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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
ab46623e | 12 | #include <linux/jiffies.h> |
571ecf67 JB |
13 | #include <linux/kernel.h> |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
d4e46a3d | 17 | #include <linux/rcupdate.h> |
571ecf67 JB |
18 | #include <net/mac80211.h> |
19 | #include <net/ieee80211_radiotap.h> | |
20 | ||
21 | #include "ieee80211_i.h" | |
2c8dccc7 | 22 | #include "led.h" |
33b64eb2 | 23 | #include "mesh.h" |
571ecf67 JB |
24 | #include "wep.h" |
25 | #include "wpa.h" | |
26 | #include "tkip.h" | |
27 | #include "wme.h" | |
28 | ||
71364716 RR |
29 | u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, |
30 | struct tid_ampdu_rx *tid_agg_rx, | |
31 | struct sk_buff *skb, u16 mpdu_seq_num, | |
32 | int bar_req); | |
b2e7771e JB |
33 | /* |
34 | * monitor mode reception | |
35 | * | |
36 | * This function cleans up the SKB, i.e. it removes all the stuff | |
37 | * only useful for monitoring. | |
38 | */ | |
39 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
40 | struct sk_buff *skb, | |
41 | int rtap_len) | |
42 | { | |
43 | skb_pull(skb, rtap_len); | |
44 | ||
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { | |
46 | if (likely(skb->len > FCS_LEN)) | |
47 | skb_trim(skb, skb->len - FCS_LEN); | |
48 | else { | |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
52 | skb = NULL; | |
53 | } | |
54 | } | |
55 | ||
56 | return skb; | |
57 | } | |
58 | ||
59 | static inline int should_drop_frame(struct ieee80211_rx_status *status, | |
60 | struct sk_buff *skb, | |
61 | int present_fcs_len, | |
62 | int radiotap_len) | |
63 | { | |
182503ab | 64 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
b2e7771e JB |
65 | |
66 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) | |
67 | return 1; | |
68 | if (unlikely(skb->len < 16 + present_fcs_len + radiotap_len)) | |
69 | return 1; | |
87228f57 HH |
70 | if (ieee80211_is_ctl(hdr->frame_control) && |
71 | !ieee80211_is_pspoll(hdr->frame_control) && | |
72 | !ieee80211_is_back_req(hdr->frame_control)) | |
b2e7771e JB |
73 | return 1; |
74 | return 0; | |
75 | } | |
76 | ||
601ae7f2 BR |
77 | static int |
78 | ieee80211_rx_radiotap_len(struct ieee80211_local *local, | |
79 | struct ieee80211_rx_status *status) | |
80 | { | |
81 | int len; | |
82 | ||
83 | /* always present fields */ | |
84 | len = sizeof(struct ieee80211_radiotap_header) + 9; | |
85 | ||
86 | if (status->flag & RX_FLAG_TSFT) | |
87 | len += 8; | |
88 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DB || | |
89 | local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
90 | len += 1; | |
91 | if (local->hw.flags & IEEE80211_HW_NOISE_DBM) | |
92 | len += 1; | |
93 | ||
94 | if (len & 1) /* padding for RX_FLAGS if necessary */ | |
95 | len++; | |
96 | ||
97 | /* make sure radiotap starts at a naturally aligned address */ | |
98 | if (len % 8) | |
99 | len = roundup(len, 8); | |
100 | ||
101 | return len; | |
102 | } | |
103 | ||
104 | /** | |
105 | * ieee80211_add_rx_radiotap_header - add radiotap header | |
106 | * | |
107 | * add a radiotap header containing all the fields which the hardware provided. | |
108 | */ | |
109 | static void | |
110 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
111 | struct sk_buff *skb, | |
112 | struct ieee80211_rx_status *status, | |
113 | struct ieee80211_rate *rate, | |
114 | int rtap_len) | |
115 | { | |
116 | struct ieee80211_radiotap_header *rthdr; | |
117 | unsigned char *pos; | |
118 | ||
119 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
120 | memset(rthdr, 0, rtap_len); | |
121 | ||
122 | /* radiotap header, set always present flags */ | |
123 | rthdr->it_present = | |
124 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
125 | (1 << IEEE80211_RADIOTAP_RATE) | | |
126 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
127 | (1 << IEEE80211_RADIOTAP_ANTENNA) | | |
128 | (1 << IEEE80211_RADIOTAP_RX_FLAGS)); | |
129 | rthdr->it_len = cpu_to_le16(rtap_len); | |
130 | ||
131 | pos = (unsigned char *)(rthdr+1); | |
132 | ||
133 | /* the order of the following fields is important */ | |
134 | ||
135 | /* IEEE80211_RADIOTAP_TSFT */ | |
136 | if (status->flag & RX_FLAG_TSFT) { | |
137 | *(__le64 *)pos = cpu_to_le64(status->mactime); | |
138 | rthdr->it_present |= | |
139 | cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); | |
140 | pos += 8; | |
141 | } | |
142 | ||
143 | /* IEEE80211_RADIOTAP_FLAGS */ | |
144 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
145 | *pos |= IEEE80211_RADIOTAP_F_FCS; | |
b4f28bbb BR |
146 | if (status->flag & RX_FLAG_SHORTPRE) |
147 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
148 | pos++; |
149 | ||
150 | /* IEEE80211_RADIOTAP_RATE */ | |
151 | *pos = rate->bitrate / 5; | |
152 | pos++; | |
153 | ||
154 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
155 | *(__le16 *)pos = cpu_to_le16(status->freq); | |
156 | pos += 2; | |
157 | if (status->band == IEEE80211_BAND_5GHZ) | |
158 | *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
159 | IEEE80211_CHAN_5GHZ); | |
9deb1ae5 BR |
160 | else if (rate->flags & IEEE80211_RATE_ERP_G) |
161 | *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
162 | IEEE80211_CHAN_2GHZ); | |
601ae7f2 | 163 | else |
9deb1ae5 | 164 | *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_CCK | |
601ae7f2 BR |
165 | IEEE80211_CHAN_2GHZ); |
166 | pos += 2; | |
167 | ||
168 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
169 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { | |
170 | *pos = status->signal; | |
171 | rthdr->it_present |= | |
172 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
173 | pos++; | |
174 | } | |
175 | ||
176 | /* IEEE80211_RADIOTAP_DBM_ANTNOISE */ | |
177 | if (local->hw.flags & IEEE80211_HW_NOISE_DBM) { | |
178 | *pos = status->noise; | |
179 | rthdr->it_present |= | |
180 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE); | |
181 | pos++; | |
182 | } | |
183 | ||
184 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ | |
185 | ||
186 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
187 | *pos = status->antenna; | |
188 | pos++; | |
189 | ||
190 | /* IEEE80211_RADIOTAP_DB_ANTSIGNAL */ | |
191 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DB) { | |
192 | *pos = status->signal; | |
193 | rthdr->it_present |= | |
194 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL); | |
195 | pos++; | |
196 | } | |
197 | ||
198 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ | |
199 | ||
200 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
201 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
202 | if ((pos - (unsigned char *)rthdr) & 1) | |
203 | pos++; | |
204 | /* FIXME: when radiotap gets a 'bad PLCP' flag use it here */ | |
205 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) | |
206 | *(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS); | |
207 | pos += 2; | |
208 | } | |
209 | ||
b2e7771e JB |
210 | /* |
211 | * This function copies a received frame to all monitor interfaces and | |
212 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
213 | * radiotap header the driver might have added. | |
214 | */ | |
215 | static struct sk_buff * | |
216 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a JB |
217 | struct ieee80211_rx_status *status, |
218 | struct ieee80211_rate *rate) | |
b2e7771e JB |
219 | { |
220 | struct ieee80211_sub_if_data *sdata; | |
b2e7771e | 221 | int needed_headroom = 0; |
b2e7771e JB |
222 | struct sk_buff *skb, *skb2; |
223 | struct net_device *prev_dev = NULL; | |
224 | int present_fcs_len = 0; | |
225 | int rtap_len = 0; | |
226 | ||
227 | /* | |
228 | * First, we may need to make a copy of the skb because | |
229 | * (1) we need to modify it for radiotap (if not present), and | |
230 | * (2) the other RX handlers will modify the skb we got. | |
231 | * | |
232 | * We don't need to, of course, if we aren't going to return | |
233 | * the SKB because it has a bad FCS/PLCP checksum. | |
234 | */ | |
235 | if (status->flag & RX_FLAG_RADIOTAP) | |
236 | rtap_len = ieee80211_get_radiotap_len(origskb->data); | |
237 | else | |
601ae7f2 BR |
238 | /* room for the radiotap header based on driver features */ |
239 | needed_headroom = ieee80211_rx_radiotap_len(local, status); | |
b2e7771e JB |
240 | |
241 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
242 | present_fcs_len = FCS_LEN; | |
243 | ||
244 | if (!local->monitors) { | |
245 | if (should_drop_frame(status, origskb, present_fcs_len, | |
246 | rtap_len)) { | |
247 | dev_kfree_skb(origskb); | |
248 | return NULL; | |
249 | } | |
250 | ||
251 | return remove_monitor_info(local, origskb, rtap_len); | |
252 | } | |
253 | ||
254 | if (should_drop_frame(status, origskb, present_fcs_len, rtap_len)) { | |
255 | /* only need to expand headroom if necessary */ | |
256 | skb = origskb; | |
257 | origskb = NULL; | |
258 | ||
259 | /* | |
260 | * This shouldn't trigger often because most devices have an | |
261 | * RX header they pull before we get here, and that should | |
262 | * be big enough for our radiotap information. We should | |
263 | * probably export the length to drivers so that we can have | |
264 | * them allocate enough headroom to start with. | |
265 | */ | |
266 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 267 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
268 | dev_kfree_skb(skb); |
269 | return NULL; | |
270 | } | |
271 | } else { | |
272 | /* | |
273 | * Need to make a copy and possibly remove radiotap header | |
274 | * and FCS from the original. | |
275 | */ | |
276 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
277 | ||
278 | origskb = remove_monitor_info(local, origskb, rtap_len); | |
279 | ||
280 | if (!skb) | |
281 | return origskb; | |
282 | } | |
283 | ||
284 | /* if necessary, prepend radiotap information */ | |
601ae7f2 BR |
285 | if (!(status->flag & RX_FLAG_RADIOTAP)) |
286 | ieee80211_add_rx_radiotap_header(local, skb, status, rate, | |
287 | needed_headroom); | |
b2e7771e | 288 | |
ce3edf6d | 289 | skb_reset_mac_header(skb); |
b2e7771e JB |
290 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
291 | skb->pkt_type = PACKET_OTHERHOST; | |
292 | skb->protocol = htons(ETH_P_802_2); | |
293 | ||
294 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
295 | if (!netif_running(sdata->dev)) | |
296 | continue; | |
297 | ||
51fb61e7 | 298 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR) |
b2e7771e JB |
299 | continue; |
300 | ||
3d30d949 MW |
301 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
302 | continue; | |
303 | ||
b2e7771e JB |
304 | if (prev_dev) { |
305 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
306 | if (skb2) { | |
307 | skb2->dev = prev_dev; | |
308 | netif_rx(skb2); | |
309 | } | |
310 | } | |
311 | ||
312 | prev_dev = sdata->dev; | |
313 | sdata->dev->stats.rx_packets++; | |
314 | sdata->dev->stats.rx_bytes += skb->len; | |
315 | } | |
316 | ||
317 | if (prev_dev) { | |
318 | skb->dev = prev_dev; | |
319 | netif_rx(skb); | |
320 | } else | |
321 | dev_kfree_skb(skb); | |
322 | ||
323 | return origskb; | |
324 | } | |
325 | ||
326 | ||
5cf121c3 | 327 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 328 | { |
238f74a2 | 329 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
6e0d114d JB |
330 | int tid; |
331 | ||
332 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
333 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
334 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 335 | /* frame has qos control */ |
238f74a2 HH |
336 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
337 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
5cf121c3 | 338 | rx->flags |= IEEE80211_RX_AMSDU; |
fd4c7f2f | 339 | else |
5cf121c3 | 340 | rx->flags &= ~IEEE80211_RX_AMSDU; |
6e0d114d | 341 | } else { |
1411f9b5 JB |
342 | /* |
343 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
344 | * | |
345 | * Sequence numbers for management frames, QoS data | |
346 | * frames with a broadcast/multicast address in the | |
347 | * Address 1 field, and all non-QoS data frames sent | |
348 | * by QoS STAs are assigned using an additional single | |
349 | * modulo-4096 counter, [...] | |
350 | * | |
351 | * We also use that counter for non-QoS STAs. | |
352 | */ | |
353 | tid = NUM_RX_DATA_QUEUES - 1; | |
6e0d114d | 354 | } |
52865dfd | 355 | |
5cf121c3 | 356 | rx->queue = tid; |
6e0d114d JB |
357 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
358 | * For now, set skb->priority to 0 for other cases. */ | |
359 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 360 | } |
6e0d114d | 361 | |
5cf121c3 | 362 | static void ieee80211_verify_ip_alignment(struct ieee80211_rx_data *rx) |
38f3714d JB |
363 | { |
364 | #ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT | |
a7767f95 | 365 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
38f3714d JB |
366 | int hdrlen; |
367 | ||
a7767f95 | 368 | if (!ieee80211_is_data_present(hdr->frame_control)) |
38f3714d JB |
369 | return; |
370 | ||
371 | /* | |
372 | * Drivers are required to align the payload data in a way that | |
373 | * guarantees that the contained IP header is aligned to a four- | |
374 | * byte boundary. In the case of regular frames, this simply means | |
375 | * aligning the payload to a four-byte boundary (because either | |
376 | * the IP header is directly contained, or IV/RFC1042 headers that | |
377 | * have a length divisible by four are in front of it. | |
378 | * | |
379 | * With A-MSDU frames, however, the payload data address must | |
380 | * yield two modulo four because there are 14-byte 802.3 headers | |
381 | * within the A-MSDU frames that push the IP header further back | |
382 | * to a multiple of four again. Thankfully, the specs were sane | |
383 | * enough this time around to require padding each A-MSDU subframe | |
384 | * to a length that is a multiple of four. | |
385 | * | |
386 | * Padding like atheros hardware adds which is inbetween the 802.11 | |
387 | * header and the payload is not supported, the driver is required | |
388 | * to move the 802.11 header further back in that case. | |
389 | */ | |
a7767f95 | 390 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
5cf121c3 | 391 | if (rx->flags & IEEE80211_RX_AMSDU) |
38f3714d JB |
392 | hdrlen += ETH_HLEN; |
393 | WARN_ON_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3); | |
394 | #endif | |
6e0d114d JB |
395 | } |
396 | ||
6368e4b1 | 397 | |
571ecf67 JB |
398 | /* rx handlers */ |
399 | ||
49461622 | 400 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 401 | ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) |
571ecf67 JB |
402 | { |
403 | struct ieee80211_local *local = rx->local; | |
404 | struct sk_buff *skb = rx->skb; | |
405 | ||
c2b13452 JB |
406 | if (unlikely(local->hw_scanning)) |
407 | return ieee80211_scan_rx(rx->sdata, skb, rx->status); | |
ece8eddd | 408 | |
c2b13452 | 409 | if (unlikely(local->sw_scanning)) { |
ece8eddd | 410 | /* drop all the other packets during a software scan anyway */ |
c2b13452 | 411 | if (ieee80211_scan_rx(rx->sdata, skb, rx->status) |
9ae54c84 | 412 | != RX_QUEUED) |
ece8eddd | 413 | dev_kfree_skb(skb); |
9ae54c84 | 414 | return RX_QUEUED; |
571ecf67 JB |
415 | } |
416 | ||
5cf121c3 | 417 | if (unlikely(rx->flags & IEEE80211_RX_IN_SCAN)) { |
571ecf67 JB |
418 | /* scanning finished during invoking of handlers */ |
419 | I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); | |
e4c26add | 420 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
421 | } |
422 | ||
9ae54c84 | 423 | return RX_CONTINUE; |
571ecf67 JB |
424 | } |
425 | ||
33b64eb2 | 426 | static ieee80211_rx_result |
5cf121c3 | 427 | ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 428 | { |
a7767f95 HH |
429 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
430 | unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
d6d1a5a7 | 431 | |
a7767f95 HH |
432 | if (ieee80211_is_data(hdr->frame_control)) { |
433 | if (!ieee80211_has_a4(hdr->frame_control)) | |
33b64eb2 LCC |
434 | return RX_DROP_MONITOR; |
435 | if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0) | |
436 | return RX_DROP_MONITOR; | |
437 | } | |
438 | ||
439 | /* If there is not an established peer link and this is not a peer link | |
440 | * establisment frame, beacon or probe, drop the frame. | |
441 | */ | |
442 | ||
b4e08ea1 | 443 | if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) { |
33b64eb2 | 444 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 445 | |
a7767f95 | 446 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
447 | return RX_DROP_MONITOR; |
448 | ||
a7767f95 | 449 | if (ieee80211_is_action(hdr->frame_control)) { |
33b64eb2 LCC |
450 | mgmt = (struct ieee80211_mgmt *)hdr; |
451 | if (mgmt->u.action.category != PLINK_CATEGORY) | |
452 | return RX_DROP_MONITOR; | |
33b64eb2 | 453 | return RX_CONTINUE; |
33b64eb2 LCC |
454 | } |
455 | ||
a7767f95 HH |
456 | if (ieee80211_is_probe_req(hdr->frame_control) || |
457 | ieee80211_is_probe_resp(hdr->frame_control) || | |
458 | ieee80211_is_beacon(hdr->frame_control)) | |
459 | return RX_CONTINUE; | |
460 | ||
461 | return RX_DROP_MONITOR; | |
462 | ||
463 | } | |
464 | ||
465 | #define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l)) | |
466 | ||
467 | if (ieee80211_is_data(hdr->frame_control) && | |
468 | is_multicast_ether_addr(hdr->addr1) && | |
f698d856 | 469 | mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->sdata)) |
33b64eb2 | 470 | return RX_DROP_MONITOR; |
902acc78 | 471 | #undef msh_h_get |
d6d1a5a7 | 472 | |
902acc78 JB |
473 | return RX_CONTINUE; |
474 | } | |
33b64eb2 LCC |
475 | |
476 | ||
49461622 | 477 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 478 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 479 | { |
a7767f95 | 480 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
571ecf67 JB |
481 | |
482 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
483 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 484 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
5cf121c3 | 485 | rx->sta->last_seq_ctrl[rx->queue] == |
571ecf67 | 486 | hdr->seq_ctrl)) { |
5cf121c3 | 487 | if (rx->flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
488 | rx->local->dot11FrameDuplicateCount++; |
489 | rx->sta->num_duplicates++; | |
490 | } | |
e4c26add | 491 | return RX_DROP_MONITOR; |
571ecf67 | 492 | } else |
5cf121c3 | 493 | rx->sta->last_seq_ctrl[rx->queue] = hdr->seq_ctrl; |
571ecf67 JB |
494 | } |
495 | ||
571ecf67 JB |
496 | if (unlikely(rx->skb->len < 16)) { |
497 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 498 | return RX_DROP_MONITOR; |
571ecf67 JB |
499 | } |
500 | ||
571ecf67 JB |
501 | /* Drop disallowed frame classes based on STA auth/assoc state; |
502 | * IEEE 802.11, Chap 5.5. | |
503 | * | |
ccd7b362 JB |
504 | * mac80211 filters only based on association state, i.e. it drops |
505 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
506 | * deauth/disassoc frames when needed. In addition, hostapd is |
507 | * responsible for filtering on both auth and assoc states. | |
508 | */ | |
33b64eb2 | 509 | |
902acc78 | 510 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 511 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 512 | |
a7767f95 HH |
513 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
514 | ieee80211_is_pspoll(hdr->frame_control)) && | |
51fb61e7 | 515 | rx->sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
07346f81 | 516 | (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) { |
a7767f95 HH |
517 | if ((!ieee80211_has_fromds(hdr->frame_control) && |
518 | !ieee80211_has_tods(hdr->frame_control) && | |
519 | ieee80211_is_data(hdr->frame_control)) || | |
520 | !(rx->flags & IEEE80211_RX_RA_MATCH)) { | |
571ecf67 JB |
521 | /* Drop IBSS frames and frames for other hosts |
522 | * silently. */ | |
e4c26add | 523 | return RX_DROP_MONITOR; |
571ecf67 JB |
524 | } |
525 | ||
e4c26add | 526 | return RX_DROP_MONITOR; |
571ecf67 JB |
527 | } |
528 | ||
9ae54c84 | 529 | return RX_CONTINUE; |
570bd537 JB |
530 | } |
531 | ||
532 | ||
49461622 | 533 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 534 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
570bd537 | 535 | { |
a7767f95 | 536 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
3017b80b JB |
537 | int keyidx; |
538 | int hdrlen; | |
e4c26add | 539 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
d4e46a3d | 540 | struct ieee80211_key *stakey = NULL; |
570bd537 | 541 | |
3017b80b JB |
542 | /* |
543 | * Key selection 101 | |
544 | * | |
545 | * There are three types of keys: | |
546 | * - GTK (group keys) | |
547 | * - PTK (pairwise keys) | |
548 | * - STK (station-to-station pairwise keys) | |
549 | * | |
550 | * When selecting a key, we have to distinguish between multicast | |
551 | * (including broadcast) and unicast frames, the latter can only | |
552 | * use PTKs and STKs while the former always use GTKs. Unless, of | |
553 | * course, actual WEP keys ("pre-RSNA") are used, then unicast | |
554 | * frames can also use key indizes like GTKs. Hence, if we don't | |
555 | * have a PTK/STK we check the key index for a WEP key. | |
556 | * | |
8dc06a1c JB |
557 | * Note that in a regular BSS, multicast frames are sent by the |
558 | * AP only, associated stations unicast the frame to the AP first | |
559 | * which then multicasts it on their behalf. | |
560 | * | |
3017b80b JB |
561 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
562 | * with each station, that is something we don't currently handle. | |
8dc06a1c JB |
563 | * The spec seems to expect that one negotiates the same key with |
564 | * every station but there's no such requirement; VLANs could be | |
565 | * possible. | |
3017b80b JB |
566 | */ |
567 | ||
a7767f95 | 568 | if (!ieee80211_has_protected(hdr->frame_control)) |
9ae54c84 | 569 | return RX_CONTINUE; |
571ecf67 | 570 | |
3017b80b | 571 | /* |
1990af8d | 572 | * No point in finding a key and decrypting if the frame is neither |
3017b80b JB |
573 | * addressed to us nor a multicast frame. |
574 | */ | |
5cf121c3 | 575 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 576 | return RX_CONTINUE; |
3017b80b | 577 | |
d4e46a3d JB |
578 | if (rx->sta) |
579 | stakey = rcu_dereference(rx->sta->key); | |
580 | ||
581 | if (!is_multicast_ether_addr(hdr->addr1) && stakey) { | |
582 | rx->key = stakey; | |
571ecf67 | 583 | } else { |
3017b80b JB |
584 | /* |
585 | * The device doesn't give us the IV so we won't be | |
586 | * able to look up the key. That's ok though, we | |
587 | * don't need to decrypt the frame, we just won't | |
588 | * be able to keep statistics accurate. | |
589 | * Except for key threshold notifications, should | |
590 | * we somehow allow the driver to tell us which key | |
591 | * the hardware used if this flag is set? | |
592 | */ | |
5cf121c3 JB |
593 | if ((rx->status->flag & RX_FLAG_DECRYPTED) && |
594 | (rx->status->flag & RX_FLAG_IV_STRIPPED)) | |
9ae54c84 | 595 | return RX_CONTINUE; |
3017b80b | 596 | |
a7767f95 | 597 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
3017b80b JB |
598 | |
599 | if (rx->skb->len < 8 + hdrlen) | |
e4c26add | 600 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
3017b80b JB |
601 | |
602 | /* | |
603 | * no need to call ieee80211_wep_get_keyidx, | |
604 | * it verifies a bunch of things we've done already | |
605 | */ | |
606 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
607 | ||
d4e46a3d | 608 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
3017b80b JB |
609 | |
610 | /* | |
611 | * RSNA-protected unicast frames should always be sent with | |
612 | * pairwise or station-to-station keys, but for WEP we allow | |
613 | * using a key index as well. | |
614 | */ | |
8f20fc24 | 615 | if (rx->key && rx->key->conf.alg != ALG_WEP && |
3017b80b JB |
616 | !is_multicast_ether_addr(hdr->addr1)) |
617 | rx->key = NULL; | |
571ecf67 JB |
618 | } |
619 | ||
3017b80b | 620 | if (rx->key) { |
571ecf67 | 621 | rx->key->tx_rx_count++; |
011bfcc4 | 622 | /* TODO: add threshold stuff again */ |
1990af8d | 623 | } else { |
e4c26add | 624 | return RX_DROP_MONITOR; |
70f08765 JB |
625 | } |
626 | ||
1990af8d JB |
627 | /* Check for weak IVs if possible */ |
628 | if (rx->sta && rx->key->conf.alg == ALG_WEP && | |
a7767f95 | 629 | ieee80211_is_data(hdr->frame_control) && |
5cf121c3 JB |
630 | (!(rx->status->flag & RX_FLAG_IV_STRIPPED) || |
631 | !(rx->status->flag & RX_FLAG_DECRYPTED)) && | |
1990af8d JB |
632 | ieee80211_wep_is_weak_iv(rx->skb, rx->key)) |
633 | rx->sta->wep_weak_iv_count++; | |
634 | ||
70f08765 JB |
635 | switch (rx->key->conf.alg) { |
636 | case ALG_WEP: | |
e2f036da MN |
637 | result = ieee80211_crypto_wep_decrypt(rx); |
638 | break; | |
70f08765 | 639 | case ALG_TKIP: |
e2f036da MN |
640 | result = ieee80211_crypto_tkip_decrypt(rx); |
641 | break; | |
70f08765 | 642 | case ALG_CCMP: |
e2f036da MN |
643 | result = ieee80211_crypto_ccmp_decrypt(rx); |
644 | break; | |
70f08765 JB |
645 | } |
646 | ||
e2f036da | 647 | /* either the frame has been decrypted or will be dropped */ |
5cf121c3 | 648 | rx->status->flag |= RX_FLAG_DECRYPTED; |
e2f036da MN |
649 | |
650 | return result; | |
70f08765 JB |
651 | } |
652 | ||
571ecf67 JB |
653 | static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta) |
654 | { | |
655 | struct ieee80211_sub_if_data *sdata; | |
0795af57 JP |
656 | DECLARE_MAC_BUF(mac); |
657 | ||
d0709a65 | 658 | sdata = sta->sdata; |
571ecf67 | 659 | |
3e122be0 | 660 | atomic_inc(&sdata->bss->num_sta_ps); |
07346f81 | 661 | set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL); |
571ecf67 | 662 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
663 | printk(KERN_DEBUG "%s: STA %s aid %d enters power save mode\n", |
664 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 JB |
665 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
666 | } | |
667 | ||
668 | static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) | |
669 | { | |
670 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
671 | struct sk_buff *skb; | |
672 | int sent = 0; | |
673 | struct ieee80211_sub_if_data *sdata; | |
e039fa4a | 674 | struct ieee80211_tx_info *info; |
0795af57 | 675 | DECLARE_MAC_BUF(mac); |
571ecf67 | 676 | |
d0709a65 | 677 | sdata = sta->sdata; |
004c872e | 678 | |
3e122be0 | 679 | atomic_dec(&sdata->bss->num_sta_ps); |
004c872e | 680 | |
07346f81 | 681 | clear_sta_flags(sta, WLAN_STA_PS | WLAN_STA_PSPOLL); |
004c872e JB |
682 | |
683 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
684 | sta_info_clear_tim_bit(sta); | |
685 | ||
571ecf67 | 686 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
687 | printk(KERN_DEBUG "%s: STA %s aid %d exits power save mode\n", |
688 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 | 689 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
004c872e | 690 | |
571ecf67 JB |
691 | /* Send all buffered frames to the station */ |
692 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
e039fa4a | 693 | info = IEEE80211_SKB_CB(skb); |
571ecf67 | 694 | sent++; |
e039fa4a | 695 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
571ecf67 JB |
696 | dev_queue_xmit(skb); |
697 | } | |
698 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
e039fa4a | 699 | info = IEEE80211_SKB_CB(skb); |
571ecf67 JB |
700 | local->total_ps_buffered--; |
701 | sent++; | |
702 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 | 703 | printk(KERN_DEBUG "%s: STA %s aid %d send PS frame " |
571ecf67 | 704 | "since STA not sleeping anymore\n", dev->name, |
0795af57 | 705 | print_mac(mac, sta->addr), sta->aid); |
571ecf67 | 706 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
e039fa4a | 707 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
571ecf67 JB |
708 | dev_queue_xmit(skb); |
709 | } | |
710 | ||
711 | return sent; | |
712 | } | |
713 | ||
49461622 | 714 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 715 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
716 | { |
717 | struct sta_info *sta = rx->sta; | |
718 | struct net_device *dev = rx->dev; | |
a7767f95 | 719 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
571ecf67 JB |
720 | |
721 | if (!sta) | |
9ae54c84 | 722 | return RX_CONTINUE; |
571ecf67 JB |
723 | |
724 | /* Update last_rx only for IBSS packets which are for the current | |
725 | * BSSID to avoid keeping the current IBSS network alive in cases where | |
726 | * other STAs are using different BSSID. */ | |
51fb61e7 | 727 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
71364716 RR |
728 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
729 | IEEE80211_IF_TYPE_IBSS); | |
571ecf67 JB |
730 | if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) |
731 | sta->last_rx = jiffies; | |
732 | } else | |
733 | if (!is_multicast_ether_addr(hdr->addr1) || | |
51fb61e7 | 734 | rx->sdata->vif.type == IEEE80211_IF_TYPE_STA) { |
571ecf67 JB |
735 | /* Update last_rx only for unicast frames in order to prevent |
736 | * the Probe Request frames (the only broadcast frames from a | |
737 | * STA in infrastructure mode) from keeping a connection alive. | |
33b64eb2 LCC |
738 | * Mesh beacons will update last_rx when if they are found to |
739 | * match the current local configuration when processed. | |
571ecf67 JB |
740 | */ |
741 | sta->last_rx = jiffies; | |
742 | } | |
743 | ||
5cf121c3 | 744 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 745 | return RX_CONTINUE; |
571ecf67 JB |
746 | |
747 | sta->rx_fragments++; | |
748 | sta->rx_bytes += rx->skb->len; | |
5cf121c3 | 749 | sta->last_signal = rx->status->signal; |
566bfe5a | 750 | sta->last_qual = rx->status->qual; |
5cf121c3 | 751 | sta->last_noise = rx->status->noise; |
571ecf67 | 752 | |
3e122be0 JB |
753 | if (!ieee80211_has_morefrags(hdr->frame_control) && |
754 | (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP || | |
755 | rx->sdata->vif.type == IEEE80211_IF_TYPE_VLAN)) { | |
571ecf67 JB |
756 | /* Change STA power saving mode only in the end of a frame |
757 | * exchange sequence */ | |
07346f81 | 758 | if (test_sta_flags(sta, WLAN_STA_PS) && |
a7767f95 | 759 | !ieee80211_has_pm(hdr->frame_control)) |
5cf121c3 | 760 | rx->sent_ps_buffered += ap_sta_ps_end(dev, sta); |
07346f81 | 761 | else if (!test_sta_flags(sta, WLAN_STA_PS) && |
a7767f95 | 762 | ieee80211_has_pm(hdr->frame_control)) |
571ecf67 JB |
763 | ap_sta_ps_start(dev, sta); |
764 | } | |
765 | ||
766 | /* Drop data::nullfunc frames silently, since they are used only to | |
767 | * control station power saving mode. */ | |
a7767f95 | 768 | if (ieee80211_is_nullfunc(hdr->frame_control)) { |
571ecf67 JB |
769 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
770 | /* Update counter and free packet here to avoid counting this | |
771 | * as a dropped packed. */ | |
772 | sta->rx_packets++; | |
773 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 774 | return RX_QUEUED; |
571ecf67 JB |
775 | } |
776 | ||
9ae54c84 | 777 | return RX_CONTINUE; |
571ecf67 JB |
778 | } /* ieee80211_rx_h_sta_process */ |
779 | ||
571ecf67 JB |
780 | static inline struct ieee80211_fragment_entry * |
781 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
782 | unsigned int frag, unsigned int seq, int rx_queue, | |
783 | struct sk_buff **skb) | |
784 | { | |
785 | struct ieee80211_fragment_entry *entry; | |
786 | int idx; | |
787 | ||
788 | idx = sdata->fragment_next; | |
789 | entry = &sdata->fragments[sdata->fragment_next++]; | |
790 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
791 | sdata->fragment_next = 0; | |
792 | ||
793 | if (!skb_queue_empty(&entry->skb_list)) { | |
f4ea83dd | 794 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
571ecf67 JB |
795 | struct ieee80211_hdr *hdr = |
796 | (struct ieee80211_hdr *) entry->skb_list.next->data; | |
0795af57 JP |
797 | DECLARE_MAC_BUF(mac); |
798 | DECLARE_MAC_BUF(mac2); | |
571ecf67 JB |
799 | printk(KERN_DEBUG "%s: RX reassembly removed oldest " |
800 | "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " | |
0795af57 | 801 | "addr1=%s addr2=%s\n", |
571ecf67 JB |
802 | sdata->dev->name, idx, |
803 | jiffies - entry->first_frag_time, entry->seq, | |
0795af57 JP |
804 | entry->last_frag, print_mac(mac, hdr->addr1), |
805 | print_mac(mac2, hdr->addr2)); | |
f4ea83dd | 806 | #endif |
571ecf67 JB |
807 | __skb_queue_purge(&entry->skb_list); |
808 | } | |
809 | ||
810 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
811 | *skb = NULL; | |
812 | entry->first_frag_time = jiffies; | |
813 | entry->seq = seq; | |
814 | entry->rx_queue = rx_queue; | |
815 | entry->last_frag = frag; | |
816 | entry->ccmp = 0; | |
817 | entry->extra_len = 0; | |
818 | ||
819 | return entry; | |
820 | } | |
821 | ||
822 | static inline struct ieee80211_fragment_entry * | |
823 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 824 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
825 | int rx_queue, struct ieee80211_hdr *hdr) |
826 | { | |
827 | struct ieee80211_fragment_entry *entry; | |
828 | int i, idx; | |
829 | ||
830 | idx = sdata->fragment_next; | |
831 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
832 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
833 | |
834 | idx--; | |
835 | if (idx < 0) | |
836 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
837 | ||
838 | entry = &sdata->fragments[idx]; | |
839 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
840 | entry->rx_queue != rx_queue || | |
841 | entry->last_frag + 1 != frag) | |
842 | continue; | |
843 | ||
b73d70ad | 844 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 845 | |
b73d70ad HH |
846 | /* |
847 | * Check ftype and addresses are equal, else check next fragment | |
848 | */ | |
849 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
850 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
571ecf67 JB |
851 | compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || |
852 | compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) | |
853 | continue; | |
854 | ||
ab46623e | 855 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
856 | __skb_queue_purge(&entry->skb_list); |
857 | continue; | |
858 | } | |
859 | return entry; | |
860 | } | |
861 | ||
862 | return NULL; | |
863 | } | |
864 | ||
49461622 | 865 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 866 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
867 | { |
868 | struct ieee80211_hdr *hdr; | |
869 | u16 sc; | |
358c8d9d | 870 | __le16 fc; |
571ecf67 JB |
871 | unsigned int frag, seq; |
872 | struct ieee80211_fragment_entry *entry; | |
873 | struct sk_buff *skb; | |
0795af57 | 874 | DECLARE_MAC_BUF(mac); |
571ecf67 | 875 | |
b73d70ad | 876 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 877 | fc = hdr->frame_control; |
571ecf67 JB |
878 | sc = le16_to_cpu(hdr->seq_ctrl); |
879 | frag = sc & IEEE80211_SCTL_FRAG; | |
880 | ||
358c8d9d | 881 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
882 | (rx->skb)->len < 24 || |
883 | is_multicast_ether_addr(hdr->addr1))) { | |
884 | /* not fragmented */ | |
885 | goto out; | |
886 | } | |
887 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
888 | ||
889 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
890 | ||
891 | if (frag == 0) { | |
892 | /* This is the first fragment of a new frame. */ | |
893 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
5cf121c3 | 894 | rx->queue, &(rx->skb)); |
8f20fc24 | 895 | if (rx->key && rx->key->conf.alg == ALG_CCMP && |
358c8d9d | 896 | ieee80211_has_protected(fc)) { |
571ecf67 JB |
897 | /* Store CCMP PN so that we can verify that the next |
898 | * fragment has a sequential PN value. */ | |
899 | entry->ccmp = 1; | |
900 | memcpy(entry->last_pn, | |
5cf121c3 | 901 | rx->key->u.ccmp.rx_pn[rx->queue], |
571ecf67 JB |
902 | CCMP_PN_LEN); |
903 | } | |
9ae54c84 | 904 | return RX_QUEUED; |
571ecf67 JB |
905 | } |
906 | ||
907 | /* This is a fragment for a frame that should already be pending in | |
908 | * fragment cache. Add this fragment to the end of the pending entry. | |
909 | */ | |
b73d70ad | 910 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, rx->queue, hdr); |
571ecf67 JB |
911 | if (!entry) { |
912 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 913 | return RX_DROP_MONITOR; |
571ecf67 JB |
914 | } |
915 | ||
916 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
917 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
918 | if (entry->ccmp) { | |
919 | int i; | |
920 | u8 pn[CCMP_PN_LEN], *rpn; | |
8f20fc24 | 921 | if (!rx->key || rx->key->conf.alg != ALG_CCMP) |
e4c26add | 922 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
923 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); |
924 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
925 | pn[i]++; | |
926 | if (pn[i]) | |
927 | break; | |
928 | } | |
5cf121c3 | 929 | rpn = rx->key->u.ccmp.rx_pn[rx->queue]; |
f4ea83dd | 930 | if (memcmp(pn, rpn, CCMP_PN_LEN)) |
e4c26add | 931 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
932 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); |
933 | } | |
934 | ||
358c8d9d | 935 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
936 | __skb_queue_tail(&entry->skb_list, rx->skb); |
937 | entry->last_frag = frag; | |
938 | entry->extra_len += rx->skb->len; | |
358c8d9d | 939 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 940 | rx->skb = NULL; |
9ae54c84 | 941 | return RX_QUEUED; |
571ecf67 JB |
942 | } |
943 | ||
944 | rx->skb = __skb_dequeue(&entry->skb_list); | |
945 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
946 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
947 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
948 | GFP_ATOMIC))) { | |
949 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
950 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 951 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
952 | } |
953 | } | |
954 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
955 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
956 | dev_kfree_skb(skb); | |
957 | } | |
958 | ||
959 | /* Complete frame has been reassembled - process it now */ | |
5cf121c3 | 960 | rx->flags |= IEEE80211_RX_FRAGMENTED; |
571ecf67 JB |
961 | |
962 | out: | |
963 | if (rx->sta) | |
964 | rx->sta->rx_packets++; | |
965 | if (is_multicast_ether_addr(hdr->addr1)) | |
966 | rx->local->dot11MulticastReceivedFrameCount++; | |
967 | else | |
968 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 969 | return RX_CONTINUE; |
571ecf67 JB |
970 | } |
971 | ||
49461622 | 972 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 973 | ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx) |
571ecf67 | 974 | { |
98f0b0a3 | 975 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); |
571ecf67 JB |
976 | struct sk_buff *skb; |
977 | int no_pending_pkts; | |
0795af57 | 978 | DECLARE_MAC_BUF(mac); |
358c8d9d | 979 | __le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control; |
571ecf67 | 980 | |
358c8d9d | 981 | if (likely(!rx->sta || !ieee80211_is_pspoll(fc) || |
5cf121c3 | 982 | !(rx->flags & IEEE80211_RX_RA_MATCH))) |
9ae54c84 | 983 | return RX_CONTINUE; |
571ecf67 | 984 | |
51fb61e7 JB |
985 | if ((sdata->vif.type != IEEE80211_IF_TYPE_AP) && |
986 | (sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) | |
e4c26add | 987 | return RX_DROP_UNUSABLE; |
98f0b0a3 | 988 | |
571ecf67 JB |
989 | skb = skb_dequeue(&rx->sta->tx_filtered); |
990 | if (!skb) { | |
991 | skb = skb_dequeue(&rx->sta->ps_tx_buf); | |
992 | if (skb) | |
993 | rx->local->total_ps_buffered--; | |
994 | } | |
995 | no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && | |
996 | skb_queue_empty(&rx->sta->ps_tx_buf); | |
997 | ||
998 | if (skb) { | |
999 | struct ieee80211_hdr *hdr = | |
1000 | (struct ieee80211_hdr *) skb->data; | |
1001 | ||
4a9a66e9 JB |
1002 | /* |
1003 | * Tell TX path to send one frame even though the STA may | |
1004 | * still remain is PS mode after this frame exchange. | |
1005 | */ | |
07346f81 | 1006 | set_sta_flags(rx->sta, WLAN_STA_PSPOLL); |
571ecf67 JB |
1007 | |
1008 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 JP |
1009 | printk(KERN_DEBUG "STA %s aid %d: PS Poll (entries after %d)\n", |
1010 | print_mac(mac, rx->sta->addr), rx->sta->aid, | |
571ecf67 JB |
1011 | skb_queue_len(&rx->sta->ps_tx_buf)); |
1012 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1013 | ||
1014 | /* Use MoreData flag to indicate whether there are more | |
1015 | * buffered frames for this STA */ | |
836341a7 | 1016 | if (no_pending_pkts) |
571ecf67 | 1017 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); |
836341a7 | 1018 | else |
571ecf67 JB |
1019 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
1020 | ||
1021 | dev_queue_xmit(skb); | |
1022 | ||
004c872e JB |
1023 | if (no_pending_pkts) |
1024 | sta_info_clear_tim_bit(rx->sta); | |
571ecf67 | 1025 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
5cf121c3 | 1026 | } else if (!rx->sent_ps_buffered) { |
004c872e JB |
1027 | /* |
1028 | * FIXME: This can be the result of a race condition between | |
1029 | * us expiring a frame and the station polling for it. | |
1030 | * Should we send it a null-func frame indicating we | |
1031 | * have nothing buffered for it? | |
1032 | */ | |
0795af57 | 1033 | printk(KERN_DEBUG "%s: STA %s sent PS Poll even " |
f4ea83dd | 1034 | "though there are no buffered frames for it\n", |
0795af57 | 1035 | rx->dev->name, print_mac(mac, rx->sta->addr)); |
571ecf67 | 1036 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
571ecf67 JB |
1037 | } |
1038 | ||
9ae54c84 | 1039 | /* Free PS Poll skb here instead of returning RX_DROP that would |
571ecf67 JB |
1040 | * count as an dropped frame. */ |
1041 | dev_kfree_skb(rx->skb); | |
1042 | ||
9ae54c84 | 1043 | return RX_QUEUED; |
571ecf67 JB |
1044 | } |
1045 | ||
49461622 | 1046 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1047 | ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx) |
6e0d114d | 1048 | { |
6e0d114d | 1049 | u8 *data = rx->skb->data; |
238f74a2 | 1050 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data; |
6e0d114d | 1051 | |
238f74a2 | 1052 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
9ae54c84 | 1053 | return RX_CONTINUE; |
6e0d114d JB |
1054 | |
1055 | /* remove the qos control field, update frame type and meta-data */ | |
238f74a2 HH |
1056 | memmove(data + IEEE80211_QOS_CTL_LEN, data, |
1057 | ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN); | |
1058 | hdr = (struct ieee80211_hdr *)skb_pull(rx->skb, IEEE80211_QOS_CTL_LEN); | |
6e0d114d | 1059 | /* change frame type to non QOS */ |
238f74a2 | 1060 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
6e0d114d | 1061 | |
9ae54c84 | 1062 | return RX_CONTINUE; |
6e0d114d JB |
1063 | } |
1064 | ||
76ee65bf | 1065 | static int |
5cf121c3 | 1066 | ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1067 | { |
07346f81 | 1068 | if (unlikely(!rx->sta || |
f4ea83dd | 1069 | !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1070 | return -EACCES; |
571ecf67 | 1071 | |
76ee65bf | 1072 | return 0; |
571ecf67 JB |
1073 | } |
1074 | ||
76ee65bf | 1075 | static int |
358c8d9d | 1076 | ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1077 | { |
3017b80b | 1078 | /* |
7848ba7d JB |
1079 | * Pass through unencrypted frames if the hardware has |
1080 | * decrypted them already. | |
3017b80b | 1081 | */ |
5cf121c3 | 1082 | if (rx->status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1083 | return 0; |
571ecf67 JB |
1084 | |
1085 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1086 | if (unlikely(!ieee80211_has_protected(fc) && |
1087 | !ieee80211_is_nullfunc(fc) && | |
b3fc9c6c | 1088 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1089 | return -EACCES; |
b3fc9c6c | 1090 | |
76ee65bf | 1091 | return 0; |
571ecf67 JB |
1092 | } |
1093 | ||
76ee65bf | 1094 | static int |
5cf121c3 | 1095 | ieee80211_data_to_8023(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1096 | { |
1097 | struct net_device *dev = rx->dev; | |
571ecf67 | 1098 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; |
b73d70ad | 1099 | u16 hdrlen, ethertype; |
571ecf67 JB |
1100 | u8 *payload; |
1101 | u8 dst[ETH_ALEN]; | |
c97c23e3 | 1102 | u8 src[ETH_ALEN] __aligned(2); |
76ee65bf | 1103 | struct sk_buff *skb = rx->skb; |
571ecf67 | 1104 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 JP |
1105 | DECLARE_MAC_BUF(mac); |
1106 | DECLARE_MAC_BUF(mac2); | |
1107 | DECLARE_MAC_BUF(mac3); | |
1108 | DECLARE_MAC_BUF(mac4); | |
571ecf67 | 1109 | |
b73d70ad | 1110 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
76ee65bf | 1111 | return -1; |
571ecf67 | 1112 | |
b73d70ad | 1113 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
571ecf67 | 1114 | |
e32f85f7 LCC |
1115 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1116 | hdrlen += ieee80211_get_mesh_hdrlen( | |
33b64eb2 | 1117 | (struct ieee80211s_hdr *) (skb->data + hdrlen)); |
33b64eb2 | 1118 | |
571ecf67 JB |
1119 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet |
1120 | * header | |
1121 | * IEEE 802.11 address fields: | |
1122 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
1123 | * 0 0 DA SA BSSID n/a | |
1124 | * 0 1 DA BSSID SA n/a | |
1125 | * 1 0 BSSID SA DA n/a | |
1126 | * 1 1 RA TA DA SA | |
1127 | */ | |
b73d70ad HH |
1128 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); |
1129 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); | |
571ecf67 | 1130 | |
b73d70ad HH |
1131 | switch (hdr->frame_control & |
1132 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
1133 | case __constant_cpu_to_le16(IEEE80211_FCTL_TODS): | |
51fb61e7 | 1134 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_AP && |
f4ea83dd | 1135 | sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) |
76ee65bf | 1136 | return -1; |
571ecf67 | 1137 | break; |
b73d70ad HH |
1138 | case __constant_cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): |
1139 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_WDS && | |
f4ea83dd | 1140 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) |
76ee65bf | 1141 | return -1; |
571ecf67 | 1142 | break; |
b73d70ad | 1143 | case __constant_cpu_to_le16(IEEE80211_FCTL_FROMDS): |
51fb61e7 | 1144 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA || |
b3316157 JL |
1145 | (is_multicast_ether_addr(dst) && |
1146 | !compare_ether_addr(src, dev->dev_addr))) | |
76ee65bf | 1147 | return -1; |
571ecf67 | 1148 | break; |
b73d70ad | 1149 | case __constant_cpu_to_le16(0): |
f4ea83dd | 1150 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
76ee65bf | 1151 | return -1; |
571ecf67 JB |
1152 | break; |
1153 | } | |
1154 | ||
f4ea83dd | 1155 | if (unlikely(skb->len - hdrlen < 8)) |
76ee65bf | 1156 | return -1; |
571ecf67 | 1157 | |
76ee65bf | 1158 | payload = skb->data + hdrlen; |
571ecf67 JB |
1159 | ethertype = (payload[6] << 8) | payload[7]; |
1160 | ||
1161 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
1162 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
1163 | compare_ether_addr(payload, bridge_tunnel_header) == 0)) { | |
1164 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
1165 | * replace EtherType */ | |
1166 | skb_pull(skb, hdrlen + 6); | |
1167 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
1168 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
1169 | } else { | |
1170 | struct ethhdr *ehdr; | |
1171 | __be16 len; | |
ce3edf6d | 1172 | |
571ecf67 JB |
1173 | skb_pull(skb, hdrlen); |
1174 | len = htons(skb->len); | |
1175 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
1176 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
1177 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
1178 | ehdr->h_proto = len; | |
1179 | } | |
76ee65bf RR |
1180 | return 0; |
1181 | } | |
571ecf67 | 1182 | |
ce3edf6d JB |
1183 | /* |
1184 | * requires that rx->skb is a frame with ethernet header | |
1185 | */ | |
358c8d9d | 1186 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1187 | { |
c97c23e3 | 1188 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1189 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1190 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1191 | ||
1192 | /* | |
1193 | * Allow EAPOL frames to us/the PAE group address regardless | |
1194 | * of whether the frame was encrypted or not. | |
1195 | */ | |
1196 | if (ehdr->h_proto == htons(ETH_P_PAE) && | |
1197 | (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 || | |
1198 | compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0)) | |
1199 | return true; | |
1200 | ||
1201 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1202 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1203 | return false; |
1204 | ||
1205 | return true; | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * requires that rx->skb is a frame with ethernet header | |
1210 | */ | |
76ee65bf | 1211 | static void |
5cf121c3 | 1212 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf RR |
1213 | { |
1214 | struct net_device *dev = rx->dev; | |
1215 | struct ieee80211_local *local = rx->local; | |
1216 | struct sk_buff *skb, *xmit_skb; | |
1217 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
ce3edf6d JB |
1218 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1219 | struct sta_info *dsta; | |
571ecf67 | 1220 | |
76ee65bf RR |
1221 | skb = rx->skb; |
1222 | xmit_skb = NULL; | |
571ecf67 | 1223 | |
213cd118 JB |
1224 | if ((sdata->vif.type == IEEE80211_IF_TYPE_AP || |
1225 | sdata->vif.type == IEEE80211_IF_TYPE_VLAN) && | |
1226 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && | |
5cf121c3 | 1227 | (rx->flags & IEEE80211_RX_RA_MATCH)) { |
ce3edf6d JB |
1228 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1229 | /* | |
1230 | * send multicast frames both to higher layers in | |
1231 | * local net stack and back to the wireless medium | |
1232 | */ | |
76ee65bf RR |
1233 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
1234 | if (!xmit_skb && net_ratelimit()) | |
571ecf67 JB |
1235 | printk(KERN_DEBUG "%s: failed to clone " |
1236 | "multicast frame\n", dev->name); | |
1237 | } else { | |
571ecf67 | 1238 | dsta = sta_info_get(local, skb->data); |
d0709a65 | 1239 | if (dsta && dsta->sdata->dev == dev) { |
ce3edf6d JB |
1240 | /* |
1241 | * The destination station is associated to | |
1242 | * this AP (in this VLAN), so send the frame | |
1243 | * directly to it and do not pass it to local | |
1244 | * net stack. | |
571ecf67 | 1245 | */ |
76ee65bf | 1246 | xmit_skb = skb; |
571ecf67 JB |
1247 | skb = NULL; |
1248 | } | |
571ecf67 JB |
1249 | } |
1250 | } | |
1251 | ||
1252 | if (skb) { | |
1253 | /* deliver to local stack */ | |
1254 | skb->protocol = eth_type_trans(skb, dev); | |
1255 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1256 | netif_rx(skb); | |
1257 | } | |
1258 | ||
76ee65bf | 1259 | if (xmit_skb) { |
571ecf67 | 1260 | /* send to wireless media */ |
f831e909 | 1261 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1262 | skb_reset_network_header(xmit_skb); |
1263 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1264 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1265 | } |
76ee65bf RR |
1266 | } |
1267 | ||
49461622 | 1268 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1269 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f RR |
1270 | { |
1271 | struct net_device *dev = rx->dev; | |
1272 | struct ieee80211_local *local = rx->local; | |
358c8d9d | 1273 | u16 ethertype; |
fd4c7f2f RR |
1274 | u8 *payload; |
1275 | struct sk_buff *skb = rx->skb, *frame = NULL; | |
358c8d9d HH |
1276 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
1277 | __le16 fc = hdr->frame_control; | |
fd4c7f2f RR |
1278 | const struct ethhdr *eth; |
1279 | int remaining, err; | |
1280 | u8 dst[ETH_ALEN]; | |
1281 | u8 src[ETH_ALEN]; | |
1282 | DECLARE_MAC_BUF(mac); | |
1283 | ||
358c8d9d | 1284 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 1285 | return RX_CONTINUE; |
fd4c7f2f | 1286 | |
358c8d9d | 1287 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 1288 | return RX_DROP_MONITOR; |
fd4c7f2f | 1289 | |
5cf121c3 | 1290 | if (!(rx->flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 1291 | return RX_CONTINUE; |
fd4c7f2f RR |
1292 | |
1293 | err = ieee80211_data_to_8023(rx); | |
1294 | if (unlikely(err)) | |
e4c26add | 1295 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1296 | |
1297 | skb->dev = dev; | |
1298 | ||
1299 | dev->stats.rx_packets++; | |
1300 | dev->stats.rx_bytes += skb->len; | |
1301 | ||
1302 | /* skip the wrapping header */ | |
1303 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
1304 | if (!eth) | |
e4c26add | 1305 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1306 | |
1307 | while (skb != frame) { | |
1308 | u8 padding; | |
1309 | __be16 len = eth->h_proto; | |
1310 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
1311 | ||
1312 | remaining = skb->len; | |
1313 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
1314 | memcpy(src, eth->h_source, ETH_ALEN); | |
1315 | ||
1316 | padding = ((4 - subframe_len) & 0x3); | |
1317 | /* the last MSDU has no padding */ | |
f4ea83dd | 1318 | if (subframe_len > remaining) |
e4c26add | 1319 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1320 | |
1321 | skb_pull(skb, sizeof(struct ethhdr)); | |
1322 | /* if last subframe reuse skb */ | |
1323 | if (remaining <= subframe_len + padding) | |
1324 | frame = skb; | |
1325 | else { | |
1326 | frame = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1327 | subframe_len); | |
1328 | ||
1329 | if (frame == NULL) | |
e4c26add | 1330 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1331 | |
1332 | skb_reserve(frame, local->hw.extra_tx_headroom + | |
1333 | sizeof(struct ethhdr)); | |
1334 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
1335 | ntohs(len)); | |
1336 | ||
1337 | eth = (struct ethhdr *) skb_pull(skb, ntohs(len) + | |
1338 | padding); | |
1339 | if (!eth) { | |
fd4c7f2f | 1340 | dev_kfree_skb(frame); |
e4c26add | 1341 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1342 | } |
1343 | } | |
1344 | ||
ce3edf6d | 1345 | skb_reset_network_header(frame); |
fd4c7f2f RR |
1346 | frame->dev = dev; |
1347 | frame->priority = skb->priority; | |
1348 | rx->skb = frame; | |
1349 | ||
fd4c7f2f RR |
1350 | payload = frame->data; |
1351 | ethertype = (payload[6] << 8) | payload[7]; | |
1352 | ||
1353 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
ce3edf6d JB |
1354 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
1355 | compare_ether_addr(payload, | |
1356 | bridge_tunnel_header) == 0)) { | |
fd4c7f2f RR |
1357 | /* remove RFC1042 or Bridge-Tunnel |
1358 | * encapsulation and replace EtherType */ | |
1359 | skb_pull(frame, 6); | |
1360 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
1361 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1362 | } else { | |
ce3edf6d JB |
1363 | memcpy(skb_push(frame, sizeof(__be16)), |
1364 | &len, sizeof(__be16)); | |
fd4c7f2f RR |
1365 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
1366 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1367 | } | |
1368 | ||
358c8d9d | 1369 | if (!ieee80211_frame_allowed(rx, fc)) { |
ce3edf6d | 1370 | if (skb == frame) /* last frame */ |
e4c26add | 1371 | return RX_DROP_UNUSABLE; |
ce3edf6d JB |
1372 | dev_kfree_skb(frame); |
1373 | continue; | |
1374 | } | |
fd4c7f2f RR |
1375 | |
1376 | ieee80211_deliver_skb(rx); | |
1377 | } | |
1378 | ||
9ae54c84 | 1379 | return RX_QUEUED; |
fd4c7f2f RR |
1380 | } |
1381 | ||
e32f85f7 LCC |
1382 | static ieee80211_rx_result debug_noinline |
1383 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) | |
1384 | { | |
1385 | struct ieee80211_hdr *hdr; | |
1386 | struct ieee80211s_hdr *mesh_hdr; | |
1387 | unsigned int hdrlen; | |
1388 | struct sk_buff *skb = rx->skb, *fwd_skb; | |
1389 | ||
1390 | hdr = (struct ieee80211_hdr *) skb->data; | |
1391 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1392 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
1393 | ||
1394 | if (!ieee80211_is_data(hdr->frame_control)) | |
1395 | return RX_CONTINUE; | |
1396 | ||
1397 | if (!mesh_hdr->ttl) | |
1398 | /* illegal frame */ | |
1399 | return RX_DROP_MONITOR; | |
1400 | ||
1401 | if (compare_ether_addr(rx->dev->dev_addr, hdr->addr3) == 0) | |
1402 | return RX_CONTINUE; | |
1403 | ||
1404 | mesh_hdr->ttl--; | |
1405 | ||
1406 | if (rx->flags & IEEE80211_RX_RA_MATCH) { | |
1407 | if (!mesh_hdr->ttl) | |
472dbc45 | 1408 | IEEE80211_IFSTA_MESH_CTR_INC(&rx->sdata->u.mesh, |
e32f85f7 LCC |
1409 | dropped_frames_ttl); |
1410 | else { | |
1411 | struct ieee80211_hdr *fwd_hdr; | |
1412 | fwd_skb = skb_copy(skb, GFP_ATOMIC); | |
1413 | ||
1414 | if (!fwd_skb && net_ratelimit()) | |
1415 | printk(KERN_DEBUG "%s: failed to clone mesh frame\n", | |
1416 | rx->dev->name); | |
1417 | ||
1418 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
1419 | /* | |
1420 | * Save TA to addr1 to send TA a path error if a | |
1421 | * suitable next hop is not found | |
1422 | */ | |
1423 | memcpy(fwd_hdr->addr1, fwd_hdr->addr2, ETH_ALEN); | |
1424 | memcpy(fwd_hdr->addr2, rx->dev->dev_addr, ETH_ALEN); | |
1425 | fwd_skb->dev = rx->local->mdev; | |
1426 | fwd_skb->iif = rx->dev->ifindex; | |
1427 | dev_queue_xmit(fwd_skb); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | if (is_multicast_ether_addr(hdr->addr3) || | |
1432 | rx->dev->flags & IFF_PROMISC) | |
1433 | return RX_CONTINUE; | |
1434 | else | |
1435 | return RX_DROP_MONITOR; | |
1436 | } | |
1437 | ||
1438 | ||
49461622 | 1439 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1440 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf RR |
1441 | { |
1442 | struct net_device *dev = rx->dev; | |
358c8d9d HH |
1443 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
1444 | __le16 fc = hdr->frame_control; | |
ce3edf6d | 1445 | int err; |
76ee65bf | 1446 | |
358c8d9d | 1447 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 1448 | return RX_CONTINUE; |
76ee65bf | 1449 | |
358c8d9d | 1450 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 1451 | return RX_DROP_MONITOR; |
76ee65bf | 1452 | |
76ee65bf RR |
1453 | err = ieee80211_data_to_8023(rx); |
1454 | if (unlikely(err)) | |
e4c26add | 1455 | return RX_DROP_UNUSABLE; |
76ee65bf | 1456 | |
358c8d9d | 1457 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 1458 | return RX_DROP_MONITOR; |
ce3edf6d | 1459 | |
76ee65bf RR |
1460 | rx->skb->dev = dev; |
1461 | ||
1462 | dev->stats.rx_packets++; | |
1463 | dev->stats.rx_bytes += rx->skb->len; | |
1464 | ||
1465 | ieee80211_deliver_skb(rx); | |
571ecf67 | 1466 | |
9ae54c84 | 1467 | return RX_QUEUED; |
571ecf67 JB |
1468 | } |
1469 | ||
49461622 | 1470 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1471 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx) |
71364716 RR |
1472 | { |
1473 | struct ieee80211_local *local = rx->local; | |
1474 | struct ieee80211_hw *hw = &local->hw; | |
1475 | struct sk_buff *skb = rx->skb; | |
a7767f95 | 1476 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
1477 | struct tid_ampdu_rx *tid_agg_rx; |
1478 | u16 start_seq_num; | |
1479 | u16 tid; | |
1480 | ||
a7767f95 | 1481 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 1482 | return RX_CONTINUE; |
71364716 | 1483 | |
a7767f95 | 1484 | if (ieee80211_is_back_req(bar->frame_control)) { |
71364716 | 1485 | if (!rx->sta) |
9ae54c84 | 1486 | return RX_CONTINUE; |
71364716 | 1487 | tid = le16_to_cpu(bar->control) >> 12; |
cee24a3e RR |
1488 | if (rx->sta->ampdu_mlme.tid_state_rx[tid] |
1489 | != HT_AGG_STATE_OPERATIONAL) | |
9ae54c84 | 1490 | return RX_CONTINUE; |
cee24a3e | 1491 | tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid]; |
71364716 RR |
1492 | |
1493 | start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4; | |
1494 | ||
1495 | /* reset session timer */ | |
1496 | if (tid_agg_rx->timeout) { | |
1497 | unsigned long expires = | |
1498 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
1499 | mod_timer(&tid_agg_rx->session_timer, expires); | |
1500 | } | |
1501 | ||
1502 | /* manage reordering buffer according to requested */ | |
1503 | /* sequence number */ | |
1504 | rcu_read_lock(); | |
1505 | ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, | |
1506 | start_seq_num, 1); | |
1507 | rcu_read_unlock(); | |
e4c26add | 1508 | return RX_DROP_UNUSABLE; |
71364716 RR |
1509 | } |
1510 | ||
9ae54c84 | 1511 | return RX_CONTINUE; |
71364716 RR |
1512 | } |
1513 | ||
de1ede7a JB |
1514 | static ieee80211_rx_result debug_noinline |
1515 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
1516 | { | |
1517 | struct ieee80211_local *local = rx->local; | |
1518 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); | |
1519 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
1520 | int len = rx->skb->len; | |
1521 | ||
1522 | if (!ieee80211_is_action(mgmt->frame_control)) | |
1523 | return RX_CONTINUE; | |
1524 | ||
1525 | if (!rx->sta) | |
1526 | return RX_DROP_MONITOR; | |
1527 | ||
1528 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) | |
1529 | return RX_DROP_MONITOR; | |
1530 | ||
1531 | /* all categories we currently handle have action_code */ | |
1532 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
1533 | return RX_DROP_MONITOR; | |
1534 | ||
1535 | /* | |
1536 | * FIXME: revisit this, I'm sure we should handle most | |
1537 | * of these frames in other modes as well! | |
1538 | */ | |
1539 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && | |
1540 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
1541 | return RX_DROP_MONITOR; | |
1542 | ||
1543 | switch (mgmt->u.action.category) { | |
1544 | case WLAN_CATEGORY_BACK: | |
1545 | switch (mgmt->u.action.u.addba_req.action_code) { | |
1546 | case WLAN_ACTION_ADDBA_REQ: | |
1547 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
1548 | sizeof(mgmt->u.action.u.addba_req))) | |
1549 | return RX_DROP_MONITOR; | |
1550 | ieee80211_process_addba_request(local, rx->sta, mgmt, len); | |
1551 | break; | |
1552 | case WLAN_ACTION_ADDBA_RESP: | |
1553 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
1554 | sizeof(mgmt->u.action.u.addba_resp))) | |
1555 | return RX_DROP_MONITOR; | |
1556 | ieee80211_process_addba_resp(local, rx->sta, mgmt, len); | |
1557 | break; | |
1558 | case WLAN_ACTION_DELBA: | |
1559 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
1560 | sizeof(mgmt->u.action.u.delba))) | |
1561 | return RX_DROP_MONITOR; | |
1562 | ieee80211_process_delba(sdata, rx->sta, mgmt, len); | |
1563 | break; | |
1564 | } | |
39192c0b JB |
1565 | break; |
1566 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1567 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
1568 | return RX_DROP_MONITOR; | |
1569 | switch (mgmt->u.action.u.measurement.action_code) { | |
1570 | case WLAN_ACTION_SPCT_MSR_REQ: | |
1571 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
1572 | sizeof(mgmt->u.action.u.measurement))) | |
1573 | return RX_DROP_MONITOR; | |
1574 | ieee80211_process_measurement_req(sdata, mgmt, len); | |
1575 | break; | |
1576 | } | |
1577 | break; | |
1578 | default: | |
1579 | return RX_CONTINUE; | |
de1ede7a JB |
1580 | } |
1581 | ||
39192c0b JB |
1582 | rx->sta->rx_packets++; |
1583 | dev_kfree_skb(rx->skb); | |
1584 | return RX_QUEUED; | |
de1ede7a JB |
1585 | } |
1586 | ||
49461622 | 1587 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1588 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 1589 | { |
759ef3eb | 1590 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); |
571ecf67 | 1591 | |
5cf121c3 | 1592 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
e4c26add | 1593 | return RX_DROP_MONITOR; |
571ecf67 | 1594 | |
472dbc45 JB |
1595 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1596 | return ieee80211_mesh_rx_mgmt(sdata, rx->skb, rx->status); | |
1597 | ||
759ef3eb | 1598 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
472dbc45 | 1599 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
759ef3eb JB |
1600 | return RX_DROP_MONITOR; |
1601 | ||
1602 | if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) | |
e4c26add | 1603 | return RX_DROP_MONITOR; |
f9d540ee | 1604 | |
759ef3eb | 1605 | ieee80211_sta_rx_mgmt(sdata, rx->skb, rx->status); |
9ae54c84 | 1606 | return RX_QUEUED; |
571ecf67 JB |
1607 | } |
1608 | ||
571ecf67 JB |
1609 | static void ieee80211_rx_michael_mic_report(struct net_device *dev, |
1610 | struct ieee80211_hdr *hdr, | |
5cf121c3 | 1611 | struct ieee80211_rx_data *rx) |
571ecf67 | 1612 | { |
a7767f95 HH |
1613 | int keyidx; |
1614 | unsigned int hdrlen; | |
0795af57 JP |
1615 | DECLARE_MAC_BUF(mac); |
1616 | DECLARE_MAC_BUF(mac2); | |
571ecf67 | 1617 | |
a7767f95 | 1618 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
571ecf67 JB |
1619 | if (rx->skb->len >= hdrlen + 4) |
1620 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
1621 | else | |
1622 | keyidx = -1; | |
1623 | ||
8944b79f | 1624 | if (!rx->sta) { |
aa0daf0e JB |
1625 | /* |
1626 | * Some hardware seem to generate incorrect Michael MIC | |
1627 | * reports; ignore them to avoid triggering countermeasures. | |
1628 | */ | |
571ecf67 JB |
1629 | goto ignore; |
1630 | } | |
1631 | ||
a7767f95 | 1632 | if (!ieee80211_has_protected(hdr->frame_control)) |
571ecf67 | 1633 | goto ignore; |
571ecf67 | 1634 | |
51fb61e7 | 1635 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP && keyidx) { |
aa0daf0e JB |
1636 | /* |
1637 | * APs with pairwise keys should never receive Michael MIC | |
1638 | * errors for non-zero keyidx because these are reserved for | |
1639 | * group keys and only the AP is sending real multicast | |
1640 | * frames in the BSS. | |
1641 | */ | |
eb063c17 | 1642 | goto ignore; |
571ecf67 JB |
1643 | } |
1644 | ||
a7767f95 HH |
1645 | if (!ieee80211_is_data(hdr->frame_control) && |
1646 | !ieee80211_is_auth(hdr->frame_control)) | |
571ecf67 | 1647 | goto ignore; |
571ecf67 | 1648 | |
f698d856 | 1649 | mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr); |
571ecf67 JB |
1650 | ignore: |
1651 | dev_kfree_skb(rx->skb); | |
1652 | rx->skb = NULL; | |
1653 | } | |
1654 | ||
5cf121c3 JB |
1655 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
1656 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx) | |
3d30d949 MW |
1657 | { |
1658 | struct ieee80211_sub_if_data *sdata; | |
1659 | struct ieee80211_local *local = rx->local; | |
1660 | struct ieee80211_rtap_hdr { | |
1661 | struct ieee80211_radiotap_header hdr; | |
1662 | u8 flags; | |
1663 | u8 rate; | |
1664 | __le16 chan_freq; | |
1665 | __le16 chan_flags; | |
1666 | } __attribute__ ((packed)) *rthdr; | |
1667 | struct sk_buff *skb = rx->skb, *skb2; | |
1668 | struct net_device *prev_dev = NULL; | |
5cf121c3 | 1669 | struct ieee80211_rx_status *status = rx->status; |
3d30d949 | 1670 | |
5cf121c3 | 1671 | if (rx->flags & IEEE80211_RX_CMNTR_REPORTED) |
3d30d949 MW |
1672 | goto out_free_skb; |
1673 | ||
1674 | if (skb_headroom(skb) < sizeof(*rthdr) && | |
1675 | pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) | |
1676 | goto out_free_skb; | |
1677 | ||
1678 | rthdr = (void *)skb_push(skb, sizeof(*rthdr)); | |
1679 | memset(rthdr, 0, sizeof(*rthdr)); | |
1680 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
1681 | rthdr->hdr.it_present = | |
1682 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
1683 | (1 << IEEE80211_RADIOTAP_RATE) | | |
1684 | (1 << IEEE80211_RADIOTAP_CHANNEL)); | |
1685 | ||
5cf121c3 | 1686 | rthdr->rate = rx->rate->bitrate / 5; |
3d30d949 MW |
1687 | rthdr->chan_freq = cpu_to_le16(status->freq); |
1688 | ||
1689 | if (status->band == IEEE80211_BAND_5GHZ) | |
1690 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
1691 | IEEE80211_CHAN_5GHZ); | |
1692 | else | |
1693 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN | | |
1694 | IEEE80211_CHAN_2GHZ); | |
1695 | ||
1696 | skb_set_mac_header(skb, 0); | |
1697 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1698 | skb->pkt_type = PACKET_OTHERHOST; | |
1699 | skb->protocol = htons(ETH_P_802_2); | |
1700 | ||
1701 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
1702 | if (!netif_running(sdata->dev)) | |
1703 | continue; | |
1704 | ||
1705 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || | |
1706 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) | |
1707 | continue; | |
1708 | ||
1709 | if (prev_dev) { | |
1710 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1711 | if (skb2) { | |
1712 | skb2->dev = prev_dev; | |
1713 | netif_rx(skb2); | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | prev_dev = sdata->dev; | |
1718 | sdata->dev->stats.rx_packets++; | |
1719 | sdata->dev->stats.rx_bytes += skb->len; | |
1720 | } | |
1721 | ||
1722 | if (prev_dev) { | |
1723 | skb->dev = prev_dev; | |
1724 | netif_rx(skb); | |
1725 | skb = NULL; | |
1726 | } else | |
1727 | goto out_free_skb; | |
1728 | ||
5cf121c3 | 1729 | rx->flags |= IEEE80211_RX_CMNTR_REPORTED; |
3d30d949 MW |
1730 | return; |
1731 | ||
1732 | out_free_skb: | |
1733 | dev_kfree_skb(skb); | |
1734 | } | |
1735 | ||
571ecf67 | 1736 | |
8944b79f | 1737 | static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata, |
5cf121c3 | 1738 | struct ieee80211_rx_data *rx, |
8944b79f | 1739 | struct sk_buff *skb) |
58905290 | 1740 | { |
58905290 JB |
1741 | ieee80211_rx_result res = RX_DROP_MONITOR; |
1742 | ||
8944b79f JB |
1743 | rx->skb = skb; |
1744 | rx->sdata = sdata; | |
1745 | rx->dev = sdata->dev; | |
1746 | ||
e32f85f7 LCC |
1747 | #define CALL_RXH(rxh) \ |
1748 | do { \ | |
1749 | res = rxh(rx); \ | |
1750 | if (res != RX_CONTINUE) \ | |
1751 | goto rxh_done; \ | |
1752 | } while (0); | |
49461622 JB |
1753 | |
1754 | CALL_RXH(ieee80211_rx_h_passive_scan) | |
1755 | CALL_RXH(ieee80211_rx_h_check) | |
1756 | CALL_RXH(ieee80211_rx_h_decrypt) | |
1757 | CALL_RXH(ieee80211_rx_h_sta_process) | |
1758 | CALL_RXH(ieee80211_rx_h_defragment) | |
1759 | CALL_RXH(ieee80211_rx_h_ps_poll) | |
1760 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) | |
1761 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
1762 | CALL_RXH(ieee80211_rx_h_remove_qos_control) | |
1763 | CALL_RXH(ieee80211_rx_h_amsdu) | |
e32f85f7 LCC |
1764 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1765 | CALL_RXH(ieee80211_rx_h_mesh_fwding); | |
49461622 JB |
1766 | CALL_RXH(ieee80211_rx_h_data) |
1767 | CALL_RXH(ieee80211_rx_h_ctrl) | |
de1ede7a | 1768 | CALL_RXH(ieee80211_rx_h_action) |
49461622 JB |
1769 | CALL_RXH(ieee80211_rx_h_mgmt) |
1770 | ||
1771 | #undef CALL_RXH | |
1772 | ||
1773 | rxh_done: | |
58905290 JB |
1774 | switch (res) { |
1775 | case RX_DROP_MONITOR: | |
49461622 JB |
1776 | I802_DEBUG_INC(sdata->local->rx_handlers_drop); |
1777 | if (rx->sta) | |
1778 | rx->sta->rx_dropped++; | |
1779 | /* fall through */ | |
1780 | case RX_CONTINUE: | |
3d30d949 MW |
1781 | ieee80211_rx_cooked_monitor(rx); |
1782 | break; | |
58905290 | 1783 | case RX_DROP_UNUSABLE: |
49461622 JB |
1784 | I802_DEBUG_INC(sdata->local->rx_handlers_drop); |
1785 | if (rx->sta) | |
1786 | rx->sta->rx_dropped++; | |
58905290 JB |
1787 | dev_kfree_skb(rx->skb); |
1788 | break; | |
49461622 JB |
1789 | case RX_QUEUED: |
1790 | I802_DEBUG_INC(sdata->local->rx_handlers_queued); | |
1791 | break; | |
58905290 JB |
1792 | } |
1793 | } | |
1794 | ||
571ecf67 JB |
1795 | /* main receive path */ |
1796 | ||
23a24def | 1797 | static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata, |
5cf121c3 | 1798 | u8 *bssid, struct ieee80211_rx_data *rx, |
23a24def JB |
1799 | struct ieee80211_hdr *hdr) |
1800 | { | |
1801 | int multicast = is_multicast_ether_addr(hdr->addr1); | |
1802 | ||
51fb61e7 | 1803 | switch (sdata->vif.type) { |
23a24def JB |
1804 | case IEEE80211_IF_TYPE_STA: |
1805 | if (!bssid) | |
1806 | return 0; | |
1807 | if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { | |
5cf121c3 | 1808 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1809 | return 0; |
5cf121c3 | 1810 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1811 | } else if (!multicast && |
1812 | compare_ether_addr(sdata->dev->dev_addr, | |
1813 | hdr->addr1) != 0) { | |
4150c572 | 1814 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1815 | return 0; |
5cf121c3 | 1816 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1817 | } |
1818 | break; | |
1819 | case IEEE80211_IF_TYPE_IBSS: | |
1820 | if (!bssid) | |
1821 | return 0; | |
a7767f95 | 1822 | if (ieee80211_is_beacon(hdr->frame_control)) { |
9d9bf77d | 1823 | return 1; |
87291c02 | 1824 | } |
9d9bf77d | 1825 | else if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { |
5cf121c3 | 1826 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1827 | return 0; |
5cf121c3 | 1828 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1829 | } else if (!multicast && |
1830 | compare_ether_addr(sdata->dev->dev_addr, | |
1831 | hdr->addr1) != 0) { | |
4150c572 | 1832 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1833 | return 0; |
5cf121c3 | 1834 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 1835 | } else if (!rx->sta) |
f698d856 | 1836 | rx->sta = ieee80211_ibss_add_sta(sdata, rx->skb, |
87291c02 VK |
1837 | bssid, hdr->addr2, |
1838 | BIT(rx->status->rate_idx)); | |
23a24def | 1839 | break; |
6032f934 JB |
1840 | case IEEE80211_IF_TYPE_MESH_POINT: |
1841 | if (!multicast && | |
1842 | compare_ether_addr(sdata->dev->dev_addr, | |
1843 | hdr->addr1) != 0) { | |
1844 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
1845 | return 0; | |
1846 | ||
5cf121c3 | 1847 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
1848 | } |
1849 | break; | |
fb1c1cd6 | 1850 | case IEEE80211_IF_TYPE_VLAN: |
23a24def JB |
1851 | case IEEE80211_IF_TYPE_AP: |
1852 | if (!bssid) { | |
1853 | if (compare_ether_addr(sdata->dev->dev_addr, | |
1854 | hdr->addr1)) | |
1855 | return 0; | |
1856 | } else if (!ieee80211_bssid_match(bssid, | |
1857 | sdata->dev->dev_addr)) { | |
5cf121c3 | 1858 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1859 | return 0; |
5cf121c3 | 1860 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 1861 | } |
23a24def JB |
1862 | break; |
1863 | case IEEE80211_IF_TYPE_WDS: | |
a7767f95 | 1864 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
23a24def JB |
1865 | return 0; |
1866 | if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2)) | |
1867 | return 0; | |
1868 | break; | |
fb1c1cd6 JB |
1869 | case IEEE80211_IF_TYPE_MNTR: |
1870 | /* take everything */ | |
1871 | break; | |
a2897552 | 1872 | case IEEE80211_IF_TYPE_INVALID: |
fb1c1cd6 JB |
1873 | /* should never get here */ |
1874 | WARN_ON(1); | |
1875 | break; | |
23a24def JB |
1876 | } |
1877 | ||
1878 | return 1; | |
1879 | } | |
1880 | ||
571ecf67 | 1881 | /* |
6368e4b1 RR |
1882 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
1883 | * be called with rcu_read_lock protection. | |
571ecf67 | 1884 | */ |
71ebb4aa RR |
1885 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
1886 | struct sk_buff *skb, | |
1887 | struct ieee80211_rx_status *status, | |
8318d78a | 1888 | struct ieee80211_rate *rate) |
571ecf67 JB |
1889 | { |
1890 | struct ieee80211_local *local = hw_to_local(hw); | |
1891 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 1892 | struct ieee80211_hdr *hdr; |
5cf121c3 | 1893 | struct ieee80211_rx_data rx; |
6368e4b1 | 1894 | int prepares; |
8e6f0032 JB |
1895 | struct ieee80211_sub_if_data *prev = NULL; |
1896 | struct sk_buff *skb_new; | |
1897 | u8 *bssid; | |
571ecf67 | 1898 | |
358c8d9d | 1899 | hdr = (struct ieee80211_hdr *)skb->data; |
571ecf67 JB |
1900 | memset(&rx, 0, sizeof(rx)); |
1901 | rx.skb = skb; | |
1902 | rx.local = local; | |
1903 | ||
5cf121c3 | 1904 | rx.status = status; |
5cf121c3 | 1905 | rx.rate = rate; |
72abd81b | 1906 | |
358c8d9d | 1907 | if (ieee80211_is_data(hdr->frame_control) || ieee80211_is_mgmt(hdr->frame_control)) |
571ecf67 | 1908 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 1909 | |
8944b79f JB |
1910 | rx.sta = sta_info_get(local, hdr->addr2); |
1911 | if (rx.sta) { | |
d0709a65 JB |
1912 | rx.sdata = rx.sta->sdata; |
1913 | rx.dev = rx.sta->sdata->dev; | |
b2e7771e | 1914 | } |
571ecf67 | 1915 | |
571ecf67 | 1916 | if ((status->flag & RX_FLAG_MMIC_ERROR)) { |
8944b79f | 1917 | ieee80211_rx_michael_mic_report(local->mdev, hdr, &rx); |
d0709a65 | 1918 | return; |
571ecf67 JB |
1919 | } |
1920 | ||
c2b13452 | 1921 | if (unlikely(local->sw_scanning || local->hw_scanning)) |
5cf121c3 | 1922 | rx.flags |= IEEE80211_RX_IN_SCAN; |
571ecf67 | 1923 | |
38f3714d JB |
1924 | ieee80211_parse_qos(&rx); |
1925 | ieee80211_verify_ip_alignment(&rx); | |
1926 | ||
571ecf67 JB |
1927 | skb = rx.skb; |
1928 | ||
79010420 | 1929 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
2a8a9a88 JB |
1930 | if (!netif_running(sdata->dev)) |
1931 | continue; | |
1932 | ||
51fb61e7 | 1933 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) |
b2e7771e JB |
1934 | continue; |
1935 | ||
51fb61e7 | 1936 | bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); |
5cf121c3 | 1937 | rx.flags |= IEEE80211_RX_RA_MATCH; |
6368e4b1 | 1938 | prepares = prepare_for_handlers(sdata, bssid, &rx, hdr); |
23a24def | 1939 | |
6368e4b1 | 1940 | if (!prepares) |
23a24def | 1941 | continue; |
8e6f0032 | 1942 | |
340e11f3 JB |
1943 | /* |
1944 | * frame is destined for this interface, but if it's not | |
1945 | * also for the previous one we handle that after the | |
1946 | * loop to avoid copying the SKB once too much | |
1947 | */ | |
1948 | ||
1949 | if (!prev) { | |
1950 | prev = sdata; | |
1951 | continue; | |
8e6f0032 | 1952 | } |
340e11f3 JB |
1953 | |
1954 | /* | |
1955 | * frame was destined for the previous interface | |
1956 | * so invoke RX handlers for it | |
1957 | */ | |
1958 | ||
1959 | skb_new = skb_copy(skb, GFP_ATOMIC); | |
1960 | if (!skb_new) { | |
1961 | if (net_ratelimit()) | |
1962 | printk(KERN_DEBUG "%s: failed to copy " | |
a4278e18 | 1963 | "multicast frame for %s\n", |
dd1cd4c6 JB |
1964 | wiphy_name(local->hw.wiphy), |
1965 | prev->dev->name); | |
340e11f3 JB |
1966 | continue; |
1967 | } | |
8944b79f | 1968 | ieee80211_invoke_rx_handlers(prev, &rx, skb_new); |
8e6f0032 | 1969 | prev = sdata; |
571ecf67 | 1970 | } |
a4b7d7bd | 1971 | if (prev) |
8944b79f | 1972 | ieee80211_invoke_rx_handlers(prev, &rx, skb); |
a4b7d7bd | 1973 | else |
8e6f0032 | 1974 | dev_kfree_skb(skb); |
571ecf67 | 1975 | } |
6368e4b1 | 1976 | |
b580781e RR |
1977 | #define SEQ_MODULO 0x1000 |
1978 | #define SEQ_MASK 0xfff | |
1979 | ||
1980 | static inline int seq_less(u16 sq1, u16 sq2) | |
1981 | { | |
1982 | return (((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1)); | |
1983 | } | |
1984 | ||
1985 | static inline u16 seq_inc(u16 sq) | |
1986 | { | |
1987 | return ((sq + 1) & SEQ_MASK); | |
1988 | } | |
1989 | ||
1990 | static inline u16 seq_sub(u16 sq1, u16 sq2) | |
1991 | { | |
1992 | return ((sq1 - sq2) & SEQ_MASK); | |
1993 | } | |
1994 | ||
1995 | ||
71364716 RR |
1996 | /* |
1997 | * As it function blongs to Rx path it must be called with | |
1998 | * the proper rcu_read_lock protection for its flow. | |
1999 | */ | |
b580781e RR |
2000 | u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, |
2001 | struct tid_ampdu_rx *tid_agg_rx, | |
2002 | struct sk_buff *skb, u16 mpdu_seq_num, | |
2003 | int bar_req) | |
2004 | { | |
2005 | struct ieee80211_local *local = hw_to_local(hw); | |
2006 | struct ieee80211_rx_status status; | |
2007 | u16 head_seq_num, buf_size; | |
2008 | int index; | |
8318d78a JB |
2009 | struct ieee80211_supported_band *sband; |
2010 | struct ieee80211_rate *rate; | |
b580781e RR |
2011 | |
2012 | buf_size = tid_agg_rx->buf_size; | |
2013 | head_seq_num = tid_agg_rx->head_seq_num; | |
2014 | ||
2015 | /* frame with out of date sequence number */ | |
2016 | if (seq_less(mpdu_seq_num, head_seq_num)) { | |
2017 | dev_kfree_skb(skb); | |
2018 | return 1; | |
2019 | } | |
2020 | ||
2021 | /* if frame sequence number exceeds our buffering window size or | |
2022 | * block Ack Request arrived - release stored frames */ | |
2023 | if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) { | |
2024 | /* new head to the ordering buffer */ | |
2025 | if (bar_req) | |
2026 | head_seq_num = mpdu_seq_num; | |
2027 | else | |
2028 | head_seq_num = | |
2029 | seq_inc(seq_sub(mpdu_seq_num, buf_size)); | |
2030 | /* release stored frames up to new head to stack */ | |
2031 | while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) { | |
2032 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2033 | tid_agg_rx->ssn) | |
2034 | % tid_agg_rx->buf_size; | |
2035 | ||
2036 | if (tid_agg_rx->reorder_buf[index]) { | |
2037 | /* release the reordered frames to stack */ | |
2038 | memcpy(&status, | |
2039 | tid_agg_rx->reorder_buf[index]->cb, | |
2040 | sizeof(status)); | |
8318d78a JB |
2041 | sband = local->hw.wiphy->bands[status.band]; |
2042 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e RR |
2043 | __ieee80211_rx_handle_packet(hw, |
2044 | tid_agg_rx->reorder_buf[index], | |
9e72ebd6 | 2045 | &status, rate); |
b580781e RR |
2046 | tid_agg_rx->stored_mpdu_num--; |
2047 | tid_agg_rx->reorder_buf[index] = NULL; | |
2048 | } | |
2049 | tid_agg_rx->head_seq_num = | |
2050 | seq_inc(tid_agg_rx->head_seq_num); | |
2051 | } | |
2052 | if (bar_req) | |
2053 | return 1; | |
2054 | } | |
2055 | ||
2056 | /* now the new frame is always in the range of the reordering */ | |
2057 | /* buffer window */ | |
2058 | index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) | |
2059 | % tid_agg_rx->buf_size; | |
2060 | /* check if we already stored this frame */ | |
2061 | if (tid_agg_rx->reorder_buf[index]) { | |
2062 | dev_kfree_skb(skb); | |
2063 | return 1; | |
2064 | } | |
2065 | ||
2066 | /* if arrived mpdu is in the right order and nothing else stored */ | |
2067 | /* release it immediately */ | |
2068 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
2069 | tid_agg_rx->stored_mpdu_num == 0) { | |
2070 | tid_agg_rx->head_seq_num = | |
2071 | seq_inc(tid_agg_rx->head_seq_num); | |
2072 | return 0; | |
2073 | } | |
2074 | ||
2075 | /* put the frame in the reordering buffer */ | |
2076 | tid_agg_rx->reorder_buf[index] = skb; | |
2077 | tid_agg_rx->stored_mpdu_num++; | |
2078 | /* release the buffer until next missing frame */ | |
2079 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) | |
2080 | % tid_agg_rx->buf_size; | |
2081 | while (tid_agg_rx->reorder_buf[index]) { | |
2082 | /* release the reordered frame back to stack */ | |
2083 | memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, | |
2084 | sizeof(status)); | |
8318d78a JB |
2085 | sband = local->hw.wiphy->bands[status.band]; |
2086 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e | 2087 | __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index], |
9e72ebd6 | 2088 | &status, rate); |
b580781e RR |
2089 | tid_agg_rx->stored_mpdu_num--; |
2090 | tid_agg_rx->reorder_buf[index] = NULL; | |
2091 | tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); | |
2092 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2093 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
2094 | } | |
2095 | return 1; | |
2096 | } | |
2097 | ||
71ebb4aa RR |
2098 | static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local, |
2099 | struct sk_buff *skb) | |
b580781e RR |
2100 | { |
2101 | struct ieee80211_hw *hw = &local->hw; | |
2102 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2103 | struct sta_info *sta; | |
2104 | struct tid_ampdu_rx *tid_agg_rx; | |
87228f57 | 2105 | u16 sc; |
b580781e | 2106 | u16 mpdu_seq_num; |
182503ab | 2107 | u8 ret = 0; |
b580781e RR |
2108 | int tid; |
2109 | ||
2110 | sta = sta_info_get(local, hdr->addr2); | |
2111 | if (!sta) | |
2112 | return ret; | |
2113 | ||
b580781e RR |
2114 | /* filter the QoS data rx stream according to |
2115 | * STA/TID and check if this STA/TID is on aggregation */ | |
87228f57 | 2116 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
b580781e RR |
2117 | goto end_reorder; |
2118 | ||
238f74a2 | 2119 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
b580781e | 2120 | |
cee24a3e | 2121 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) |
b580781e RR |
2122 | goto end_reorder; |
2123 | ||
cee24a3e RR |
2124 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; |
2125 | ||
2560b6e2 EG |
2126 | /* qos null data frames are excluded */ |
2127 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
b580781e RR |
2128 | goto end_reorder; |
2129 | ||
2130 | /* new un-ordered ampdu frame - process it */ | |
2131 | ||
2132 | /* reset session timer */ | |
2133 | if (tid_agg_rx->timeout) { | |
2134 | unsigned long expires = | |
2135 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
2136 | mod_timer(&tid_agg_rx->session_timer, expires); | |
2137 | } | |
2138 | ||
2139 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
2140 | sc = le16_to_cpu(hdr->seq_ctrl); | |
2141 | if (sc & IEEE80211_SCTL_FRAG) { | |
f698d856 | 2142 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
b580781e RR |
2143 | tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP); |
2144 | ret = 1; | |
2145 | goto end_reorder; | |
2146 | } | |
2147 | ||
2148 | /* according to mpdu sequence number deal with reordering buffer */ | |
2149 | mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
2150 | ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, | |
2151 | mpdu_seq_num, 0); | |
d0709a65 | 2152 | end_reorder: |
b580781e RR |
2153 | return ret; |
2154 | } | |
2155 | ||
6368e4b1 RR |
2156 | /* |
2157 | * This is the receive path handler. It is called by a low level driver when an | |
2158 | * 802.11 MPDU is received from the hardware. | |
2159 | */ | |
2160 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2161 | struct ieee80211_rx_status *status) | |
2162 | { | |
2163 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
2164 | struct ieee80211_rate *rate = NULL; |
2165 | struct ieee80211_supported_band *sband; | |
2166 | ||
2167 | if (status->band < 0 || | |
13d8fd2d | 2168 | status->band >= IEEE80211_NUM_BANDS) { |
8318d78a JB |
2169 | WARN_ON(1); |
2170 | return; | |
2171 | } | |
2172 | ||
2173 | sband = local->hw.wiphy->bands[status->band]; | |
2174 | ||
2175 | if (!sband || | |
2176 | status->rate_idx < 0 || | |
2177 | status->rate_idx >= sband->n_bitrates) { | |
2178 | WARN_ON(1); | |
2179 | return; | |
2180 | } | |
2181 | ||
2182 | rate = &sband->bitrates[status->rate_idx]; | |
6368e4b1 RR |
2183 | |
2184 | /* | |
2185 | * key references and virtual interfaces are protected using RCU | |
2186 | * and this requires that we are in a read-side RCU section during | |
2187 | * receive processing | |
2188 | */ | |
2189 | rcu_read_lock(); | |
2190 | ||
2191 | /* | |
2192 | * Frames with failed FCS/PLCP checksum are not returned, | |
2193 | * all other frames are returned without radiotap header | |
2194 | * if it was previously present. | |
2195 | * Also, frames with less than 16 bytes are dropped. | |
2196 | */ | |
8318d78a | 2197 | skb = ieee80211_rx_monitor(local, skb, status, rate); |
6368e4b1 RR |
2198 | if (!skb) { |
2199 | rcu_read_unlock(); | |
2200 | return; | |
2201 | } | |
2202 | ||
b580781e | 2203 | if (!ieee80211_rx_reorder_ampdu(local, skb)) |
9e72ebd6 | 2204 | __ieee80211_rx_handle_packet(hw, skb, status, rate); |
6368e4b1 RR |
2205 | |
2206 | rcu_read_unlock(); | |
2207 | } | |
571ecf67 JB |
2208 | EXPORT_SYMBOL(__ieee80211_rx); |
2209 | ||
2210 | /* This is a version of the rx handler that can be called from hard irq | |
2211 | * context. Post the skb on the queue and schedule the tasklet */ | |
2212 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2213 | struct ieee80211_rx_status *status) | |
2214 | { | |
2215 | struct ieee80211_local *local = hw_to_local(hw); | |
2216 | ||
2217 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
2218 | ||
2219 | skb->dev = local->mdev; | |
2220 | /* copy status into skb->cb for use by tasklet */ | |
2221 | memcpy(skb->cb, status, sizeof(*status)); | |
2222 | skb->pkt_type = IEEE80211_RX_MSG; | |
2223 | skb_queue_tail(&local->skb_queue, skb); | |
2224 | tasklet_schedule(&local->tasklet); | |
2225 | } | |
2226 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |