Commit | Line | Data |
---|---|---|
571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
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" | |
22 | #include "ieee80211_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 | ||
80 | /* | |
81 | * This function copies a received frame to all monitor interfaces and | |
82 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
83 | * radiotap header the driver might have added. | |
84 | */ | |
85 | static struct sk_buff * | |
86 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a JB |
87 | struct ieee80211_rx_status *status, |
88 | struct ieee80211_rate *rate) | |
b2e7771e JB |
89 | { |
90 | struct ieee80211_sub_if_data *sdata; | |
b2e7771e | 91 | int needed_headroom = 0; |
c49e5ea3 JB |
92 | struct ieee80211_radiotap_header *rthdr; |
93 | __le64 *rttsft = NULL; | |
94 | struct ieee80211_rtap_fixed_data { | |
b2e7771e JB |
95 | u8 flags; |
96 | u8 rate; | |
97 | __le16 chan_freq; | |
98 | __le16 chan_flags; | |
99 | u8 antsignal; | |
100 | u8 padding_for_rxflags; | |
101 | __le16 rx_flags; | |
c49e5ea3 | 102 | } __attribute__ ((packed)) *rtfixed; |
b2e7771e JB |
103 | struct sk_buff *skb, *skb2; |
104 | struct net_device *prev_dev = NULL; | |
105 | int present_fcs_len = 0; | |
106 | int rtap_len = 0; | |
107 | ||
108 | /* | |
109 | * First, we may need to make a copy of the skb because | |
110 | * (1) we need to modify it for radiotap (if not present), and | |
111 | * (2) the other RX handlers will modify the skb we got. | |
112 | * | |
113 | * We don't need to, of course, if we aren't going to return | |
114 | * the SKB because it has a bad FCS/PLCP checksum. | |
115 | */ | |
116 | if (status->flag & RX_FLAG_RADIOTAP) | |
117 | rtap_len = ieee80211_get_radiotap_len(origskb->data); | |
118 | else | |
c49e5ea3 JB |
119 | /* room for radiotap header, always present fields and TSFT */ |
120 | needed_headroom = sizeof(*rthdr) + sizeof(*rtfixed) + 8; | |
b2e7771e JB |
121 | |
122 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
123 | present_fcs_len = FCS_LEN; | |
124 | ||
125 | if (!local->monitors) { | |
126 | if (should_drop_frame(status, origskb, present_fcs_len, | |
127 | rtap_len)) { | |
128 | dev_kfree_skb(origskb); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | return remove_monitor_info(local, origskb, rtap_len); | |
133 | } | |
134 | ||
135 | if (should_drop_frame(status, origskb, present_fcs_len, rtap_len)) { | |
136 | /* only need to expand headroom if necessary */ | |
137 | skb = origskb; | |
138 | origskb = NULL; | |
139 | ||
140 | /* | |
141 | * This shouldn't trigger often because most devices have an | |
142 | * RX header they pull before we get here, and that should | |
143 | * be big enough for our radiotap information. We should | |
144 | * probably export the length to drivers so that we can have | |
145 | * them allocate enough headroom to start with. | |
146 | */ | |
147 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 148 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
149 | dev_kfree_skb(skb); |
150 | return NULL; | |
151 | } | |
152 | } else { | |
153 | /* | |
154 | * Need to make a copy and possibly remove radiotap header | |
155 | * and FCS from the original. | |
156 | */ | |
157 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
158 | ||
159 | origskb = remove_monitor_info(local, origskb, rtap_len); | |
160 | ||
161 | if (!skb) | |
162 | return origskb; | |
163 | } | |
164 | ||
165 | /* if necessary, prepend radiotap information */ | |
166 | if (!(status->flag & RX_FLAG_RADIOTAP)) { | |
c49e5ea3 JB |
167 | rtfixed = (void *) skb_push(skb, sizeof(*rtfixed)); |
168 | rtap_len = sizeof(*rthdr) + sizeof(*rtfixed); | |
169 | if (status->flag & RX_FLAG_TSFT) { | |
170 | rttsft = (void *) skb_push(skb, sizeof(*rttsft)); | |
171 | rtap_len += 8; | |
172 | } | |
b2e7771e JB |
173 | rthdr = (void *) skb_push(skb, sizeof(*rthdr)); |
174 | memset(rthdr, 0, sizeof(*rthdr)); | |
c49e5ea3 JB |
175 | memset(rtfixed, 0, sizeof(*rtfixed)); |
176 | rthdr->it_present = | |
b2e7771e JB |
177 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | |
178 | (1 << IEEE80211_RADIOTAP_RATE) | | |
179 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
180 | (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL) | | |
181 | (1 << IEEE80211_RADIOTAP_RX_FLAGS)); | |
c49e5ea3 JB |
182 | rtfixed->flags = 0; |
183 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) | |
184 | rtfixed->flags |= IEEE80211_RADIOTAP_F_FCS; | |
185 | ||
186 | if (rttsft) { | |
187 | *rttsft = cpu_to_le64(status->mactime); | |
188 | rthdr->it_present |= | |
189 | cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); | |
190 | } | |
b2e7771e JB |
191 | |
192 | /* FIXME: when radiotap gets a 'bad PLCP' flag use it here */ | |
c49e5ea3 | 193 | rtfixed->rx_flags = 0; |
b2e7771e JB |
194 | if (status->flag & |
195 | (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) | |
c49e5ea3 | 196 | rtfixed->rx_flags |= |
b2e7771e JB |
197 | cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS); |
198 | ||
8318d78a | 199 | rtfixed->rate = rate->bitrate / 5; |
b2e7771e | 200 | |
c49e5ea3 | 201 | rtfixed->chan_freq = cpu_to_le16(status->freq); |
b2e7771e | 202 | |
8318d78a | 203 | if (status->band == IEEE80211_BAND_5GHZ) |
c49e5ea3 | 204 | rtfixed->chan_flags = |
b2e7771e JB |
205 | cpu_to_le16(IEEE80211_CHAN_OFDM | |
206 | IEEE80211_CHAN_5GHZ); | |
207 | else | |
c49e5ea3 | 208 | rtfixed->chan_flags = |
b2e7771e JB |
209 | cpu_to_le16(IEEE80211_CHAN_DYN | |
210 | IEEE80211_CHAN_2GHZ); | |
211 | ||
c49e5ea3 JB |
212 | rtfixed->antsignal = status->ssi; |
213 | rthdr->it_len = cpu_to_le16(rtap_len); | |
b2e7771e JB |
214 | } |
215 | ||
ce3edf6d | 216 | skb_reset_mac_header(skb); |
b2e7771e JB |
217 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
218 | skb->pkt_type = PACKET_OTHERHOST; | |
219 | skb->protocol = htons(ETH_P_802_2); | |
220 | ||
221 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
222 | if (!netif_running(sdata->dev)) | |
223 | continue; | |
224 | ||
51fb61e7 | 225 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR) |
b2e7771e JB |
226 | continue; |
227 | ||
3d30d949 MW |
228 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
229 | continue; | |
230 | ||
b2e7771e JB |
231 | if (prev_dev) { |
232 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
233 | if (skb2) { | |
234 | skb2->dev = prev_dev; | |
235 | netif_rx(skb2); | |
236 | } | |
237 | } | |
238 | ||
239 | prev_dev = sdata->dev; | |
240 | sdata->dev->stats.rx_packets++; | |
241 | sdata->dev->stats.rx_bytes += skb->len; | |
242 | } | |
243 | ||
244 | if (prev_dev) { | |
245 | skb->dev = prev_dev; | |
246 | netif_rx(skb); | |
247 | } else | |
248 | dev_kfree_skb(skb); | |
249 | ||
250 | return origskb; | |
251 | } | |
252 | ||
253 | ||
38f3714d | 254 | static void ieee80211_parse_qos(struct ieee80211_txrx_data *rx) |
6e0d114d JB |
255 | { |
256 | u8 *data = rx->skb->data; | |
257 | int tid; | |
258 | ||
259 | /* does the frame have a qos control field? */ | |
260 | if (WLAN_FC_IS_QOS_DATA(rx->fc)) { | |
261 | u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN; | |
262 | /* frame has qos control */ | |
263 | tid = qc[0] & QOS_CONTROL_TID_MASK; | |
fd4c7f2f | 264 | if (qc[0] & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) |
64bd4b69 | 265 | rx->flags |= IEEE80211_TXRXD_RX_AMSDU; |
fd4c7f2f | 266 | else |
64bd4b69 | 267 | rx->flags &= ~IEEE80211_TXRXD_RX_AMSDU; |
6e0d114d JB |
268 | } else { |
269 | if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) { | |
270 | /* Separate TID for management frames */ | |
271 | tid = NUM_RX_DATA_QUEUES - 1; | |
272 | } else { | |
273 | /* no qos control present */ | |
274 | tid = 0; /* 802.1d - Best Effort */ | |
275 | } | |
276 | } | |
52865dfd | 277 | |
6e0d114d | 278 | I802_DEBUG_INC(rx->local->wme_rx_queue[tid]); |
52865dfd JB |
279 | /* only a debug counter, sta might not be assigned properly yet */ |
280 | if (rx->sta) | |
6e0d114d | 281 | I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]); |
6e0d114d JB |
282 | |
283 | rx->u.rx.queue = tid; | |
284 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. | |
285 | * For now, set skb->priority to 0 for other cases. */ | |
286 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 287 | } |
6e0d114d | 288 | |
38f3714d JB |
289 | static void ieee80211_verify_ip_alignment(struct ieee80211_txrx_data *rx) |
290 | { | |
291 | #ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT | |
292 | int hdrlen; | |
293 | ||
294 | if (!WLAN_FC_DATA_PRESENT(rx->fc)) | |
295 | return; | |
296 | ||
297 | /* | |
298 | * Drivers are required to align the payload data in a way that | |
299 | * guarantees that the contained IP header is aligned to a four- | |
300 | * byte boundary. In the case of regular frames, this simply means | |
301 | * aligning the payload to a four-byte boundary (because either | |
302 | * the IP header is directly contained, or IV/RFC1042 headers that | |
303 | * have a length divisible by four are in front of it. | |
304 | * | |
305 | * With A-MSDU frames, however, the payload data address must | |
306 | * yield two modulo four because there are 14-byte 802.3 headers | |
307 | * within the A-MSDU frames that push the IP header further back | |
308 | * to a multiple of four again. Thankfully, the specs were sane | |
309 | * enough this time around to require padding each A-MSDU subframe | |
310 | * to a length that is a multiple of four. | |
311 | * | |
312 | * Padding like atheros hardware adds which is inbetween the 802.11 | |
313 | * header and the payload is not supported, the driver is required | |
314 | * to move the 802.11 header further back in that case. | |
315 | */ | |
316 | hdrlen = ieee80211_get_hdrlen(rx->fc); | |
317 | if (rx->flags & IEEE80211_TXRXD_RX_AMSDU) | |
318 | hdrlen += ETH_HLEN; | |
319 | WARN_ON_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3); | |
320 | #endif | |
6e0d114d JB |
321 | } |
322 | ||
6368e4b1 | 323 | |
71ebb4aa | 324 | static u32 ieee80211_rx_load_stats(struct ieee80211_local *local, |
8318d78a JB |
325 | struct sk_buff *skb, |
326 | struct ieee80211_rx_status *status, | |
327 | struct ieee80211_rate *rate) | |
571ecf67 | 328 | { |
571ecf67 JB |
329 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
330 | u32 load = 0, hdrtime; | |
571ecf67 JB |
331 | |
332 | /* Estimate total channel use caused by this frame */ | |
333 | ||
571ecf67 JB |
334 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, |
335 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
336 | ||
8318d78a JB |
337 | if (status->band == IEEE80211_BAND_5GHZ || |
338 | (status->band == IEEE80211_BAND_5GHZ && | |
339 | rate->flags & IEEE80211_RATE_ERP_G)) | |
571ecf67 JB |
340 | hdrtime = CHAN_UTIL_HDR_SHORT; |
341 | else | |
342 | hdrtime = CHAN_UTIL_HDR_LONG; | |
343 | ||
344 | load = hdrtime; | |
345 | if (!is_multicast_ether_addr(hdr->addr1)) | |
346 | load += hdrtime; | |
347 | ||
8318d78a JB |
348 | /* TODO: optimise again */ |
349 | load += skb->len * CHAN_UTIL_RATE_LCM / rate->bitrate; | |
571ecf67 JB |
350 | |
351 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
352 | load >>= CHAN_UTIL_SHIFT; | |
571ecf67 | 353 | |
6368e4b1 | 354 | return load; |
571ecf67 JB |
355 | } |
356 | ||
571ecf67 JB |
357 | /* rx handlers */ |
358 | ||
9ae54c84 | 359 | static ieee80211_rx_result |
571ecf67 JB |
360 | ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx) |
361 | { | |
52865dfd JB |
362 | if (rx->sta) |
363 | rx->sta->channel_use_raw += rx->u.rx.load; | |
571ecf67 | 364 | rx->sdata->channel_use_raw += rx->u.rx.load; |
9ae54c84 | 365 | return RX_CONTINUE; |
571ecf67 JB |
366 | } |
367 | ||
9ae54c84 | 368 | static ieee80211_rx_result |
571ecf67 JB |
369 | ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx) |
370 | { | |
371 | struct ieee80211_local *local = rx->local; | |
372 | struct sk_buff *skb = rx->skb; | |
373 | ||
ece8eddd ZY |
374 | if (unlikely(local->sta_hw_scanning)) |
375 | return ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status); | |
376 | ||
377 | if (unlikely(local->sta_sw_scanning)) { | |
378 | /* drop all the other packets during a software scan anyway */ | |
379 | if (ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status) | |
9ae54c84 | 380 | != RX_QUEUED) |
ece8eddd | 381 | dev_kfree_skb(skb); |
9ae54c84 | 382 | return RX_QUEUED; |
571ecf67 JB |
383 | } |
384 | ||
badffb72 | 385 | if (unlikely(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) { |
571ecf67 JB |
386 | /* scanning finished during invoking of handlers */ |
387 | I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); | |
e4c26add | 388 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
389 | } |
390 | ||
9ae54c84 | 391 | return RX_CONTINUE; |
571ecf67 JB |
392 | } |
393 | ||
33b64eb2 LCC |
394 | #ifdef CONFIG_MAC80211_MESH |
395 | #define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l)) | |
396 | static ieee80211_rx_result | |
397 | ieee80211_rx_mesh_check(struct ieee80211_txrx_data *rx) | |
398 | { | |
399 | int hdrlen = ieee80211_get_hdrlen(rx->fc); | |
400 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
401 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) { | |
402 | if (!((rx->fc & IEEE80211_FCTL_FROMDS) && | |
403 | (rx->fc & IEEE80211_FCTL_TODS))) | |
404 | return RX_DROP_MONITOR; | |
405 | if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0) | |
406 | return RX_DROP_MONITOR; | |
407 | } | |
408 | ||
409 | /* If there is not an established peer link and this is not a peer link | |
410 | * establisment frame, beacon or probe, drop the frame. | |
411 | */ | |
412 | ||
413 | if (!rx->sta || rx->sta->plink_state != ESTAB) { | |
414 | struct ieee80211_mgmt *mgmt; | |
415 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) | |
416 | return RX_DROP_MONITOR; | |
417 | ||
418 | switch (rx->fc & IEEE80211_FCTL_STYPE) { | |
419 | case IEEE80211_STYPE_ACTION: | |
420 | mgmt = (struct ieee80211_mgmt *)hdr; | |
421 | if (mgmt->u.action.category != PLINK_CATEGORY) | |
422 | return RX_DROP_MONITOR; | |
423 | /* fall through on else */ | |
424 | case IEEE80211_STYPE_PROBE_REQ: | |
425 | case IEEE80211_STYPE_PROBE_RESP: | |
426 | case IEEE80211_STYPE_BEACON: | |
427 | return RX_CONTINUE; | |
428 | break; | |
429 | default: | |
430 | return RX_DROP_MONITOR; | |
431 | } | |
432 | ||
433 | } else if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
434 | is_broadcast_ether_addr(hdr->addr1) && | |
435 | mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->dev)) | |
436 | return RX_DROP_MONITOR; | |
437 | else | |
438 | return RX_CONTINUE; | |
439 | } | |
902acc78 JB |
440 | #undef msh_h_get |
441 | #else | |
442 | static inline ieee80211_rx_result | |
443 | ieee80211_rx_mesh_check(struct ieee80211_txrx_data *rx) | |
444 | { | |
445 | return RX_CONTINUE; | |
446 | } | |
33b64eb2 LCC |
447 | #endif |
448 | ||
449 | ||
9ae54c84 | 450 | static ieee80211_rx_result |
571ecf67 JB |
451 | ieee80211_rx_h_check(struct ieee80211_txrx_data *rx) |
452 | { | |
453 | struct ieee80211_hdr *hdr; | |
33b64eb2 | 454 | |
571ecf67 JB |
455 | hdr = (struct ieee80211_hdr *) rx->skb->data; |
456 | ||
457 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
458 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
459 | if (unlikely(rx->fc & IEEE80211_FCTL_RETRY && | |
460 | rx->sta->last_seq_ctrl[rx->u.rx.queue] == | |
461 | hdr->seq_ctrl)) { | |
badffb72 | 462 | if (rx->flags & IEEE80211_TXRXD_RXRA_MATCH) { |
571ecf67 JB |
463 | rx->local->dot11FrameDuplicateCount++; |
464 | rx->sta->num_duplicates++; | |
465 | } | |
e4c26add | 466 | return RX_DROP_MONITOR; |
571ecf67 JB |
467 | } else |
468 | rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl; | |
469 | } | |
470 | ||
571ecf67 JB |
471 | if (unlikely(rx->skb->len < 16)) { |
472 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 473 | return RX_DROP_MONITOR; |
571ecf67 JB |
474 | } |
475 | ||
571ecf67 JB |
476 | /* Drop disallowed frame classes based on STA auth/assoc state; |
477 | * IEEE 802.11, Chap 5.5. | |
478 | * | |
479 | * 80211.o does filtering only based on association state, i.e., it | |
480 | * drops Class 3 frames from not associated stations. hostapd sends | |
481 | * deauth/disassoc frames when needed. In addition, hostapd is | |
482 | * responsible for filtering on both auth and assoc states. | |
483 | */ | |
33b64eb2 | 484 | |
902acc78 | 485 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 486 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 487 | |
571ecf67 JB |
488 | if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA || |
489 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL && | |
490 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) && | |
51fb61e7 | 491 | rx->sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
571ecf67 JB |
492 | (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) { |
493 | if ((!(rx->fc & IEEE80211_FCTL_FROMDS) && | |
494 | !(rx->fc & IEEE80211_FCTL_TODS) && | |
495 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) | |
badffb72 | 496 | || !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) { |
571ecf67 JB |
497 | /* Drop IBSS frames and frames for other hosts |
498 | * silently. */ | |
e4c26add | 499 | return RX_DROP_MONITOR; |
571ecf67 JB |
500 | } |
501 | ||
e4c26add | 502 | return RX_DROP_MONITOR; |
571ecf67 JB |
503 | } |
504 | ||
9ae54c84 | 505 | return RX_CONTINUE; |
570bd537 JB |
506 | } |
507 | ||
508 | ||
9ae54c84 | 509 | static ieee80211_rx_result |
1990af8d | 510 | ieee80211_rx_h_decrypt(struct ieee80211_txrx_data *rx) |
570bd537 JB |
511 | { |
512 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3017b80b JB |
513 | int keyidx; |
514 | int hdrlen; | |
e4c26add | 515 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
d4e46a3d | 516 | struct ieee80211_key *stakey = NULL; |
570bd537 | 517 | |
3017b80b JB |
518 | /* |
519 | * Key selection 101 | |
520 | * | |
521 | * There are three types of keys: | |
522 | * - GTK (group keys) | |
523 | * - PTK (pairwise keys) | |
524 | * - STK (station-to-station pairwise keys) | |
525 | * | |
526 | * When selecting a key, we have to distinguish between multicast | |
527 | * (including broadcast) and unicast frames, the latter can only | |
528 | * use PTKs and STKs while the former always use GTKs. Unless, of | |
529 | * course, actual WEP keys ("pre-RSNA") are used, then unicast | |
530 | * frames can also use key indizes like GTKs. Hence, if we don't | |
531 | * have a PTK/STK we check the key index for a WEP key. | |
532 | * | |
8dc06a1c JB |
533 | * Note that in a regular BSS, multicast frames are sent by the |
534 | * AP only, associated stations unicast the frame to the AP first | |
535 | * which then multicasts it on their behalf. | |
536 | * | |
3017b80b JB |
537 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
538 | * with each station, that is something we don't currently handle. | |
8dc06a1c JB |
539 | * The spec seems to expect that one negotiates the same key with |
540 | * every station but there's no such requirement; VLANs could be | |
541 | * possible. | |
3017b80b JB |
542 | */ |
543 | ||
544 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) | |
9ae54c84 | 545 | return RX_CONTINUE; |
571ecf67 | 546 | |
3017b80b | 547 | /* |
1990af8d | 548 | * No point in finding a key and decrypting if the frame is neither |
3017b80b JB |
549 | * addressed to us nor a multicast frame. |
550 | */ | |
badffb72 | 551 | if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) |
9ae54c84 | 552 | return RX_CONTINUE; |
3017b80b | 553 | |
d4e46a3d JB |
554 | if (rx->sta) |
555 | stakey = rcu_dereference(rx->sta->key); | |
556 | ||
557 | if (!is_multicast_ether_addr(hdr->addr1) && stakey) { | |
558 | rx->key = stakey; | |
571ecf67 | 559 | } else { |
3017b80b JB |
560 | /* |
561 | * The device doesn't give us the IV so we won't be | |
562 | * able to look up the key. That's ok though, we | |
563 | * don't need to decrypt the frame, we just won't | |
564 | * be able to keep statistics accurate. | |
565 | * Except for key threshold notifications, should | |
566 | * we somehow allow the driver to tell us which key | |
567 | * the hardware used if this flag is set? | |
568 | */ | |
7848ba7d JB |
569 | if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) && |
570 | (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED)) | |
9ae54c84 | 571 | return RX_CONTINUE; |
3017b80b JB |
572 | |
573 | hdrlen = ieee80211_get_hdrlen(rx->fc); | |
574 | ||
575 | if (rx->skb->len < 8 + hdrlen) | |
e4c26add | 576 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
3017b80b JB |
577 | |
578 | /* | |
579 | * no need to call ieee80211_wep_get_keyidx, | |
580 | * it verifies a bunch of things we've done already | |
581 | */ | |
582 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
583 | ||
d4e46a3d | 584 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
3017b80b JB |
585 | |
586 | /* | |
587 | * RSNA-protected unicast frames should always be sent with | |
588 | * pairwise or station-to-station keys, but for WEP we allow | |
589 | * using a key index as well. | |
590 | */ | |
8f20fc24 | 591 | if (rx->key && rx->key->conf.alg != ALG_WEP && |
3017b80b JB |
592 | !is_multicast_ether_addr(hdr->addr1)) |
593 | rx->key = NULL; | |
571ecf67 JB |
594 | } |
595 | ||
3017b80b | 596 | if (rx->key) { |
571ecf67 | 597 | rx->key->tx_rx_count++; |
011bfcc4 | 598 | /* TODO: add threshold stuff again */ |
1990af8d | 599 | } else { |
7f3ad894 | 600 | #ifdef CONFIG_MAC80211_DEBUG |
70f08765 JB |
601 | if (net_ratelimit()) |
602 | printk(KERN_DEBUG "%s: RX protected frame," | |
603 | " but have no key\n", rx->dev->name); | |
7f3ad894 | 604 | #endif /* CONFIG_MAC80211_DEBUG */ |
e4c26add | 605 | return RX_DROP_MONITOR; |
70f08765 JB |
606 | } |
607 | ||
1990af8d JB |
608 | /* Check for weak IVs if possible */ |
609 | if (rx->sta && rx->key->conf.alg == ALG_WEP && | |
610 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) && | |
611 | (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED) || | |
612 | !(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) && | |
613 | ieee80211_wep_is_weak_iv(rx->skb, rx->key)) | |
614 | rx->sta->wep_weak_iv_count++; | |
615 | ||
70f08765 JB |
616 | switch (rx->key->conf.alg) { |
617 | case ALG_WEP: | |
e2f036da MN |
618 | result = ieee80211_crypto_wep_decrypt(rx); |
619 | break; | |
70f08765 | 620 | case ALG_TKIP: |
e2f036da MN |
621 | result = ieee80211_crypto_tkip_decrypt(rx); |
622 | break; | |
70f08765 | 623 | case ALG_CCMP: |
e2f036da MN |
624 | result = ieee80211_crypto_ccmp_decrypt(rx); |
625 | break; | |
70f08765 JB |
626 | } |
627 | ||
e2f036da MN |
628 | /* either the frame has been decrypted or will be dropped */ |
629 | rx->u.rx.status->flag |= RX_FLAG_DECRYPTED; | |
630 | ||
631 | return result; | |
70f08765 JB |
632 | } |
633 | ||
571ecf67 JB |
634 | static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta) |
635 | { | |
636 | struct ieee80211_sub_if_data *sdata; | |
0795af57 JP |
637 | DECLARE_MAC_BUF(mac); |
638 | ||
571ecf67 JB |
639 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); |
640 | ||
641 | if (sdata->bss) | |
642 | atomic_inc(&sdata->bss->num_sta_ps); | |
643 | sta->flags |= WLAN_STA_PS; | |
4a9a66e9 | 644 | sta->flags &= ~WLAN_STA_PSPOLL; |
571ecf67 | 645 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
646 | printk(KERN_DEBUG "%s: STA %s aid %d enters power save mode\n", |
647 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 JB |
648 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
649 | } | |
650 | ||
651 | static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) | |
652 | { | |
653 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
654 | struct sk_buff *skb; | |
655 | int sent = 0; | |
656 | struct ieee80211_sub_if_data *sdata; | |
657 | struct ieee80211_tx_packet_data *pkt_data; | |
0795af57 | 658 | DECLARE_MAC_BUF(mac); |
571ecf67 JB |
659 | |
660 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
004c872e | 661 | |
571ecf67 JB |
662 | if (sdata->bss) |
663 | atomic_dec(&sdata->bss->num_sta_ps); | |
004c872e | 664 | |
836341a7 | 665 | sta->flags &= ~(WLAN_STA_PS | WLAN_STA_PSPOLL); |
004c872e JB |
666 | |
667 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
668 | sta_info_clear_tim_bit(sta); | |
669 | ||
571ecf67 | 670 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0795af57 JP |
671 | printk(KERN_DEBUG "%s: STA %s aid %d exits power save mode\n", |
672 | dev->name, print_mac(mac, sta->addr), sta->aid); | |
571ecf67 | 673 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
004c872e | 674 | |
571ecf67 JB |
675 | /* Send all buffered frames to the station */ |
676 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
677 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
678 | sent++; | |
e8bf9649 | 679 | pkt_data->flags |= IEEE80211_TXPD_REQUEUE; |
571ecf67 JB |
680 | dev_queue_xmit(skb); |
681 | } | |
682 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
683 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
684 | local->total_ps_buffered--; | |
685 | sent++; | |
686 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 | 687 | printk(KERN_DEBUG "%s: STA %s aid %d send PS frame " |
571ecf67 | 688 | "since STA not sleeping anymore\n", dev->name, |
0795af57 | 689 | print_mac(mac, sta->addr), sta->aid); |
571ecf67 | 690 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
e8bf9649 | 691 | pkt_data->flags |= IEEE80211_TXPD_REQUEUE; |
571ecf67 JB |
692 | dev_queue_xmit(skb); |
693 | } | |
694 | ||
695 | return sent; | |
696 | } | |
697 | ||
9ae54c84 | 698 | static ieee80211_rx_result |
571ecf67 JB |
699 | ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx) |
700 | { | |
701 | struct sta_info *sta = rx->sta; | |
702 | struct net_device *dev = rx->dev; | |
703 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
704 | ||
705 | if (!sta) | |
9ae54c84 | 706 | return RX_CONTINUE; |
571ecf67 JB |
707 | |
708 | /* Update last_rx only for IBSS packets which are for the current | |
709 | * BSSID to avoid keeping the current IBSS network alive in cases where | |
710 | * other STAs are using different BSSID. */ | |
51fb61e7 | 711 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
71364716 RR |
712 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
713 | IEEE80211_IF_TYPE_IBSS); | |
571ecf67 JB |
714 | if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) |
715 | sta->last_rx = jiffies; | |
716 | } else | |
717 | if (!is_multicast_ether_addr(hdr->addr1) || | |
51fb61e7 | 718 | rx->sdata->vif.type == IEEE80211_IF_TYPE_STA) { |
571ecf67 JB |
719 | /* Update last_rx only for unicast frames in order to prevent |
720 | * the Probe Request frames (the only broadcast frames from a | |
721 | * STA in infrastructure mode) from keeping a connection alive. | |
33b64eb2 LCC |
722 | * Mesh beacons will update last_rx when if they are found to |
723 | * match the current local configuration when processed. | |
571ecf67 JB |
724 | */ |
725 | sta->last_rx = jiffies; | |
726 | } | |
727 | ||
badffb72 | 728 | if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) |
9ae54c84 | 729 | return RX_CONTINUE; |
571ecf67 JB |
730 | |
731 | sta->rx_fragments++; | |
732 | sta->rx_bytes += rx->skb->len; | |
6c55aa97 LF |
733 | sta->last_rssi = rx->u.rx.status->ssi; |
734 | sta->last_signal = rx->u.rx.status->signal; | |
735 | sta->last_noise = rx->u.rx.status->noise; | |
571ecf67 JB |
736 | |
737 | if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) { | |
738 | /* Change STA power saving mode only in the end of a frame | |
739 | * exchange sequence */ | |
740 | if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM)) | |
741 | rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta); | |
742 | else if (!(sta->flags & WLAN_STA_PS) && | |
743 | (rx->fc & IEEE80211_FCTL_PM)) | |
744 | ap_sta_ps_start(dev, sta); | |
745 | } | |
746 | ||
747 | /* Drop data::nullfunc frames silently, since they are used only to | |
748 | * control station power saving mode. */ | |
749 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
750 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) { | |
751 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); | |
752 | /* Update counter and free packet here to avoid counting this | |
753 | * as a dropped packed. */ | |
754 | sta->rx_packets++; | |
755 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 756 | return RX_QUEUED; |
571ecf67 JB |
757 | } |
758 | ||
9ae54c84 | 759 | return RX_CONTINUE; |
571ecf67 JB |
760 | } /* ieee80211_rx_h_sta_process */ |
761 | ||
571ecf67 JB |
762 | static inline struct ieee80211_fragment_entry * |
763 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
764 | unsigned int frag, unsigned int seq, int rx_queue, | |
765 | struct sk_buff **skb) | |
766 | { | |
767 | struct ieee80211_fragment_entry *entry; | |
768 | int idx; | |
769 | ||
770 | idx = sdata->fragment_next; | |
771 | entry = &sdata->fragments[sdata->fragment_next++]; | |
772 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
773 | sdata->fragment_next = 0; | |
774 | ||
775 | if (!skb_queue_empty(&entry->skb_list)) { | |
776 | #ifdef CONFIG_MAC80211_DEBUG | |
777 | struct ieee80211_hdr *hdr = | |
778 | (struct ieee80211_hdr *) entry->skb_list.next->data; | |
0795af57 JP |
779 | DECLARE_MAC_BUF(mac); |
780 | DECLARE_MAC_BUF(mac2); | |
571ecf67 JB |
781 | printk(KERN_DEBUG "%s: RX reassembly removed oldest " |
782 | "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " | |
0795af57 | 783 | "addr1=%s addr2=%s\n", |
571ecf67 JB |
784 | sdata->dev->name, idx, |
785 | jiffies - entry->first_frag_time, entry->seq, | |
0795af57 JP |
786 | entry->last_frag, print_mac(mac, hdr->addr1), |
787 | print_mac(mac2, hdr->addr2)); | |
571ecf67 JB |
788 | #endif /* CONFIG_MAC80211_DEBUG */ |
789 | __skb_queue_purge(&entry->skb_list); | |
790 | } | |
791 | ||
792 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
793 | *skb = NULL; | |
794 | entry->first_frag_time = jiffies; | |
795 | entry->seq = seq; | |
796 | entry->rx_queue = rx_queue; | |
797 | entry->last_frag = frag; | |
798 | entry->ccmp = 0; | |
799 | entry->extra_len = 0; | |
800 | ||
801 | return entry; | |
802 | } | |
803 | ||
804 | static inline struct ieee80211_fragment_entry * | |
805 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
806 | u16 fc, unsigned int frag, unsigned int seq, | |
807 | int rx_queue, struct ieee80211_hdr *hdr) | |
808 | { | |
809 | struct ieee80211_fragment_entry *entry; | |
810 | int i, idx; | |
811 | ||
812 | idx = sdata->fragment_next; | |
813 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
814 | struct ieee80211_hdr *f_hdr; | |
815 | u16 f_fc; | |
816 | ||
817 | idx--; | |
818 | if (idx < 0) | |
819 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
820 | ||
821 | entry = &sdata->fragments[idx]; | |
822 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
823 | entry->rx_queue != rx_queue || | |
824 | entry->last_frag + 1 != frag) | |
825 | continue; | |
826 | ||
827 | f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; | |
828 | f_fc = le16_to_cpu(f_hdr->frame_control); | |
829 | ||
830 | if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) || | |
831 | compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || | |
832 | compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) | |
833 | continue; | |
834 | ||
ab46623e | 835 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
836 | __skb_queue_purge(&entry->skb_list); |
837 | continue; | |
838 | } | |
839 | return entry; | |
840 | } | |
841 | ||
842 | return NULL; | |
843 | } | |
844 | ||
9ae54c84 | 845 | static ieee80211_rx_result |
571ecf67 JB |
846 | ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx) |
847 | { | |
848 | struct ieee80211_hdr *hdr; | |
849 | u16 sc; | |
850 | unsigned int frag, seq; | |
851 | struct ieee80211_fragment_entry *entry; | |
852 | struct sk_buff *skb; | |
0795af57 | 853 | DECLARE_MAC_BUF(mac); |
571ecf67 JB |
854 | |
855 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
856 | sc = le16_to_cpu(hdr->seq_ctrl); | |
857 | frag = sc & IEEE80211_SCTL_FRAG; | |
858 | ||
859 | if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) || | |
860 | (rx->skb)->len < 24 || | |
861 | is_multicast_ether_addr(hdr->addr1))) { | |
862 | /* not fragmented */ | |
863 | goto out; | |
864 | } | |
865 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
866 | ||
867 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
868 | ||
869 | if (frag == 0) { | |
870 | /* This is the first fragment of a new frame. */ | |
871 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
872 | rx->u.rx.queue, &(rx->skb)); | |
8f20fc24 | 873 | if (rx->key && rx->key->conf.alg == ALG_CCMP && |
571ecf67 JB |
874 | (rx->fc & IEEE80211_FCTL_PROTECTED)) { |
875 | /* Store CCMP PN so that we can verify that the next | |
876 | * fragment has a sequential PN value. */ | |
877 | entry->ccmp = 1; | |
878 | memcpy(entry->last_pn, | |
879 | rx->key->u.ccmp.rx_pn[rx->u.rx.queue], | |
880 | CCMP_PN_LEN); | |
881 | } | |
9ae54c84 | 882 | return RX_QUEUED; |
571ecf67 JB |
883 | } |
884 | ||
885 | /* This is a fragment for a frame that should already be pending in | |
886 | * fragment cache. Add this fragment to the end of the pending entry. | |
887 | */ | |
888 | entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq, | |
889 | rx->u.rx.queue, hdr); | |
890 | if (!entry) { | |
891 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 892 | return RX_DROP_MONITOR; |
571ecf67 JB |
893 | } |
894 | ||
895 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
896 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
897 | if (entry->ccmp) { | |
898 | int i; | |
899 | u8 pn[CCMP_PN_LEN], *rpn; | |
8f20fc24 | 900 | if (!rx->key || rx->key->conf.alg != ALG_CCMP) |
e4c26add | 901 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
902 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); |
903 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
904 | pn[i]++; | |
905 | if (pn[i]) | |
906 | break; | |
907 | } | |
908 | rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue]; | |
909 | if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { | |
1a84f3fd JB |
910 | if (net_ratelimit()) |
911 | printk(KERN_DEBUG "%s: defrag: CCMP PN not " | |
0795af57 | 912 | "sequential A2=%s" |
1a84f3fd JB |
913 | " PN=%02x%02x%02x%02x%02x%02x " |
914 | "(expected %02x%02x%02x%02x%02x%02x)\n", | |
0795af57 | 915 | rx->dev->name, print_mac(mac, hdr->addr2), |
1a84f3fd JB |
916 | rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], |
917 | rpn[5], pn[0], pn[1], pn[2], pn[3], | |
918 | pn[4], pn[5]); | |
e4c26add | 919 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
920 | } |
921 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); | |
922 | } | |
923 | ||
924 | skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc)); | |
925 | __skb_queue_tail(&entry->skb_list, rx->skb); | |
926 | entry->last_frag = frag; | |
927 | entry->extra_len += rx->skb->len; | |
928 | if (rx->fc & IEEE80211_FCTL_MOREFRAGS) { | |
929 | rx->skb = NULL; | |
9ae54c84 | 930 | return RX_QUEUED; |
571ecf67 JB |
931 | } |
932 | ||
933 | rx->skb = __skb_dequeue(&entry->skb_list); | |
934 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
935 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
936 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
937 | GFP_ATOMIC))) { | |
938 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
939 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 940 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
941 | } |
942 | } | |
943 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
944 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
945 | dev_kfree_skb(skb); | |
946 | } | |
947 | ||
948 | /* Complete frame has been reassembled - process it now */ | |
badffb72 | 949 | rx->flags |= IEEE80211_TXRXD_FRAGMENTED; |
571ecf67 JB |
950 | |
951 | out: | |
952 | if (rx->sta) | |
953 | rx->sta->rx_packets++; | |
954 | if (is_multicast_ether_addr(hdr->addr1)) | |
955 | rx->local->dot11MulticastReceivedFrameCount++; | |
956 | else | |
957 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 958 | return RX_CONTINUE; |
571ecf67 JB |
959 | } |
960 | ||
9ae54c84 | 961 | static ieee80211_rx_result |
571ecf67 JB |
962 | ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx) |
963 | { | |
98f0b0a3 | 964 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); |
571ecf67 JB |
965 | struct sk_buff *skb; |
966 | int no_pending_pkts; | |
0795af57 | 967 | DECLARE_MAC_BUF(mac); |
571ecf67 JB |
968 | |
969 | if (likely(!rx->sta || | |
970 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL || | |
971 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL || | |
badffb72 | 972 | !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))) |
9ae54c84 | 973 | return RX_CONTINUE; |
571ecf67 | 974 | |
51fb61e7 JB |
975 | if ((sdata->vif.type != IEEE80211_IF_TYPE_AP) && |
976 | (sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) | |
e4c26add | 977 | return RX_DROP_UNUSABLE; |
98f0b0a3 | 978 | |
571ecf67 JB |
979 | skb = skb_dequeue(&rx->sta->tx_filtered); |
980 | if (!skb) { | |
981 | skb = skb_dequeue(&rx->sta->ps_tx_buf); | |
982 | if (skb) | |
983 | rx->local->total_ps_buffered--; | |
984 | } | |
985 | no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && | |
986 | skb_queue_empty(&rx->sta->ps_tx_buf); | |
987 | ||
988 | if (skb) { | |
989 | struct ieee80211_hdr *hdr = | |
990 | (struct ieee80211_hdr *) skb->data; | |
991 | ||
4a9a66e9 JB |
992 | /* |
993 | * Tell TX path to send one frame even though the STA may | |
994 | * still remain is PS mode after this frame exchange. | |
995 | */ | |
996 | rx->sta->flags |= WLAN_STA_PSPOLL; | |
571ecf67 JB |
997 | |
998 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
0795af57 JP |
999 | printk(KERN_DEBUG "STA %s aid %d: PS Poll (entries after %d)\n", |
1000 | print_mac(mac, rx->sta->addr), rx->sta->aid, | |
571ecf67 JB |
1001 | skb_queue_len(&rx->sta->ps_tx_buf)); |
1002 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1003 | ||
1004 | /* Use MoreData flag to indicate whether there are more | |
1005 | * buffered frames for this STA */ | |
836341a7 | 1006 | if (no_pending_pkts) |
571ecf67 | 1007 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); |
836341a7 | 1008 | else |
571ecf67 JB |
1009 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
1010 | ||
1011 | dev_queue_xmit(skb); | |
1012 | ||
004c872e JB |
1013 | if (no_pending_pkts) |
1014 | sta_info_clear_tim_bit(rx->sta); | |
571ecf67 JB |
1015 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
1016 | } else if (!rx->u.rx.sent_ps_buffered) { | |
004c872e JB |
1017 | /* |
1018 | * FIXME: This can be the result of a race condition between | |
1019 | * us expiring a frame and the station polling for it. | |
1020 | * Should we send it a null-func frame indicating we | |
1021 | * have nothing buffered for it? | |
1022 | */ | |
0795af57 | 1023 | printk(KERN_DEBUG "%s: STA %s sent PS Poll even " |
571ecf67 | 1024 | "though there is no buffered frames for it\n", |
0795af57 | 1025 | rx->dev->name, print_mac(mac, rx->sta->addr)); |
571ecf67 | 1026 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
571ecf67 JB |
1027 | } |
1028 | ||
9ae54c84 | 1029 | /* Free PS Poll skb here instead of returning RX_DROP that would |
571ecf67 JB |
1030 | * count as an dropped frame. */ |
1031 | dev_kfree_skb(rx->skb); | |
1032 | ||
9ae54c84 | 1033 | return RX_QUEUED; |
571ecf67 JB |
1034 | } |
1035 | ||
9ae54c84 | 1036 | static ieee80211_rx_result |
6e0d114d JB |
1037 | ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx) |
1038 | { | |
1039 | u16 fc = rx->fc; | |
1040 | u8 *data = rx->skb->data; | |
1041 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data; | |
1042 | ||
1043 | if (!WLAN_FC_IS_QOS_DATA(fc)) | |
9ae54c84 | 1044 | return RX_CONTINUE; |
6e0d114d JB |
1045 | |
1046 | /* remove the qos control field, update frame type and meta-data */ | |
1047 | memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2); | |
1048 | hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2); | |
1049 | /* change frame type to non QOS */ | |
1050 | rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA; | |
1051 | hdr->frame_control = cpu_to_le16(fc); | |
1052 | ||
9ae54c84 | 1053 | return RX_CONTINUE; |
6e0d114d JB |
1054 | } |
1055 | ||
76ee65bf | 1056 | static int |
ce3edf6d | 1057 | ieee80211_802_1x_port_control(struct ieee80211_txrx_data *rx) |
571ecf67 | 1058 | { |
238814fd | 1059 | if (unlikely(!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED))) { |
571ecf67 | 1060 | #ifdef CONFIG_MAC80211_DEBUG |
238814fd JB |
1061 | if (net_ratelimit()) |
1062 | printk(KERN_DEBUG "%s: dropped frame " | |
1063 | "(unauthorized port)\n", rx->dev->name); | |
571ecf67 | 1064 | #endif /* CONFIG_MAC80211_DEBUG */ |
76ee65bf | 1065 | return -EACCES; |
571ecf67 JB |
1066 | } |
1067 | ||
76ee65bf | 1068 | return 0; |
571ecf67 JB |
1069 | } |
1070 | ||
76ee65bf | 1071 | static int |
ce3edf6d | 1072 | ieee80211_drop_unencrypted(struct ieee80211_txrx_data *rx) |
571ecf67 | 1073 | { |
3017b80b | 1074 | /* |
7848ba7d JB |
1075 | * Pass through unencrypted frames if the hardware has |
1076 | * decrypted them already. | |
3017b80b | 1077 | */ |
7848ba7d | 1078 | if (rx->u.rx.status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1079 | return 0; |
571ecf67 JB |
1080 | |
1081 | /* Drop unencrypted frames if key is set. */ | |
1082 | if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) && | |
1083 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
1084 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
ce3edf6d | 1085 | (rx->key || rx->sdata->drop_unencrypted))) { |
1a84f3fd JB |
1086 | if (net_ratelimit()) |
1087 | printk(KERN_DEBUG "%s: RX non-WEP frame, but expected " | |
1088 | "encryption\n", rx->dev->name); | |
76ee65bf | 1089 | return -EACCES; |
571ecf67 | 1090 | } |
76ee65bf | 1091 | return 0; |
571ecf67 JB |
1092 | } |
1093 | ||
76ee65bf RR |
1094 | static int |
1095 | ieee80211_data_to_8023(struct ieee80211_txrx_data *rx) | |
571ecf67 JB |
1096 | { |
1097 | struct net_device *dev = rx->dev; | |
571ecf67 JB |
1098 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; |
1099 | u16 fc, hdrlen, ethertype; | |
1100 | u8 *payload; | |
1101 | u8 dst[ETH_ALEN]; | |
1102 | u8 src[ETH_ALEN]; | |
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 JB |
1109 | |
1110 | fc = rx->fc; | |
571ecf67 JB |
1111 | |
1112 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
76ee65bf | 1113 | return -1; |
571ecf67 JB |
1114 | |
1115 | hdrlen = ieee80211_get_hdrlen(fc); | |
1116 | ||
902acc78 | 1117 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
33b64eb2 LCC |
1118 | int meshhdrlen = ieee80211_get_mesh_hdrlen( |
1119 | (struct ieee80211s_hdr *) (skb->data + hdrlen)); | |
1120 | /* Copy on cb: | |
1121 | * - mesh header: to be used for mesh forwarding | |
1122 | * decision. It will also be used as mesh header template at | |
1123 | * tx.c:ieee80211_subif_start_xmit() if interface | |
1124 | * type is mesh and skb->pkt_type == PACKET_OTHERHOST | |
1125 | * - ta: to be used if a RERR needs to be sent. | |
1126 | */ | |
1127 | memcpy(skb->cb, skb->data + hdrlen, meshhdrlen); | |
1128 | memcpy(MESH_PREQ(skb), hdr->addr2, ETH_ALEN); | |
1129 | hdrlen += meshhdrlen; | |
1130 | } | |
33b64eb2 | 1131 | |
571ecf67 JB |
1132 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet |
1133 | * header | |
1134 | * IEEE 802.11 address fields: | |
1135 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
1136 | * 0 0 DA SA BSSID n/a | |
1137 | * 0 1 DA BSSID SA n/a | |
1138 | * 1 0 BSSID SA DA n/a | |
1139 | * 1 1 RA TA DA SA | |
1140 | */ | |
1141 | ||
1142 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
1143 | case IEEE80211_FCTL_TODS: | |
1144 | /* BSSID SA DA */ | |
1145 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
1146 | memcpy(src, hdr->addr2, ETH_ALEN); | |
1147 | ||
51fb61e7 JB |
1148 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_AP && |
1149 | sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) { | |
1a84f3fd JB |
1150 | if (net_ratelimit()) |
1151 | printk(KERN_DEBUG "%s: dropped ToDS frame " | |
0795af57 | 1152 | "(BSSID=%s SA=%s DA=%s)\n", |
1a84f3fd | 1153 | dev->name, |
0795af57 JP |
1154 | print_mac(mac, hdr->addr1), |
1155 | print_mac(mac2, hdr->addr2), | |
1156 | print_mac(mac3, hdr->addr3)); | |
76ee65bf | 1157 | return -1; |
571ecf67 JB |
1158 | } |
1159 | break; | |
1160 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
1161 | /* RA TA DA SA */ | |
1162 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
1163 | memcpy(src, hdr->addr4, ETH_ALEN); | |
1164 | ||
33b64eb2 LCC |
1165 | if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_WDS && |
1166 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) { | |
1167 | if (net_ratelimit()) | |
1168 | printk(KERN_DEBUG "%s: dropped FromDS&ToDS " | |
0795af57 | 1169 | "frame (RA=%s TA=%s DA=%s SA=%s)\n", |
1a84f3fd | 1170 | rx->dev->name, |
0795af57 JP |
1171 | print_mac(mac, hdr->addr1), |
1172 | print_mac(mac2, hdr->addr2), | |
1173 | print_mac(mac3, hdr->addr3), | |
1174 | print_mac(mac4, hdr->addr4)); | |
76ee65bf | 1175 | return -1; |
571ecf67 JB |
1176 | } |
1177 | break; | |
1178 | case IEEE80211_FCTL_FROMDS: | |
1179 | /* DA BSSID SA */ | |
1180 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
1181 | memcpy(src, hdr->addr3, ETH_ALEN); | |
1182 | ||
51fb61e7 | 1183 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA || |
b3316157 JL |
1184 | (is_multicast_ether_addr(dst) && |
1185 | !compare_ether_addr(src, dev->dev_addr))) | |
76ee65bf | 1186 | return -1; |
571ecf67 JB |
1187 | break; |
1188 | case 0: | |
1189 | /* DA SA BSSID */ | |
1190 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
1191 | memcpy(src, hdr->addr2, ETH_ALEN); | |
1192 | ||
51fb61e7 | 1193 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS) { |
571ecf67 | 1194 | if (net_ratelimit()) { |
0795af57 JP |
1195 | printk(KERN_DEBUG "%s: dropped IBSS frame " |
1196 | "(DA=%s SA=%s BSSID=%s)\n", | |
1197 | dev->name, | |
1198 | print_mac(mac, hdr->addr1), | |
1199 | print_mac(mac2, hdr->addr2), | |
1200 | print_mac(mac3, hdr->addr3)); | |
571ecf67 | 1201 | } |
76ee65bf | 1202 | return -1; |
571ecf67 JB |
1203 | } |
1204 | break; | |
1205 | } | |
1206 | ||
571ecf67 JB |
1207 | if (unlikely(skb->len - hdrlen < 8)) { |
1208 | if (net_ratelimit()) { | |
1209 | printk(KERN_DEBUG "%s: RX too short data frame " | |
1210 | "payload\n", dev->name); | |
1211 | } | |
76ee65bf | 1212 | return -1; |
571ecf67 JB |
1213 | } |
1214 | ||
76ee65bf | 1215 | payload = skb->data + hdrlen; |
571ecf67 JB |
1216 | ethertype = (payload[6] << 8) | payload[7]; |
1217 | ||
1218 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
1219 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
1220 | compare_ether_addr(payload, bridge_tunnel_header) == 0)) { | |
1221 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
1222 | * replace EtherType */ | |
1223 | skb_pull(skb, hdrlen + 6); | |
1224 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
1225 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
1226 | } else { | |
1227 | struct ethhdr *ehdr; | |
1228 | __be16 len; | |
ce3edf6d | 1229 | |
571ecf67 JB |
1230 | skb_pull(skb, hdrlen); |
1231 | len = htons(skb->len); | |
1232 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
1233 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
1234 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
1235 | ehdr->h_proto = len; | |
1236 | } | |
76ee65bf RR |
1237 | return 0; |
1238 | } | |
571ecf67 | 1239 | |
ce3edf6d JB |
1240 | /* |
1241 | * requires that rx->skb is a frame with ethernet header | |
1242 | */ | |
1243 | static bool ieee80211_frame_allowed(struct ieee80211_txrx_data *rx) | |
1244 | { | |
1245 | static const u8 pae_group_addr[ETH_ALEN] | |
1246 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; | |
1247 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1248 | ||
1249 | /* | |
1250 | * Allow EAPOL frames to us/the PAE group address regardless | |
1251 | * of whether the frame was encrypted or not. | |
1252 | */ | |
1253 | if (ehdr->h_proto == htons(ETH_P_PAE) && | |
1254 | (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 || | |
1255 | compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0)) | |
1256 | return true; | |
1257 | ||
1258 | if (ieee80211_802_1x_port_control(rx) || | |
1259 | ieee80211_drop_unencrypted(rx)) | |
1260 | return false; | |
1261 | ||
1262 | return true; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * requires that rx->skb is a frame with ethernet header | |
1267 | */ | |
76ee65bf RR |
1268 | static void |
1269 | ieee80211_deliver_skb(struct ieee80211_txrx_data *rx) | |
1270 | { | |
1271 | struct net_device *dev = rx->dev; | |
1272 | struct ieee80211_local *local = rx->local; | |
1273 | struct sk_buff *skb, *xmit_skb; | |
1274 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
ce3edf6d JB |
1275 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1276 | struct sta_info *dsta; | |
571ecf67 | 1277 | |
76ee65bf RR |
1278 | skb = rx->skb; |
1279 | xmit_skb = NULL; | |
571ecf67 | 1280 | |
51fb61e7 JB |
1281 | if (local->bridge_packets && (sdata->vif.type == IEEE80211_IF_TYPE_AP || |
1282 | sdata->vif.type == IEEE80211_IF_TYPE_VLAN) && | |
badffb72 | 1283 | (rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) { |
ce3edf6d JB |
1284 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1285 | /* | |
1286 | * send multicast frames both to higher layers in | |
1287 | * local net stack and back to the wireless medium | |
1288 | */ | |
76ee65bf RR |
1289 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
1290 | if (!xmit_skb && net_ratelimit()) | |
571ecf67 JB |
1291 | printk(KERN_DEBUG "%s: failed to clone " |
1292 | "multicast frame\n", dev->name); | |
1293 | } else { | |
571ecf67 | 1294 | dsta = sta_info_get(local, skb->data); |
ce3edf6d JB |
1295 | if (dsta && dsta->dev == dev) { |
1296 | /* | |
1297 | * The destination station is associated to | |
1298 | * this AP (in this VLAN), so send the frame | |
1299 | * directly to it and do not pass it to local | |
1300 | * net stack. | |
571ecf67 | 1301 | */ |
76ee65bf | 1302 | xmit_skb = skb; |
571ecf67 JB |
1303 | skb = NULL; |
1304 | } | |
1305 | if (dsta) | |
1306 | sta_info_put(dsta); | |
1307 | } | |
1308 | } | |
1309 | ||
33b64eb2 | 1310 | /* Mesh forwarding */ |
902acc78 | 1311 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
33b64eb2 LCC |
1312 | u8 *mesh_ttl = &((struct ieee80211s_hdr *)skb->cb)->ttl; |
1313 | (*mesh_ttl)--; | |
1314 | ||
1315 | if (is_multicast_ether_addr(skb->data)) { | |
1316 | if (*mesh_ttl > 0) { | |
1317 | xmit_skb = skb_copy(skb, GFP_ATOMIC); | |
1318 | if (!xmit_skb && net_ratelimit()) | |
1319 | printk(KERN_DEBUG "%s: failed to clone " | |
1320 | "multicast frame\n", dev->name); | |
1321 | else | |
1322 | xmit_skb->pkt_type = PACKET_OTHERHOST; | |
1323 | } else | |
902acc78 JB |
1324 | IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta, |
1325 | dropped_frames_ttl); | |
33b64eb2 LCC |
1326 | } else if (skb->pkt_type != PACKET_OTHERHOST && |
1327 | compare_ether_addr(dev->dev_addr, skb->data) != 0) { | |
1328 | if (*mesh_ttl == 0) { | |
902acc78 JB |
1329 | IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta, |
1330 | dropped_frames_ttl); | |
33b64eb2 LCC |
1331 | dev_kfree_skb(skb); |
1332 | skb = NULL; | |
1333 | } else { | |
1334 | xmit_skb = skb; | |
1335 | xmit_skb->pkt_type = PACKET_OTHERHOST; | |
1336 | if (!(dev->flags & IFF_PROMISC)) | |
1337 | skb = NULL; | |
1338 | } | |
1339 | } | |
1340 | } | |
33b64eb2 | 1341 | |
571ecf67 JB |
1342 | if (skb) { |
1343 | /* deliver to local stack */ | |
1344 | skb->protocol = eth_type_trans(skb, dev); | |
1345 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1346 | netif_rx(skb); | |
1347 | } | |
1348 | ||
76ee65bf | 1349 | if (xmit_skb) { |
571ecf67 | 1350 | /* send to wireless media */ |
f831e909 | 1351 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
1352 | skb_reset_network_header(xmit_skb); |
1353 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 1354 | dev_queue_xmit(xmit_skb); |
571ecf67 | 1355 | } |
76ee65bf RR |
1356 | } |
1357 | ||
9ae54c84 | 1358 | static ieee80211_rx_result |
fd4c7f2f RR |
1359 | ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx) |
1360 | { | |
1361 | struct net_device *dev = rx->dev; | |
1362 | struct ieee80211_local *local = rx->local; | |
1363 | u16 fc, ethertype; | |
1364 | u8 *payload; | |
1365 | struct sk_buff *skb = rx->skb, *frame = NULL; | |
1366 | const struct ethhdr *eth; | |
1367 | int remaining, err; | |
1368 | u8 dst[ETH_ALEN]; | |
1369 | u8 src[ETH_ALEN]; | |
1370 | DECLARE_MAC_BUF(mac); | |
1371 | ||
1372 | fc = rx->fc; | |
1373 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
9ae54c84 | 1374 | return RX_CONTINUE; |
fd4c7f2f RR |
1375 | |
1376 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
e4c26add | 1377 | return RX_DROP_MONITOR; |
fd4c7f2f | 1378 | |
64bd4b69 | 1379 | if (!(rx->flags & IEEE80211_TXRXD_RX_AMSDU)) |
9ae54c84 | 1380 | return RX_CONTINUE; |
fd4c7f2f RR |
1381 | |
1382 | err = ieee80211_data_to_8023(rx); | |
1383 | if (unlikely(err)) | |
e4c26add | 1384 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1385 | |
1386 | skb->dev = dev; | |
1387 | ||
1388 | dev->stats.rx_packets++; | |
1389 | dev->stats.rx_bytes += skb->len; | |
1390 | ||
1391 | /* skip the wrapping header */ | |
1392 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
1393 | if (!eth) | |
e4c26add | 1394 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1395 | |
1396 | while (skb != frame) { | |
1397 | u8 padding; | |
1398 | __be16 len = eth->h_proto; | |
1399 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
1400 | ||
1401 | remaining = skb->len; | |
1402 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
1403 | memcpy(src, eth->h_source, ETH_ALEN); | |
1404 | ||
1405 | padding = ((4 - subframe_len) & 0x3); | |
1406 | /* the last MSDU has no padding */ | |
1407 | if (subframe_len > remaining) { | |
1408 | printk(KERN_DEBUG "%s: wrong buffer size", dev->name); | |
e4c26add | 1409 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1410 | } |
1411 | ||
1412 | skb_pull(skb, sizeof(struct ethhdr)); | |
1413 | /* if last subframe reuse skb */ | |
1414 | if (remaining <= subframe_len + padding) | |
1415 | frame = skb; | |
1416 | else { | |
1417 | frame = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1418 | subframe_len); | |
1419 | ||
1420 | if (frame == NULL) | |
e4c26add | 1421 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1422 | |
1423 | skb_reserve(frame, local->hw.extra_tx_headroom + | |
1424 | sizeof(struct ethhdr)); | |
1425 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
1426 | ntohs(len)); | |
1427 | ||
1428 | eth = (struct ethhdr *) skb_pull(skb, ntohs(len) + | |
1429 | padding); | |
1430 | if (!eth) { | |
1431 | printk(KERN_DEBUG "%s: wrong buffer size ", | |
1432 | dev->name); | |
1433 | dev_kfree_skb(frame); | |
e4c26add | 1434 | return RX_DROP_UNUSABLE; |
fd4c7f2f RR |
1435 | } |
1436 | } | |
1437 | ||
ce3edf6d | 1438 | skb_reset_network_header(frame); |
fd4c7f2f RR |
1439 | frame->dev = dev; |
1440 | frame->priority = skb->priority; | |
1441 | rx->skb = frame; | |
1442 | ||
fd4c7f2f RR |
1443 | payload = frame->data; |
1444 | ethertype = (payload[6] << 8) | payload[7]; | |
1445 | ||
1446 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
ce3edf6d JB |
1447 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
1448 | compare_ether_addr(payload, | |
1449 | bridge_tunnel_header) == 0)) { | |
fd4c7f2f RR |
1450 | /* remove RFC1042 or Bridge-Tunnel |
1451 | * encapsulation and replace EtherType */ | |
1452 | skb_pull(frame, 6); | |
1453 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
1454 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1455 | } else { | |
ce3edf6d JB |
1456 | memcpy(skb_push(frame, sizeof(__be16)), |
1457 | &len, sizeof(__be16)); | |
fd4c7f2f RR |
1458 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
1459 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
1460 | } | |
1461 | ||
ce3edf6d JB |
1462 | if (!ieee80211_frame_allowed(rx)) { |
1463 | if (skb == frame) /* last frame */ | |
e4c26add | 1464 | return RX_DROP_UNUSABLE; |
ce3edf6d JB |
1465 | dev_kfree_skb(frame); |
1466 | continue; | |
1467 | } | |
fd4c7f2f RR |
1468 | |
1469 | ieee80211_deliver_skb(rx); | |
1470 | } | |
1471 | ||
9ae54c84 | 1472 | return RX_QUEUED; |
fd4c7f2f RR |
1473 | } |
1474 | ||
9ae54c84 | 1475 | static ieee80211_rx_result |
76ee65bf RR |
1476 | ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) |
1477 | { | |
1478 | struct net_device *dev = rx->dev; | |
1479 | u16 fc; | |
ce3edf6d | 1480 | int err; |
76ee65bf RR |
1481 | |
1482 | fc = rx->fc; | |
1483 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
9ae54c84 | 1484 | return RX_CONTINUE; |
76ee65bf RR |
1485 | |
1486 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
e4c26add | 1487 | return RX_DROP_MONITOR; |
76ee65bf | 1488 | |
76ee65bf RR |
1489 | err = ieee80211_data_to_8023(rx); |
1490 | if (unlikely(err)) | |
e4c26add | 1491 | return RX_DROP_UNUSABLE; |
76ee65bf | 1492 | |
ce3edf6d | 1493 | if (!ieee80211_frame_allowed(rx)) |
e4c26add | 1494 | return RX_DROP_MONITOR; |
ce3edf6d | 1495 | |
76ee65bf RR |
1496 | rx->skb->dev = dev; |
1497 | ||
1498 | dev->stats.rx_packets++; | |
1499 | dev->stats.rx_bytes += rx->skb->len; | |
1500 | ||
1501 | ieee80211_deliver_skb(rx); | |
571ecf67 | 1502 | |
9ae54c84 | 1503 | return RX_QUEUED; |
571ecf67 JB |
1504 | } |
1505 | ||
9ae54c84 | 1506 | static ieee80211_rx_result |
71364716 RR |
1507 | ieee80211_rx_h_ctrl(struct ieee80211_txrx_data *rx) |
1508 | { | |
1509 | struct ieee80211_local *local = rx->local; | |
1510 | struct ieee80211_hw *hw = &local->hw; | |
1511 | struct sk_buff *skb = rx->skb; | |
1512 | struct ieee80211_bar *bar = (struct ieee80211_bar *) skb->data; | |
1513 | struct tid_ampdu_rx *tid_agg_rx; | |
1514 | u16 start_seq_num; | |
1515 | u16 tid; | |
1516 | ||
1517 | if (likely((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL)) | |
9ae54c84 | 1518 | return RX_CONTINUE; |
71364716 RR |
1519 | |
1520 | if ((rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BACK_REQ) { | |
1521 | if (!rx->sta) | |
9ae54c84 | 1522 | return RX_CONTINUE; |
71364716 RR |
1523 | tid = le16_to_cpu(bar->control) >> 12; |
1524 | tid_agg_rx = &(rx->sta->ampdu_mlme.tid_rx[tid]); | |
1525 | if (tid_agg_rx->state != HT_AGG_STATE_OPERATIONAL) | |
9ae54c84 | 1526 | return RX_CONTINUE; |
71364716 RR |
1527 | |
1528 | start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4; | |
1529 | ||
1530 | /* reset session timer */ | |
1531 | if (tid_agg_rx->timeout) { | |
1532 | unsigned long expires = | |
1533 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
1534 | mod_timer(&tid_agg_rx->session_timer, expires); | |
1535 | } | |
1536 | ||
1537 | /* manage reordering buffer according to requested */ | |
1538 | /* sequence number */ | |
1539 | rcu_read_lock(); | |
1540 | ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, | |
1541 | start_seq_num, 1); | |
1542 | rcu_read_unlock(); | |
e4c26add | 1543 | return RX_DROP_UNUSABLE; |
71364716 RR |
1544 | } |
1545 | ||
9ae54c84 | 1546 | return RX_CONTINUE; |
71364716 RR |
1547 | } |
1548 | ||
9ae54c84 | 1549 | static ieee80211_rx_result |
571ecf67 JB |
1550 | ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx) |
1551 | { | |
1552 | struct ieee80211_sub_if_data *sdata; | |
1553 | ||
badffb72 | 1554 | if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) |
e4c26add | 1555 | return RX_DROP_MONITOR; |
571ecf67 JB |
1556 | |
1557 | sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); | |
51fb61e7 | 1558 | if ((sdata->vif.type == IEEE80211_IF_TYPE_STA || |
33b64eb2 LCC |
1559 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS || |
1560 | sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) && | |
ddd3d2be | 1561 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
571ecf67 | 1562 | ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status); |
f9d540ee | 1563 | else |
e4c26add | 1564 | return RX_DROP_MONITOR; |
f9d540ee | 1565 | |
9ae54c84 | 1566 | return RX_QUEUED; |
571ecf67 JB |
1567 | } |
1568 | ||
571ecf67 JB |
1569 | static void ieee80211_rx_michael_mic_report(struct net_device *dev, |
1570 | struct ieee80211_hdr *hdr, | |
571ecf67 JB |
1571 | struct ieee80211_txrx_data *rx) |
1572 | { | |
1573 | int keyidx, hdrlen; | |
0795af57 JP |
1574 | DECLARE_MAC_BUF(mac); |
1575 | DECLARE_MAC_BUF(mac2); | |
571ecf67 JB |
1576 | |
1577 | hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb); | |
1578 | if (rx->skb->len >= hdrlen + 4) | |
1579 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
1580 | else | |
1581 | keyidx = -1; | |
1582 | ||
1a84f3fd JB |
1583 | if (net_ratelimit()) |
1584 | printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " | |
0795af57 JP |
1585 | "failure from %s to %s keyidx=%d\n", |
1586 | dev->name, print_mac(mac, hdr->addr2), | |
1587 | print_mac(mac2, hdr->addr1), keyidx); | |
571ecf67 | 1588 | |
8944b79f | 1589 | if (!rx->sta) { |
aa0daf0e JB |
1590 | /* |
1591 | * Some hardware seem to generate incorrect Michael MIC | |
1592 | * reports; ignore them to avoid triggering countermeasures. | |
1593 | */ | |
1a84f3fd JB |
1594 | if (net_ratelimit()) |
1595 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
0795af57 JP |
1596 | "error for unknown address %s\n", |
1597 | dev->name, print_mac(mac, hdr->addr2)); | |
571ecf67 JB |
1598 | goto ignore; |
1599 | } | |
1600 | ||
1601 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
1a84f3fd JB |
1602 | if (net_ratelimit()) |
1603 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
aa0daf0e | 1604 | "error for a frame with no PROTECTED flag (src " |
0795af57 | 1605 | "%s)\n", dev->name, print_mac(mac, hdr->addr2)); |
571ecf67 JB |
1606 | goto ignore; |
1607 | } | |
1608 | ||
51fb61e7 | 1609 | if (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP && keyidx) { |
aa0daf0e JB |
1610 | /* |
1611 | * APs with pairwise keys should never receive Michael MIC | |
1612 | * errors for non-zero keyidx because these are reserved for | |
1613 | * group keys and only the AP is sending real multicast | |
1614 | * frames in the BSS. | |
1615 | */ | |
eb063c17 JB |
1616 | if (net_ratelimit()) |
1617 | printk(KERN_DEBUG "%s: ignored Michael MIC error for " | |
1618 | "a frame with non-zero keyidx (%d)" | |
0795af57 JP |
1619 | " (src %s)\n", dev->name, keyidx, |
1620 | print_mac(mac, hdr->addr2)); | |
eb063c17 | 1621 | goto ignore; |
571ecf67 JB |
1622 | } |
1623 | ||
1624 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
1625 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
1626 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { | |
1a84f3fd JB |
1627 | if (net_ratelimit()) |
1628 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
1629 | "error for a frame that cannot be encrypted " | |
0795af57 JP |
1630 | "(fc=0x%04x) (src %s)\n", |
1631 | dev->name, rx->fc, print_mac(mac, hdr->addr2)); | |
571ecf67 JB |
1632 | goto ignore; |
1633 | } | |
1634 | ||
eb063c17 | 1635 | mac80211_ev_michael_mic_failure(rx->dev, keyidx, hdr); |
571ecf67 JB |
1636 | ignore: |
1637 | dev_kfree_skb(rx->skb); | |
1638 | rx->skb = NULL; | |
1639 | } | |
1640 | ||
3d30d949 MW |
1641 | static void ieee80211_rx_cooked_monitor(struct ieee80211_txrx_data *rx) |
1642 | { | |
1643 | struct ieee80211_sub_if_data *sdata; | |
1644 | struct ieee80211_local *local = rx->local; | |
1645 | struct ieee80211_rtap_hdr { | |
1646 | struct ieee80211_radiotap_header hdr; | |
1647 | u8 flags; | |
1648 | u8 rate; | |
1649 | __le16 chan_freq; | |
1650 | __le16 chan_flags; | |
1651 | } __attribute__ ((packed)) *rthdr; | |
1652 | struct sk_buff *skb = rx->skb, *skb2; | |
1653 | struct net_device *prev_dev = NULL; | |
1654 | struct ieee80211_rx_status *status = rx->u.rx.status; | |
1655 | ||
1656 | if (rx->flags & IEEE80211_TXRXD_RX_CMNTR_REPORTED) | |
1657 | goto out_free_skb; | |
1658 | ||
1659 | if (skb_headroom(skb) < sizeof(*rthdr) && | |
1660 | pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) | |
1661 | goto out_free_skb; | |
1662 | ||
1663 | rthdr = (void *)skb_push(skb, sizeof(*rthdr)); | |
1664 | memset(rthdr, 0, sizeof(*rthdr)); | |
1665 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
1666 | rthdr->hdr.it_present = | |
1667 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
1668 | (1 << IEEE80211_RADIOTAP_RATE) | | |
1669 | (1 << IEEE80211_RADIOTAP_CHANNEL)); | |
1670 | ||
1671 | rthdr->rate = rx->u.rx.rate->bitrate / 5; | |
1672 | rthdr->chan_freq = cpu_to_le16(status->freq); | |
1673 | ||
1674 | if (status->band == IEEE80211_BAND_5GHZ) | |
1675 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM | | |
1676 | IEEE80211_CHAN_5GHZ); | |
1677 | else | |
1678 | rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN | | |
1679 | IEEE80211_CHAN_2GHZ); | |
1680 | ||
1681 | skb_set_mac_header(skb, 0); | |
1682 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1683 | skb->pkt_type = PACKET_OTHERHOST; | |
1684 | skb->protocol = htons(ETH_P_802_2); | |
1685 | ||
1686 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
1687 | if (!netif_running(sdata->dev)) | |
1688 | continue; | |
1689 | ||
1690 | if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || | |
1691 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) | |
1692 | continue; | |
1693 | ||
1694 | if (prev_dev) { | |
1695 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1696 | if (skb2) { | |
1697 | skb2->dev = prev_dev; | |
1698 | netif_rx(skb2); | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | prev_dev = sdata->dev; | |
1703 | sdata->dev->stats.rx_packets++; | |
1704 | sdata->dev->stats.rx_bytes += skb->len; | |
1705 | } | |
1706 | ||
1707 | if (prev_dev) { | |
1708 | skb->dev = prev_dev; | |
1709 | netif_rx(skb); | |
1710 | skb = NULL; | |
1711 | } else | |
1712 | goto out_free_skb; | |
1713 | ||
1714 | rx->flags |= IEEE80211_TXRXD_RX_CMNTR_REPORTED; | |
1715 | return; | |
1716 | ||
1717 | out_free_skb: | |
1718 | dev_kfree_skb(skb); | |
1719 | } | |
1720 | ||
58905290 JB |
1721 | typedef ieee80211_rx_result (*ieee80211_rx_handler)(struct ieee80211_txrx_data *); |
1722 | static ieee80211_rx_handler ieee80211_rx_handlers[] = | |
571ecf67 JB |
1723 | { |
1724 | ieee80211_rx_h_if_stats, | |
571ecf67 JB |
1725 | ieee80211_rx_h_passive_scan, |
1726 | ieee80211_rx_h_check, | |
4f0d18e2 | 1727 | ieee80211_rx_h_decrypt, |
70f08765 | 1728 | ieee80211_rx_h_sta_process, |
571ecf67 JB |
1729 | ieee80211_rx_h_defragment, |
1730 | ieee80211_rx_h_ps_poll, | |
1731 | ieee80211_rx_h_michael_mic_verify, | |
1732 | /* this must be after decryption - so header is counted in MPDU mic | |
1733 | * must be before pae and data, so QOS_DATA format frames | |
1734 | * are not passed to user space by these functions | |
1735 | */ | |
1736 | ieee80211_rx_h_remove_qos_control, | |
fd4c7f2f | 1737 | ieee80211_rx_h_amsdu, |
571ecf67 | 1738 | ieee80211_rx_h_data, |
71364716 | 1739 | ieee80211_rx_h_ctrl, |
571ecf67 JB |
1740 | ieee80211_rx_h_mgmt, |
1741 | NULL | |
1742 | }; | |
1743 | ||
8944b79f | 1744 | static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata, |
58905290 | 1745 | struct ieee80211_txrx_data *rx, |
8944b79f | 1746 | struct sk_buff *skb) |
58905290 JB |
1747 | { |
1748 | ieee80211_rx_handler *handler; | |
1749 | ieee80211_rx_result res = RX_DROP_MONITOR; | |
1750 | ||
8944b79f JB |
1751 | rx->skb = skb; |
1752 | rx->sdata = sdata; | |
1753 | rx->dev = sdata->dev; | |
1754 | ||
58905290 JB |
1755 | for (handler = ieee80211_rx_handlers; *handler != NULL; handler++) { |
1756 | res = (*handler)(rx); | |
1757 | ||
1758 | switch (res) { | |
1759 | case RX_CONTINUE: | |
1760 | continue; | |
1761 | case RX_DROP_UNUSABLE: | |
1762 | case RX_DROP_MONITOR: | |
8944b79f JB |
1763 | I802_DEBUG_INC(sdata->local->rx_handlers_drop); |
1764 | if (rx->sta) | |
1765 | rx->sta->rx_dropped++; | |
58905290 JB |
1766 | break; |
1767 | case RX_QUEUED: | |
8944b79f | 1768 | I802_DEBUG_INC(sdata->local->rx_handlers_queued); |
58905290 JB |
1769 | break; |
1770 | } | |
1771 | break; | |
1772 | } | |
1773 | ||
1774 | switch (res) { | |
3d30d949 | 1775 | case RX_CONTINUE: |
58905290 | 1776 | case RX_DROP_MONITOR: |
3d30d949 MW |
1777 | ieee80211_rx_cooked_monitor(rx); |
1778 | break; | |
58905290 | 1779 | case RX_DROP_UNUSABLE: |
58905290 JB |
1780 | dev_kfree_skb(rx->skb); |
1781 | break; | |
1782 | } | |
1783 | } | |
1784 | ||
571ecf67 JB |
1785 | /* main receive path */ |
1786 | ||
23a24def JB |
1787 | static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata, |
1788 | u8 *bssid, struct ieee80211_txrx_data *rx, | |
1789 | struct ieee80211_hdr *hdr) | |
1790 | { | |
1791 | int multicast = is_multicast_ether_addr(hdr->addr1); | |
1792 | ||
51fb61e7 | 1793 | switch (sdata->vif.type) { |
23a24def JB |
1794 | case IEEE80211_IF_TYPE_STA: |
1795 | if (!bssid) | |
1796 | return 0; | |
1797 | if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { | |
badffb72 | 1798 | if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) |
23a24def | 1799 | return 0; |
badffb72 | 1800 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; |
23a24def JB |
1801 | } else if (!multicast && |
1802 | compare_ether_addr(sdata->dev->dev_addr, | |
1803 | hdr->addr1) != 0) { | |
4150c572 | 1804 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1805 | return 0; |
badffb72 | 1806 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; |
23a24def JB |
1807 | } |
1808 | break; | |
1809 | case IEEE80211_IF_TYPE_IBSS: | |
1810 | if (!bssid) | |
1811 | return 0; | |
9d9bf77d BR |
1812 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && |
1813 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) | |
1814 | return 1; | |
1815 | else if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) { | |
badffb72 | 1816 | if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) |
23a24def | 1817 | return 0; |
badffb72 | 1818 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; |
23a24def JB |
1819 | } else if (!multicast && |
1820 | compare_ether_addr(sdata->dev->dev_addr, | |
1821 | hdr->addr1) != 0) { | |
4150c572 | 1822 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 1823 | return 0; |
badffb72 | 1824 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; |
23a24def JB |
1825 | } else if (!rx->sta) |
1826 | rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb, | |
1827 | bssid, hdr->addr2); | |
1828 | break; | |
6032f934 JB |
1829 | case IEEE80211_IF_TYPE_MESH_POINT: |
1830 | if (!multicast && | |
1831 | compare_ether_addr(sdata->dev->dev_addr, | |
1832 | hdr->addr1) != 0) { | |
1833 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
1834 | return 0; | |
1835 | ||
1836 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; | |
1837 | } | |
1838 | break; | |
fb1c1cd6 | 1839 | case IEEE80211_IF_TYPE_VLAN: |
23a24def JB |
1840 | case IEEE80211_IF_TYPE_AP: |
1841 | if (!bssid) { | |
1842 | if (compare_ether_addr(sdata->dev->dev_addr, | |
1843 | hdr->addr1)) | |
1844 | return 0; | |
1845 | } else if (!ieee80211_bssid_match(bssid, | |
1846 | sdata->dev->dev_addr)) { | |
badffb72 | 1847 | if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) |
23a24def | 1848 | return 0; |
badffb72 | 1849 | rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH; |
23a24def | 1850 | } |
badffb72 JS |
1851 | if (sdata->dev == sdata->local->mdev && |
1852 | !(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) | |
23a24def JB |
1853 | /* do not receive anything via |
1854 | * master device when not scanning */ | |
1855 | return 0; | |
1856 | break; | |
1857 | case IEEE80211_IF_TYPE_WDS: | |
1858 | if (bssid || | |
1859 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) | |
1860 | return 0; | |
1861 | if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2)) | |
1862 | return 0; | |
1863 | break; | |
fb1c1cd6 JB |
1864 | case IEEE80211_IF_TYPE_MNTR: |
1865 | /* take everything */ | |
1866 | break; | |
a2897552 | 1867 | case IEEE80211_IF_TYPE_INVALID: |
fb1c1cd6 JB |
1868 | /* should never get here */ |
1869 | WARN_ON(1); | |
1870 | break; | |
23a24def JB |
1871 | } |
1872 | ||
1873 | return 1; | |
1874 | } | |
1875 | ||
571ecf67 | 1876 | /* |
6368e4b1 RR |
1877 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
1878 | * be called with rcu_read_lock protection. | |
571ecf67 | 1879 | */ |
71ebb4aa RR |
1880 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
1881 | struct sk_buff *skb, | |
1882 | struct ieee80211_rx_status *status, | |
8318d78a JB |
1883 | u32 load, |
1884 | struct ieee80211_rate *rate) | |
571ecf67 JB |
1885 | { |
1886 | struct ieee80211_local *local = hw_to_local(hw); | |
1887 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 JB |
1888 | struct ieee80211_hdr *hdr; |
1889 | struct ieee80211_txrx_data rx; | |
1890 | u16 type; | |
6368e4b1 | 1891 | int prepares; |
8e6f0032 JB |
1892 | struct ieee80211_sub_if_data *prev = NULL; |
1893 | struct sk_buff *skb_new; | |
1894 | u8 *bssid; | |
571ecf67 JB |
1895 | |
1896 | hdr = (struct ieee80211_hdr *) skb->data; | |
1897 | memset(&rx, 0, sizeof(rx)); | |
1898 | rx.skb = skb; | |
1899 | rx.local = local; | |
1900 | ||
1901 | rx.u.rx.status = status; | |
6368e4b1 | 1902 | rx.u.rx.load = load; |
8318d78a | 1903 | rx.u.rx.rate = rate; |
b2e7771e | 1904 | rx.fc = le16_to_cpu(hdr->frame_control); |
571ecf67 | 1905 | type = rx.fc & IEEE80211_FCTL_FTYPE; |
72abd81b | 1906 | |
b2e7771e | 1907 | if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT) |
571ecf67 | 1908 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 1909 | |
8944b79f JB |
1910 | rx.sta = sta_info_get(local, hdr->addr2); |
1911 | if (rx.sta) { | |
b2e7771e JB |
1912 | rx.dev = rx.sta->dev; |
1913 | rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev); | |
1914 | } | |
571ecf67 | 1915 | |
571ecf67 | 1916 | if ((status->flag & RX_FLAG_MMIC_ERROR)) { |
8944b79f | 1917 | ieee80211_rx_michael_mic_report(local->mdev, hdr, &rx); |
571ecf67 JB |
1918 | goto end; |
1919 | } | |
1920 | ||
ece8eddd | 1921 | if (unlikely(local->sta_sw_scanning || local->sta_hw_scanning)) |
badffb72 | 1922 | rx.flags |= IEEE80211_TXRXD_RXIN_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); |
b2e7771e | 1937 | rx.flags |= IEEE80211_TXRXD_RXRA_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 " | |
1963 | "multicast frame for %s", | |
dd1cd4c6 JB |
1964 | wiphy_name(local->hw.wiphy), |
1965 | prev->dev->name); | |
340e11f3 JB |
1966 | continue; |
1967 | } | |
69f817b6 | 1968 | rx.fc = le16_to_cpu(hdr->frame_control); |
8944b79f | 1969 | ieee80211_invoke_rx_handlers(prev, &rx, skb_new); |
8e6f0032 | 1970 | prev = sdata; |
571ecf67 | 1971 | } |
8e6f0032 | 1972 | if (prev) { |
69f817b6 | 1973 | rx.fc = le16_to_cpu(hdr->frame_control); |
8944b79f | 1974 | ieee80211_invoke_rx_handlers(prev, &rx, skb); |
8e6f0032 JB |
1975 | } else |
1976 | dev_kfree_skb(skb); | |
571ecf67 | 1977 | |
8e6f0032 | 1978 | end: |
8944b79f JB |
1979 | if (rx.sta) |
1980 | sta_info_put(rx.sta); | |
571ecf67 | 1981 | } |
6368e4b1 | 1982 | |
b580781e RR |
1983 | #define SEQ_MODULO 0x1000 |
1984 | #define SEQ_MASK 0xfff | |
1985 | ||
1986 | static inline int seq_less(u16 sq1, u16 sq2) | |
1987 | { | |
1988 | return (((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1)); | |
1989 | } | |
1990 | ||
1991 | static inline u16 seq_inc(u16 sq) | |
1992 | { | |
1993 | return ((sq + 1) & SEQ_MASK); | |
1994 | } | |
1995 | ||
1996 | static inline u16 seq_sub(u16 sq1, u16 sq2) | |
1997 | { | |
1998 | return ((sq1 - sq2) & SEQ_MASK); | |
1999 | } | |
2000 | ||
2001 | ||
71364716 RR |
2002 | /* |
2003 | * As it function blongs to Rx path it must be called with | |
2004 | * the proper rcu_read_lock protection for its flow. | |
2005 | */ | |
b580781e RR |
2006 | u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, |
2007 | struct tid_ampdu_rx *tid_agg_rx, | |
2008 | struct sk_buff *skb, u16 mpdu_seq_num, | |
2009 | int bar_req) | |
2010 | { | |
2011 | struct ieee80211_local *local = hw_to_local(hw); | |
2012 | struct ieee80211_rx_status status; | |
2013 | u16 head_seq_num, buf_size; | |
2014 | int index; | |
2015 | u32 pkt_load; | |
8318d78a JB |
2016 | struct ieee80211_supported_band *sband; |
2017 | struct ieee80211_rate *rate; | |
b580781e RR |
2018 | |
2019 | buf_size = tid_agg_rx->buf_size; | |
2020 | head_seq_num = tid_agg_rx->head_seq_num; | |
2021 | ||
2022 | /* frame with out of date sequence number */ | |
2023 | if (seq_less(mpdu_seq_num, head_seq_num)) { | |
2024 | dev_kfree_skb(skb); | |
2025 | return 1; | |
2026 | } | |
2027 | ||
2028 | /* if frame sequence number exceeds our buffering window size or | |
2029 | * block Ack Request arrived - release stored frames */ | |
2030 | if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) { | |
2031 | /* new head to the ordering buffer */ | |
2032 | if (bar_req) | |
2033 | head_seq_num = mpdu_seq_num; | |
2034 | else | |
2035 | head_seq_num = | |
2036 | seq_inc(seq_sub(mpdu_seq_num, buf_size)); | |
2037 | /* release stored frames up to new head to stack */ | |
2038 | while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) { | |
2039 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2040 | tid_agg_rx->ssn) | |
2041 | % tid_agg_rx->buf_size; | |
2042 | ||
2043 | if (tid_agg_rx->reorder_buf[index]) { | |
2044 | /* release the reordered frames to stack */ | |
2045 | memcpy(&status, | |
2046 | tid_agg_rx->reorder_buf[index]->cb, | |
2047 | sizeof(status)); | |
8318d78a JB |
2048 | sband = local->hw.wiphy->bands[status.band]; |
2049 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e RR |
2050 | pkt_load = ieee80211_rx_load_stats(local, |
2051 | tid_agg_rx->reorder_buf[index], | |
8318d78a | 2052 | &status, rate); |
b580781e RR |
2053 | __ieee80211_rx_handle_packet(hw, |
2054 | tid_agg_rx->reorder_buf[index], | |
8318d78a | 2055 | &status, pkt_load, rate); |
b580781e RR |
2056 | tid_agg_rx->stored_mpdu_num--; |
2057 | tid_agg_rx->reorder_buf[index] = NULL; | |
2058 | } | |
2059 | tid_agg_rx->head_seq_num = | |
2060 | seq_inc(tid_agg_rx->head_seq_num); | |
2061 | } | |
2062 | if (bar_req) | |
2063 | return 1; | |
2064 | } | |
2065 | ||
2066 | /* now the new frame is always in the range of the reordering */ | |
2067 | /* buffer window */ | |
2068 | index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) | |
2069 | % tid_agg_rx->buf_size; | |
2070 | /* check if we already stored this frame */ | |
2071 | if (tid_agg_rx->reorder_buf[index]) { | |
2072 | dev_kfree_skb(skb); | |
2073 | return 1; | |
2074 | } | |
2075 | ||
2076 | /* if arrived mpdu is in the right order and nothing else stored */ | |
2077 | /* release it immediately */ | |
2078 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
2079 | tid_agg_rx->stored_mpdu_num == 0) { | |
2080 | tid_agg_rx->head_seq_num = | |
2081 | seq_inc(tid_agg_rx->head_seq_num); | |
2082 | return 0; | |
2083 | } | |
2084 | ||
2085 | /* put the frame in the reordering buffer */ | |
2086 | tid_agg_rx->reorder_buf[index] = skb; | |
2087 | tid_agg_rx->stored_mpdu_num++; | |
2088 | /* release the buffer until next missing frame */ | |
2089 | index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) | |
2090 | % tid_agg_rx->buf_size; | |
2091 | while (tid_agg_rx->reorder_buf[index]) { | |
2092 | /* release the reordered frame back to stack */ | |
2093 | memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, | |
2094 | sizeof(status)); | |
8318d78a JB |
2095 | sband = local->hw.wiphy->bands[status.band]; |
2096 | rate = &sband->bitrates[status.rate_idx]; | |
b580781e RR |
2097 | pkt_load = ieee80211_rx_load_stats(local, |
2098 | tid_agg_rx->reorder_buf[index], | |
8318d78a | 2099 | &status, rate); |
b580781e | 2100 | __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index], |
8318d78a | 2101 | &status, pkt_load, rate); |
b580781e RR |
2102 | tid_agg_rx->stored_mpdu_num--; |
2103 | tid_agg_rx->reorder_buf[index] = NULL; | |
2104 | tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); | |
2105 | index = seq_sub(tid_agg_rx->head_seq_num, | |
2106 | tid_agg_rx->ssn) % tid_agg_rx->buf_size; | |
2107 | } | |
2108 | return 1; | |
2109 | } | |
2110 | ||
71ebb4aa RR |
2111 | static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local, |
2112 | struct sk_buff *skb) | |
b580781e RR |
2113 | { |
2114 | struct ieee80211_hw *hw = &local->hw; | |
2115 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2116 | struct sta_info *sta; | |
2117 | struct tid_ampdu_rx *tid_agg_rx; | |
2118 | u16 fc, sc; | |
2119 | u16 mpdu_seq_num; | |
2120 | u8 ret = 0, *qc; | |
2121 | int tid; | |
2122 | ||
2123 | sta = sta_info_get(local, hdr->addr2); | |
2124 | if (!sta) | |
2125 | return ret; | |
2126 | ||
2127 | fc = le16_to_cpu(hdr->frame_control); | |
2128 | ||
2129 | /* filter the QoS data rx stream according to | |
2130 | * STA/TID and check if this STA/TID is on aggregation */ | |
2131 | if (!WLAN_FC_IS_QOS_DATA(fc)) | |
2132 | goto end_reorder; | |
2133 | ||
2134 | qc = skb->data + ieee80211_get_hdrlen(fc) - QOS_CONTROL_LEN; | |
2135 | tid = qc[0] & QOS_CONTROL_TID_MASK; | |
2136 | tid_agg_rx = &(sta->ampdu_mlme.tid_rx[tid]); | |
2137 | ||
2138 | if (tid_agg_rx->state != HT_AGG_STATE_OPERATIONAL) | |
2139 | goto end_reorder; | |
2140 | ||
2141 | /* null data frames are excluded */ | |
8b6bbe75 | 2142 | if (unlikely(fc & IEEE80211_STYPE_NULLFUNC)) |
b580781e RR |
2143 | goto end_reorder; |
2144 | ||
2145 | /* new un-ordered ampdu frame - process it */ | |
2146 | ||
2147 | /* reset session timer */ | |
2148 | if (tid_agg_rx->timeout) { | |
2149 | unsigned long expires = | |
2150 | jiffies + (tid_agg_rx->timeout / 1000) * HZ; | |
2151 | mod_timer(&tid_agg_rx->session_timer, expires); | |
2152 | } | |
2153 | ||
2154 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
2155 | sc = le16_to_cpu(hdr->seq_ctrl); | |
2156 | if (sc & IEEE80211_SCTL_FRAG) { | |
2157 | ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, | |
2158 | tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP); | |
2159 | ret = 1; | |
2160 | goto end_reorder; | |
2161 | } | |
2162 | ||
2163 | /* according to mpdu sequence number deal with reordering buffer */ | |
2164 | mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
2165 | ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, | |
2166 | mpdu_seq_num, 0); | |
2167 | end_reorder: | |
2168 | if (sta) | |
2169 | sta_info_put(sta); | |
2170 | return ret; | |
2171 | } | |
2172 | ||
6368e4b1 RR |
2173 | /* |
2174 | * This is the receive path handler. It is called by a low level driver when an | |
2175 | * 802.11 MPDU is received from the hardware. | |
2176 | */ | |
2177 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2178 | struct ieee80211_rx_status *status) | |
2179 | { | |
2180 | struct ieee80211_local *local = hw_to_local(hw); | |
2181 | u32 pkt_load; | |
8318d78a JB |
2182 | struct ieee80211_rate *rate = NULL; |
2183 | struct ieee80211_supported_band *sband; | |
2184 | ||
2185 | if (status->band < 0 || | |
2186 | status->band > IEEE80211_NUM_BANDS) { | |
2187 | WARN_ON(1); | |
2188 | return; | |
2189 | } | |
2190 | ||
2191 | sband = local->hw.wiphy->bands[status->band]; | |
2192 | ||
2193 | if (!sband || | |
2194 | status->rate_idx < 0 || | |
2195 | status->rate_idx >= sband->n_bitrates) { | |
2196 | WARN_ON(1); | |
2197 | return; | |
2198 | } | |
2199 | ||
2200 | rate = &sband->bitrates[status->rate_idx]; | |
6368e4b1 RR |
2201 | |
2202 | /* | |
2203 | * key references and virtual interfaces are protected using RCU | |
2204 | * and this requires that we are in a read-side RCU section during | |
2205 | * receive processing | |
2206 | */ | |
2207 | rcu_read_lock(); | |
2208 | ||
2209 | /* | |
2210 | * Frames with failed FCS/PLCP checksum are not returned, | |
2211 | * all other frames are returned without radiotap header | |
2212 | * if it was previously present. | |
2213 | * Also, frames with less than 16 bytes are dropped. | |
2214 | */ | |
8318d78a | 2215 | skb = ieee80211_rx_monitor(local, skb, status, rate); |
6368e4b1 RR |
2216 | if (!skb) { |
2217 | rcu_read_unlock(); | |
2218 | return; | |
2219 | } | |
2220 | ||
8318d78a | 2221 | pkt_load = ieee80211_rx_load_stats(local, skb, status, rate); |
b580781e | 2222 | local->channel_use_raw += pkt_load; |
6368e4b1 | 2223 | |
b580781e | 2224 | if (!ieee80211_rx_reorder_ampdu(local, skb)) |
8318d78a | 2225 | __ieee80211_rx_handle_packet(hw, skb, status, pkt_load, rate); |
6368e4b1 RR |
2226 | |
2227 | rcu_read_unlock(); | |
2228 | } | |
571ecf67 JB |
2229 | EXPORT_SYMBOL(__ieee80211_rx); |
2230 | ||
2231 | /* This is a version of the rx handler that can be called from hard irq | |
2232 | * context. Post the skb on the queue and schedule the tasklet */ | |
2233 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, | |
2234 | struct ieee80211_rx_status *status) | |
2235 | { | |
2236 | struct ieee80211_local *local = hw_to_local(hw); | |
2237 | ||
2238 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
2239 | ||
2240 | skb->dev = local->mdev; | |
2241 | /* copy status into skb->cb for use by tasklet */ | |
2242 | memcpy(skb->cb, status, sizeof(*status)); | |
2243 | skb->pkt_type = IEEE80211_RX_MSG; | |
2244 | skb_queue_tail(&local->skb_queue, skb); | |
2245 | tasklet_schedule(&local->tasklet); | |
2246 | } | |
2247 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |