgmt->u.action.u.measurement.action_code) { |
2784 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2785 | if (status->band != IEEE80211_BAND_5GHZ) |
2786 | break; | |
2787 | ||
39192c0b JB |
2788 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2789 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2790 | break; |
cd7760e6 SW |
2791 | |
2792 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2793 | break; | |
2794 | ||
39192c0b | 2795 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2796 | goto handled; |
cd7760e6 SW |
2797 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2798 | u8 *bssid; | |
2799 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2800 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2801 | break; |
cc32abd4 | 2802 | |
cd7760e6 | 2803 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2804 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2805 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2806 | break; |
2807 | ||
2808 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2809 | bssid = sdata->u.mgd.bssid; | |
2810 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2811 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2812 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2813 | bssid = mgmt->sa; | |
cd7760e6 SW |
2814 | else |
2815 | break; | |
2816 | ||
2817 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2818 | break; |
c481ec97 | 2819 | |
8b58ff83 | 2820 | goto queue; |
cd7760e6 | 2821 | } |
39192c0b JB |
2822 | } |
2823 | break; | |
fea14732 JM |
2824 | case WLAN_CATEGORY_SA_QUERY: |
2825 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2826 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2827 | break; |
2828 | ||
fea14732 JM |
2829 | switch (mgmt->u.action.u.sa_query.action) { |
2830 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2831 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2832 | break; |
fea14732 | 2833 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2834 | goto handled; |
fea14732 JM |
2835 | } |
2836 | break; | |
8db09850 | 2837 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2838 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2839 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2840 | break; | |
2841 | ||
8db09850 TP |
2842 | switch (mgmt->u.action.u.self_prot.action_code) { |
2843 | case WLAN_SP_MESH_PEERING_OPEN: | |
2844 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2845 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2846 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2847 | goto invalid; | |
a6dad6a2 | 2848 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2849 | /* userspace handles this frame */ |
2850 | break; | |
2851 | goto queue; | |
2852 | case WLAN_SP_MGK_INFORM: | |
2853 | case WLAN_SP_MGK_ACK: | |
2854 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2855 | goto invalid; | |
2856 | break; | |
2857 | } | |
2858 | break; | |
d3aaec8a | 2859 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2860 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2861 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2862 | break; | |
2863 | ||
77a121c3 JB |
2864 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2865 | break; | |
25d49e4d | 2866 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2867 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2868 | break; |
2869 | goto queue; | |
84040805 | 2870 | } |
026331c4 | 2871 | |
2e161f78 JB |
2872 | return RX_CONTINUE; |
2873 | ||
bed7ee6e | 2874 | invalid: |
554891e6 | 2875 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2876 | /* will return in the next handlers */ |
2877 | return RX_CONTINUE; | |
2878 | ||
2879 | handled: | |
2880 | if (rx->sta) | |
e5a9f8d0 | 2881 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
2882 | dev_kfree_skb(rx->skb); |
2883 | return RX_QUEUED; | |
2884 | ||
2885 | queue: | |
2886 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2887 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2888 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2889 | if (rx->sta) | |
e5a9f8d0 | 2890 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
2891 | return RX_QUEUED; |
2892 | } | |
2893 | ||
2894 | static ieee80211_rx_result debug_noinline | |
2895 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2896 | { | |
554891e6 | 2897 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2898 | int sig = 0; |
2e161f78 JB |
2899 | |
2900 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2901 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2902 | return RX_CONTINUE; |
d7907448 | 2903 | |
026331c4 JM |
2904 | /* |
2905 | * Getting here means the kernel doesn't know how to handle | |
2906 | * it, but maybe userspace does ... include returned frames | |
2907 | * so userspace can register for those to know whether ones | |
2908 | * it transmitted were processed or returned. | |
2909 | */ | |
026331c4 | 2910 | |
30686bf7 | 2911 | if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM)) |
804483e9 JB |
2912 | sig = status->signal; |
2913 | ||
71bbc994 | 2914 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2915 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 | 2916 | if (rx->sta) |
e5a9f8d0 | 2917 | rx->sta->rx_stats.packets++; |
2e161f78 JB |
2918 | dev_kfree_skb(rx->skb); |
2919 | return RX_QUEUED; | |
2920 | } | |
2921 | ||
2e161f78 JB |
2922 | return RX_CONTINUE; |
2923 | } | |
2924 | ||
2925 | static ieee80211_rx_result debug_noinline | |
2926 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2927 | { | |
2928 | struct ieee80211_local *local = rx->local; | |
2929 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2930 | struct sk_buff *nskb; | |
2931 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2932 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2933 | |
2934 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2935 | return RX_CONTINUE; | |
2936 | ||
2937 | /* | |
2938 | * For AP mode, hostapd is responsible for handling any action | |
2939 | * frames that we didn't handle, including returning unknown | |
2940 | * ones. For all other modes we will return them to the sender, | |
2941 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2942 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2943 | * Newer versions of hostapd shall also use the management frame |
2944 | * registration mechanisms, but older ones still use cooked | |
2945 | * monitor interfaces so push all frames there. | |
2946 | */ | |
554891e6 | 2947 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2948 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2949 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2950 | return RX_DROP_MONITOR; | |
026331c4 | 2951 | |
4b5ebccc JB |
2952 | if (is_multicast_ether_addr(mgmt->da)) |
2953 | return RX_DROP_MONITOR; | |
2954 | ||
84040805 JB |
2955 | /* do not return rejected action frames */ |
2956 | if (mgmt->u.action.category & 0x80) | |
2957 | return RX_DROP_UNUSABLE; | |
2958 | ||
2959 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2960 | GFP_ATOMIC); | |
2961 | if (nskb) { | |
292b4df6 | 2962 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2963 | |
292b4df6 JL |
2964 | nmgmt->u.action.category |= 0x80; |
2965 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2966 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2967 | |
2968 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2969 | ||
07e5a5f5 JB |
2970 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2971 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2972 | ||
2973 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2974 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2975 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
30686bf7 | 2976 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
07e5a5f5 JB |
2977 | info->hw_queue = |
2978 | local->hw.offchannel_tx_hw_queue; | |
2979 | } | |
2980 | ||
2981 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2982 | status->band); | |
de1ede7a | 2983 | } |
39192c0b JB |
2984 | dev_kfree_skb(rx->skb); |
2985 | return RX_QUEUED; | |
de1ede7a JB |
2986 | } |
2987 | ||
49461622 | 2988 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2989 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2990 | { |
eb9fb5b8 | 2991 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2992 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2993 | __le16 stype; | |
571ecf67 | 2994 | |
77a121c3 | 2995 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2996 | |
77a121c3 JB |
2997 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2998 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 2999 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
3000 | sdata->vif.type != NL80211_IFTYPE_STATION) |
3001 | return RX_DROP_MONITOR; | |
472dbc45 | 3002 | |
77a121c3 | 3003 | switch (stype) { |
66e67e41 | 3004 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
3005 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
3006 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
3007 | /* process for all: mesh, mlme, ibss */ | |
3008 | break; | |
66e67e41 JB |
3009 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
3010 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
3011 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
3012 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
3013 | if (is_multicast_ether_addr(mgmt->da) && |
3014 | !is_broadcast_ether_addr(mgmt->da)) | |
3015 | return RX_DROP_MONITOR; | |
3016 | ||
77a121c3 JB |
3017 | /* process only for station */ |
3018 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
3019 | return RX_DROP_MONITOR; | |
3020 | break; | |
3021 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
3022 | /* process only for ibss and mesh */ |
3023 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
3024 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
3025 | return RX_DROP_MONITOR; |
3026 | break; | |
3027 | default: | |
3028 | return RX_DROP_MONITOR; | |
3029 | } | |
f9d540ee | 3030 | |
77a121c3 | 3031 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 3032 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
3033 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
3034 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 | 3035 | if (rx->sta) |
e5a9f8d0 | 3036 | rx->sta->rx_stats.packets++; |
46900298 | 3037 | |
77a121c3 | 3038 | return RX_QUEUED; |
571ecf67 JB |
3039 | } |
3040 | ||
5f0b7de5 JB |
3041 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
3042 | struct ieee80211_rate *rate) | |
3d30d949 MW |
3043 | { |
3044 | struct ieee80211_sub_if_data *sdata; | |
3045 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
3046 | struct sk_buff *skb = rx->skb, *skb2; |
3047 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 3048 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 3049 | int needed_headroom; |
3d30d949 | 3050 | |
554891e6 JB |
3051 | /* |
3052 | * If cooked monitor has been processed already, then | |
3053 | * don't do it again. If not, set the flag. | |
3054 | */ | |
3055 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 3056 | goto out_free_skb; |
554891e6 | 3057 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 3058 | |
152c477a JB |
3059 | /* If there are no cooked monitor interfaces, just free the SKB */ |
3060 | if (!local->cooked_mntrs) | |
3061 | goto out_free_skb; | |
3062 | ||
1f7bba79 JB |
3063 | /* vendor data is long removed here */ |
3064 | status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA; | |
293702a3 | 3065 | /* room for the radiotap header based on driver features */ |
1f7bba79 | 3066 | needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb); |
3d30d949 | 3067 | |
293702a3 JB |
3068 | if (skb_headroom(skb) < needed_headroom && |
3069 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
3070 | goto out_free_skb; | |
3d30d949 | 3071 | |
293702a3 | 3072 | /* prepend radiotap information */ |
973ef21a FF |
3073 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
3074 | false); | |
3d30d949 MW |
3075 | |
3076 | skb_set_mac_header(skb, 0); | |
3077 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3078 | skb->pkt_type = PACKET_OTHERHOST; | |
3079 | skb->protocol = htons(ETH_P_802_2); | |
3080 | ||
3081 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 3082 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
3083 | continue; |
3084 | ||
05c914fe | 3085 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
3086 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
3087 | continue; | |
3088 | ||
3089 | if (prev_dev) { | |
3090 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3091 | if (skb2) { | |
3092 | skb2->dev = prev_dev; | |
5548a8a1 | 3093 | netif_receive_skb(skb2); |
3d30d949 MW |
3094 | } |
3095 | } | |
3096 | ||
3097 | prev_dev = sdata->dev; | |
5a490510 | 3098 | ieee80211_rx_stats(sdata->dev, skb->len); |
3d30d949 MW |
3099 | } |
3100 | ||
3101 | if (prev_dev) { | |
3102 | skb->dev = prev_dev; | |
5548a8a1 | 3103 | netif_receive_skb(skb); |
554891e6 JB |
3104 | return; |
3105 | } | |
3d30d949 MW |
3106 | |
3107 | out_free_skb: | |
3108 | dev_kfree_skb(skb); | |
3109 | } | |
3110 | ||
aa0c8636 CL |
3111 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
3112 | ieee80211_rx_result res) | |
3113 | { | |
3114 | switch (res) { | |
3115 | case RX_DROP_MONITOR: | |
3116 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3117 | if (rx->sta) | |
e5a9f8d0 | 3118 | rx->sta->rx_stats.dropped++; |
aa0c8636 CL |
3119 | /* fall through */ |
3120 | case RX_CONTINUE: { | |
3121 | struct ieee80211_rate *rate = NULL; | |
3122 | struct ieee80211_supported_band *sband; | |
3123 | struct ieee80211_rx_status *status; | |
3124 | ||
3125 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
3126 | ||
3127 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
3128 | if (!(status->flag & RX_FLAG_HT) && |
3129 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
3130 | rate = &sband->bitrates[status->rate_idx]; |
3131 | ||
3132 | ieee80211_rx_cooked_monitor(rx, rate); | |
3133 | break; | |
3134 | } | |
3135 | case RX_DROP_UNUSABLE: | |
3136 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
3137 | if (rx->sta) | |
e5a9f8d0 | 3138 | rx->sta->rx_stats.dropped++; |
aa0c8636 CL |
3139 | dev_kfree_skb(rx->skb); |
3140 | break; | |
3141 | case RX_QUEUED: | |
3142 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
3143 | break; | |
3144 | } | |
3145 | } | |
571ecf67 | 3146 | |
f9e124fb CL |
3147 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
3148 | struct sk_buff_head *frames) | |
58905290 | 3149 | { |
58905290 | 3150 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 3151 | struct sk_buff *skb; |
8944b79f | 3152 | |
e32f85f7 LCC |
3153 | #define CALL_RXH(rxh) \ |
3154 | do { \ | |
3155 | res = rxh(rx); \ | |
3156 | if (res != RX_CONTINUE) \ | |
2569a826 | 3157 | goto rxh_next; \ |
e32f85f7 | 3158 | } while (0); |
49461622 | 3159 | |
45ceeee8 JB |
3160 | /* Lock here to avoid hitting all of the data used in the RX |
3161 | * path (e.g. key data, station data, ...) concurrently when | |
3162 | * a frame is released from the reorder buffer due to timeout | |
3163 | * from the timer, potentially concurrently with RX from the | |
3164 | * driver. | |
3165 | */ | |
f9e124fb | 3166 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 3167 | |
f9e124fb | 3168 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
3169 | /* |
3170 | * all the other fields are valid across frames | |
3171 | * that belong to an aMPDU since they are on the | |
3172 | * same TID from the same station | |
3173 | */ | |
3174 | rx->skb = skb; | |
3175 | ||
2569a826 | 3176 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3177 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3178 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3179 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3180 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3181 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3182 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3183 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3184 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3185 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3186 | #endif |
2154c81c | 3187 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3188 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3189 | |
3190 | /* special treatment -- needs the queue */ | |
3191 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3192 | if (res != RX_CONTINUE) | |
3193 | goto rxh_next; | |
3194 | ||
2e161f78 | 3195 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3196 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3197 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3198 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3199 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3200 | |
aa0c8636 CL |
3201 | rxh_next: |
3202 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3203 | |
49461622 | 3204 | #undef CALL_RXH |
aa0c8636 | 3205 | } |
24a8fdad | 3206 | |
f9e124fb | 3207 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3208 | } |
3209 | ||
4406c376 | 3210 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3211 | { |
f9e124fb | 3212 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3213 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3214 | ||
f9e124fb CL |
3215 | __skb_queue_head_init(&reorder_release); |
3216 | ||
aa0c8636 CL |
3217 | #define CALL_RXH(rxh) \ |
3218 | do { \ | |
3219 | res = rxh(rx); \ | |
3220 | if (res != RX_CONTINUE) \ | |
3221 | goto rxh_next; \ | |
3222 | } while (0); | |
3223 | ||
0395442a | 3224 | CALL_RXH(ieee80211_rx_h_check_dup) |
aa0c8636 CL |
3225 | CALL_RXH(ieee80211_rx_h_check) |
3226 | ||
f9e124fb | 3227 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3228 | |
f9e124fb | 3229 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3230 | return; |
49461622 | 3231 | |
2569a826 | 3232 | rxh_next: |
aa0c8636 CL |
3233 | ieee80211_rx_handlers_result(rx, res); |
3234 | ||
3235 | #undef CALL_RXH | |
58905290 JB |
3236 | } |
3237 | ||
2bff8ebf | 3238 | /* |
dd318575 JB |
3239 | * This function makes calls into the RX path, therefore |
3240 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3241 | */ |
3242 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3243 | { | |
f9e124fb | 3244 | struct sk_buff_head frames; |
554891e6 JB |
3245 | struct ieee80211_rx_data rx = { |
3246 | .sta = sta, | |
3247 | .sdata = sta->sdata, | |
3248 | .local = sta->local, | |
9e26297a JB |
3249 | /* This is OK -- must be QoS data frame */ |
3250 | .security_idx = tid, | |
3251 | .seqno_idx = tid, | |
af9f9b22 | 3252 | .napi = NULL, /* must be NULL to not have races */ |
554891e6 | 3253 | }; |
2c15a0cf CL |
3254 | struct tid_ampdu_rx *tid_agg_rx; |
3255 | ||
3256 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3257 | if (!tid_agg_rx) | |
3258 | return; | |
2bff8ebf | 3259 | |
f9e124fb CL |
3260 | __skb_queue_head_init(&frames); |
3261 | ||
2c15a0cf | 3262 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3263 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3264 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3265 | |
b497de63 EG |
3266 | if (!skb_queue_empty(&frames)) { |
3267 | struct ieee80211_event event = { | |
3268 | .type = BA_FRAME_TIMEOUT, | |
3269 | .u.ba.tid = tid, | |
3270 | .u.ba.sta = &sta->sta, | |
3271 | }; | |
3272 | drv_event_callback(rx.local, rx.sdata, &event); | |
3273 | } | |
3274 | ||
f9e124fb | 3275 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3276 | } |
3277 | ||
571ecf67 JB |
3278 | /* main receive path */ |
3279 | ||
a58fbe1a | 3280 | static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) |
23a24def | 3281 | { |
20b01f80 | 3282 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 | 3283 | struct sk_buff *skb = rx->skb; |
a58fbe1a | 3284 | struct ieee80211_hdr *hdr = (void *)skb->data; |
eb9fb5b8 JB |
3285 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
3286 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3287 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3288 | ||
51fb61e7 | 3289 | switch (sdata->vif.type) { |
05c914fe | 3290 | case NL80211_IFTYPE_STATION: |
9bc383de | 3291 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3292 | return false; |
a58fbe1a JB |
3293 | if (multicast) |
3294 | return true; | |
3295 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe | 3296 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3297 | if (!bssid) |
3c2723f5 | 3298 | return false; |
6329b8d9 FF |
3299 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3300 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3301 | return false; |
a58fbe1a | 3302 | if (ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3303 | return true; |
a58fbe1a | 3304 | if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) |
3c2723f5 | 3305 | return false; |
a58fbe1a JB |
3306 | if (!multicast && |
3307 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
df140465 | 3308 | return false; |
a58fbe1a | 3309 | if (!rx->sta) { |
0fb8ca45 | 3310 | int rate_idx; |
5614618e JB |
3311 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3312 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3313 | else |
eb9fb5b8 | 3314 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3315 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3316 | BIT(rate_idx)); | |
0fb8ca45 | 3317 | } |
a58fbe1a | 3318 | return true; |
239281f8 RL |
3319 | case NL80211_IFTYPE_OCB: |
3320 | if (!bssid) | |
3321 | return false; | |
cc117298 | 3322 | if (!ieee80211_is_data_present(hdr->frame_control)) |
239281f8 | 3323 | return false; |
a58fbe1a | 3324 | if (!is_broadcast_ether_addr(bssid)) |
239281f8 | 3325 | return false; |
a58fbe1a JB |
3326 | if (!multicast && |
3327 | !ether_addr_equal(sdata->dev->dev_addr, hdr->addr1)) | |
df140465 | 3328 | return false; |
a58fbe1a | 3329 | if (!rx->sta) { |
239281f8 RL |
3330 | int rate_idx; |
3331 | if (status->flag & RX_FLAG_HT) | |
3332 | rate_idx = 0; /* TODO: HT rates */ | |
3333 | else | |
3334 | rate_idx = status->rate_idx; | |
3335 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3336 | BIT(rate_idx)); | |
3337 | } | |
a58fbe1a | 3338 | return true; |
05c914fe | 3339 | case NL80211_IFTYPE_MESH_POINT: |
a58fbe1a JB |
3340 | if (multicast) |
3341 | return true; | |
3342 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
05c914fe JB |
3343 | case NL80211_IFTYPE_AP_VLAN: |
3344 | case NL80211_IFTYPE_AP: | |
a58fbe1a JB |
3345 | if (!bssid) |
3346 | return ether_addr_equal(sdata->vif.addr, hdr->addr1); | |
3347 | ||
3348 | if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { | |
3df6eaea JB |
3349 | /* |
3350 | * Accept public action frames even when the | |
3351 | * BSSID doesn't match, this is used for P2P | |
3352 | * and location updates. Note that mac80211 | |
3353 | * itself never looks at these frames. | |
3354 | */ | |
2b9ccd4e JB |
3355 | if (!multicast && |
3356 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3357 | return false; |
d48b2968 | 3358 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3359 | return true; |
5c90067c | 3360 | return ieee80211_is_beacon(hdr->frame_control); |
a58fbe1a JB |
3361 | } |
3362 | ||
3363 | if (!ieee80211_has_tods(hdr->frame_control)) { | |
db8e1732 AN |
3364 | /* ignore data frames to TDLS-peers */ |
3365 | if (ieee80211_is_data(hdr->frame_control)) | |
3366 | return false; | |
3367 | /* ignore action frames to TDLS-peers */ | |
3368 | if (ieee80211_is_action(hdr->frame_control) && | |
3369 | !ether_addr_equal(bssid, hdr->addr1)) | |
3370 | return false; | |
23a24def | 3371 | } |
a58fbe1a | 3372 | return true; |
05c914fe | 3373 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3374 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3375 | return false; |
a58fbe1a | 3376 | return ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2); |
f142c6b9 | 3377 | case NL80211_IFTYPE_P2P_DEVICE: |
a58fbe1a JB |
3378 | return ieee80211_is_public_action(hdr, skb->len) || |
3379 | ieee80211_is_probe_req(hdr->frame_control) || | |
3380 | ieee80211_is_probe_resp(hdr->frame_control) || | |
3381 | ieee80211_is_beacon(hdr->frame_control); | |
2ca27bcf | 3382 | default: |
fb1c1cd6 | 3383 | break; |
23a24def JB |
3384 | } |
3385 | ||
a58fbe1a JB |
3386 | WARN_ON_ONCE(1); |
3387 | return false; | |
23a24def JB |
3388 | } |
3389 | ||
4406c376 JB |
3390 | /* |
3391 | * This function returns whether or not the SKB | |
3392 | * was destined for RX processing or not, which, | |
3393 | * if consume is true, is equivalent to whether | |
3394 | * or not the skb was consumed. | |
3395 | */ | |
3396 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3397 | struct sk_buff *skb, bool consume) | |
3398 | { | |
3399 | struct ieee80211_local *local = rx->local; | |
3400 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
4406c376 JB |
3401 | |
3402 | rx->skb = skb; | |
4406c376 | 3403 | |
a58fbe1a | 3404 | if (!ieee80211_accept_frame(rx)) |
4406c376 JB |
3405 | return false; |
3406 | ||
4406c376 JB |
3407 | if (!consume) { |
3408 | skb = skb_copy(skb, GFP_ATOMIC); | |
3409 | if (!skb) { | |
3410 | if (net_ratelimit()) | |
3411 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3412 | "failed to copy skb for %s\n", |
4406c376 JB |
3413 | sdata->name); |
3414 | return true; | |
3415 | } | |
3416 | ||
3417 | rx->skb = skb; | |
3418 | } | |
3419 | ||
3420 | ieee80211_invoke_rx_handlers(rx); | |
3421 | return true; | |
3422 | } | |
3423 | ||
571ecf67 | 3424 | /* |
6b59db7d | 3425 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3426 | * be called with rcu_read_lock protection. |
571ecf67 | 3427 | */ |
71ebb4aa | 3428 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
af9f9b22 JB |
3429 | struct sk_buff *skb, |
3430 | struct napi_struct *napi) | |
571ecf67 JB |
3431 | { |
3432 | struct ieee80211_local *local = hw_to_local(hw); | |
3433 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3434 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3435 | __le16 fc; |
5cf121c3 | 3436 | struct ieee80211_rx_data rx; |
4406c376 | 3437 | struct ieee80211_sub_if_data *prev; |
7bedd0cf JB |
3438 | struct sta_info *sta, *prev_sta; |
3439 | struct rhash_head *tmp; | |
e3cf8b3f | 3440 | int err = 0; |
571ecf67 | 3441 | |
e3cf8b3f | 3442 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3443 | memset(&rx, 0, sizeof(rx)); |
3444 | rx.skb = skb; | |
3445 | rx.local = local; | |
af9f9b22 | 3446 | rx.napi = napi; |
72abd81b | 3447 | |
e3cf8b3f | 3448 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
c206ca67 | 3449 | I802_DEBUG_INC(local->dot11ReceivedFragmentCount); |
571ecf67 | 3450 | |
4a4f1a58 JB |
3451 | if (ieee80211_is_mgmt(fc)) { |
3452 | /* drop frame if too short for header */ | |
3453 | if (skb->len < ieee80211_hdrlen(fc)) | |
3454 | err = -ENOBUFS; | |
3455 | else | |
3456 | err = skb_linearize(skb); | |
3457 | } else { | |
e3cf8b3f | 3458 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3459 | } |
e3cf8b3f ZY |
3460 | |
3461 | if (err) { | |
3462 | dev_kfree_skb(skb); | |
3463 | return; | |
3464 | } | |
3465 | ||
3466 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3467 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3468 | ieee80211_verify_alignment(&rx); |
38f3714d | 3469 | |
d48b2968 JB |
3470 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3471 | ieee80211_is_beacon(hdr->frame_control))) | |
3472 | ieee80211_scan_rx(local, skb); | |
3473 | ||
e3cf8b3f | 3474 | if (ieee80211_is_data(fc)) { |
7bedd0cf JB |
3475 | const struct bucket_table *tbl; |
3476 | ||
56af3268 | 3477 | prev_sta = NULL; |
4406c376 | 3478 | |
7bedd0cf JB |
3479 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); |
3480 | ||
3481 | for_each_sta_info(local, tbl, hdr->addr2, sta, tmp) { | |
56af3268 BG |
3482 | if (!prev_sta) { |
3483 | prev_sta = sta; | |
3484 | continue; | |
3485 | } | |
3486 | ||
3487 | rx.sta = prev_sta; | |
3488 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3489 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3490 | |
56af3268 | 3491 | prev_sta = sta; |
4406c376 | 3492 | } |
56af3268 BG |
3493 | |
3494 | if (prev_sta) { | |
3495 | rx.sta = prev_sta; | |
3496 | rx.sdata = prev_sta->sdata; | |
3497 | ||
4406c376 | 3498 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3499 | return; |
8e26d5ad | 3500 | goto out; |
56af3268 | 3501 | } |
4406c376 JB |
3502 | } |
3503 | ||
4b0dd98e | 3504 | prev = NULL; |
b2e7771e | 3505 | |
4b0dd98e JB |
3506 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3507 | if (!ieee80211_sdata_running(sdata)) | |
3508 | continue; | |
340e11f3 | 3509 | |
4b0dd98e JB |
3510 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3511 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3512 | continue; | |
340e11f3 | 3513 | |
4b0dd98e JB |
3514 | /* |
3515 | * frame is destined for this interface, but if it's | |
3516 | * not also for the previous one we handle that after | |
3517 | * the loop to avoid copying the SKB once too much | |
3518 | */ | |
4bb29f8c | 3519 | |
4b0dd98e | 3520 | if (!prev) { |
abe60632 | 3521 | prev = sdata; |
4b0dd98e | 3522 | continue; |
340e11f3 | 3523 | } |
4bb29f8c | 3524 | |
7852e361 | 3525 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3526 | rx.sdata = prev; |
3527 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3528 | |
4b0dd98e JB |
3529 | prev = sdata; |
3530 | } | |
3531 | ||
3532 | if (prev) { | |
7852e361 | 3533 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3534 | rx.sdata = prev; |
4406c376 | 3535 | |
4b0dd98e JB |
3536 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3537 | return; | |
571ecf67 | 3538 | } |
4406c376 | 3539 | |
8e26d5ad | 3540 | out: |
4406c376 | 3541 | dev_kfree_skb(skb); |
571ecf67 | 3542 | } |
6368e4b1 RR |
3543 | |
3544 | /* | |
3545 | * This is the receive path handler. It is called by a low level driver when an | |
3546 | * 802.11 MPDU is received from the hardware. | |
3547 | */ | |
af9f9b22 JB |
3548 | void ieee80211_rx_napi(struct ieee80211_hw *hw, struct sk_buff *skb, |
3549 | struct napi_struct *napi) | |
6368e4b1 RR |
3550 | { |
3551 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3552 | struct ieee80211_rate *rate = NULL; |
3553 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3554 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3555 | |
d20ef63d JB |
3556 | WARN_ON_ONCE(softirq_count() == 0); |
3557 | ||
444e3803 | 3558 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3559 | goto drop; |
8318d78a JB |
3560 | |
3561 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3562 | if (WARN_ON(!sband)) |
3563 | goto drop; | |
8318d78a | 3564 | |
89c3a8ac JB |
3565 | /* |
3566 | * If we're suspending, it is possible although not too likely | |
3567 | * that we'd be receiving frames after having already partially | |
3568 | * quiesced the stack. We can't process such frames then since | |
3569 | * that might, for example, cause stations to be added or other | |
3570 | * driver callbacks be invoked. | |
3571 | */ | |
77a980dc JB |
3572 | if (unlikely(local->quiescing || local->suspended)) |
3573 | goto drop; | |
89c3a8ac | 3574 | |
04800ada AN |
3575 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3576 | if (unlikely(local->in_reconfig)) | |
3577 | goto drop; | |
3578 | ||
ea77f12f JB |
3579 | /* |
3580 | * The same happens when we're not even started, | |
3581 | * but that's worth a warning. | |
3582 | */ | |
77a980dc JB |
3583 | if (WARN_ON(!local->started)) |
3584 | goto drop; | |
ea77f12f | 3585 | |
fc885189 | 3586 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3587 | /* |
fc885189 JB |
3588 | * Validate the rate, unless a PLCP error means that |
3589 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3590 | */ |
fc885189 JB |
3591 | |
3592 | if (status->flag & RX_FLAG_HT) { | |
3593 | /* | |
3594 | * rate_idx is MCS index, which can be [0-76] | |
3595 | * as documented on: | |
3596 | * | |
3597 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3598 | * | |
3599 | * Anything else would be some sort of driver or | |
3600 | * hardware error. The driver should catch hardware | |
3601 | * errors. | |
3602 | */ | |
444e3803 | 3603 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3604 | "Rate marked as an HT rate but passed " |
3605 | "status->rate_idx is not " | |
3606 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3607 | status->rate_idx, | |
3608 | status->rate_idx)) | |
3609 | goto drop; | |
5614618e JB |
3610 | } else if (status->flag & RX_FLAG_VHT) { |
3611 | if (WARN_ONCE(status->rate_idx > 9 || | |
3612 | !status->vht_nss || | |
3613 | status->vht_nss > 8, | |
3614 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3615 | status->rate_idx, status->vht_nss)) | |
3616 | goto drop; | |
fc885189 | 3617 | } else { |
444e3803 | 3618 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3619 | goto drop; |
3620 | rate = &sband->bitrates[status->rate_idx]; | |
3621 | } | |
0fb8ca45 | 3622 | } |
6368e4b1 | 3623 | |
554891e6 JB |
3624 | status->rx_flags = 0; |
3625 | ||
6368e4b1 RR |
3626 | /* |
3627 | * key references and virtual interfaces are protected using RCU | |
3628 | * and this requires that we are in a read-side RCU section during | |
3629 | * receive processing | |
3630 | */ | |
3631 | rcu_read_lock(); | |
3632 | ||
3633 | /* | |
3634 | * Frames with failed FCS/PLCP checksum are not returned, | |
3635 | * all other frames are returned without radiotap header | |
3636 | * if it was previously present. | |
3637 | * Also, frames with less than 16 bytes are dropped. | |
3638 | */ | |
f1d58c25 | 3639 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3640 | if (!skb) { |
3641 | rcu_read_unlock(); | |
3642 | return; | |
3643 | } | |
3644 | ||
e1e54068 JB |
3645 | ieee80211_tpt_led_trig_rx(local, |
3646 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3647 | skb->len); | |
af9f9b22 | 3648 | __ieee80211_rx_handle_packet(hw, skb, napi); |
6368e4b1 RR |
3649 | |
3650 | rcu_read_unlock(); | |
77a980dc JB |
3651 | |
3652 | return; | |
3653 | drop: | |
3654 | kfree_skb(skb); | |
6368e4b1 | 3655 | } |
af9f9b22 | 3656 | EXPORT_SYMBOL(ieee80211_rx_napi); |
571ecf67 JB |
3657 | |
3658 | /* This is a version of the rx handler that can be called from hard irq | |
3659 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3660 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3661 | { |
3662 | struct ieee80211_local *local = hw_to_local(hw); | |
3663 | ||
3664 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3665 | ||
571ecf67 JB |
3666 | skb->pkt_type = IEEE80211_RX_MSG; |
3667 | skb_queue_tail(&local->skb_queue, skb); | |
3668 | tasklet_schedule(&local->tasklet); | |
3669 | } | |
3670 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |