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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 | { | |
64 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
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; | |
98f0b0a3 RR |
70 | if (((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FTYPE)) == |
71 | cpu_to_le16(IEEE80211_FTYPE_CTL)) && | |
72 | ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE)) != | |
71364716 RR |
73 | cpu_to_le16(IEEE80211_STYPE_PSPOLL)) && |
74 | ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE)) != | |
75 | cpu_to_le16(IEEE80211_STYPE_BACK_REQ))) | |
b2e7771e JB |
76 | return 1; |
77 | return 0; | |
78 | } | |
79 | ||
601ae7f2 BR |
80 | static int |
81 | ieee80211_rx_radiotap_len(struct ieee80211_local *local, | |
82 | struct ieee80211_rx_status *status) | |
83 | { | |
84 | int len; | |
85 | ||
86 | /* always present fields */ | |
87 | len = sizeof(struct ieee80211_radiotap_header) + 9; | |
88 | ||
89 | if (status->flag & RX_FLAG_TSFT) | |
90 | len += 8; | |
91 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DB || | |
92 | local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
93 | len += 1; | |
94 | if (local->hw.flags & IEEE80211_HW_NOISE_DBM) | |
95 | len += 1; | |
96 | ||
97 | if (len & 1) /* padding for RX_FLAGS if necessary */ | |
98 | len++; | |
99 | ||
100 | /* make sure radiotap starts at a naturally aligned address */ | |
101 | if (len % 8) | |
102 | len = roundup(len, 8); | |
103 | ||
104 | return len; | |
105 | } | |
106 | ||
107 | /** | |
108 | * ieee80211_add_rx_radiotap_header - add radiotap header | |
109 | * | |
110 | * add a radiotap header containing all the fields which the hardware provided. | |
111 | */ | |
112 | static void | |
113 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
114 | struct sk_buff *skb, | |
115 | struct ieee80211_rx_status *status, | |
116 | struct ieee80211_rate *rate, | |
117 | int rtap_len) | |
118 | { | |
119 | struct ieee80211_radiotap_header *rthdr; | |
120 | unsigned char *pos; | |
121 | ||
122 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
123 | memset(rthdr, 0, rtap_len); | |
124 | ||
125 | /* radiotap header, set always present flags */ | |
126 | rthdr->it_present = | |
127 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
128 | (1 << IEEE80211_RADIOTAP_RATE) | | |
129 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
130 | (1 << IEEE80211_RADIOTAP_ANTENNA) | | |
131 | (1 << IEEE80211_RADIOTAP_RX_FLAGS)); | |
132 | rthdr->it_len = cpu_to_le16(rtap_len); | |
133 | ||
134 | pos = (unsigned char *)(rthdr+1); | |
135 | ||
136 | /* the order of the following fields is important */ | |
137 | ||
138 | /* IEEE80211_RADIOTAP_TSFT */ | |
139 | if (status->flag & RX_FLAG_TSFT) { | |
140 | *(__le64 *)pos = cpu_to_le64(status->mactime); | |
141 | rthdr->it_present |= | |
142 | cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); | |
143 | pos += 8; | |
144 | } | |
145 | ||
146 | /* IEEE80211_RADIOTAP_FLAGS */ | |
147 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
148 | *pos |= IEEE80211_RADIOTAP_F_FCS; | |
149 | pos++; | |
150 | ||
151 | /* IEEE80211_RADIOTAP_RATE */ | |
152 | *pos = rate->bitrate / 5; | |
153 | pos++; | |
154 | ||
155 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
156 | *(__le16 *)pos = cpu_to_le16(status->freq); | |
157 | pos += 2; | |
158 | if (status->band == IEEE80211_BAND_5GHZ) | |
159 | *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
160 | IEEE80211_CHAN_5GHZ); | |
161 | else | |
162 | *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_DYN | | |
163 | IEEE80211_CHAN_2GHZ); | |
164 | pos += 2; | |
165 | ||
166 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
167 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { | |
168 | *pos = status->signal; | |
169 | rthdr->it_present |= | |
170 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
171 | pos++; | |
172 | } | |
173 | ||
174 | /* IEEE80211_RADIOTAP_DBM_ANTNOISE */ | |
175 | if (local->hw.flags & IEEE80211_HW_NOISE_DBM) { | |
176 | *pos = status->noise; | |
177 | rthdr->it_present |= | |
178 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE); | |
179 | pos++; | |
180 | } | |
181 | ||
182 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ | |
183 | ||
184 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
185 | *pos = status->antenna; | |
186 | pos++; | |
187 | ||
188 | /* IEEE80211_RADIOTAP_DB_ANTSIGNAL */ | |
189 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DB) { | |
190 | *pos = status->signal; | |
191 | rthdr->it_present |= | |
192 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL); | |
193 | pos++; | |
194 | } | |
195 | ||
196 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ | |
197 | ||
198 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
199 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
200 | if ((pos - (unsigned char *)rthdr) & 1) | |
201 | pos++; | |
202 | /* FIXME: when radiotap gets a 'bad PLCP' flag use it here */ | |
203 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) | |
204 | *(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS); | |
205 | pos += 2; | |
206 | } | |
207 | ||
b2e7771e JB |
208 | /* |
209 | * This function copies a received frame to all monitor interfaces and | |
210 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
211 | * radiotap header the driver might have added. | |
212 | */ | |
213 | static struct sk_buff * | |
214 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a JB |
215 | struct ieee80211_rx_status *status, |
216 | struct ieee80211_rate *rate) | |
b2e7771e JB |
217 | { |
218 | struct ieee80211_sub_if_data *sdata; | |
b2e7771e | 219 | int needed_headroom = 0; |
b2e7771e JB |
220 | struct sk_buff *skb, *skb2; |
221 | struct net_device *prev_dev = NULL; | |
222 | int present_fcs_len = 0; | |
223 | int rtap_len = 0; | |
224 | ||
225 | /* | |
226 | * First, we may need to make a copy of the skb because | |
227 | * (1) we need to modify it for radiotap (if not present), and | |
228 | * (2) the other RX handlers will modify the skb we got. | |
229 | * | |
230 | * We don't need to, of course, if we aren't going to return | |
231 | * the SKB because it has a bad FCS/PLCP checksum. | |
232 | */ | |
233 | if (status->flag & RX_FLAG_RADIOTAP) | |
234 | rtap_len = ieee80211_get_radiotap_len(origskb->data); | |
235 | else | |
601ae7f2 BR |
236 | /* room for the radiotap header based on driver features */ |
237 | needed_headroom = ieee80211_rx_radiotap_len(local, status); | |
b2e7771e JB |
238 | |
239 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
240 | present_fcs_len = FCS_LEN; | |
241 | ||
242 | if (!local->monitors) { | |
243 | if (should_drop_frame(status, origskb, present_fcs_len, | |
244 | rtap_len)) { | |
245 | dev_kfree_skb(origskb); | |
246 | return NULL; | |
247 | } | |
248 | ||
249 | return remove_monitor_info(local, origskb, rtap_len); | |
250 | } | |
251 | ||
252 | if (should_drop_frame(status, origskb, present_fcs_len, rtap_len)) { | |
253 | /* only need to expand headroom if necessary */ | |
254 | skb = origskb; | |
255 | origskb = NULL; | |
256 | ||
257 | /* | |
258 | * This shouldn't trigger often because most devices have an | |
259 | * RX header they pull before we get here, and that should | |
260 | * be big enough for our radiotap information. We should | |
261 | * probably export the length to drivers so that we can have | |
262 | * them allocate enough headroom to start with. | |
263 | */ | |
264 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 265 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
266 | dev_kfree_skb(skb); |
267 | return NULL; | |
268 | } | |
269 | } else { | |
270 | /* | |
271 | * Need to make a copy and possibly remove radiotap header | |
272 | * and FCS from the original. | |
273 | */ | |
274 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
275 | ||
276 | origskb = remove_monitor_info(local, origskb, rtap_len); | |
277 | ||
278 | if (!skb) | |
279 | return origskb; | |
280 | } | |
281 | ||
282 | /* if necessary, prepend radiotap information */ | |
601ae7f2 BR |
283 | if (!(status->flag & RX_FLAG_RADIOTAP)) |
284 | ieee80211_add_rx_radiotap_header(local, skb, status, rate, | |
285 | needed_headroom); | |
b2e7771e | 286 | |
ce3edf6d | 287 | skb_reset_mac_header(skb); |
b2e7771e JB |
288 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
289 | skb->pkt_type = PACKET_OTHERHOST; | |
290 | skb->protocol = htons(ETH_P_802_2); | |
291 | ||
292 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
293 | if (!netif_running(sdata->dev)) | |
294 | continue; | |
295 | ||
51fb61e7 | 296 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR) |
b2e7771e JB |
297 | continue; |
298 | ||
3d30d949 MW |
299 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
300 | continue; | |
301 | ||
b2e7771e JB |
302 | if (prev_dev) { |
303 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
304 | if (skb2) { | |
305 | skb2->dev = prev_dev; | |
306 | netif_rx(skb2); | |
307 | } | |
308 | } | |
309 | ||
310 | prev_dev = sdata->dev; | |
311 | sdata->dev->stats.rx_packets++; | |
312 | sdata->dev->stats.rx_bytes += skb->len; | |
313 | } | |
314 | ||
315 | if (prev_dev) { | |
316 | skb->dev = prev_dev; | |
317 | netif_rx(skb); | |
318 | } else | |
319 | dev_kfree_skb(skb); | |
320 | ||
321 | return origskb; | |
322 | } | |
323 | ||
324 | ||
5cf121c3 | 325 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d JB |
326 | { |
327 | u8 *data = rx->skb->data; | |
328 | int tid; | |
329 | ||
330 | /* does the frame have a qos control field? */ | |
331 | if (WLAN_FC_IS_QOS_DATA(rx->fc)) { | |
332 | u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN; | |
333 | /* frame has qos control */ | |
334 | tid = qc[0] & QOS_CONTROL_TID_MASK; | |
fd4c7f2f | 335 | if (qc[0] & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) |
5cf121c3 | 336 | rx->flags |= IEEE80211_RX_AMSDU; |
fd4c7f2f | 337 | else |
5cf121c3 | 338 | rx->flags &= ~IEEE80211_RX_AMSDU; |
6e0d114d JB |
339 | } else { |
340 | if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) { | |
341 | /* Separate TID for management frames */ | |
342 | tid = NUM_RX_DATA_QUEUES - 1; | |
343 | } else { | |
344 | /* no qos control present */ | |
345 | tid = 0; /* 802.1d - Best Effort */ | |
346 | } | |
347 | } | |
52865dfd | 348 | |
5cf121c3 | 349 | rx->queue = tid; |
6e0d114d JB |
350 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
351 | * For now, set skb->priority to 0 for other cases. */ | |
352 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 353 | } |
6e0d114d | 354 | |
5cf121c3 | 355 | static void ieee80211_verify_ip_alignment(struct ieee80211_rx_data *rx) |
38f3714d JB |
356 | { |
357 | #ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT | |
358 | int hdrlen; | |
359 | ||
360 | if (!WLAN_FC_DATA_PRESENT(rx->fc)) | |
361 | return; | |
362 | ||
363 | /* | |
364 | * Drivers are required to align the payload data in a way that | |
365 | * guarantees that the contained IP header is aligned to a four- | |
366 | * byte boundary. In the case of regular frames, this simply means | |
367 | * aligning the payload to a four-byte boundary (because either | |
368 | * the IP header is directly contained, or IV/RFC1042 headers that | |
369 | * have a length divisible by four are in front of it. | |
370 | * | |
371 | * With A-MSDU frames, however, the payload data address must | |
372 | * yield two modulo four because there are 14-byte 802.3 headers | |
373 | * within the A-MSDU frames that push the IP header further back | |
374 | * to a multiple of four again. Thankfully, the specs were sane | |
375 | * enough this time around to require padding each A-MSDU subframe | |
376 | * to a length that is a multiple of four. | |
377 | * | |
378 | * Padding like atheros hardware adds which is inbetween the 802.11 | |
379 | * header and the payload is not supported, the driver is required | |
380 | * to move the 802.11 header further back in that case. | |
381 | */ | |
382 | hdrlen = ieee80211_get_hdrlen(rx->fc); | |
5cf121c3 | 383 | if (rx->flags & IEEE80211_RX_AMSDU) |
38f3714d JB |
384 | hdrlen += ETH_HLEN; |
385 | WARN_ON_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3); | |
386 | #endif | |
6e0d114d JB |
387 | } |
388 | ||
6368e4b1 | 389 | |
571ecf67 JB |
390 | /* rx handlers */ |
391 | ||
9ae54c84 | 392 | static ieee80211_rx_result |
5cf121c3 | 393 | ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) |
571ecf67 JB |
394 | { |
395 | struct ieee80211_local *local = rx->local; | |
396 | struct sk_buff *skb = rx->skb; | |
397 | ||
ece8eddd | 398 | if (unlikely(local->sta_hw_scanning)) |
5cf121c3 | 399 | return ieee80211_sta_rx_scan(rx->dev, skb, rx->status); |
ece8eddd ZY |
400 | |
401 | if (unlikely(local->sta_sw_scanning)) { | |
402 | /* drop all the other packets during a software scan anyway */ | |
5cf121c3 | 403 | if (ieee80211_sta_rx_scan(rx->dev, skb, rx->status) |
9ae54c84 | 404 | != RX_QUEUED) |
ece8eddd | 405 | dev_kfree_skb(skb); |
9ae54c84 | 406 | return RX_QUEUED; |
571ecf67 JB |
407 | } |
408 | ||
5cf121c3 | 409 | if (unlikely(rx->flags & IEEE80211_RX_IN_SCAN)) { |
571ecf67 JB |
410 | /* scanning finished during invoking of handlers */ |
411 | I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); | |
e4c26add | 412 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
413 | } |
414 | ||
9ae54c84 | 415 | return RX_CONTINUE; |
571ecf67 JB |
416 | } |
417 | ||
33b64eb2 | 418 | static ieee80211_rx_result |
5cf121c3 | 419 | ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 LCC |
420 | { |
421 | int hdrlen = ieee80211_get_hdrlen(rx->fc); | |
422 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
d6d1a5a7 JB |
423 | |
424 | #define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l)) | |
425 | ||
33b64eb2 LCC |
426 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) { |
427 | if (!((rx->fc & IEEE80211_FCTL_FROMDS) && | |
428 | (rx->fc & IEEE80211_FCTL_TODS))) | |
429 | return RX_DROP_MONITOR; | |
430 | if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0) | |
431 | return RX_DROP_MONITOR; | |
432 | } | |
433 | ||
434 | /* If there is not an established peer link and this is not a peer link | |
435 | * establisment frame, beacon or probe, drop the frame. | |
436 | */ | |
437 | ||
b4e08ea1 | 438 | if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) { |
33b64eb2 | 439 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 440 | |
33b64eb2 LCC |
441 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) |
442 | return RX_DROP_MONITOR; | |
443 | ||
444 | switch (rx->fc & IEEE80211_FCTL_STYPE) { | |
445 | case IEEE80211_STYPE_ACTION: | |
446 | mgmt = (struct ieee80211_mgmt *)hdr; | |
447 | if (mgmt->u.action.category != PLINK_CATEGORY) | |
448 | return RX_DROP_MONITOR; | |
449 | /* fall through on else */ | |
450 | case IEEE80211_STYPE_PROBE_REQ: | |
451 | case IEEE80211_STYPE_PROBE_RESP: | |
452 | case IEEE80211_STYPE_BEACON: | |
453 | return RX_CONTINUE; | |
454 | break; | |
455 | default: | |
456 | return RX_DROP_MONITOR; | |
457 | } | |
458 | ||
459 | } else if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
966a5428 | 460 | is_multicast_ether_addr(hdr->addr1) && |
33b64eb2 LCC |
461 | mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->dev)) |
462 | return RX_DROP_MONITOR; | |
902acc78 | 463 | #undef msh_h_get |
d6d1a5a7 | 464 | |
902acc78 JB |
465 | return RX_CONTINUE; |
466 | } | |
33b64eb2 LCC |
467 | |
468 | ||
9ae54c84 | 469 | static ieee80211_rx_result |
5cf121c3 | 470 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 JB |
471 | { |
472 | struct ieee80211_hdr *hdr; | |
33b64eb2 | 473 | |
571ecf67 JB |
474 | hdr = (struct ieee80211_hdr *) rx->skb->data; |
475 | ||
476 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
477 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
478 | if (unlikely(rx->fc & IEEE80211_FCTL_RETRY && | |
5cf121c3 | 479 | rx->sta->last_seq_ctrl[rx->queue] == |
571ecf67 | 480 | hdr->seq_ctrl)) { |
5cf121c3 | 481 | if (rx->flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
482 | rx->local->dot11FrameDuplicateCount++; |
483 | rx->sta->num_duplicates++; | |
484 | } | |
e4c26add | 485 | return RX_DROP_MONITOR; |
571ecf67 | 486 | } else |
5cf121c3 | 487 | rx->sta->last_seq_ctrl[rx->queue] = hdr->seq_ctrl; |
571ecf67 JB |
488 | } |
489 | ||
571ecf67 JB |
490 | if (unlikely(rx->skb->len < 16)) { |
491 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 492 | return RX_DROP_MONITOR; |
571ecf67 JB |
493 | } |
494 | ||
571ecf67 JB |
495 | /* Drop disallowed frame classes based on STA auth/assoc state; |
496 | * IEEE 802.11, Chap 5.5. | |
497 | * | |
498 | * 80211.o does filtering only based on association state, i.e., it | |
499 | * drops Class 3 frames from not associated stations. hostapd sends | |
500 | * deauth/disassoc frames when needed. In addition, hostapd is | |
501 | * responsible for filtering on both auth and assoc states. | |
502 | */ | |
33b64eb2 | 503 | |
902acc78 | 504 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 505 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 506 | |
571ecf67 JB |
507 | if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA || |
508 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL && | |
509 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) && | |
51fb61e7 | 510 | rx->sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
07346f81 | 511 | (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) { |
571ecf67 JB |
512 | if ((!(rx->fc & IEEE80211_FCTL_FROMDS) && |
513 | !(rx->fc & IEEE80211_FCTL_TODS) && | |
514 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) | |
5cf121c3 | 515 | || !(rx->flags & IEEE80211_RX_RA_MATCH)) { |
571ecf67 JB |
516 | /* Drop IBSS frames and frames for other hosts |
517 | * silently. */ | |
e4c26add | 518 | return RX_DROP_MONITOR; |
571ecf67 JB |
519 | } |
520 | ||
e4c26add | 521 | return RX_DROP_MONITOR; |
571ecf67 JB |
522 | } |
523 | ||
9ae54c84 | 524 | return RX_CONTINUE; |
570bd537 JB |
525 | } |
526 | ||
527 | ||
9ae54c84 | 528 | static ieee80211_rx_result |
5cf121c3 | 529 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
570bd537 JB |
530 | { |
531 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3017b80b JB |
532 | int keyidx; |
533 | int hdrlen; | |
e4c26add | 534 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
d4e46a3d | 535 | struct ieee80211_key *stakey = NULL; |
570bd537 | 536 | |
3017b80b JB |
537 | /* |
538 | * Key selection 101 | |
539 | * | |
540 | * There are three types of keys: | |
541 | * - GTK (group keys) | |
542 | * - PTK (pairwise keys) | |
543 | * - STK (station-to-station pairwise keys) | |
544 | * | |
545 | * When selecting a key, we have to distinguish between multicast | |
546 | * (including broadcast) and unicast frames, the latter can only | |
547 | * use PTKs and STKs while the former always use GTKs. Unless, of | |
548 | * course, actual WEP keys ("pre-RSNA") are used, then unicast | |
549 | * frames can also use key indizes like GTKs. Hence, if we don't | |
550 | * have a PTK/STK we check the key index for a WEP key. | |
551 | * | |
8dc06a1c JB |
552 | * Note that in a regular BSS, multicast frames are sent by the |
553 | * AP only, associated stations unicast the frame to the AP first | |
554 | * which then multicasts it on their behalf. | |
555 | * | |
3017b80b JB |
556 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
557 | * with each station, that is something we don't currently handle. | |
8dc06a1c JB |
558 | * The spec seems to expect that one negotiates the same key with |
559 | * every station but there's no such requirement; VLANs could be | |
560 | * possible. | |
3017b80b JB |
561 | */ |
562 | ||
563 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) | |
9ae54c84 | 564 | return RX_CONTINUE; |
571ecf67 | 565 | |
3017b80b | 566 | /* |
1990af8d | 567 | * No point in finding a key and decrypting if the frame is neither |
3017b80b JB |
568 | * addressed to us nor a multicast frame. |
569 | */ | |
5cf121c3 | 570 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 571 | return RX_CONTINUE; |
3017b80b | 572 | |
d4e46a3d JB |
573 | if (rx->sta) |
574 | stakey = rcu_dereference(rx->sta->key); | |
575 | ||
576 | if (!is_multicast_ether_addr(hdr->addr1) && stakey) { | |
577 | rx->key = stakey; | |
571ecf67 | 578 | } else { |
3017b80b JB |
579 | /* |
580 | * The device doesn't give us the IV so we won't be | |
581 | * able to look up the key. That's ok though, we | |
582 | * don't need to decrypt the frame, we just won't | |
583 | * be able to keep statistics accurate. | |
584 | * Except for key threshold notifications, should | |
585 | * we somehow allow the driver to tell us which key | |
586 | * the hardware used if this flag is set? | |
587 | */ | |
5cf121c3 JB |
588 | if ((rx->status->flag & RX_FLAG_DECRYPTED) && |
589 | (rx->status->flag & RX_FLAG_IV_STRIPPED)) | |
9ae54c84 | 590 | return RX_CONTINUE; |
3017b80b JB |
591 | |
592 | hdrlen = ieee80211_get_hdrlen(rx->fc); | |
593 | ||
594 | if (rx->skb->len < 8 + hdrlen) | |
e4c26add | 595 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
3017b80b JB |
596 | |
597 | /* | |
598 | * no need to call ieee80211_wep_get_keyidx, | |
599 | * it verifies a bunch of things we've done already | |
600 | */ | |
601 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
602 | ||
d4e46a3d | 603 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
3017b80b JB |
604 | |
605 | /* | |
606 | * RSNA-protected unicast frames should always be sent with | |
607 | * pairwise or station-to-station keys, but for WEP we allow | |
608 | * using a key index as well. | |
609 | */ | |
8f20fc24 | 610 | if (rx->key && rx->key->conf.alg != ALG_WEP && |
3017b80b JB |
611 | !is_multicast_ether_addr(hdr->addr1)) |
612 | rx->key = NULL; | |
571ecf67 JB |
613 | } |
614 | ||
3017b80b | 615 | if (rx->key) { |
571ecf67 | 616 | rx->key->tx_rx_count++; |
011bfcc4 | 617 | /* TODO: add threshold stuff again */ |
1990af8d | 618 | } else { |
7f3ad894 | 619 | #ifdef CONFIG_MAC80211_DEBUG |
70f08765 JB |
620 | if (net_ratelimit()) |
621 | printk(KERN_DEBUG "%s: RX protected frame," | |
622 | " but have no key\n", rx->dev->name); | |
7f3ad894 | 623 | #endif /* CONFIG_MAC80211_DEBUG */ |
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 && | |
629 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) && | |
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 JB |
659 | |
660 | if (sdata->bss) | |
661 | atomic_inc(&sdata->bss->num_sta_ps); | |
07346f81 | 662 | set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL); |
571ecf67 | 663 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
664 | printk(KERN_DEBUG "%s: STA %s aid %d enters power save mode\n", |
665 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 JB |
666 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
667 | } | |
668 | ||
669 | static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) | |
670 | { | |
671 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
672 | struct sk_buff *skb; | |
673 | int sent = 0; | |
674 | struct ieee80211_sub_if_data *sdata; | |
e039fa4a | 675 | struct ieee80211_tx_info *info; |
0795af57 | 676 | DECLARE_MAC_BUF(mac); |
571ecf67 | 677 | |
d0709a65 | 678 | sdata = sta->sdata; |
004c872e | 679 | |
571ecf67 JB |
680 | if (sdata->bss) |
681 | atomic_dec(&sdata->bss->num_sta_ps); | |
004c872e | 682 | |
07346f81 | 683 | clear_sta_flags(sta, WLAN_STA_PS | WLAN_STA_PSPOLL); |
004c872e JB |
684 | |
685 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
686 | sta_info_clear_tim_bit(sta); | |
687 | ||
571ecf67 | 688 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
689 | printk(KERN_DEBUG "%s: STA %s aid %d exits power save mode\n", |
690 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 | 691 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
004c872e | 692 | |
571ecf67 JB |
693 | /* Send all buffered frames to the station */ |
694 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
e039fa4a | 695 | info = IEEE80211_SKB_CB(skb); |
571ecf67 | 696 | sent++; |
e039fa4a | 697 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
571ecf67 JB |
698 | dev_queue_xmit(skb); |
699 | } | |
700 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
e039fa4a | 701 | info = IEEE80211_SKB_CB(skb); |
571ecf67 JB |
702 | local->total_ps_buffered--; |
703 | sent++; | |
704 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 | 705 | printk(KERN_DEBUG "%s: STA %s aid %d send PS frame " |
571ecf67 | 706 | "since STA not sleeping anymore\n", dev->name, |
0795af57 | 707 | print_mac(mac, sta->addr), sta->aid); |
571ecf67 | 708 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
e039fa4a | 709 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
571ecf67 JB |
710 | dev_queue_xmit(skb); |
711 | } | |
712 | ||
713 | return sent; | |
714 | } | |
715 | ||
9ae54c84 | 716 | static ieee80211_rx_result |
5cf121c3 | 717 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
718 | { |
719 | struct sta_info *sta = rx->sta; | |
720 | struct net_device *dev = rx->dev; | |
721 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
722 | ||
723 | if (!sta) | |
9ae54c84 | 724 | return RX_CONTINUE; |
571ecf67 JB |
725 | |
726 | /* Update last_rx only for IBSS packets which are for the current | |
727 | * BSSID to avoid keeping the current IBSS network alive in cases where | |
728 | * other STAs are using different BSSID. */ | |
51fb61e7 | 729 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
71364716 RR |
730 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
731 | IEEE80211_IF_TYPE_IBSS); | |
571ecf67 JB |
732 | if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) |
733 | sta->last_rx = jiffies; | |
734 | } else | |
735 | if (!is_multicast_ether_addr(hdr->addr1) || | |
51fb61e7 | 736 | rx->sdata->vif.type == IEEE80211_IF_TYPE_STA) { |
571ecf67 JB |
737 | /* Update last_rx only for unicast frames in order to prevent |
738 | * the Probe Request frames (the only broadcast frames from a | |
739 | * STA in infrastructure mode) from keeping a connection alive. | |
33b64eb2 LCC |
740 | * Mesh beacons will update last_rx when if they are found to |
741 | * match the current local configuration when processed. | |
571ecf67 JB |
742 | */ |
743 | sta->last_rx = jiffies; | |
744 | } | |
745 | ||
5cf121c3 | 746 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 747 | return RX_CONTINUE; |
571ecf67 JB |
748 | |
749 | sta->rx_fragments++; | |
750 | sta->rx_bytes += rx->skb->len; | |
5cf121c3 | 751 | sta->last_signal = rx->status->signal; |
566bfe5a | 752 | sta->last_qual = rx->status->qual; |
5cf121c3 | 753 | sta->last_noise = rx->status->noise; |
571ecf67 JB |
754 | |
755 | if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) { | |
756 | /* Change STA power saving mode only in the end of a frame | |
757 | * exchange sequence */ | |
07346f81 JB |
758 | if (test_sta_flags(sta, WLAN_STA_PS) && |
759 | !(rx->fc & IEEE80211_FCTL_PM)) | |
5cf121c3 | 760 | rx->sent_ps_buffered += ap_sta_ps_end(dev, sta); |
07346f81 | 761 | else if (!test_sta_flags(sta, WLAN_STA_PS) && |
571ecf67 JB |
762 | (rx->fc & IEEE80211_FCTL_PM)) |
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. */ | |
768 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
769 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) { | |
770 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); | |
771 | /* Update counter and free packet here to avoid counting this | |
772 | * as a dropped packed. */ | |
773 | sta->rx_packets++; | |
774 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 775 | return RX_QUEUED; |
571ecf67 JB |
776 | } |
777 | ||
9ae54c84 | 778 | return RX_CONTINUE; |
571ecf67 JB |
779 | } /* ieee80211_rx_h_sta_process */ |
780 | ||
571ecf67 JB |
781 | static inline struct ieee80211_fragment_entry * |
782 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
783 | unsigned int frag, unsigned int seq, int rx_queue, | |
784 | struct sk_buff **skb) | |
785 | { | |
786 | struct ieee80211_fragment_entry *entry; | |
787 | int idx; | |
788 | ||
789 | idx = sdata->fragment_next; | |
790 | entry = &sdata->fragments[sdata->fragment_next++]; | |
791 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
792 | sdata->fragment_next = 0; | |
793 | ||
794 | if (!skb_queue_empty(&entry->skb_list)) { | |
795 | #ifdef CONFIG_MAC80211_DEBUG | |
796 | struct ieee80211_hdr *hdr = | |
797 | (struct ieee80211_hdr *) entry->skb_list.next->data; | |
0795af57 JP |
798 | DECLARE_MAC_BUF(mac); |
799 | DECLARE_MAC_BUF(mac2); | |
571ecf67 JB |
800 | printk(KERN_DEBUG "%s: RX reassembly removed oldest " |
801 | "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " | |
0795af57 | 802 | "addr1=%s addr2=%s\n", |
571ecf67 JB |
803 | sdata->dev->name, idx, |
804 | jiffies - entry->first_frag_time, entry->seq, | |
0795af57 JP |
805 | entry->last_frag, print_mac(mac, hdr->addr1), |
806 | print_mac(mac2, hdr->addr2)); | |
571ecf67 JB |
807 | #endif /* CONFIG_MAC80211_DEBUG */ |
808 | __skb_queue_purge(&entry->skb_list); | |
809 | } | |
810 | ||
811 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
812 | *skb = NULL; | |
813 | entry->first_frag_time = jiffies; | |
814 | entry->seq = seq; | |
815 | entry->rx_queue = rx_queue; | |
816 | entry->last_frag = frag; | |
817 | entry->ccmp = 0; | |
818 | entry->extra_len = 0; | |
819 | ||
820 | return entry; | |
821 | } | |
822 | ||
823 | static inline struct ieee80211_fragment_entry * | |
824 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
825 | u16 fc, unsigned int frag, unsigned int seq, | |
826 | int rx_queue, struct ieee80211_hdr *hdr) | |
827 | { | |
828 | struct ieee80211_fragment_entry *entry; | |
829 | int i, idx; | |
830 | ||
831 | idx = sdata->fragment_next; | |
832 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
833 | struct ieee80211_hdr *f_hdr; | |
834 | u16 f_fc; | |
835 | ||
836 | idx--; | |
837 | if (idx < 0) | |
838 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
839 | ||
840 | entry = &sdata->fragments[idx]; | |
841 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
842 | entry->rx_queue != rx_queue || | |
843 | entry->last_frag + 1 != frag) | |
844 | continue; | |
845 | ||
846 | f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; | |
847 | f_fc = le16_to_cpu(f_hdr->frame_control); | |
848 | ||
849 | if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) || | |
850 | compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || | |
851 | compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) | |
852 | continue; | |
853 | ||
ab46623e | 854 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
855 | __skb_queue_purge(&entry->skb_list); |
856 | continue; | |
857 | } | |
858 | return entry; | |
859 | } | |
860 | ||
861 | return NULL; | |
862 | } | |
863 | ||
9ae54c84 | 864 | static ieee80211_rx_result |
5cf121c3 | 865 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
866 | { |
867 | struct ieee80211_hdr *hdr; | |
868 | u16 sc; | |
869 | unsigned int frag, seq; | |
870 | struct ieee80211_fragment_entry *entry; | |
871 | struct sk_buff *skb; | |
0795af57 | 872 | DECLARE_MAC_BUF(mac); |
571ecf67 JB |
873 | |
874 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
875 | sc = le16_to_cpu(hdr->seq_ctrl); | |
876 | frag = sc & IEEE80211_SCTL_FRAG; | |
877 | ||
878 | if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) || | |
879 | (rx->skb)->len < 24 || | |
880 | is_multicast_ether_addr(hdr->addr1))) { | |
881 | /* not fragmented */ | |
882 | goto out; | |
883 | } | |
884 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
885 | ||
886 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
887 | ||
888 | if (frag == 0) { | |
889 | /* This is the first fragment of a new frame. */ | |
890 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
5cf121c3 | 891 | rx->queue, &(rx->skb)); |
8f20fc24 | 892 | if (rx->key && rx->key->conf.alg == ALG_CCMP && |
571ecf67 JB |
893 | (rx->fc & IEEE80211_FCTL_PROTECTED)) { |
894 | /* Store CCMP PN so that we can verify that the next | |
895 | * fragment has a sequential PN value. */ | |
896 | entry->ccmp = 1; | |
897 | memcpy(entry->last_pn, | |
5cf121c3 | 898 | rx->key->u.ccmp.rx_pn[rx->queue], |
571ecf67 JB |
899 | CCMP_PN_LEN); |
900 | } | |
9ae54c84 | 901 | return RX_QUEUED; |
571ecf67 JB |
902 | } |
903 | ||
904 | /* This is a fragment for a frame that should already be pending in | |
905 | * fragment cache. Add this fragment to the end of the pending entry. | |
906 | */ | |
907 | entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq, | |
5cf121c3 | 908 | rx->queue, hdr); |
571ecf67 JB |
909 | if (!entry) { |
910 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 911 | return RX_DROP_MONITOR; |
571ecf67 JB |
912 | } |
913 | ||
914 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
915 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
916 | if (entry->ccmp) { | |
917 | int i; | |
918 | u8 pn[CCMP_PN_LEN], *rpn; | |
8f20fc24 | 919 | if (!rx->key || rx->key->conf.alg != ALG_CCMP) |
e4c26add | 920 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
921 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); |
922 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
923 | pn[i]++; | |
924 | if (pn[i]) | |
925 | break; | |
926 | } | |
5cf121c3 | 927 | rpn = rx->key->u.ccmp.rx_pn[rx->queue]; |
571ecf67 | 928 | if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { |
1a84f3fd JB |
929 | if (net_ratelimit()) |
930 | printk(KERN_DEBUG "%s: defrag: CCMP PN not " | |
0795af57 | 931 | "sequential A2=%s" |
1a84f3fd JB |
932 | " PN=%02x%02x%02x%02x%02x%02x " |
933 | "(expected %02x%02x%02x%02x%02x%02x)\n", | |
0795af57 | 934 | rx->dev->name, print_mac(mac, hdr->addr2), |
1a84f3fd JB |
935 | rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], |
936 | rpn[5], pn[0], pn[1], pn[2], pn[3], | |
937 | pn[4], pn[5]); | |
e4c26add | 938 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
939 | } |
940 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); | |
941 | } | |
942 | ||
943 | skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc)); | |
944 | __skb_queue_tail(&entry->skb_list, rx->skb); | |
945 | entry->last_frag = frag; | |
946 | entry->extra_len += rx->skb->len; | |
947 | if (rx->fc & IEEE80211_FCTL_MOREFRAGS) { | |
948 | rx->skb = NULL; | |
9ae54c84 | 949 | return RX_QUEUED; |
571ecf67 JB |
950 | } |
951 | ||
952 | rx->skb = __skb_dequeue(&entry->skb_list); | |
953 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
954 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
955 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
956 | GFP_ATOMIC))) { | |
957 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
958 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 959 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
960 | } |
961 | } | |
962 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
963 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
964 | dev_kfree_skb(skb); | |
965 | } | |
966 | ||
967 | /* Complete frame has been reassembled - process it now */ | |
5cf121c3 | 968 | rx->flags |= IEEE80211_RX_FRAGMENTED; |
571ecf67 JB |
969 | |
970 | out: | |
971 | if (rx->sta) | |
972 | rx->sta->rx_packets++; | |
973 | if (is_multicast_ether_addr(hdr->addr1)) | |
974 | rx->local->dot11MulticastReceivedFrameCount++; | |
975 | else | |
976 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 977 | return RX_CONTINUE; |
571ecf67 JB |
978 | } |
979 | ||
9ae54c84 | 980 | static ieee80211_rx_result |
5cf121c3 | 981 | ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx) |
571ecf67 | 982 | { |
98f0b0a3 | 983 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); |
571ecf67 JB |
984 | struct sk_buff *skb; |
985 | int no_pending_pkts; | |
0795af57 | 986 | DECLARE_MAC_BUF(mac); |
571ecf67 JB |
987 | |
988 | if (likely(!rx->sta || | |
989 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL || | |
990 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL || | |
5cf121c3 | 991 | !(rx->flags & IEEE80211_RX_RA_MATCH))) |
9ae54c84 | 992 | return RX_CONTINUE; |
571ecf67 | 993 | |
51fb61e7 JB |
994 | if ((sdata->vif.type != IEEE80211_IF_TYPE_AP) && |
995 | (sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) | |
e4c26add | 996 | return RX_DROP_UNUSABLE; |
98f0b0a3 | 997 | |
571ecf67 JB |
998 | skb = skb_dequeue(&rx->sta->tx_filtered); |
999 | if (!skb) { | |
1000 | skb = skb_dequeue(&rx->sta->ps_tx_buf); | |
1001 | if (skb) | |
1002 | rx->local->total_ps_buffered--; | |
1003 | } | |
1004 | no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && | |
1005 | skb_queue_empty(&rx->sta->ps_tx_buf); | |
1006 | ||
1007 | if (skb) { | |
1008 | struct ieee80211_hdr *hdr = | |
1009 | (struct ieee80211_hdr *) skb->data; | |
1010 | ||
4a9a66e9 JB |
1011 | /* |
1012 | * Tell TX path to send one frame even though the STA may | |
1013 | * still remain is PS mode after this frame exchange. | |
1014 | */ | |
07346f81 | 1015 | set_sta_flags(rx->sta, WLAN_STA_PSPOLL); |
571ecf67 JB |
1016 | |
1017 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 JP |
1018 | printk(KERN_DEBUG "STA %s aid %d: PS Poll (entries after %d)\n", |
1019 | print_mac(mac, rx->sta->addr), rx->sta->aid, | |
571ecf67 JB |
1020 | skb_queue_len(&rx->sta->ps_tx_buf)); |
1021 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1022 | ||
1023 | /* Use MoreData flag to indicate whether there are more | |
1024 | * buffered frames for this STA */ | |
836341a7 | 1025 | if (no_pending_pkts) |
571ecf67 | 1026 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); |
836341a7 | 1027 | else |
571ecf67 JB |
1028 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
1029 | ||
1030 | dev_queue_xmit(skb); | |
1031 | ||
004c872e JB |
1032 | if (no_pending_pkts) |
1033 | sta_info_clear_tim_bit(rx->sta); | |
571ecf67 | 1034 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
5cf121c3 | 1035 | } else if (!rx->sent_ps_buffered) { |
004c872e JB |
1036 | /* |
1037 | * FIXME: This can be the result of a race condition between | |
1038 | * us expiring a frame and the station polling for it. | |
1039 | * Should we send it a null-func frame indicating we | |
1040 | * have nothing buffered for it? | |
1041 | */ | |
0795af57 | 1042 | printk(KERN_DEBUG "%s: STA %s sent PS Poll even " |
571ecf67 | 1043 | "though there is no buffered frames for it\n", |
0795af57 | 1044 | rx->dev->name, print_mac(mac, rx->sta->addr)); |
571ecf67 | 1045 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
571ecf67 JB |
1046 | } |
1047 | ||
9ae54c84 | 1048 | /* Free PS Poll skb here instead of returning RX_DROP that would |
571ecf67 JB |
1049 | * count as an dropped frame. */ |
1050 | dev_kfree_skb(rx->skb); | |
1051 | ||
9ae54c84 | 1052 | return RX_QUEUED; |
571ecf67 JB |
1053 | } |
1054 | ||
9ae54c84 | 1055 | static ieee80211_rx_result |
5cf121c3 | 1056 | ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx) |
6e0d114d JB |
1057 | { |
1058 | u16 fc = rx->fc; | |
1059 | u8 *data = rx->skb->data; | |
1060 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data; | |
1061 | ||
1062 | if (!WLAN_FC_IS_QOS_DATA(fc)) | |
9ae54c84 | 1063 | return RX_CONTINUE; |
6e0d114d JB |
1064 | |
1065 | /* remove the qos control field, update frame type and meta-data */ | |
1066 | memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2); | |
1067 | hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2); | |
1068 | /* change frame type to non QOS */ | |
1069 | rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA; | |
1070 | hdr->frame_control = cpu_to_le16(fc); | |
1071 | ||
9ae54c84 | 1072 | return RX_CONTINUE; |
6e0d114d JB |
1073 | } |
1074 | ||
76ee65bf | 1075 | static int |
5cf121c3 | 1076 | ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1077 | { |
07346f81 JB |
1078 | if (unlikely(!rx->sta || |
1079 | !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED))) { | |
571ecf67 | 1080 | #ifdef CONFIG_MAC80211_DEBUG |
238814fd JB |
1081 | if (net_ratelimit()) |
1082 | printk(KERN_DEBUG "%s: dropped frame " | |
1083 | "(unauthorized port)\n", rx->dev->name); | |
571ecf67 | 1084 | #endif /* CONFIG_MAC80211_DEBUG */ |
76ee65bf | 1085 | return -EACCES; |
571ecf67 JB |
1086 | } |
1087 | ||
76ee65bf | 1088 | return 0; |
571ecf67 JB |
1089 | } |
1090 | ||
76ee65bf | 1091 | static int |
5cf121c3 | 1092 | ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx) |
571ecf67 | 1093 | { |
3017b80b | 1094 | /* |
7848ba7d JB |
1095 | * Pass through unencrypted frames if the hardware has |
1096 | * decrypted them already. | |
3017b80b | 1097 | */ |
5cf121c3 | 1098 | if (rx->status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1099 | return 0; |
571ecf67 JB |
1100 | |
1101 | /* Drop unencrypted frames if key is set. */ | |
1102 | if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) && | |
1103 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
1104 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
b3fc9c6c | 1105 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1106 | return -EACCES; |
b3fc9c6c | 1107 | |
76ee65bf | 1108 | return 0; |
571ecf67 JB |
1109 | } |
1110 | ||
76ee65bf | 1111 | static int |
5cf121c3 | 1112 | ieee80211_data_to_8023(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1113 | { |
1114 | struct net_device *dev = rx->dev; | |
571ecf67 JB |
1115 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; |
1116 | u16 fc, hdrlen, ethertype; | |
1117 | u8 *payload; | |
1118 | u8 dst[ETH_ALEN]; | |
c97c23e3 | 1119 | u8 src[ETH_ALEN] __aligned(2); |
76ee65bf | 1120 | struct sk_buff *skb = rx->skb; |
571ecf67 | 1121 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 JP |
1122 | DECLARE_MAC_BUF(mac); |
1123 | DECLARE_MAC_BUF(mac2); | |
1124 | DECLARE_MAC_BUF(mac3); | |
1125 | DECLARE_MAC_BUF(mac4); | |
571ecf67 JB |
1126 | |
1127 | fc = rx->fc; | |
571ecf67 JB |
1128 | |
1129 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
76ee65bf | 1130 | return -1; |
571ecf67 JB |
1131 | |
1132 | hdrlen = ieee80211_get_hdrlen(fc); | |
1133 | ||
902acc78 | 1134 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
33b64eb2 LCC |
1135 | int meshhdrlen = ieee80211_get_mesh_hdrlen( |
1136 | (struct ieee80211s_hdr *) (skb->data + hdrlen)); | |
1137 | /* Copy on cb: | |
1138 | * - mesh header: to be used for mesh forwarding | |
1139 | * decision. It will also be used as mesh header template at | |
1140 | * tx.c:ieee80211_subif_start_xmit() if interface | |
1141 | * type is mesh and skb->pkt_type == PACKET_OTHERHOST | |
1142 | * - ta: to be used if a RERR needs to be sent. | |
1143 | */ | |
1144 | memcpy(skb->cb, skb->data + hdrlen, meshhdrlen); | |
1145 | memcpy(MESH_PREQ(skb), hdr->addr2, ETH_ALEN); | |
1146 | hdrlen += meshhdrlen; | |
1147 | } | |
33b64eb2 | 1148 | |
571ecf67 JB |
1149 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet |
1150 | * header | |
1151 | * IEEE 802.11 address fields: | |
1152 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
1153 | * 0 0 DA SA BSSID n/a | |
1154 | * 0 1 DA BSSID SA n/a | |
1155 | * 1 0 BSSID SA DA n/a | |
1156 | * 1 1 RA TA DA SA | |
1157 | */ | |
1158 | ||
1159 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
1160 | case IEEE80211_FCTL_TODS: | |
1161 | /* BSSID SA DA */ | |
1162 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
1163 | memcpy(src, hdr->addr2, ETH_ALEN); | |
1164 | ||
51fb61e7 JB |
1165 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_AP && |
1166 | sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) { | |
1a84f3fd JB |
1167 | if (net_ratelimit()) |
1168 | printk(KERN_DEBUG "%s: dropped ToDS frame " | |
0795af57 | 1169 | "(BSSID=%s SA=%s DA=%s)\n", |
1a84f3fd | 1170 | dev->name, |
0795af57 JP |
1171 | print_mac(mac, hdr->addr1), |
1172 | print_mac(mac2, hdr->addr2), | |
1173 | print_mac(mac3, hdr->addr3)); | |
76ee65bf | 1174 | return -1; |
571ecf67 JB |
1175 | } |
1176 | break; | |
1177 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
1178 | /* RA TA DA SA */ | |
1179 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
1180 | memcpy(src, hdr->addr4, ETH_ALEN); | |
1181 | ||
33b64eb2 LCC |
1182 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_WDS && |
1183 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) { | |
1184 | if (net_ratelimit()) | |
1185 | printk(KERN_DEBUG "%s: dropped FromDS&ToDS " | |
0795af57 | 1186 | "frame (RA=%s TA=%s DA=%s SA=%s)\n", |
1a84f3fd | 1187 | rx->dev->name, |
0795af57 JP |
1188 | print_mac(mac, hdr->addr1), |
1189 | print_mac(mac2, hdr->addr2), | |
1190 | print_mac(mac3, hdr->addr3), | |
1191 | print_mac(mac4, hdr->addr4)); | |
76ee65bf | 1192 | return -1; |
571ecf67 JB |
1193 | } |
1194 | break; | |
1195 | case IEEE80211_FCTL_FROMDS: | |
1196 | /* DA BSSID SA */ | |
1197 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
1198 | memcpy(src, hdr->addr3, ETH_ALEN); | |
1199 | ||
51fb61e7 | 1200 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA || |
b3316157 JL |
1201 | (is_multicast_ether_addr(dst) && |
1202 | !compare_ether_addr(src, dev->dev_addr))) | |
76ee65bf | 1203 | return -1; |
571ecf67 JB |
1204 | break; |
1205 | case 0: | |
1206 | /* DA SA BSSID */ | |
1207 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
1208 | memcpy(src, hdr->addr2, ETH_ALEN); | |
1209 | ||
51fb61e7 | 1210 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS) { |
571ecf67 | 1211 | if (net_ratelimit()) { |
0795af57 JP |
1212 | printk(KERN_DEBUG "%s: dropped IBSS frame " |
1213 | "(DA=%s SA=%s BSSID=%s)\n", | |
1214 | dev->name, | |
1215 | print_mac(mac, hdr->addr1), | |
1216 | print_mac(mac2, hdr->addr2), | |
1217 | print_mac(mac3, hdr->addr3)); | |
571ecf67 | 1218 | } |
76ee65bf | 1219 | return -1; |
571ecf67 JB |
1220 | } |
1221 | break; | |
1222 | } | |
1223 | ||
571ecf67 JB |
1224 | if (unlikely(skb->len - hdrlen < 8)) { |
1225 | if (net_ratelimit()) { | |
1226 | printk(KERN_DEBUG "%s: RX too short data frame " | |
1227 | "payload\n", dev->name); | |
1228 | } | |
76ee65bf | 1229 | return -1; |
571ecf67 JB |
1230 | } |
1231 | ||
76ee65bf | 1232 | payload = skb->data + hdrlen; |
571ecf67 JB |
1233 | ethertype = (payload[6] << 8) | payload[7]; |
1234 | ||
1235 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
1236 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
1237 | compare_ether_addr(payload, bridge_tunnel_header) == 0)) { | |
1238 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
1239 | * replace EtherType */ | |
1240 | skb_pull(skb, hdrlen + 6); | |
1241 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
1242 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
1243 | } else { | |
1244 | struct ethhdr *ehdr; | |
1245 | __be16 len; | |
ce3edf6d | 1246 | |
571ecf67 JB |
1247 | skb_pull(skb, hdrlen); |
1248 | len = htons(skb->len); | |
1249 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
1250 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
1251 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
1252 | ehdr->h_proto = len; | |
1253 | } | |
76ee65bf RR |
1254 | return 0; |
1255 | } | |
571ecf67 | 1256 | |
ce3edf6d JB |
1257 | /* |
1258 | * requires that rx->skb is a frame with ethernet header | |
1259 | */ | |
5cf121c3 | 1260 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx) |
ce3edf6d | 1261 | { |
c97c23e3 | 1262 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1263 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1264 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1265 | ||
1266 | /* | |
1267 | * Allow EAPOL frames to us/the PAE group address regardless | |
1268 | * of whether the frame was encrypted or not. | |
1269 | */ | |
1270 | if (ehdr->h_proto == htons(ETH_P_PAE) && | |
1271 | (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 || | |
1272 | compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0)) | |
1273 | return true; | |
1274 | ||
1275 | if (ieee80211_802_1x_port_control(rx) || | |
1276 | ieee80211_drop_unencrypted(rx)) | |
1277 | return false; | |
1278 | ||
1279 | return true; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * requires that rx->skb is a frame with ethernet header | |
1284 | */ | |
76ee65bf | 1285 | static void |
5cf121c3 | 1286 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf RR |
1287 | { |
1288 | struct net_device *dev = rx->dev; | |
1289 | struct ieee80211_local *local = rx->local; | |
1290 | struct sk_buff *skb, *xmit_skb; | |
1291 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
ce3edf6d JB |
1292 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1293 | struct sta_info *dsta; | |
571ecf67 | 1294 | |
76ee65bf RR |
1295 | skb = rx->skb; |
1296 | xmit_skb = NULL; | |
571ecf67 | 1297 | |
51fb61e7 JB |
1298 | if (local->bridge_packets && (sdata->vif.type == IEEE80211_IF_TYPE_AP || |
1299 | sdata->vif.type == IEEE80211_IF_TYPE_VLAN) && | |
5cf121c3 | 1300 | (rx->flags & IEEE80211_RX_RA_MATCH)) { |
ce3edf6d JB |
1301 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1302 | /* | |
1303 | * send multicast frames both to higher layers in | |
1304 | * local net stack and back to the wireless medium | |
1305 | */ | |
76ee65bf RR |
1306 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
1307 | if (!xmit_skb && net_ratelimit()) | |
571ecf67 JB |
1308 | printk(KERN_DEBUG "%s: failed to clone " |
1309 | "multicast frame\n", dev->name); | |
1310 | } else { | |
571ecf67 | 1311 | dsta = sta_info_get(local, skb->data); |
d0709a65 | 1312 | if (dsta && dsta->sdata->dev == dev) { |
ce3edf6d JB |
1313 | /* |
1314 | * The destination station is associated to | |
1315 | * this AP (in this VLAN), so send the frame | |
1316 | * directly to it and do not pass it to local | |
1317 | * net stack. | |
571ecf67 | 1318 | */ |
76ee65bf | 1319 | xmit_skb = skb; |
571ecf67 JB |
1320 | skb = NULL; |
1321 | } | |
571ecf67 JB |
1322 | } |
1323 | } | |
1324 | ||
33b64eb2 | 1325 | /* Mesh forwarding */ |
902acc78 | 1326 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
33b64eb2 LCC |
1327 | u8 *mesh_ttl = &((struct ieee80211s_hdr *)skb->cb)->ttl; |
1328 | (*mesh_ttl)--; | |
1329 | ||
1330 | if (is_multicast_ether_addr(skb->data)) { | |
1331 | if (*mesh_ttl > 0) { | |
1332 | xmit_skb = skb_copy(skb, GFP_ATOMIC); | |
69687a0b LCC |
1333 | if (xmit_skb) |
1334 | xmit_skb->pkt_type = PACKET_OTHERHOST; | |
1335 | else if (net_ratelimit()) | |
33b64eb2 LCC |
1336 | printk(KERN_DEBUG "%s: failed to clone " |
1337 | "multicast frame\n", dev->name); | |
33b64eb2 | 1338 | } else |
902acc78 JB |
1339 | IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta, |
1340 | dropped_frames_ttl); | |
33b64eb2 LCC |
1341 | } else if (skb->pkt_type != PACKET_OTHERHOST && |
1342 | compare_ether_addr(dev->dev_addr, skb->data) != 0) { | |
1343 | if (*mesh_ttl == 0) { | |
902acc78 JB |
1344 | IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta, |
1345 | dropped_frames_ttl); | |
33b64eb2 LCC |
1346 | dev_kfree_skb(skb); |
1347 | skb = NULL; | |
1348 | } else { | |
1349 | xmit_skb = skb; | |
1350 | xmit_skb->pkt_type = PACKET_OTHERHOST; | |
1351 | if (!(dev->flags & IFF_PROMISC)) | |
1352 | skb = NULL; | |
1353 | } | |
1354 | } | |
1355 | } | |
33b64eb2 | 1356 | |
571ecf67 JB |
1357 | if (skb) { |
1358 | /* deliver to local stack */ | |
1359 | skb->protocol = eth_type_trans(skb, dev); | |
1360 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1361 | netif_rx(skb); | |
1362 | } | |
1363 | ||
76ee65bf | 1364 | if (xmit_skb) { |
571ecf67 | 1365 | /* send to wireless media */ |
f831e909 | 1366 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1367 | skb_reset_network_header(xmit_skb); |
1368 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1369 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1370 | } |
76ee65bf RR |
1371 | } |
1372 | ||
9ae54c84 | 1373 | static ieee80211_rx_result |
5cf121c3 | 1374 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f RR |
1375 | { |
1376 | struct net_device *dev = rx->dev; | |
1377 | struct ieee80211_local *local = rx->local; | |
1378 | u16 fc, ethertype; | |
1379 | u8 *payload; | |
1380 | struct sk_buff *skb = rx->skb, *frame = NULL; | |
1381 | const struct ethhdr *eth; | |
1382 | int remaining, err; | |
1383 | u8 dst[ETH_ALEN]; | |
1384 | u8 src[ETH_ALEN]; | |
1385 | DECLARE_MAC_BUF(mac); | |
1386 | ||
1387 | fc = rx->fc; | |
1388 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
9ae54c84 | 1389 | return RX_CONTINUE; |
fd4c7f2f RR |
1390 | |
1391 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
e4c26add | 1392 | return RX_DROP_MONITOR; |
fd4c7f2f | 1393 | |
5cf121c3 | 1394 | if (!(rx->flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 1395 | return RX_CONTINUE; |
fd4c7f2f RR |
1396 | |
1397 | err = ieee80211_data_to_8023(rx); | |
1398 | if (unlikely(err)) | |
e4c26add | 1399 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1400 | |
1401 | skb->dev = dev; | |
1402 | ||
1403 | dev->stats.rx_packets++; | |
1404 | dev->stats.rx_bytes += skb->len; | |
1405 | ||
1406 | /* skip the wrapping header */ | |
1407 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
1408 | if (!eth) | |
e4c26add | 1409 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1410 | |
1411 | while (skb != frame) { | |
1412 | u8 padding; | |
1413 | __be16 len = eth->h_proto; | |
1414 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
1415 | ||
1416 | remaining = skb->len; | |
1417 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
1418 | memcpy(src, eth->h_source, ETH_ALEN); | |
1419 | ||
1420 | padding = ((4 - subframe_len) & 0x3); | |
1421 | /* the last MSDU has no padding */ | |
1422 | if (subframe_len > remaining) { | |
a4278e18 | 1423 | printk(KERN_DEBUG "%s: wrong buffer size\n", dev->name); |
e4c26add | 1424 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1425 | } |
1426 | ||
1427 | skb_pull(skb, sizeof(struct ethhdr)); | |
1428 | /* if last subframe reuse skb */ | |
1429 | if (remaining <= subframe_len + padding) | |
1430 | frame = skb; | |
1431 | else { | |
1432 | frame = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1433 | subframe_len); | |
1434 | ||
1435 | if (frame == NULL) | |
e4c26add | 1436 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1437 | |
1438 | skb_reserve(frame, local->hw.extra_tx_headroom + | |
1439 | sizeof(struct ethhdr)); | |
1440 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
1441 | ntohs(len)); | |
1442 | ||
1443 | eth = (struct ethhdr *) skb_pull(skb, ntohs(len) + | |
1444 | padding); | |
1445 | if (!eth) { | |
a4278e18 | 1446 | printk(KERN_DEBUG "%s: wrong buffer size\n", |
fd4c7f2f RR |
1447 | dev->name); |
1448 | dev_kfree_skb(frame); | |
e4c26add | 1449 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1450 | } |
1451 | } | |
1452 | ||
ce3edf6d | 1453 | skb_reset_network_header(frame); |
fd4c7f2f RR |
1454 | frame->dev = dev; |
1455 | frame->priority = skb->priority; | |
1456 | rx->skb = frame; | |
1457 | ||
fd4c7f2f RR |
1458 | payload = frame->data; |
1459 | ethertype = (payload[6] << 8) | payload[7]; | |
1460 | ||
1461 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
ce3edf6d JB |
1462 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
1463 | compare_ether_addr(payload, | |
1464 | bridge_tunnel_header) == 0)) { | |
fd4c7f2f RR |
1465 | /* remove RFC1042 or Bridge-Tunnel |
1466 | * encapsulation and replace EtherType */ | |
1467 | skb_pull(frame, 6); | |
1468 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
1469 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1470 | } else { | |
ce3edf6d JB |
1471 | memcpy(skb_push(frame, sizeof(__be16)), |
1472 | &len, sizeof(__be16)); | |
fd4c7f2f RR |
1473 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
1474 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1475 | } | |
1476 | ||
ce3edf6d JB |
1477 | if (!ieee80211_frame_allowed(rx)) { |
1478 | if (skb == frame) /* last frame */ | |
e4c26add | 1479 | return RX_DROP_UNUSABLE; |
ce3edf6d JB |
1480 | dev_kfree_skb(frame); |
1481 | continue; | |
1482 | } | |
fd4c7f2f RR |
1483 | |
1484 | ieee80211_deliver_skb(rx); | |
1485 | } | |
1486 | ||
9ae54c84 | 1487 | return RX_QUEUED; |
fd4c7f2f RR |
1488 | } |
1489 | ||
9ae54c84 | 1490 | static ieee80211_rx_result |
5cf121c3 | 1491 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf RR |
1492 | { |
1493 | struct net_device *dev = rx->dev; | |
1494 | u16 fc; | |
ce3edf6d | 1495 | int err; |
76ee65bf RR |
1496 | |
1497 | fc = rx->fc; | |
1498 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
9ae54c84 | 1499 | return RX_CONTINUE; |
76ee65bf RR |
1500 | |
1501 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
e4c26add | 1502 | return RX_DROP_MONITOR; |
76ee65bf | 1503 | |
76ee65bf RR |
1504 | err = ieee80211_data_to_8023(rx); |
1505 | if (unlikely(err)) | |
e4c26add | 1506 | return RX_DROP_UNUSABLE; |
76ee65bf | 1507 | |
ce3edf6d | 1508 | if (!ieee80211_frame_allowed(rx)) |
e4c26add | 1509 | return RX_DROP_MONITOR; |
ce3edf6d | 1510 | |
76ee65bf RR |
1511 | rx->skb->dev = dev; |
1512 | ||
1513 | dev->stats.rx_packets++; | |
1514 | dev->stats.rx_bytes += rx->skb->len; | |
1515 | ||
1516 | ieee80211_deliver_skb(rx); | |
571ecf67 | 1517 | |
9ae54c84 | 1518 | return RX_QUEUED; |
571ecf67 JB |
1519 | } |
1520 | ||
9ae54c84 | 1521 | static ieee80211_rx_result |
5cf121c3 | 1522 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx) |
71364716 RR |
1523 | { |
1524 | struct ieee80211_local *local = rx->local; | |
1525 | struct ieee80211_hw *hw = &local->hw; | |
1526 | struct sk_buff *skb = rx->skb; | |
1527 | struct ieee80211_bar *bar = (struct ieee80211_bar *) skb->data; | |
1528 | struct tid_ampdu_rx *tid_agg_rx; | |
1529 | u16 start_seq_num; | |
1530 | u16 tid; | |
1531 | ||
1532 | if (likely((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL)) | |
9ae54c84 | 1533 | return RX_CONTINUE; |
71364716 RR |
1534 | |
1535 | if ((rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BACK_REQ) { | |
1536 | if (!rx->sta) | |
9ae54c84 | 1537 | return RX_CONTINUE; |
71364716 | 1538 | tid = le16_to_cpu(bar->control) >> 12; |
cee24a3e RR |
1539 | if (rx->sta->ampdu_mlme.tid_state_rx[tid] |
1540 | != HT_AGG_STATE_OPERATIONAL) | |
9ae54c84 | 1541 | return RX_CONTINUE; |
cee24a3e | 1542 | tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid]; |
71364716 RR |
1543 | |
1544 | start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4; | |
1545 | ||
1546 | /* reset session timer */ | |
1547 | if (tid_agg_rx->timeout) { | |
1548 | unsigned long expires = | |
1549 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
1550 | mod_timer(&tid_agg_rx->session_timer, expires); | |
1551 | } | |
1552 | ||
1553 | /* manage reordering buffer according to requested */ | |
1554 | /* sequence number */ | |
1555 | rcu_read_lock(); | |
1556 | ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, | |
1557 | start_seq_num, 1); | |
1558 | rcu_read_unlock(); | |
e4c26add | 1559 | return RX_DROP_UNUSABLE; |
71364716 RR |
1560 | } |
1561 | ||
9ae54c84 | 1562 | return RX_CONTINUE; |
71364716 RR |
1563 | } |
1564 | ||
9ae54c84 | 1565 | static ieee80211_rx_result |
5cf121c3 | 1566 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1567 | { |
1568 | struct ieee80211_sub_if_data *sdata; | |
1569 | ||
5cf121c3 | 1570 | if (!(rx->flags & IEEE80211_RX_RA_MATCH)) |
e4c26add | 1571 | return RX_DROP_MONITOR; |
571ecf67 JB |
1572 | |
1573 | sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); | |
51fb61e7 | 1574 | if ((sdata->vif.type == IEEE80211_IF_TYPE_STA || |
33b64eb2 LCC |
1575 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS || |
1576 | sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) && | |
ddd3d2be | 1577 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
5cf121c3 | 1578 | ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->status); |
f9d540ee | 1579 | else |
e4c26add | 1580 | return RX_DROP_MONITOR; |
f9d540ee | 1581 | |
9ae54c84 | 1582 | return RX_QUEUED; |
571ecf67 JB |
1583 | } |
1584 | ||
571ecf67 JB |
1585 | static void ieee80211_rx_michael_mic_report(struct net_device *dev, |
1586 | struct ieee80211_hdr *hdr, | |
5cf121c3 | 1587 | struct ieee80211_rx_data *rx) |
571ecf67 JB |
1588 | { |
1589 | int keyidx, hdrlen; | |
0795af57 JP |
1590 | DECLARE_MAC_BUF(mac); |
1591 | DECLARE_MAC_BUF(mac2); | |
571ecf67 JB |
1592 | |
1593 | hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb); | |
1594 | if (rx->skb->len >= hdrlen + 4) | |
1595 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
1596 | else | |
1597 | keyidx = -1; | |
1598 | ||
1a84f3fd JB |
1599 | if (net_ratelimit()) |
1600 | printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " | |
0795af57 JP |
1601 | "failure from %s to %s keyidx=%d\n", |
1602 | dev->name, print_mac(mac, hdr->addr2), | |
1603 | print_mac(mac2, hdr->addr1), keyidx); | |
571ecf67 | 1604 | |
8944b79f | 1605 | if (!rx->sta) { |
aa0daf0e JB |
1606 | /* |
1607 | * Some hardware seem to generate incorrect Michael MIC | |
1608 | * reports; ignore them to avoid triggering countermeasures. | |
1609 | */ | |
1a84f3fd JB |
1610 | if (net_ratelimit()) |
1611 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
0795af57 JP |
1612 | "error for unknown address %s\n", |
1613 | dev->name, print_mac(mac, hdr->addr2)); | |
571ecf67 JB |
1614 | goto ignore; |
1615 | } | |
1616 | ||
1617 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
1a84f3fd JB |
1618 | if (net_ratelimit()) |
1619 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
aa0daf0e | 1620 | "error for a frame with no PROTECTED flag (src " |
0795af57 | 1621 | "%s)\n", dev->name, print_mac(mac, hdr->addr2)); |
571ecf67 JB |
1622 | goto ignore; |
1623 | } | |
1624 | ||
51fb61e7 | 1625 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP && keyidx) { |
aa0daf0e JB |
1626 | /* |
1627 | * APs with pairwise keys should never receive Michael MIC | |
1628 | * errors for non-zero keyidx because these are reserved for | |
1629 | * group keys and only the AP is sending real multicast | |
1630 | * frames in the BSS. | |
1631 | */ | |
eb063c17 JB |
1632 | if (net_ratelimit()) |
1633 | printk(KERN_DEBUG "%s: ignored Michael MIC error for " | |
1634 | "a frame with non-zero keyidx (%d)" | |
0795af57 JP |
1635 | " (src %s)\n", dev->name, keyidx, |
1636 | print_mac(mac, hdr->addr2)); | |
eb063c17 | 1637 | goto ignore; |
571ecf67 JB |
1638 | } |
1639 | ||
1640 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
1641 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
1642 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { | |
1a84f3fd JB |
1643 | if (net_ratelimit()) |
1644 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
1645 | "error for a frame that cannot be encrypted " | |
0795af57 JP |
1646 | "(fc=0x%04x) (src %s)\n", |
1647 | dev->name, rx->fc, print_mac(mac, hdr->addr2)); | |
571ecf67 JB |
1648 | goto ignore; |
1649 | } | |
1650 | ||
eb063c17 | 1651 | mac80211_ev_michael_mic_failure(rx->dev, keyidx, hdr); |
571ecf67 JB |
1652 | ignore: |
1653 | dev_kfree_skb(rx->skb); | |
1654 | rx->skb = NULL; | |
1655 | } | |
1656 | ||
5cf121c3 JB |
1657 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
1658 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx) | |
3d30d949 MW |
1659 | { |
1660 | struct ieee80211_sub_if_data *sdata; | |
1661 | struct ieee80211_local *local = rx->local; | |
1662 | struct ieee80211_rtap_hdr { | |
1663 | struct ieee80211_radiotap_header hdr; | |
1664 | u8 flags; | |
1665 | u8 rate; | |
1666 | __le16 chan_freq; | |
1667 | __le16 chan_flags; | |
1668 | } __attribute__ ((packed)) *rthdr; | |
1669 | struct sk_buff *skb = rx->skb, *skb2; | |
1670 | struct net_device *prev_dev = NULL; | |
5cf121c3 | 1671 | struct ieee80211_rx_status *status = rx->status; |
3d30d949 | 1672 | |
5cf121c3 | 1673 | if (rx->flags & IEEE80211_RX_CMNTR_REPORTED) |
3d30d949 MW |
1674 | goto out_free_skb; |
1675 | ||
1676 | if (skb_headroom(skb) < sizeof(*rthdr) && | |
1677 | pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) | |
1678 | goto out_free_skb; | |
1679 | ||
1680 | rthdr = (void *)skb_push(skb, sizeof(*rthdr)); | |
1681 | memset(rthdr, 0, sizeof(*rthdr)); | |
1682 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
1683 | rthdr->hdr.it_present = | |
1684 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
1685 | (1 << IEEE80211_RADIOTAP_RATE) | | |
1686 | (1 << IEEE80211_RADIOTAP_CHANNEL)); | |
1687 | ||
5cf121c3 | 1688 | rthdr->rate = rx->rate->bitrate / 5; |
3d30d949 MW |
1689 | rthdr->chan_freq = cpu_to_le16(status->freq); |
1690 | ||
1691 | if (status->band == IEEE80211_BAND_5GHZ) | |
1692 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
1693 | IEEE80211_CHAN_5GHZ); | |
1694 | else | |
1695 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN | | |
1696 | IEEE80211_CHAN_2GHZ); | |
1697 | ||
1698 | skb_set_mac_header(skb, 0); | |
1699 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1700 | skb->pkt_type = PACKET_OTHERHOST; | |
1701 | skb->protocol = htons(ETH_P_802_2); | |
1702 | ||
1703 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
1704 | if (!netif_running(sdata->dev)) | |
1705 | continue; | |
1706 | ||
1707 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || | |
1708 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) | |
1709 | continue; | |
1710 | ||
1711 | if (prev_dev) { | |
1712 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1713 | if (skb2) { | |
1714 | skb2->dev = prev_dev; | |
1715 | netif_rx(skb2); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | prev_dev = sdata->dev; | |
1720 | sdata->dev->stats.rx_packets++; | |
1721 | sdata->dev->stats.rx_bytes += skb->len; | |
1722 | } | |
1723 | ||
1724 | if (prev_dev) { | |
1725 | skb->dev = prev_dev; | |
1726 | netif_rx(skb); | |
1727 | skb = NULL; | |
1728 | } else | |
1729 | goto out_free_skb; | |
1730 | ||
5cf121c3 | 1731 | rx->flags |= IEEE80211_RX_CMNTR_REPORTED; |
3d30d949 MW |
1732 | return; |
1733 | ||
1734 | out_free_skb: | |
1735 | dev_kfree_skb(skb); | |
1736 | } | |
1737 | ||
5cf121c3 | 1738 | typedef ieee80211_rx_result (*ieee80211_rx_handler)(struct ieee80211_rx_data *); |
58905290 | 1739 | static ieee80211_rx_handler ieee80211_rx_handlers[] = |
571ecf67 | 1740 | { |
571ecf67 JB |
1741 | ieee80211_rx_h_passive_scan, |
1742 | ieee80211_rx_h_check, | |
4f0d18e2 | 1743 | ieee80211_rx_h_decrypt, |
70f08765 | 1744 | ieee80211_rx_h_sta_process, |
571ecf67 JB |
1745 | ieee80211_rx_h_defragment, |
1746 | ieee80211_rx_h_ps_poll, | |
1747 | ieee80211_rx_h_michael_mic_verify, | |
1748 | /* this must be after decryption - so header is counted in MPDU mic | |
1749 | * must be before pae and data, so QOS_DATA format frames | |
1750 | * are not passed to user space by these functions | |
1751 | */ | |
1752 | ieee80211_rx_h_remove_qos_control, | |
fd4c7f2f | 1753 | ieee80211_rx_h_amsdu, |
571ecf67 | 1754 | ieee80211_rx_h_data, |
71364716 | 1755 | ieee80211_rx_h_ctrl, |
571ecf67 JB |
1756 | ieee80211_rx_h_mgmt, |
1757 | NULL | |
1758 | }; | |
1759 | ||
8944b79f | 1760 | static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata, |
5cf121c3 | 1761 | struct ieee80211_rx_data *rx, |
8944b79f | 1762 | struct sk_buff *skb) |
58905290 JB |
1763 | { |
1764 | ieee80211_rx_handler *handler; | |
1765 | ieee80211_rx_result res = RX_DROP_MONITOR; | |
1766 | ||
8944b79f JB |
1767 | rx->skb = skb; |
1768 | rx->sdata = sdata; | |
1769 | rx->dev = sdata->dev; | |
1770 | ||
58905290 JB |
1771 | for (handler = ieee80211_rx_handlers; *handler != NULL; handler++) { |
1772 | res = (*handler)(rx); | |
1773 | ||
1774 | switch (res) { | |
1775 | case RX_CONTINUE: | |
1776 | continue; | |
1777 | case RX_DROP_UNUSABLE: | |
1778 | case RX_DROP_MONITOR: | |
8944b79f JB |
1779 | I802_DEBUG_INC(sdata->local->rx_handlers_drop); |
1780 | if (rx->sta) | |
1781 | rx->sta->rx_dropped++; | |
58905290 JB |
1782 | break; |
1783 | case RX_QUEUED: | |
8944b79f | 1784 | I802_DEBUG_INC(sdata->local->rx_handlers_queued); |
58905290 JB |
1785 | break; |
1786 | } | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | switch (res) { | |
3d30d949 | 1791 | case RX_CONTINUE: |
58905290 | 1792 | case RX_DROP_MONITOR: |
3d30d949 MW |
1793 | ieee80211_rx_cooked_monitor(rx); |
1794 | break; | |
58905290 | 1795 | case RX_DROP_UNUSABLE: |
58905290 JB |
1796 | dev_kfree_skb(rx->skb); |
1797 | break; | |
1798 | } | |
1799 | } | |
1800 | ||
571ecf67 JB |
1801 | /* main receive path */ |
1802 | ||
23a24def | 1803 | static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata, |
5cf121c3 | 1804 | u8 *bssid, struct ieee80211_rx_data *rx, |
23a24def JB |
1805 | struct ieee80211_hdr *hdr) |
1806 | { | |
1807 | int multicast = is_multicast_ether_addr(hdr->addr1); | |
1808 | ||
51fb61e7 | 1809 | switch (sdata->vif.type) { |
23a24def JB |
1810 | case IEEE80211_IF_TYPE_STA: |
1811 | if (!bssid) | |
1812 | return 0; | |
1813 | if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { | |
5cf121c3 | 1814 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1815 | return 0; |
5cf121c3 | 1816 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1817 | } else if (!multicast && |
1818 | compare_ether_addr(sdata->dev->dev_addr, | |
1819 | hdr->addr1) != 0) { | |
4150c572 | 1820 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1821 | return 0; |
5cf121c3 | 1822 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1823 | } |
1824 | break; | |
1825 | case IEEE80211_IF_TYPE_IBSS: | |
1826 | if (!bssid) | |
1827 | return 0; | |
9d9bf77d BR |
1828 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && |
1829 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) | |
1830 | return 1; | |
1831 | else if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { | |
5cf121c3 | 1832 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1833 | return 0; |
5cf121c3 | 1834 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1835 | } else if (!multicast && |
1836 | compare_ether_addr(sdata->dev->dev_addr, | |
1837 | hdr->addr1) != 0) { | |
4150c572 | 1838 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1839 | return 0; |
5cf121c3 | 1840 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
1841 | } else if (!rx->sta) |
1842 | rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb, | |
1843 | bssid, hdr->addr2); | |
1844 | break; | |
6032f934 JB |
1845 | case IEEE80211_IF_TYPE_MESH_POINT: |
1846 | if (!multicast && | |
1847 | compare_ether_addr(sdata->dev->dev_addr, | |
1848 | hdr->addr1) != 0) { | |
1849 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
1850 | return 0; | |
1851 | ||
5cf121c3 | 1852 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
1853 | } |
1854 | break; | |
fb1c1cd6 | 1855 | case IEEE80211_IF_TYPE_VLAN: |
23a24def JB |
1856 | case IEEE80211_IF_TYPE_AP: |
1857 | if (!bssid) { | |
1858 | if (compare_ether_addr(sdata->dev->dev_addr, | |
1859 | hdr->addr1)) | |
1860 | return 0; | |
1861 | } else if (!ieee80211_bssid_match(bssid, | |
1862 | sdata->dev->dev_addr)) { | |
5cf121c3 | 1863 | if (!(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def | 1864 | return 0; |
5cf121c3 | 1865 | rx->flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 1866 | } |
badffb72 | 1867 | if (sdata->dev == sdata->local->mdev && |
5cf121c3 | 1868 | !(rx->flags & IEEE80211_RX_IN_SCAN)) |
23a24def JB |
1869 | /* do not receive anything via |
1870 | * master device when not scanning */ | |
1871 | return 0; | |
1872 | break; | |
1873 | case IEEE80211_IF_TYPE_WDS: | |
1874 | if (bssid || | |
1875 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) | |
1876 | return 0; | |
1877 | if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2)) | |
1878 | return 0; | |
1879 | break; | |
fb1c1cd6 JB |
1880 | case IEEE80211_IF_TYPE_MNTR: |
1881 | /* take everything */ | |
1882 | break; | |
a2897552 | 1883 | case IEEE80211_IF_TYPE_INVALID: |
fb1c1cd6 JB |
1884 | /* should never get here */ |
1885 | WARN_ON(1); | |
1886 | break; | |
23a24def JB |
1887 | } |
1888 | ||
1889 | return 1; | |
1890 | } | |
1891 | ||
571ecf67 | 1892 | /* |
6368e4b1 RR |
1893 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
1894 | * be called with rcu_read_lock protection. | |
571ecf67 | 1895 | */ |
71ebb4aa RR |
1896 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
1897 | struct sk_buff *skb, | |
1898 | struct ieee80211_rx_status *status, | |
8318d78a | 1899 | struct ieee80211_rate *rate) |
571ecf67 JB |
1900 | { |
1901 | struct ieee80211_local *local = hw_to_local(hw); | |
1902 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 1903 | struct ieee80211_hdr *hdr; |
5cf121c3 | 1904 | struct ieee80211_rx_data rx; |
571ecf67 | 1905 | u16 type; |
6368e4b1 | 1906 | int prepares; |
8e6f0032 JB |
1907 | struct ieee80211_sub_if_data *prev = NULL; |
1908 | struct sk_buff *skb_new; | |
1909 | u8 *bssid; | |
571ecf67 JB |
1910 | |
1911 | hdr = (struct ieee80211_hdr *) skb->data; | |
1912 | memset(&rx, 0, sizeof(rx)); | |
1913 | rx.skb = skb; | |
1914 | rx.local = local; | |
1915 | ||
5cf121c3 | 1916 | rx.status = status; |
5cf121c3 | 1917 | rx.rate = rate; |
b2e7771e | 1918 | rx.fc = le16_to_cpu(hdr->frame_control); |
571ecf67 | 1919 | type = rx.fc & IEEE80211_FCTL_FTYPE; |
72abd81b | 1920 | |
b2e7771e | 1921 | if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT) |
571ecf67 | 1922 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 1923 | |
8944b79f JB |
1924 | rx.sta = sta_info_get(local, hdr->addr2); |
1925 | if (rx.sta) { | |
d0709a65 JB |
1926 | rx.sdata = rx.sta->sdata; |
1927 | rx.dev = rx.sta->sdata->dev; | |
b2e7771e | 1928 | } |
571ecf67 | 1929 | |
571ecf67 | 1930 | if ((status->flag & RX_FLAG_MMIC_ERROR)) { |
8944b79f | 1931 | ieee80211_rx_michael_mic_report(local->mdev, hdr, &rx); |
d0709a65 | 1932 | return; |
571ecf67 JB |
1933 | } |
1934 | ||
ece8eddd | 1935 | if (unlikely(local->sta_sw_scanning || local->sta_hw_scanning)) |
5cf121c3 | 1936 | rx.flags |= IEEE80211_RX_IN_SCAN; |
571ecf67 | 1937 | |
38f3714d JB |
1938 | ieee80211_parse_qos(&rx); |
1939 | ieee80211_verify_ip_alignment(&rx); | |
1940 | ||
571ecf67 JB |
1941 | skb = rx.skb; |
1942 | ||
79010420 | 1943 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
2a8a9a88 JB |
1944 | if (!netif_running(sdata->dev)) |
1945 | continue; | |
1946 | ||
51fb61e7 | 1947 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) |
b2e7771e JB |
1948 | continue; |
1949 | ||
51fb61e7 | 1950 | bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); |
5cf121c3 | 1951 | rx.flags |= IEEE80211_RX_RA_MATCH; |
6368e4b1 | 1952 | prepares = prepare_for_handlers(sdata, bssid, &rx, hdr); |
23a24def | 1953 | |
6368e4b1 | 1954 | if (!prepares) |
23a24def | 1955 | continue; |
8e6f0032 | 1956 | |
340e11f3 JB |
1957 | /* |
1958 | * frame is destined for this interface, but if it's not | |
1959 | * also for the previous one we handle that after the | |
1960 | * loop to avoid copying the SKB once too much | |
1961 | */ | |
1962 | ||
1963 | if (!prev) { | |
1964 | prev = sdata; | |
1965 | continue; | |
8e6f0032 | 1966 | } |
340e11f3 JB |
1967 | |
1968 | /* | |
1969 | * frame was destined for the previous interface | |
1970 | * so invoke RX handlers for it | |
1971 | */ | |
1972 | ||
1973 | skb_new = skb_copy(skb, GFP_ATOMIC); | |
1974 | if (!skb_new) { | |
1975 | if (net_ratelimit()) | |
1976 | printk(KERN_DEBUG "%s: failed to copy " | |
a4278e18 | 1977 | "multicast frame for %s\n", |
dd1cd4c6 JB |
1978 | wiphy_name(local->hw.wiphy), |
1979 | prev->dev->name); | |
340e11f3 JB |
1980 | continue; |
1981 | } | |
69f817b6 | 1982 | rx.fc = le16_to_cpu(hdr->frame_control); |
8944b79f | 1983 | ieee80211_invoke_rx_handlers(prev, &rx, skb_new); |
8e6f0032 | 1984 | prev = sdata; |
571ecf67 | 1985 | } |
8e6f0032 | 1986 | if (prev) { |
69f817b6 | 1987 | rx.fc = le16_to_cpu(hdr->frame_control); |
8944b79f | 1988 | ieee80211_invoke_rx_handlers(prev, &rx, skb); |
8e6f0032 JB |
1989 | } else |
1990 | dev_kfree_skb(skb); | |
571ecf67 | 1991 | } |
6368e4b1 | 1992 | |
b580781e RR |
1993 | #define SEQ_MODULO 0x1000 |
1994 | #define SEQ_MASK 0xfff | |
1995 | ||
1996 | static inline int seq_less(u16 sq1, u16 sq2) | |
1997 | { | |
1998 | return (((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1)); | |
1999 | } | |
2000 | ||
2001 | static inline u16 seq_inc(u16 sq) | |
2002 | { | |
2003 | return ((sq + 1) & SEQ_MASK); | |
2004 | } | |
2005 | ||
2006 | static inline u16 seq_sub(u16 sq1, u16 sq2) | |
2007 | { | |
2008 | return ((sq1 - sq2) & SEQ_MASK); | |
2009 | } | |
2010 | ||
2011 | ||
71364716 RR |
2012 | /* |
2013 | * As it function blongs to Rx path it must be called with | |
2014 | * the proper rcu_read_lock protection for its flow. | |
2015 | */ | |
b580781e RR |
2016 | u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, |
2017 | struct tid_ampdu_rx *tid_agg_rx, | |
2018 | struct sk_buff *skb, u16 mpdu_seq_num, | |
2019 | int bar_req) | |
2020 | { | |
2021 | struct ieee80211_local *local = hw_to_local(hw); | |
2022 | struct ieee80211_rx_status status; | |
2023 | u16 head_seq_num, buf_size; | |
2024 | int index; | |
8318d78a JB |
2025 | struct ieee80211_supported_band *sband; |
2026 | struct ieee80211_rate *rate; | |
b580781e RR |
2027 | |
2028 | buf_size = tid_agg_rx->buf_size; | |
2029 | head_seq_num = tid_agg_rx->head_seq_num; | |
2030 | ||
2031 | /* frame with out of date sequence number */ | |
2032 | if (seq_less(mpdu_seq_num, head_seq_num)) { | |
2033 | dev_kfree_skb(skb); | |
2034 | return 1; | |
2035 | } | |
2036 | ||
2037 | /* if frame sequence number exceeds our buffering window size or | |
2038 | * block Ack Request arrived - release stored frames */ | |
2039 | if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) { | |
2040 | /* new head to the ordering buffer */ | |
2041 | if (bar_req) | |
2042 | head_seq_num = mpdu_seq_num; | |
2043 | else | |
2044 | head_seq_num = | |
2045 | seq_inc(seq_sub(mpdu_seq_num, buf_size)); | |
2046 | /* release stored frames up to new head to stack */ | |
2047 | while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) { | |
2048 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2049 | tid_agg_rx->ssn) | |
2050 | % tid_agg_rx->buf_size; | |
2051 | ||
2052 | if (tid_agg_rx->reorder_buf[index]) { | |
2053 | /* release the reordered frames to stack */ | |
2054 | memcpy(&status, | |
2055 | tid_agg_rx->reorder_buf[index]->cb, | |
2056 | sizeof(status)); | |
8318d78a JB |
2057 | sband = local->hw.wiphy->bands[status.band]; |
2058 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e RR |
2059 | __ieee80211_rx_handle_packet(hw, |
2060 | tid_agg_rx->reorder_buf[index], | |
9e72ebd6 | 2061 | &status, rate); |
b580781e RR |
2062 | tid_agg_rx->stored_mpdu_num--; |
2063 | tid_agg_rx->reorder_buf[index] = NULL; | |
2064 | } | |
2065 | tid_agg_rx->head_seq_num = | |
2066 | seq_inc(tid_agg_rx->head_seq_num); | |
2067 | } | |
2068 | if (bar_req) | |
2069 | return 1; | |
2070 | } | |
2071 | ||
2072 | /* now the new frame is always in the range of the reordering */ | |
2073 | /* buffer window */ | |
2074 | index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) | |
2075 | % tid_agg_rx->buf_size; | |
2076 | /* check if we already stored this frame */ | |
2077 | if (tid_agg_rx->reorder_buf[index]) { | |
2078 | dev_kfree_skb(skb); | |
2079 | return 1; | |
2080 | } | |
2081 | ||
2082 | /* if arrived mpdu is in the right order and nothing else stored */ | |
2083 | /* release it immediately */ | |
2084 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
2085 | tid_agg_rx->stored_mpdu_num == 0) { | |
2086 | tid_agg_rx->head_seq_num = | |
2087 | seq_inc(tid_agg_rx->head_seq_num); | |
2088 | return 0; | |
2089 | } | |
2090 | ||
2091 | /* put the frame in the reordering buffer */ | |
2092 | tid_agg_rx->reorder_buf[index] = skb; | |
2093 | tid_agg_rx->stored_mpdu_num++; | |
2094 | /* release the buffer until next missing frame */ | |
2095 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) | |
2096 | % tid_agg_rx->buf_size; | |
2097 | while (tid_agg_rx->reorder_buf[index]) { | |
2098 | /* release the reordered frame back to stack */ | |
2099 | memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, | |
2100 | sizeof(status)); | |
8318d78a JB |
2101 | sband = local->hw.wiphy->bands[status.band]; |
2102 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e | 2103 | __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index], |
9e72ebd6 | 2104 | &status, rate); |
b580781e RR |
2105 | tid_agg_rx->stored_mpdu_num--; |
2106 | tid_agg_rx->reorder_buf[index] = NULL; | |
2107 | tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); | |
2108 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2109 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
2110 | } | |
2111 | return 1; | |
2112 | } | |
2113 | ||
71ebb4aa RR |
2114 | static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local, |
2115 | struct sk_buff *skb) | |
b580781e RR |
2116 | { |
2117 | struct ieee80211_hw *hw = &local->hw; | |
2118 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2119 | struct sta_info *sta; | |
2120 | struct tid_ampdu_rx *tid_agg_rx; | |
2121 | u16 fc, sc; | |
2122 | u16 mpdu_seq_num; | |
2123 | u8 ret = 0, *qc; | |
2124 | int tid; | |
2125 | ||
2126 | sta = sta_info_get(local, hdr->addr2); | |
2127 | if (!sta) | |
2128 | return ret; | |
2129 | ||
2130 | fc = le16_to_cpu(hdr->frame_control); | |
2131 | ||
2132 | /* filter the QoS data rx stream according to | |
2133 | * STA/TID and check if this STA/TID is on aggregation */ | |
2134 | if (!WLAN_FC_IS_QOS_DATA(fc)) | |
2135 | goto end_reorder; | |
2136 | ||
2137 | qc = skb->data + ieee80211_get_hdrlen(fc) - QOS_CONTROL_LEN; | |
2138 | tid = qc[0] & QOS_CONTROL_TID_MASK; | |
b580781e | 2139 | |
cee24a3e | 2140 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) |
b580781e RR |
2141 | goto end_reorder; |
2142 | ||
cee24a3e RR |
2143 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; |
2144 | ||
b580781e | 2145 | /* null data frames are excluded */ |
8b6bbe75 | 2146 | if (unlikely(fc & IEEE80211_STYPE_NULLFUNC)) |
b580781e RR |
2147 | goto end_reorder; |
2148 | ||
2149 | /* new un-ordered ampdu frame - process it */ | |
2150 | ||
2151 | /* reset session timer */ | |
2152 | if (tid_agg_rx->timeout) { | |
2153 | unsigned long expires = | |
2154 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
2155 | mod_timer(&tid_agg_rx->session_timer, expires); | |
2156 | } | |
2157 | ||
2158 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
2159 | sc = le16_to_cpu(hdr->seq_ctrl); | |
2160 | if (sc & IEEE80211_SCTL_FRAG) { | |
d0709a65 | 2161 | ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr, |
b580781e RR |
2162 | tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP); |
2163 | ret = 1; | |
2164 | goto end_reorder; | |
2165 | } | |
2166 | ||
2167 | /* according to mpdu sequence number deal with reordering buffer */ | |
2168 | mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
2169 | ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, | |
2170 | mpdu_seq_num, 0); | |
d0709a65 | 2171 | end_reorder: |
b580781e RR |
2172 | return ret; |
2173 | } | |
2174 | ||
6368e4b1 RR |
2175 | /* |
2176 | * This is the receive path handler. It is called by a low level driver when an | |
2177 | * 802.11 MPDU is received from the hardware. | |
2178 | */ | |
2179 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2180 | struct ieee80211_rx_status *status) | |
2181 | { | |
2182 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
2183 | struct ieee80211_rate *rate = NULL; |
2184 | struct ieee80211_supported_band *sband; | |
2185 | ||
2186 | if (status->band < 0 || | |
13d8fd2d | 2187 | status->band >= IEEE80211_NUM_BANDS) { |
8318d78a JB |
2188 | WARN_ON(1); |
2189 | return; | |
2190 | } | |
2191 | ||
2192 | sband = local->hw.wiphy->bands[status->band]; | |
2193 | ||
2194 | if (!sband || | |
2195 | status->rate_idx < 0 || | |
2196 | status->rate_idx >= sband->n_bitrates) { | |
2197 | WARN_ON(1); | |
2198 | return; | |
2199 | } | |
2200 | ||
2201 | rate = &sband->bitrates[status->rate_idx]; | |
6368e4b1 RR |
2202 | |
2203 | /* | |
2204 | * key references and virtual interfaces are protected using RCU | |
2205 | * and this requires that we are in a read-side RCU section during | |
2206 | * receive processing | |
2207 | */ | |
2208 | rcu_read_lock(); | |
2209 | ||
2210 | /* | |
2211 | * Frames with failed FCS/PLCP checksum are not returned, | |
2212 | * all other frames are returned without radiotap header | |
2213 | * if it was previously present. | |
2214 | * Also, frames with less than 16 bytes are dropped. | |
2215 | */ | |
8318d78a | 2216 | skb = ieee80211_rx_monitor(local, skb, status, rate); |
6368e4b1 RR |
2217 | if (!skb) { |
2218 | rcu_read_unlock(); | |
2219 | return; | |
2220 | } | |
2221 | ||
b580781e | 2222 | if (!ieee80211_rx_reorder_ampdu(local, skb)) |
9e72ebd6 | 2223 | __ieee80211_rx_handle_packet(hw, skb, status, rate); |
6368e4b1 RR |
2224 | |
2225 | rcu_read_unlock(); | |
2226 | } | |
571ecf67 JB |
2227 | EXPORT_SYMBOL(__ieee80211_rx); |
2228 | ||
2229 | /* This is a version of the rx handler that can be called from hard irq | |
2230 | * context. Post the skb on the queue and schedule the tasklet */ | |
2231 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2232 | struct ieee80211_rx_status *status) | |
2233 | { | |
2234 | struct ieee80211_local *local = hw_to_local(hw); | |
2235 | ||
2236 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
2237 | ||
2238 | skb->dev = local->mdev; | |
2239 | /* copy status into skb->cb for use by tasklet */ | |
2240 | memcpy(skb->cb, status, sizeof(*status)); | |
2241 | skb->pkt_type = IEEE80211_RX_MSG; | |
2242 | skb_queue_tail(&local->skb_queue, skb); | |
2243 | tasklet_schedule(&local->tasklet); | |
2244 | } | |
2245 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |