Commit | Line | Data |
---|---|---|
b453872c JG |
1 | /* |
2 | * Original code based Host AP (software wireless LAN access point) driver | |
3 | * for Intersil Prism2/2.5/3 - hostap.o module, common routines | |
4 | * | |
5 | * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen | |
85d32e7b JM |
6 | * <j@w1.fi> |
7 | * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> | |
ebeaddcc | 8 | * Copyright (c) 2004-2005, Intel Corporation |
b453872c JG |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. See README and COPYING for | |
13 | * more details. | |
14 | */ | |
15 | ||
16 | #include <linux/compiler.h> | |
b453872c JG |
17 | #include <linux/errno.h> |
18 | #include <linux/if_arp.h> | |
19 | #include <linux/in6.h> | |
20 | #include <linux/in.h> | |
21 | #include <linux/ip.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/netdevice.h> | |
b453872c JG |
25 | #include <linux/proc_fs.h> |
26 | #include <linux/skbuff.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/tcp.h> | |
29 | #include <linux/types.h> | |
b453872c JG |
30 | #include <linux/wireless.h> |
31 | #include <linux/etherdevice.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include <linux/ctype.h> | |
34 | ||
35 | #include <net/ieee80211.h> | |
36 | ||
858119e1 | 37 | static void ieee80211_monitor_rx(struct ieee80211_device *ieee, |
b453872c JG |
38 | struct sk_buff *skb, |
39 | struct ieee80211_rx_stats *rx_stats) | |
40 | { | |
41 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
42 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
43 | ||
44 | skb->dev = ieee->dev; | |
459a98ed | 45 | skb_reset_mac_header(skb); |
b453872c JG |
46 | skb_pull(skb, ieee80211_get_hdrlen(fc)); |
47 | skb->pkt_type = PACKET_OTHERHOST; | |
4e39430a | 48 | skb->protocol = htons(ETH_P_80211_RAW); |
b453872c JG |
49 | memset(skb->cb, 0, sizeof(skb->cb)); |
50 | netif_rx(skb); | |
51 | } | |
52 | ||
b453872c | 53 | /* Called only as a tasklet (software IRQ) */ |
0edd5b44 JG |
54 | static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct |
55 | ieee80211_device | |
56 | *ieee, | |
57 | unsigned int seq, | |
58 | unsigned int frag, | |
59 | u8 * src, | |
60 | u8 * dst) | |
b453872c JG |
61 | { |
62 | struct ieee80211_frag_entry *entry; | |
63 | int i; | |
64 | ||
65 | for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { | |
66 | entry = &ieee->frag_cache[i]; | |
67 | if (entry->skb != NULL && | |
68 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { | |
0edd5b44 JG |
69 | IEEE80211_DEBUG_FRAG("expiring fragment cache entry " |
70 | "seq=%u last_frag=%u\n", | |
71 | entry->seq, entry->last_frag); | |
b453872c JG |
72 | dev_kfree_skb_any(entry->skb); |
73 | entry->skb = NULL; | |
74 | } | |
75 | ||
76 | if (entry->skb != NULL && entry->seq == seq && | |
77 | (entry->last_frag + 1 == frag || frag == -1) && | |
d3f4a687 KK |
78 | !compare_ether_addr(entry->src_addr, src) && |
79 | !compare_ether_addr(entry->dst_addr, dst)) | |
b453872c JG |
80 | return entry; |
81 | } | |
82 | ||
83 | return NULL; | |
84 | } | |
85 | ||
86 | /* Called only as a tasklet (software IRQ) */ | |
0edd5b44 | 87 | static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee, |
ee34af37 | 88 | struct ieee80211_hdr_4addr *hdr) |
b453872c JG |
89 | { |
90 | struct sk_buff *skb = NULL; | |
91 | u16 sc; | |
92 | unsigned int frag, seq; | |
93 | struct ieee80211_frag_entry *entry; | |
94 | ||
95 | sc = le16_to_cpu(hdr->seq_ctl); | |
96 | frag = WLAN_GET_SEQ_FRAG(sc); | |
97 | seq = WLAN_GET_SEQ_SEQ(sc); | |
98 | ||
99 | if (frag == 0) { | |
100 | /* Reserve enough space to fit maximum frame length */ | |
101 | skb = dev_alloc_skb(ieee->dev->mtu + | |
ee34af37 | 102 | sizeof(struct ieee80211_hdr_4addr) + |
0edd5b44 JG |
103 | 8 /* LLC */ + |
104 | 2 /* alignment */ + | |
105 | 8 /* WEP */ + ETH_ALEN /* WDS */ ); | |
b453872c JG |
106 | if (skb == NULL) |
107 | return NULL; | |
108 | ||
109 | entry = &ieee->frag_cache[ieee->frag_next_idx]; | |
110 | ieee->frag_next_idx++; | |
111 | if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN) | |
112 | ieee->frag_next_idx = 0; | |
113 | ||
114 | if (entry->skb != NULL) | |
115 | dev_kfree_skb_any(entry->skb); | |
116 | ||
117 | entry->first_frag_time = jiffies; | |
118 | entry->seq = seq; | |
119 | entry->last_frag = frag; | |
120 | entry->skb = skb; | |
121 | memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); | |
122 | memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); | |
123 | } else { | |
124 | /* received a fragment of a frame for which the head fragment | |
125 | * should have already been received */ | |
126 | entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2, | |
127 | hdr->addr1); | |
128 | if (entry != NULL) { | |
129 | entry->last_frag = frag; | |
130 | skb = entry->skb; | |
131 | } | |
132 | } | |
133 | ||
134 | return skb; | |
135 | } | |
136 | ||
b453872c JG |
137 | /* Called only as a tasklet (software IRQ) */ |
138 | static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, | |
ee34af37 | 139 | struct ieee80211_hdr_4addr *hdr) |
b453872c JG |
140 | { |
141 | u16 sc; | |
142 | unsigned int seq; | |
143 | struct ieee80211_frag_entry *entry; | |
144 | ||
145 | sc = le16_to_cpu(hdr->seq_ctl); | |
146 | seq = WLAN_GET_SEQ_SEQ(sc); | |
147 | ||
148 | entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2, | |
149 | hdr->addr1); | |
150 | ||
151 | if (entry == NULL) { | |
0edd5b44 JG |
152 | IEEE80211_DEBUG_FRAG("could not invalidate fragment cache " |
153 | "entry (seq=%u)\n", seq); | |
b453872c JG |
154 | return -1; |
155 | } | |
156 | ||
157 | entry->skb = NULL; | |
158 | return 0; | |
159 | } | |
160 | ||
b453872c JG |
161 | #ifdef NOT_YET |
162 | /* ieee80211_rx_frame_mgtmt | |
163 | * | |
164 | * Responsible for handling management control frames | |
165 | * | |
166 | * Called by ieee80211_rx */ | |
858119e1 | 167 | static int |
b453872c JG |
168 | ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, |
169 | struct ieee80211_rx_stats *rx_stats, u16 type, | |
170 | u16 stype) | |
171 | { | |
172 | if (ieee->iw_mode == IW_MODE_MASTER) { | |
173 | printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", | |
174 | ieee->dev->name); | |
175 | return 0; | |
176 | /* | |
ee34af37 | 177 | hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *) |
b453872c JG |
178 | skb->data);*/ |
179 | } | |
180 | ||
181 | if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) { | |
182 | if (stype == WLAN_FC_STYPE_BEACON && | |
183 | ieee->iw_mode == IW_MODE_MASTER) { | |
184 | struct sk_buff *skb2; | |
185 | /* Process beacon frames also in kernel driver to | |
186 | * update STA(AP) table statistics */ | |
187 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
188 | if (skb2) | |
189 | hostap_rx(skb2->dev, skb2, rx_stats); | |
190 | } | |
191 | ||
192 | /* send management frames to the user space daemon for | |
193 | * processing */ | |
194 | ieee->apdevstats.rx_packets++; | |
195 | ieee->apdevstats.rx_bytes += skb->len; | |
196 | prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); | |
197 | return 0; | |
198 | } | |
199 | ||
0edd5b44 | 200 | if (ieee->iw_mode == IW_MODE_MASTER) { |
b453872c JG |
201 | if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { |
202 | printk(KERN_DEBUG "%s: unknown management frame " | |
203 | "(type=0x%02x, stype=0x%02x) dropped\n", | |
204 | skb->dev->name, type, stype); | |
205 | return -1; | |
206 | } | |
207 | ||
208 | hostap_rx(skb->dev, skb, rx_stats); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " | |
213 | "received in non-Host AP mode\n", skb->dev->name); | |
214 | return -1; | |
215 | } | |
216 | #endif | |
217 | ||
b453872c JG |
218 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
219 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
0edd5b44 JG |
220 | static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
221 | ||
b453872c JG |
222 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
223 | static unsigned char bridge_tunnel_header[] = | |
0edd5b44 | 224 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
b453872c JG |
225 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
226 | ||
227 | /* Called by ieee80211_rx_frame_decrypt */ | |
228 | static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, | |
229 | struct sk_buff *skb) | |
230 | { | |
231 | struct net_device *dev = ieee->dev; | |
232 | u16 fc, ethertype; | |
ee34af37 | 233 | struct ieee80211_hdr_3addr *hdr; |
b453872c JG |
234 | u8 *pos; |
235 | ||
236 | if (skb->len < 24) | |
237 | return 0; | |
238 | ||
ee34af37 | 239 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
b453872c JG |
240 | fc = le16_to_cpu(hdr->frame_ctl); |
241 | ||
242 | /* check that the frame is unicast frame to us */ | |
243 | if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == | |
244 | IEEE80211_FCTL_TODS && | |
d3f4a687 KK |
245 | !compare_ether_addr(hdr->addr1, dev->dev_addr) && |
246 | !compare_ether_addr(hdr->addr3, dev->dev_addr)) { | |
b453872c JG |
247 | /* ToDS frame with own addr BSSID and DA */ |
248 | } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == | |
249 | IEEE80211_FCTL_FROMDS && | |
d3f4a687 | 250 | !compare_ether_addr(hdr->addr1, dev->dev_addr)) { |
b453872c JG |
251 | /* FromDS frame with own addr as DA */ |
252 | } else | |
253 | return 0; | |
254 | ||
255 | if (skb->len < 24 + 8) | |
256 | return 0; | |
257 | ||
258 | /* check for port access entity Ethernet type */ | |
259 | pos = skb->data + 24; | |
260 | ethertype = (pos[6] << 8) | pos[7]; | |
261 | if (ethertype == ETH_P_PAE) | |
262 | return 1; | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ | |
858119e1 | 268 | static int |
0edd5b44 | 269 | ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, |
b453872c JG |
270 | struct ieee80211_crypt_data *crypt) |
271 | { | |
ee34af37 | 272 | struct ieee80211_hdr_3addr *hdr; |
b453872c JG |
273 | int res, hdrlen; |
274 | ||
275 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) | |
276 | return 0; | |
277 | ||
ee34af37 | 278 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
b453872c JG |
279 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
280 | ||
b453872c JG |
281 | atomic_inc(&crypt->refcnt); |
282 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); | |
283 | atomic_dec(&crypt->refcnt); | |
284 | if (res < 0) { | |
21f644f3 DM |
285 | IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT |
286 | ") res=%d\n", | |
287 | hdr->addr2[0], hdr->addr2[1], | |
288 | hdr->addr2[2], hdr->addr2[3], | |
289 | hdr->addr2[4], hdr->addr2[5], | |
290 | res); | |
b453872c JG |
291 | if (res == -2) |
292 | IEEE80211_DEBUG_DROP("Decryption failed ICV " | |
293 | "mismatch (key %d)\n", | |
294 | skb->data[hdrlen + 3] >> 6); | |
295 | ieee->ieee_stats.rx_discards_undecryptable++; | |
296 | return -1; | |
297 | } | |
298 | ||
299 | return res; | |
300 | } | |
301 | ||
b453872c | 302 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
858119e1 | 303 | static int |
0edd5b44 JG |
304 | ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, |
305 | struct sk_buff *skb, int keyidx, | |
306 | struct ieee80211_crypt_data *crypt) | |
b453872c | 307 | { |
ee34af37 | 308 | struct ieee80211_hdr_3addr *hdr; |
b453872c JG |
309 | int res, hdrlen; |
310 | ||
311 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) | |
312 | return 0; | |
313 | ||
ee34af37 | 314 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
b453872c JG |
315 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
316 | ||
317 | atomic_inc(&crypt->refcnt); | |
318 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); | |
319 | atomic_dec(&crypt->refcnt); | |
320 | if (res < 0) { | |
321 | printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" | |
21f644f3 DM |
322 | " (SA=" MAC_FMT " keyidx=%d)\n", |
323 | ieee->dev->name, | |
324 | hdr->addr2[0], hdr->addr2[1], | |
325 | hdr->addr2[2], hdr->addr2[3], | |
326 | hdr->addr2[4], hdr->addr2[5], | |
327 | keyidx); | |
b453872c JG |
328 | return -1; |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
b453872c JG |
334 | /* All received frames are sent to this function. @skb contains the frame in |
335 | * IEEE 802.11 format, i.e., in the format it was sent over air. | |
336 | * This function is called only as a tasklet (software IRQ). */ | |
337 | int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, | |
338 | struct ieee80211_rx_stats *rx_stats) | |
339 | { | |
340 | struct net_device *dev = ieee->dev; | |
ee34af37 | 341 | struct ieee80211_hdr_4addr *hdr; |
b453872c JG |
342 | size_t hdrlen; |
343 | u16 fc, type, stype, sc; | |
344 | struct net_device_stats *stats; | |
345 | unsigned int frag; | |
346 | u8 *payload; | |
347 | u16 ethertype; | |
348 | #ifdef NOT_YET | |
349 | struct net_device *wds = NULL; | |
350 | struct sk_buff *skb2 = NULL; | |
351 | struct net_device *wds = NULL; | |
352 | int frame_authorized = 0; | |
353 | int from_assoc_ap = 0; | |
354 | void *sta = NULL; | |
355 | #endif | |
356 | u8 dst[ETH_ALEN]; | |
357 | u8 src[ETH_ALEN]; | |
358 | struct ieee80211_crypt_data *crypt = NULL; | |
359 | int keyidx = 0; | |
b6daa25d | 360 | int can_be_decrypted = 0; |
0795af57 | 361 | DECLARE_MAC_BUF(mac); |
b453872c | 362 | |
ee34af37 | 363 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
b453872c JG |
364 | stats = &ieee->stats; |
365 | ||
366 | if (skb->len < 10) { | |
0edd5b44 | 367 | printk(KERN_INFO "%s: SKB length < 10\n", dev->name); |
b453872c JG |
368 | goto rx_dropped; |
369 | } | |
370 | ||
371 | fc = le16_to_cpu(hdr->frame_ctl); | |
372 | type = WLAN_FC_GET_TYPE(fc); | |
373 | stype = WLAN_FC_GET_STYPE(fc); | |
374 | sc = le16_to_cpu(hdr->seq_ctl); | |
375 | frag = WLAN_GET_SEQ_FRAG(sc); | |
376 | hdrlen = ieee80211_get_hdrlen(fc); | |
377 | ||
04045f98 JL |
378 | if (skb->len < hdrlen) { |
379 | printk(KERN_INFO "%s: invalid SKB length %d\n", | |
380 | dev->name, skb->len); | |
381 | goto rx_dropped; | |
382 | } | |
383 | ||
b453872c JG |
384 | /* Put this code here so that we avoid duplicating it in all |
385 | * Rx paths. - Jean II */ | |
8f7eb407 | 386 | #ifdef CONFIG_WIRELESS_EXT |
b453872c JG |
387 | #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ |
388 | /* If spy monitoring on */ | |
74079fdc | 389 | if (ieee->spy_data.spy_number > 0) { |
b453872c | 390 | struct iw_quality wstats; |
74079fdc JK |
391 | |
392 | wstats.updated = 0; | |
393 | if (rx_stats->mask & IEEE80211_STATMASK_RSSI) { | |
394 | wstats.level = rx_stats->rssi; | |
395 | wstats.updated |= IW_QUAL_LEVEL_UPDATED; | |
396 | } else | |
397 | wstats.updated |= IW_QUAL_LEVEL_INVALID; | |
398 | ||
399 | if (rx_stats->mask & IEEE80211_STATMASK_NOISE) { | |
400 | wstats.noise = rx_stats->noise; | |
401 | wstats.updated |= IW_QUAL_NOISE_UPDATED; | |
402 | } else | |
403 | wstats.updated |= IW_QUAL_NOISE_INVALID; | |
404 | ||
405 | if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) { | |
406 | wstats.qual = rx_stats->signal; | |
407 | wstats.updated |= IW_QUAL_QUAL_UPDATED; | |
408 | } else | |
409 | wstats.updated |= IW_QUAL_QUAL_INVALID; | |
410 | ||
b453872c | 411 | /* Update spy records */ |
74079fdc | 412 | wireless_spy_update(ieee->dev, hdr->addr2, &wstats); |
b453872c | 413 | } |
0edd5b44 | 414 | #endif /* IW_WIRELESS_SPY */ |
8f7eb407 | 415 | #endif /* CONFIG_WIRELESS_EXT */ |
74079fdc JK |
416 | |
417 | #ifdef NOT_YET | |
b453872c JG |
418 | hostap_update_rx_stats(local->ap, hdr, rx_stats); |
419 | #endif | |
420 | ||
b453872c | 421 | if (ieee->iw_mode == IW_MODE_MONITOR) { |
b453872c JG |
422 | stats->rx_packets++; |
423 | stats->rx_bytes += skb->len; | |
60d48f1e | 424 | ieee80211_monitor_rx(ieee, skb, rx_stats); |
b453872c JG |
425 | return 1; |
426 | } | |
b453872c | 427 | |
b6daa25d ZY |
428 | can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) || |
429 | is_broadcast_ether_addr(hdr->addr2)) ? | |
430 | ieee->host_mc_decrypt : ieee->host_decrypt; | |
431 | ||
432 | if (can_be_decrypted) { | |
b6daa25d ZY |
433 | if (skb->len >= hdrlen + 3) { |
434 | /* Top two-bits of byte 3 are the key index */ | |
c9308b06 | 435 | keyidx = skb->data[hdrlen + 3] >> 6; |
b6daa25d ZY |
436 | } |
437 | ||
c9308b06 DD |
438 | /* ieee->crypt[] is WEP_KEY (4) in length. Given that keyidx |
439 | * is only allowed 2-bits of storage, no value of keyidx can | |
440 | * be provided via above code that would result in keyidx | |
b6daa25d | 441 | * being out of range */ |
c9308b06 | 442 | crypt = ieee->crypt[keyidx]; |
b6daa25d | 443 | |
b453872c JG |
444 | #ifdef NOT_YET |
445 | sta = NULL; | |
446 | ||
447 | /* Use station specific key to override default keys if the | |
448 | * receiver address is a unicast address ("individual RA"). If | |
449 | * bcrx_sta_key parameter is set, station specific key is used | |
450 | * even with broad/multicast targets (this is against IEEE | |
451 | * 802.11, but makes it easier to use different keys with | |
452 | * stations that do not support WEP key mapping). */ | |
453 | ||
454 | if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) | |
0edd5b44 JG |
455 | (void)hostap_handle_sta_crypto(local, hdr, &crypt, |
456 | &sta); | |
b453872c JG |
457 | #endif |
458 | ||
459 | /* allow NULL decrypt to indicate an station specific override | |
460 | * for default encryption */ | |
461 | if (crypt && (crypt->ops == NULL || | |
462 | crypt->ops->decrypt_mpdu == NULL)) | |
463 | crypt = NULL; | |
464 | ||
f13baae4 | 465 | if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) { |
b453872c JG |
466 | /* This seems to be triggered by some (multicast?) |
467 | * frames from other than current BSS, so just drop the | |
468 | * frames silently instead of filling system log with | |
469 | * these reports. */ | |
470 | IEEE80211_DEBUG_DROP("Decryption failed (not set)" | |
21f644f3 DM |
471 | " (SA=" MAC_FMT ")\n", |
472 | hdr->addr2[0], hdr->addr2[1], | |
473 | hdr->addr2[2], hdr->addr2[3], | |
474 | hdr->addr2[4], hdr->addr2[5]); | |
b453872c JG |
475 | ieee->ieee_stats.rx_discards_undecryptable++; |
476 | goto rx_dropped; | |
477 | } | |
478 | } | |
b453872c JG |
479 | #ifdef NOT_YET |
480 | if (type != WLAN_FC_TYPE_DATA) { | |
481 | if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH && | |
f13baae4 | 482 | fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt && |
0edd5b44 | 483 | (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) { |
b453872c | 484 | printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth " |
21f644f3 DM |
485 | "from " MAC_FMT "\n", dev->name, |
486 | hdr->addr2[0], hdr->addr2[1], | |
487 | hdr->addr2[2], hdr->addr2[3], | |
488 | hdr->addr2[4], hdr->addr2[5]); | |
b453872c JG |
489 | /* TODO: could inform hostapd about this so that it |
490 | * could send auth failure report */ | |
491 | goto rx_dropped; | |
492 | } | |
493 | ||
494 | if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) | |
495 | goto rx_dropped; | |
496 | else | |
497 | goto rx_exit; | |
498 | } | |
499 | #endif | |
837925df LF |
500 | /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */ |
501 | if (sc == ieee->prev_seq_ctl) | |
502 | goto rx_dropped; | |
503 | else | |
504 | ieee->prev_seq_ctl = sc; | |
b453872c JG |
505 | |
506 | /* Data frame - extract src/dst addresses */ | |
286d9747 | 507 | if (skb->len < IEEE80211_3ADDR_LEN) |
b453872c JG |
508 | goto rx_dropped; |
509 | ||
510 | switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { | |
511 | case IEEE80211_FCTL_FROMDS: | |
512 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
513 | memcpy(src, hdr->addr3, ETH_ALEN); | |
514 | break; | |
515 | case IEEE80211_FCTL_TODS: | |
516 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
517 | memcpy(src, hdr->addr2, ETH_ALEN); | |
518 | break; | |
519 | case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: | |
286d9747 | 520 | if (skb->len < IEEE80211_4ADDR_LEN) |
b453872c JG |
521 | goto rx_dropped; |
522 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
523 | memcpy(src, hdr->addr4, ETH_ALEN); | |
524 | break; | |
525 | case 0: | |
526 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
527 | memcpy(src, hdr->addr2, ETH_ALEN); | |
528 | break; | |
529 | } | |
530 | ||
531 | #ifdef NOT_YET | |
532 | if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) | |
533 | goto rx_dropped; | |
534 | if (wds) { | |
535 | skb->dev = dev = wds; | |
536 | stats = hostap_get_stats(dev); | |
537 | } | |
538 | ||
539 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && | |
0edd5b44 JG |
540 | (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
541 | IEEE80211_FCTL_FROMDS && ieee->stadev | |
d3f4a687 | 542 | && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) { |
b453872c JG |
543 | /* Frame from BSSID of the AP for which we are a client */ |
544 | skb->dev = dev = ieee->stadev; | |
545 | stats = hostap_get_stats(dev); | |
546 | from_assoc_ap = 1; | |
547 | } | |
548 | #endif | |
549 | ||
550 | dev->last_rx = jiffies; | |
551 | ||
552 | #ifdef NOT_YET | |
553 | if ((ieee->iw_mode == IW_MODE_MASTER || | |
0edd5b44 | 554 | ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) { |
b453872c JG |
555 | switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, |
556 | wds != NULL)) { | |
557 | case AP_RX_CONTINUE_NOT_AUTHORIZED: | |
558 | frame_authorized = 0; | |
559 | break; | |
560 | case AP_RX_CONTINUE: | |
561 | frame_authorized = 1; | |
562 | break; | |
563 | case AP_RX_DROP: | |
564 | goto rx_dropped; | |
565 | case AP_RX_EXIT: | |
566 | goto rx_exit; | |
567 | } | |
568 | } | |
569 | #endif | |
570 | ||
571 | /* Nullfunc frames may have PS-bit set, so they must be passed to | |
572 | * hostap_handle_sta_rx() before being dropped here. */ | |
9e8571af JK |
573 | |
574 | stype &= ~IEEE80211_STYPE_QOS_DATA; | |
575 | ||
b453872c JG |
576 | if (stype != IEEE80211_STYPE_DATA && |
577 | stype != IEEE80211_STYPE_DATA_CFACK && | |
578 | stype != IEEE80211_STYPE_DATA_CFPOLL && | |
579 | stype != IEEE80211_STYPE_DATA_CFACKPOLL) { | |
580 | if (stype != IEEE80211_STYPE_NULLFUNC) | |
0edd5b44 JG |
581 | IEEE80211_DEBUG_DROP("RX: dropped data frame " |
582 | "with no data (type=0x%02x, " | |
583 | "subtype=0x%02x, len=%d)\n", | |
584 | type, stype, skb->len); | |
b453872c JG |
585 | goto rx_dropped; |
586 | } | |
587 | ||
588 | /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ | |
589 | ||
b6daa25d | 590 | if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted && |
b453872c JG |
591 | (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) |
592 | goto rx_dropped; | |
593 | ||
ee34af37 | 594 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
b453872c JG |
595 | |
596 | /* skb: hdr + (possibly fragmented) plaintext payload */ | |
597 | // PR: FIXME: hostap has additional conditions in the "if" below: | |
f13baae4 | 598 | // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) && |
9eafe76b | 599 | if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) { |
b453872c JG |
600 | int flen; |
601 | struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); | |
602 | IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); | |
603 | ||
604 | if (!frag_skb) { | |
605 | IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, | |
606 | "Rx cannot get skb from fragment " | |
607 | "cache (morefrag=%d seq=%u frag=%u)\n", | |
608 | (fc & IEEE80211_FCTL_MOREFRAGS) != 0, | |
609 | WLAN_GET_SEQ_SEQ(sc), frag); | |
610 | goto rx_dropped; | |
611 | } | |
612 | ||
613 | flen = skb->len; | |
614 | if (frag != 0) | |
615 | flen -= hdrlen; | |
616 | ||
4305b541 | 617 | if (frag_skb->tail + flen > frag_skb->end) { |
b453872c JG |
618 | printk(KERN_WARNING "%s: host decrypted and " |
619 | "reassembled frame did not fit skb\n", | |
620 | dev->name); | |
621 | ieee80211_frag_cache_invalidate(ieee, hdr); | |
622 | goto rx_dropped; | |
623 | } | |
624 | ||
625 | if (frag == 0) { | |
626 | /* copy first fragment (including full headers) into | |
627 | * beginning of the fragment cache skb */ | |
d626f62b | 628 | skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen); |
b453872c JG |
629 | } else { |
630 | /* append frame payload to the end of the fragment | |
631 | * cache skb */ | |
d626f62b ACM |
632 | skb_copy_from_linear_data_offset(skb, hdrlen, |
633 | skb_put(frag_skb, flen), flen); | |
b453872c JG |
634 | } |
635 | dev_kfree_skb_any(skb); | |
636 | skb = NULL; | |
637 | ||
638 | if (fc & IEEE80211_FCTL_MOREFRAGS) { | |
639 | /* more fragments expected - leave the skb in fragment | |
640 | * cache for now; it will be delivered to upper layers | |
641 | * after all fragments have been received */ | |
642 | goto rx_exit; | |
643 | } | |
644 | ||
645 | /* this was the last fragment and the frame will be | |
646 | * delivered, so remove skb from fragment cache */ | |
647 | skb = frag_skb; | |
ee34af37 | 648 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
b453872c JG |
649 | ieee80211_frag_cache_invalidate(ieee, hdr); |
650 | } | |
651 | ||
652 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still | |
653 | * encrypted/authenticated */ | |
b6daa25d | 654 | if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted && |
b453872c JG |
655 | ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) |
656 | goto rx_dropped; | |
657 | ||
ee34af37 | 658 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
f13baae4 | 659 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) { |
0edd5b44 JG |
660 | if ( /*ieee->ieee802_1x && */ |
661 | ieee80211_is_eapol_frame(ieee, skb)) { | |
b453872c JG |
662 | /* pass unencrypted EAPOL frames even if encryption is |
663 | * configured */ | |
b453872c | 664 | } else { |
0edd5b44 | 665 | IEEE80211_DEBUG_DROP("encryption configured, but RX " |
21f644f3 DM |
666 | "frame not encrypted (SA=" |
667 | MAC_FMT ")\n", | |
668 | hdr->addr2[0], hdr->addr2[1], | |
669 | hdr->addr2[2], hdr->addr2[3], | |
670 | hdr->addr2[4], hdr->addr2[5]); | |
b453872c JG |
671 | goto rx_dropped; |
672 | } | |
673 | } | |
674 | ||
f13baae4 | 675 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep && |
b453872c | 676 | !ieee80211_is_eapol_frame(ieee, skb)) { |
0edd5b44 | 677 | IEEE80211_DEBUG_DROP("dropped unencrypted RX data " |
21f644f3 | 678 | "frame from " MAC_FMT |
0edd5b44 | 679 | " (drop_unencrypted=1)\n", |
21f644f3 DM |
680 | hdr->addr2[0], hdr->addr2[1], |
681 | hdr->addr2[2], hdr->addr2[3], | |
682 | hdr->addr2[4], hdr->addr2[5]); | |
b453872c JG |
683 | goto rx_dropped; |
684 | } | |
685 | ||
c9308b06 DD |
686 | /* If the frame was decrypted in hardware, we may need to strip off |
687 | * any security data (IV, ICV, etc) that was left behind */ | |
688 | if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) && | |
689 | ieee->host_strip_iv_icv) { | |
64265651 | 690 | int trimlen = 0; |
c9308b06 DD |
691 | |
692 | /* Top two-bits of byte 3 are the key index */ | |
693 | if (skb->len >= hdrlen + 3) | |
694 | keyidx = skb->data[hdrlen + 3] >> 6; | |
695 | ||
696 | /* To strip off any security data which appears before the | |
697 | * payload, we simply increase hdrlen (as the header gets | |
698 | * chopped off immediately below). For the security data which | |
699 | * appears after the payload, we use skb_trim. */ | |
700 | ||
701 | switch (ieee->sec.encode_alg[keyidx]) { | |
702 | case SEC_ALG_WEP: | |
703 | /* 4 byte IV */ | |
704 | hdrlen += 4; | |
705 | /* 4 byte ICV */ | |
706 | trimlen = 4; | |
707 | break; | |
708 | case SEC_ALG_TKIP: | |
709 | /* 4 byte IV, 4 byte ExtIV */ | |
710 | hdrlen += 8; | |
711 | /* 8 byte MIC, 4 byte ICV */ | |
712 | trimlen = 12; | |
713 | break; | |
714 | case SEC_ALG_CCMP: | |
715 | /* 8 byte CCMP header */ | |
716 | hdrlen += 8; | |
717 | /* 8 byte MIC */ | |
718 | trimlen = 8; | |
719 | break; | |
720 | } | |
721 | ||
722 | if (skb->len < trimlen) | |
723 | goto rx_dropped; | |
724 | ||
725 | __skb_trim(skb, skb->len - trimlen); | |
726 | ||
727 | if (skb->len < hdrlen) | |
728 | goto rx_dropped; | |
729 | } | |
730 | ||
b453872c JG |
731 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
732 | ||
733 | payload = skb->data + hdrlen; | |
734 | ethertype = (payload[6] << 8) | payload[7]; | |
735 | ||
736 | #ifdef NOT_YET | |
737 | /* If IEEE 802.1X is used, check whether the port is authorized to send | |
738 | * the received frame. */ | |
739 | if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) { | |
740 | if (ethertype == ETH_P_PAE) { | |
741 | printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n", | |
742 | dev->name); | |
743 | if (ieee->hostapd && ieee->apdev) { | |
744 | /* Send IEEE 802.1X frames to the user | |
745 | * space daemon for processing */ | |
746 | prism2_rx_80211(ieee->apdev, skb, rx_stats, | |
747 | PRISM2_RX_MGMT); | |
748 | ieee->apdevstats.rx_packets++; | |
749 | ieee->apdevstats.rx_bytes += skb->len; | |
750 | goto rx_exit; | |
751 | } | |
752 | } else if (!frame_authorized) { | |
753 | printk(KERN_DEBUG "%s: dropped frame from " | |
754 | "unauthorized port (IEEE 802.1X): " | |
0edd5b44 | 755 | "ethertype=0x%04x\n", dev->name, ethertype); |
b453872c JG |
756 | goto rx_dropped; |
757 | } | |
758 | } | |
759 | #endif | |
760 | ||
761 | /* convert hdr + possible LLC headers into Ethernet header */ | |
762 | if (skb->len - hdrlen >= 8 && | |
763 | ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 && | |
764 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
765 | memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) { | |
766 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
767 | * replace EtherType */ | |
768 | skb_pull(skb, hdrlen + SNAP_SIZE); | |
769 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
770 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
771 | } else { | |
d9e94d56 | 772 | __be16 len; |
b453872c JG |
773 | /* Leave Ethernet header part of hdr and full payload */ |
774 | skb_pull(skb, hdrlen); | |
775 | len = htons(skb->len); | |
776 | memcpy(skb_push(skb, 2), &len, 2); | |
777 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
778 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
779 | } | |
780 | ||
781 | #ifdef NOT_YET | |
782 | if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == | |
0edd5b44 | 783 | IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) { |
b453872c JG |
784 | /* Non-standard frame: get addr4 from its bogus location after |
785 | * the payload */ | |
27d7ff46 ACM |
786 | skb_copy_to_linear_data_offset(skb, ETH_ALEN, |
787 | skb->data + skb->len - ETH_ALEN, | |
788 | ETH_ALEN); | |
b453872c JG |
789 | skb_trim(skb, skb->len - ETH_ALEN); |
790 | } | |
791 | #endif | |
792 | ||
793 | stats->rx_packets++; | |
794 | stats->rx_bytes += skb->len; | |
795 | ||
796 | #ifdef NOT_YET | |
0edd5b44 | 797 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) { |
b453872c JG |
798 | if (dst[0] & 0x01) { |
799 | /* copy multicast frame both to the higher layers and | |
800 | * to the wireless media */ | |
801 | ieee->ap->bridged_multicast++; | |
802 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
803 | if (skb2 == NULL) | |
804 | printk(KERN_DEBUG "%s: skb_clone failed for " | |
805 | "multicast frame\n", dev->name); | |
806 | } else if (hostap_is_sta_assoc(ieee->ap, dst)) { | |
807 | /* send frame directly to the associated STA using | |
808 | * wireless media and not passing to higher layers */ | |
809 | ieee->ap->bridged_unicast++; | |
810 | skb2 = skb; | |
811 | skb = NULL; | |
812 | } | |
813 | } | |
814 | ||
815 | if (skb2 != NULL) { | |
816 | /* send to wireless media */ | |
459a98ed | 817 | skb2->dev = dev; |
4e39430a | 818 | skb2->protocol = htons(ETH_P_802_3); |
459a98ed | 819 | skb_reset_mac_header(skb2); |
c1d2bbe1 | 820 | skb_reset_network_header(skb2); |
b0e380b1 | 821 | /* skb2->network_header += ETH_HLEN; */ |
b453872c JG |
822 | dev_queue_xmit(skb2); |
823 | } | |
b453872c JG |
824 | #endif |
825 | ||
826 | if (skb) { | |
827 | skb->protocol = eth_type_trans(skb, dev); | |
828 | memset(skb->cb, 0, sizeof(skb->cb)); | |
0edd5b44 | 829 | skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
d6529237 ZY |
830 | if (netif_rx(skb) == NET_RX_DROP) { |
831 | /* netif_rx always succeeds, but it might drop | |
832 | * the packet. If it drops the packet, we log that | |
833 | * in our stats. */ | |
834 | IEEE80211_DEBUG_DROP | |
835 | ("RX: netif_rx dropped the packet\n"); | |
836 | stats->rx_dropped++; | |
837 | } | |
b453872c JG |
838 | } |
839 | ||
0edd5b44 | 840 | rx_exit: |
b453872c JG |
841 | #ifdef NOT_YET |
842 | if (sta) | |
843 | hostap_handle_sta_release(sta); | |
844 | #endif | |
845 | return 1; | |
846 | ||
0edd5b44 | 847 | rx_dropped: |
b453872c JG |
848 | stats->rx_dropped++; |
849 | ||
850 | /* Returning 0 indicates to caller that we have not handled the SKB-- | |
851 | * so it is still allocated and can be used again by underlying | |
852 | * hardware as a DMA target */ | |
853 | return 0; | |
854 | } | |
855 | ||
f2060f03 DD |
856 | /* Filter out unrelated packets, call ieee80211_rx[_mgt] |
857 | * This function takes over the skb, it should not be used again after calling | |
858 | * this function. */ | |
859 | void ieee80211_rx_any(struct ieee80211_device *ieee, | |
1a995b45 DV |
860 | struct sk_buff *skb, struct ieee80211_rx_stats *stats) |
861 | { | |
862 | struct ieee80211_hdr_4addr *hdr; | |
863 | int is_packet_for_us; | |
864 | u16 fc; | |
865 | ||
f2060f03 DD |
866 | if (ieee->iw_mode == IW_MODE_MONITOR) { |
867 | if (!ieee80211_rx(ieee, skb, stats)) | |
868 | dev_kfree_skb_irq(skb); | |
869 | return; | |
870 | } | |
871 | ||
872 | if (skb->len < sizeof(struct ieee80211_hdr)) | |
873 | goto drop_free; | |
1a995b45 DV |
874 | |
875 | hdr = (struct ieee80211_hdr_4addr *)skb->data; | |
876 | fc = le16_to_cpu(hdr->frame_ctl); | |
877 | ||
878 | if ((fc & IEEE80211_FCTL_VERS) != 0) | |
f2060f03 | 879 | goto drop_free; |
64265651 | 880 | |
1a995b45 DV |
881 | switch (fc & IEEE80211_FCTL_FTYPE) { |
882 | case IEEE80211_FTYPE_MGMT: | |
f2060f03 DD |
883 | if (skb->len < sizeof(struct ieee80211_hdr_3addr)) |
884 | goto drop_free; | |
1a995b45 | 885 | ieee80211_rx_mgt(ieee, hdr, stats); |
f2060f03 DD |
886 | dev_kfree_skb_irq(skb); |
887 | return; | |
1a995b45 DV |
888 | case IEEE80211_FTYPE_DATA: |
889 | break; | |
890 | case IEEE80211_FTYPE_CTL: | |
f2060f03 | 891 | return; |
1a995b45 | 892 | default: |
f2060f03 | 893 | return; |
1a995b45 DV |
894 | } |
895 | ||
896 | is_packet_for_us = 0; | |
897 | switch (ieee->iw_mode) { | |
898 | case IW_MODE_ADHOC: | |
899 | /* our BSS and not from/to DS */ | |
900 | if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0) | |
901 | if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) { | |
902 | /* promisc: get all */ | |
903 | if (ieee->dev->flags & IFF_PROMISC) | |
904 | is_packet_for_us = 1; | |
905 | /* to us */ | |
906 | else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0) | |
907 | is_packet_for_us = 1; | |
908 | /* mcast */ | |
909 | else if (is_multicast_ether_addr(hdr->addr1)) | |
910 | is_packet_for_us = 1; | |
911 | } | |
912 | break; | |
913 | case IW_MODE_INFRA: | |
914 | /* our BSS (== from our AP) and from DS */ | |
915 | if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0) | |
916 | if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) { | |
917 | /* promisc: get all */ | |
918 | if (ieee->dev->flags & IFF_PROMISC) | |
919 | is_packet_for_us = 1; | |
920 | /* to us */ | |
921 | else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0) | |
922 | is_packet_for_us = 1; | |
923 | /* mcast */ | |
924 | else if (is_multicast_ether_addr(hdr->addr1)) { | |
925 | /* not our own packet bcasted from AP */ | |
926 | if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN)) | |
927 | is_packet_for_us = 1; | |
928 | } | |
929 | } | |
930 | break; | |
931 | default: | |
932 | /* ? */ | |
933 | break; | |
934 | } | |
935 | ||
936 | if (is_packet_for_us) | |
f2060f03 DD |
937 | if (!ieee80211_rx(ieee, skb, stats)) |
938 | dev_kfree_skb_irq(skb); | |
939 | return; | |
940 | ||
941 | drop_free: | |
942 | dev_kfree_skb_irq(skb); | |
943 | ieee->stats.rx_dropped++; | |
944 | return; | |
1a995b45 DV |
945 | } |
946 | ||
b453872c JG |
947 | #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 |
948 | ||
9e8571af JK |
949 | static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; |
950 | ||
951 | /* | |
952 | * Make ther structure we read from the beacon packet has | |
953 | * the right values | |
954 | */ | |
955 | static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element | |
956 | *info_element, int sub_type) | |
957 | { | |
958 | ||
959 | if (info_element->qui_subtype != sub_type) | |
960 | return -1; | |
961 | if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) | |
962 | return -1; | |
963 | if (info_element->qui_type != QOS_OUI_TYPE) | |
964 | return -1; | |
965 | if (info_element->version != QOS_VERSION_1) | |
966 | return -1; | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | /* | |
972 | * Parse a QoS parameter element | |
973 | */ | |
974 | static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info | |
975 | *element_param, struct ieee80211_info_element | |
976 | *info_element) | |
977 | { | |
978 | int ret = 0; | |
979 | u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2; | |
980 | ||
981 | if ((info_element == NULL) || (element_param == NULL)) | |
982 | return -1; | |
983 | ||
984 | if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { | |
985 | memcpy(element_param->info_element.qui, info_element->data, | |
986 | info_element->len); | |
987 | element_param->info_element.elementID = info_element->id; | |
988 | element_param->info_element.length = info_element->len; | |
989 | } else | |
990 | ret = -1; | |
991 | if (ret == 0) | |
992 | ret = ieee80211_verify_qos_info(&element_param->info_element, | |
993 | QOS_OUI_PARAM_SUB_TYPE); | |
994 | return ret; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Parse a QoS information element | |
999 | */ | |
1000 | static int ieee80211_read_qos_info_element(struct | |
1001 | ieee80211_qos_information_element | |
1002 | *element_info, struct ieee80211_info_element | |
1003 | *info_element) | |
1004 | { | |
1005 | int ret = 0; | |
1006 | u16 size = sizeof(struct ieee80211_qos_information_element) - 2; | |
1007 | ||
1008 | if (element_info == NULL) | |
1009 | return -1; | |
1010 | if (info_element == NULL) | |
1011 | return -1; | |
1012 | ||
1013 | if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { | |
1014 | memcpy(element_info->qui, info_element->data, | |
1015 | info_element->len); | |
1016 | element_info->elementID = info_element->id; | |
1017 | element_info->length = info_element->len; | |
1018 | } else | |
1019 | ret = -1; | |
1020 | ||
1021 | if (ret == 0) | |
1022 | ret = ieee80211_verify_qos_info(element_info, | |
1023 | QOS_OUI_INFO_SUB_TYPE); | |
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Write QoS parameters from the ac parameters. | |
1029 | */ | |
1030 | static int ieee80211_qos_convert_ac_to_parameters(struct | |
1031 | ieee80211_qos_parameter_info | |
1032 | *param_elm, struct | |
1033 | ieee80211_qos_parameters | |
1034 | *qos_param) | |
1035 | { | |
1036 | int rc = 0; | |
1037 | int i; | |
1038 | struct ieee80211_qos_ac_parameter *ac_params; | |
1039 | u32 txop; | |
1040 | u8 cw_min; | |
1041 | u8 cw_max; | |
1042 | ||
1043 | for (i = 0; i < QOS_QUEUE_NUM; i++) { | |
1044 | ac_params = &(param_elm->ac_params_record[i]); | |
1045 | ||
1046 | qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F; | |
1047 | qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2; | |
1048 | ||
1049 | cw_min = ac_params->ecw_min_max & 0x0F; | |
8fffc15d | 1050 | qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1); |
9e8571af JK |
1051 | |
1052 | cw_max = (ac_params->ecw_min_max & 0xF0) >> 4; | |
8fffc15d | 1053 | qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1); |
9e8571af JK |
1054 | |
1055 | qos_param->flag[i] = | |
1056 | (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; | |
1057 | ||
1058 | txop = le16_to_cpu(ac_params->tx_op_limit) * 32; | |
8fffc15d | 1059 | qos_param->tx_op_limit[i] = cpu_to_le16(txop); |
9e8571af JK |
1060 | } |
1061 | return rc; | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * we have a generic data element which it may contain QoS information or | |
1066 | * parameters element. check the information element length to decide | |
1067 | * which type to read | |
1068 | */ | |
1069 | static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element | |
1070 | *info_element, | |
1071 | struct ieee80211_network *network) | |
1072 | { | |
1073 | int rc = 0; | |
1074 | struct ieee80211_qos_parameters *qos_param = NULL; | |
1075 | struct ieee80211_qos_information_element qos_info_element; | |
1076 | ||
1077 | rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); | |
1078 | ||
1079 | if (rc == 0) { | |
1080 | network->qos_data.param_count = qos_info_element.ac_info & 0x0F; | |
1081 | network->flags |= NETWORK_HAS_QOS_INFORMATION; | |
1082 | } else { | |
1083 | struct ieee80211_qos_parameter_info param_element; | |
1084 | ||
1085 | rc = ieee80211_read_qos_param_element(¶m_element, | |
1086 | info_element); | |
1087 | if (rc == 0) { | |
1088 | qos_param = &(network->qos_data.parameters); | |
1089 | ieee80211_qos_convert_ac_to_parameters(¶m_element, | |
1090 | qos_param); | |
1091 | network->flags |= NETWORK_HAS_QOS_PARAMETERS; | |
1092 | network->qos_data.param_count = | |
1093 | param_element.info_element.ac_info & 0x0F; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | if (rc == 0) { | |
1098 | IEEE80211_DEBUG_QOS("QoS is supported\n"); | |
1099 | network->qos_data.supported = 1; | |
1100 | } | |
1101 | return rc; | |
1102 | } | |
1103 | ||
d1b46b0f ZY |
1104 | #ifdef CONFIG_IEEE80211_DEBUG |
1105 | #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x | |
1106 | ||
1107 | static const char *get_info_element_string(u16 id) | |
1108 | { | |
1109 | switch (id) { | |
1110 | MFIE_STRING(SSID); | |
1111 | MFIE_STRING(RATES); | |
1112 | MFIE_STRING(FH_SET); | |
1113 | MFIE_STRING(DS_SET); | |
1114 | MFIE_STRING(CF_SET); | |
1115 | MFIE_STRING(TIM); | |
1116 | MFIE_STRING(IBSS_SET); | |
1117 | MFIE_STRING(COUNTRY); | |
1118 | MFIE_STRING(HOP_PARAMS); | |
1119 | MFIE_STRING(HOP_TABLE); | |
1120 | MFIE_STRING(REQUEST); | |
1121 | MFIE_STRING(CHALLENGE); | |
1122 | MFIE_STRING(POWER_CONSTRAINT); | |
1123 | MFIE_STRING(POWER_CAPABILITY); | |
1124 | MFIE_STRING(TPC_REQUEST); | |
1125 | MFIE_STRING(TPC_REPORT); | |
1126 | MFIE_STRING(SUPP_CHANNELS); | |
1127 | MFIE_STRING(CSA); | |
1128 | MFIE_STRING(MEASURE_REQUEST); | |
1129 | MFIE_STRING(MEASURE_REPORT); | |
1130 | MFIE_STRING(QUIET); | |
1131 | MFIE_STRING(IBSS_DFS); | |
1132 | MFIE_STRING(ERP_INFO); | |
1133 | MFIE_STRING(RSN); | |
1134 | MFIE_STRING(RATES_EX); | |
1135 | MFIE_STRING(GENERIC); | |
1136 | MFIE_STRING(QOS_PARAMETER); | |
1137 | default: | |
1138 | return "UNKNOWN"; | |
1139 | } | |
1140 | } | |
1141 | #endif | |
1142 | ||
ff0037b2 JK |
1143 | static int ieee80211_parse_info_param(struct ieee80211_info_element |
1144 | *info_element, u16 length, | |
1145 | struct ieee80211_network *network) | |
b453872c | 1146 | { |
ff9e00f1 | 1147 | u8 i; |
b453872c JG |
1148 | #ifdef CONFIG_IEEE80211_DEBUG |
1149 | char rates_str[64]; | |
1150 | char *p; | |
1151 | #endif | |
b453872c | 1152 | |
ff9e00f1 ID |
1153 | while (length >= sizeof(*info_element)) { |
1154 | if (sizeof(*info_element) + info_element->len > length) { | |
aec41a0d JB |
1155 | IEEE80211_DEBUG_MGMT("Info elem: parse failed: " |
1156 | "info_element->len + 2 > left : " | |
1157 | "info_element->len+2=%zd left=%d, id=%d.\n", | |
1158 | info_element->len + | |
1159 | sizeof(*info_element), | |
1160 | length, info_element->id); | |
f09fc44d ZY |
1161 | /* We stop processing but don't return an error here |
1162 | * because some misbehaviour APs break this rule. ie. | |
1163 | * Orinoco AP1000. */ | |
1164 | break; | |
0edd5b44 | 1165 | } |
b453872c JG |
1166 | |
1167 | switch (info_element->id) { | |
1168 | case MFIE_TYPE_SSID: | |
1169 | if (ieee80211_is_empty_essid(info_element->data, | |
1170 | info_element->len)) { | |
1171 | network->flags |= NETWORK_EMPTY_ESSID; | |
1172 | break; | |
1173 | } | |
1174 | ||
1175 | network->ssid_len = min(info_element->len, | |
0edd5b44 JG |
1176 | (u8) IW_ESSID_MAX_SIZE); |
1177 | memcpy(network->ssid, info_element->data, | |
1178 | network->ssid_len); | |
1179 | if (network->ssid_len < IW_ESSID_MAX_SIZE) | |
1180 | memset(network->ssid + network->ssid_len, 0, | |
b453872c JG |
1181 | IW_ESSID_MAX_SIZE - network->ssid_len); |
1182 | ||
ff9e00f1 | 1183 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", |
ff0037b2 | 1184 | network->ssid, network->ssid_len); |
b453872c JG |
1185 | break; |
1186 | ||
1187 | case MFIE_TYPE_RATES: | |
1188 | #ifdef CONFIG_IEEE80211_DEBUG | |
1189 | p = rates_str; | |
1190 | #endif | |
9e8571af JK |
1191 | network->rates_len = min(info_element->len, |
1192 | MAX_RATES_LENGTH); | |
b453872c JG |
1193 | for (i = 0; i < network->rates_len; i++) { |
1194 | network->rates[i] = info_element->data[i]; | |
1195 | #ifdef CONFIG_IEEE80211_DEBUG | |
9e8571af JK |
1196 | p += snprintf(p, sizeof(rates_str) - |
1197 | (p - rates_str), "%02X ", | |
1198 | network->rates[i]); | |
b453872c | 1199 | #endif |
0edd5b44 JG |
1200 | if (ieee80211_is_ofdm_rate |
1201 | (info_element->data[i])) { | |
b453872c JG |
1202 | network->flags |= NETWORK_HAS_OFDM; |
1203 | if (info_element->data[i] & | |
1204 | IEEE80211_BASIC_RATE_MASK) | |
1205 | network->flags &= | |
0edd5b44 | 1206 | ~NETWORK_HAS_CCK; |
b453872c JG |
1207 | } |
1208 | } | |
1209 | ||
ff9e00f1 | 1210 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", |
b453872c JG |
1211 | rates_str, network->rates_len); |
1212 | break; | |
1213 | ||
1214 | case MFIE_TYPE_RATES_EX: | |
1215 | #ifdef CONFIG_IEEE80211_DEBUG | |
1216 | p = rates_str; | |
1217 | #endif | |
9e8571af JK |
1218 | network->rates_ex_len = min(info_element->len, |
1219 | MAX_RATES_EX_LENGTH); | |
b453872c JG |
1220 | for (i = 0; i < network->rates_ex_len; i++) { |
1221 | network->rates_ex[i] = info_element->data[i]; | |
1222 | #ifdef CONFIG_IEEE80211_DEBUG | |
9e8571af JK |
1223 | p += snprintf(p, sizeof(rates_str) - |
1224 | (p - rates_str), "%02X ", | |
1225 | network->rates[i]); | |
b453872c | 1226 | #endif |
0edd5b44 JG |
1227 | if (ieee80211_is_ofdm_rate |
1228 | (info_element->data[i])) { | |
b453872c JG |
1229 | network->flags |= NETWORK_HAS_OFDM; |
1230 | if (info_element->data[i] & | |
1231 | IEEE80211_BASIC_RATE_MASK) | |
1232 | network->flags &= | |
0edd5b44 | 1233 | ~NETWORK_HAS_CCK; |
b453872c JG |
1234 | } |
1235 | } | |
1236 | ||
ff9e00f1 | 1237 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", |
b453872c JG |
1238 | rates_str, network->rates_ex_len); |
1239 | break; | |
1240 | ||
1241 | case MFIE_TYPE_DS_SET: | |
ff9e00f1 | 1242 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", |
b453872c | 1243 | info_element->data[0]); |
ff9e00f1 | 1244 | network->channel = info_element->data[0]; |
b453872c JG |
1245 | break; |
1246 | ||
0edd5b44 | 1247 | case MFIE_TYPE_FH_SET: |
ff9e00f1 | 1248 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); |
b453872c JG |
1249 | break; |
1250 | ||
1251 | case MFIE_TYPE_CF_SET: | |
ff9e00f1 | 1252 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); |
b453872c JG |
1253 | break; |
1254 | ||
1255 | case MFIE_TYPE_TIM: | |
41a25c61 ZY |
1256 | network->tim.tim_count = info_element->data[0]; |
1257 | network->tim.tim_period = info_element->data[1]; | |
1258 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); | |
b453872c JG |
1259 | break; |
1260 | ||
42c94e43 JK |
1261 | case MFIE_TYPE_ERP_INFO: |
1262 | network->erp_value = info_element->data[0]; | |
d8e2be90 | 1263 | network->flags |= NETWORK_HAS_ERP_VALUE; |
ff9e00f1 | 1264 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", |
42c94e43 JK |
1265 | network->erp_value); |
1266 | break; | |
1267 | ||
b453872c | 1268 | case MFIE_TYPE_IBSS_SET: |
42c94e43 | 1269 | network->atim_window = info_element->data[0]; |
ff9e00f1 | 1270 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", |
42c94e43 | 1271 | network->atim_window); |
b453872c JG |
1272 | break; |
1273 | ||
1274 | case MFIE_TYPE_CHALLENGE: | |
ff9e00f1 | 1275 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); |
b453872c JG |
1276 | break; |
1277 | ||
1278 | case MFIE_TYPE_GENERIC: | |
ff9e00f1 | 1279 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", |
b453872c | 1280 | info_element->len); |
9e8571af JK |
1281 | if (!ieee80211_parse_qos_info_param_IE(info_element, |
1282 | network)) | |
1283 | break; | |
1284 | ||
0edd5b44 | 1285 | if (info_element->len >= 4 && |
b453872c JG |
1286 | info_element->data[0] == 0x00 && |
1287 | info_element->data[1] == 0x50 && | |
1288 | info_element->data[2] == 0xf2 && | |
1289 | info_element->data[3] == 0x01) { | |
1290 | network->wpa_ie_len = min(info_element->len + 2, | |
0edd5b44 | 1291 | MAX_WPA_IE_LEN); |
b453872c JG |
1292 | memcpy(network->wpa_ie, info_element, |
1293 | network->wpa_ie_len); | |
1294 | } | |
1295 | break; | |
1296 | ||
1297 | case MFIE_TYPE_RSN: | |
ff9e00f1 | 1298 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", |
b453872c JG |
1299 | info_element->len); |
1300 | network->rsn_ie_len = min(info_element->len + 2, | |
0edd5b44 | 1301 | MAX_WPA_IE_LEN); |
b453872c JG |
1302 | memcpy(network->rsn_ie, info_element, |
1303 | network->rsn_ie_len); | |
1304 | break; | |
1305 | ||
9e8571af | 1306 | case MFIE_TYPE_QOS_PARAMETER: |
ff0037b2 JK |
1307 | printk(KERN_ERR |
1308 | "QoS Error need to parse QOS_PARAMETER IE\n"); | |
9e8571af | 1309 | break; |
d1b46b0f ZY |
1310 | /* 802.11h */ |
1311 | case MFIE_TYPE_POWER_CONSTRAINT: | |
1312 | network->power_constraint = info_element->data[0]; | |
1313 | network->flags |= NETWORK_HAS_POWER_CONSTRAINT; | |
1314 | break; | |
1315 | ||
1316 | case MFIE_TYPE_CSA: | |
1317 | network->power_constraint = info_element->data[0]; | |
1318 | network->flags |= NETWORK_HAS_CSA; | |
1319 | break; | |
1320 | ||
1321 | case MFIE_TYPE_QUIET: | |
1322 | network->quiet.count = info_element->data[0]; | |
1323 | network->quiet.period = info_element->data[1]; | |
1324 | network->quiet.duration = info_element->data[2]; | |
1325 | network->quiet.offset = info_element->data[3]; | |
1326 | network->flags |= NETWORK_HAS_QUIET; | |
1327 | break; | |
1328 | ||
1329 | case MFIE_TYPE_IBSS_DFS: | |
1330 | if (network->ibss_dfs) | |
1331 | break; | |
571d6eee ACM |
1332 | network->ibss_dfs = kmemdup(info_element->data, |
1333 | info_element->len, | |
1334 | GFP_ATOMIC); | |
d1b46b0f ZY |
1335 | if (!network->ibss_dfs) |
1336 | return 1; | |
d1b46b0f ZY |
1337 | network->flags |= NETWORK_HAS_IBSS_DFS; |
1338 | break; | |
1339 | ||
1340 | case MFIE_TYPE_TPC_REPORT: | |
1341 | network->tpc_report.transmit_power = | |
1342 | info_element->data[0]; | |
1343 | network->tpc_report.link_margin = info_element->data[1]; | |
1344 | network->flags |= NETWORK_HAS_TPC_REPORT; | |
1345 | break; | |
9e8571af | 1346 | |
b453872c | 1347 | default: |
d1b46b0f ZY |
1348 | IEEE80211_DEBUG_MGMT |
1349 | ("Unsupported info element: %s (%d)\n", | |
1350 | get_info_element_string(info_element->id), | |
1351 | info_element->id); | |
0edd5b44 JG |
1352 | break; |
1353 | } | |
b453872c | 1354 | |
ff9e00f1 | 1355 | length -= sizeof(*info_element) + info_element->len; |
ff0037b2 JK |
1356 | info_element = |
1357 | (struct ieee80211_info_element *)&info_element-> | |
1358 | data[info_element->len]; | |
0edd5b44 | 1359 | } |
b453872c | 1360 | |
ff9e00f1 ID |
1361 | return 0; |
1362 | } | |
1363 | ||
1364 | static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response | |
1365 | *frame, struct ieee80211_rx_stats *stats) | |
1366 | { | |
d1b46b0f ZY |
1367 | struct ieee80211_network network_resp = { |
1368 | .ibss_dfs = NULL, | |
1369 | }; | |
ff9e00f1 ID |
1370 | struct ieee80211_network *network = &network_resp; |
1371 | struct net_device *dev = ieee->dev; | |
1372 | ||
1373 | network->flags = 0; | |
1374 | network->qos_data.active = 0; | |
1375 | network->qos_data.supported = 0; | |
1376 | network->qos_data.param_count = 0; | |
1377 | network->qos_data.old_param_count = 0; | |
1378 | ||
1379 | //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF); | |
1380 | network->atim_window = le16_to_cpu(frame->aid); | |
1381 | network->listen_interval = le16_to_cpu(frame->status); | |
c1bda44a ID |
1382 | memcpy(network->bssid, frame->header.addr3, ETH_ALEN); |
1383 | network->capability = le16_to_cpu(frame->capability); | |
1384 | network->last_scanned = jiffies; | |
1385 | network->rates_len = network->rates_ex_len = 0; | |
1386 | network->last_associate = 0; | |
1387 | network->ssid_len = 0; | |
ff0037b2 JK |
1388 | network->erp_value = |
1389 | (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0; | |
c1bda44a ID |
1390 | |
1391 | if (stats->freq == IEEE80211_52GHZ_BAND) { | |
1392 | /* for A band (No DS info) */ | |
1393 | network->channel = stats->received_channel; | |
1394 | } else | |
1395 | network->flags |= NETWORK_HAS_CCK; | |
1396 | ||
1397 | network->wpa_ie_len = 0; | |
1398 | network->rsn_ie_len = 0; | |
ff9e00f1 | 1399 | |
ff0037b2 JK |
1400 | if (ieee80211_parse_info_param |
1401 | (frame->info_element, stats->len - sizeof(*frame), network)) | |
ff9e00f1 ID |
1402 | return 1; |
1403 | ||
c1bda44a ID |
1404 | network->mode = 0; |
1405 | if (stats->freq == IEEE80211_52GHZ_BAND) | |
1406 | network->mode = IEEE_A; | |
1407 | else { | |
1408 | if (network->flags & NETWORK_HAS_OFDM) | |
1409 | network->mode |= IEEE_G; | |
1410 | if (network->flags & NETWORK_HAS_CCK) | |
1411 | network->mode |= IEEE_B; | |
1412 | } | |
1413 | ||
1414 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) | |
1415 | network->flags |= NETWORK_EMPTY_ESSID; | |
1416 | ||
1417 | memcpy(&network->stats, stats, sizeof(network->stats)); | |
1418 | ||
ff9e00f1 ID |
1419 | if (ieee->handle_assoc_response != NULL) |
1420 | ieee->handle_assoc_response(dev, frame, network); | |
1421 | ||
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | /***************************************************/ | |
1426 | ||
858119e1 | 1427 | static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response |
ff9e00f1 ID |
1428 | *beacon, |
1429 | struct ieee80211_network *network, | |
1430 | struct ieee80211_rx_stats *stats) | |
1431 | { | |
0795af57 JP |
1432 | DECLARE_MAC_BUF(mac); |
1433 | ||
ff9e00f1 ID |
1434 | network->qos_data.active = 0; |
1435 | network->qos_data.supported = 0; | |
1436 | network->qos_data.param_count = 0; | |
c1bda44a | 1437 | network->qos_data.old_param_count = 0; |
ff9e00f1 ID |
1438 | |
1439 | /* Pull out fixed field data */ | |
1440 | memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); | |
1441 | network->capability = le16_to_cpu(beacon->capability); | |
1442 | network->last_scanned = jiffies; | |
1443 | network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); | |
1444 | network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); | |
1445 | network->beacon_interval = le16_to_cpu(beacon->beacon_interval); | |
1446 | /* Where to pull this? beacon->listen_interval; */ | |
1447 | network->listen_interval = 0x0A; | |
1448 | network->rates_len = network->rates_ex_len = 0; | |
1449 | network->last_associate = 0; | |
1450 | network->ssid_len = 0; | |
1451 | network->flags = 0; | |
1452 | network->atim_window = 0; | |
1453 | network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? | |
1454 | 0x3 : 0x0; | |
1455 | ||
1456 | if (stats->freq == IEEE80211_52GHZ_BAND) { | |
1457 | /* for A band (No DS info) */ | |
1458 | network->channel = stats->received_channel; | |
1459 | } else | |
1460 | network->flags |= NETWORK_HAS_CCK; | |
1461 | ||
1462 | network->wpa_ie_len = 0; | |
1463 | network->rsn_ie_len = 0; | |
1464 | ||
ff0037b2 JK |
1465 | if (ieee80211_parse_info_param |
1466 | (beacon->info_element, stats->len - sizeof(*beacon), network)) | |
ff9e00f1 ID |
1467 | return 1; |
1468 | ||
b453872c JG |
1469 | network->mode = 0; |
1470 | if (stats->freq == IEEE80211_52GHZ_BAND) | |
1471 | network->mode = IEEE_A; | |
1472 | else { | |
1473 | if (network->flags & NETWORK_HAS_OFDM) | |
1474 | network->mode |= IEEE_G; | |
1475 | if (network->flags & NETWORK_HAS_CCK) | |
1476 | network->mode |= IEEE_B; | |
1477 | } | |
1478 | ||
1479 | if (network->mode == 0) { | |
0795af57 | 1480 | IEEE80211_DEBUG_SCAN("Filtered out '%s (%s)' " |
b453872c JG |
1481 | "network.\n", |
1482 | escape_essid(network->ssid, | |
1483 | network->ssid_len), | |
0795af57 | 1484 | print_mac(mac, network->bssid)); |
b453872c JG |
1485 | return 1; |
1486 | } | |
1487 | ||
1488 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) | |
1489 | network->flags |= NETWORK_EMPTY_ESSID; | |
1490 | ||
1491 | memcpy(&network->stats, stats, sizeof(network->stats)); | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static inline int is_same_network(struct ieee80211_network *src, | |
1497 | struct ieee80211_network *dst) | |
1498 | { | |
1499 | /* A network is only a duplicate if the channel, BSSID, and ESSID | |
1500 | * all match. We treat all <hidden> with the same BSSID and channel | |
1501 | * as one network */ | |
1502 | return ((src->ssid_len == dst->ssid_len) && | |
1503 | (src->channel == dst->channel) && | |
d3f4a687 | 1504 | !compare_ether_addr(src->bssid, dst->bssid) && |
b453872c JG |
1505 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); |
1506 | } | |
1507 | ||
858119e1 | 1508 | static void update_network(struct ieee80211_network *dst, |
b453872c JG |
1509 | struct ieee80211_network *src) |
1510 | { | |
9e8571af JK |
1511 | int qos_active; |
1512 | u8 old_param; | |
0795af57 | 1513 | DECLARE_MAC_BUF(mac); |
9e8571af | 1514 | |
d1b46b0f ZY |
1515 | ieee80211_network_reset(dst); |
1516 | dst->ibss_dfs = src->ibss_dfs; | |
1517 | ||
f44349f2 JK |
1518 | /* We only update the statistics if they were created by receiving |
1519 | * the network information on the actual channel the network is on. | |
64265651 | 1520 | * |
f44349f2 JK |
1521 | * This keeps beacons received on neighbor channels from bringing |
1522 | * down the signal level of an AP. */ | |
1523 | if (dst->channel == src->stats.received_channel) | |
1524 | memcpy(&dst->stats, &src->stats, | |
1525 | sizeof(struct ieee80211_rx_stats)); | |
1526 | else | |
0795af57 JP |
1527 | IEEE80211_DEBUG_SCAN("Network %s info received " |
1528 | "off channel (%d vs. %d)\n", print_mac(mac, src->bssid), | |
f44349f2 JK |
1529 | dst->channel, src->stats.received_channel); |
1530 | ||
b453872c JG |
1531 | dst->capability = src->capability; |
1532 | memcpy(dst->rates, src->rates, src->rates_len); | |
1533 | dst->rates_len = src->rates_len; | |
1534 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); | |
1535 | dst->rates_ex_len = src->rates_ex_len; | |
1536 | ||
1537 | dst->mode = src->mode; | |
1538 | dst->flags = src->flags; | |
1539 | dst->time_stamp[0] = src->time_stamp[0]; | |
1540 | dst->time_stamp[1] = src->time_stamp[1]; | |
1541 | ||
1542 | dst->beacon_interval = src->beacon_interval; | |
1543 | dst->listen_interval = src->listen_interval; | |
1544 | dst->atim_window = src->atim_window; | |
42c94e43 | 1545 | dst->erp_value = src->erp_value; |
41a25c61 | 1546 | dst->tim = src->tim; |
b453872c JG |
1547 | |
1548 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); | |
1549 | dst->wpa_ie_len = src->wpa_ie_len; | |
1550 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); | |
1551 | dst->rsn_ie_len = src->rsn_ie_len; | |
1552 | ||
1553 | dst->last_scanned = jiffies; | |
9e8571af JK |
1554 | qos_active = src->qos_data.active; |
1555 | old_param = dst->qos_data.old_param_count; | |
1556 | if (dst->flags & NETWORK_HAS_QOS_MASK) | |
1557 | memcpy(&dst->qos_data, &src->qos_data, | |
1558 | sizeof(struct ieee80211_qos_data)); | |
1559 | else { | |
1560 | dst->qos_data.supported = src->qos_data.supported; | |
1561 | dst->qos_data.param_count = src->qos_data.param_count; | |
1562 | } | |
1563 | ||
1564 | if (dst->qos_data.supported == 1) { | |
1565 | if (dst->ssid_len) | |
1566 | IEEE80211_DEBUG_QOS | |
1567 | ("QoS the network %s is QoS supported\n", | |
1568 | dst->ssid); | |
1569 | else | |
1570 | IEEE80211_DEBUG_QOS | |
1571 | ("QoS the network is QoS supported\n"); | |
1572 | } | |
1573 | dst->qos_data.active = qos_active; | |
1574 | dst->qos_data.old_param_count = old_param; | |
1575 | ||
b453872c JG |
1576 | /* dst->last_associate is not overwritten */ |
1577 | } | |
1578 | ||
4832843d | 1579 | static inline int is_beacon(__le16 fc) |
3f552bbf JK |
1580 | { |
1581 | return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); | |
1582 | } | |
1583 | ||
858119e1 | 1584 | static void ieee80211_process_probe_response(struct ieee80211_device |
74079fdc | 1585 | *ieee, struct |
0edd5b44 | 1586 | ieee80211_probe_response |
74079fdc | 1587 | *beacon, struct ieee80211_rx_stats |
0edd5b44 | 1588 | *stats) |
b453872c | 1589 | { |
3f552bbf | 1590 | struct net_device *dev = ieee->dev; |
d1b46b0f ZY |
1591 | struct ieee80211_network network = { |
1592 | .ibss_dfs = NULL, | |
1593 | }; | |
b453872c JG |
1594 | struct ieee80211_network *target; |
1595 | struct ieee80211_network *oldest = NULL; | |
1596 | #ifdef CONFIG_IEEE80211_DEBUG | |
68e4e036 | 1597 | struct ieee80211_info_element *info_element = beacon->info_element; |
b453872c JG |
1598 | #endif |
1599 | unsigned long flags; | |
0795af57 | 1600 | DECLARE_MAC_BUF(mac); |
b453872c | 1601 | |
0795af57 | 1602 | IEEE80211_DEBUG_SCAN("'%s' (%s" |
8524f59d AV |
1603 | "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", |
1604 | escape_essid(info_element->data, info_element->len), | |
1605 | print_mac(mac, beacon->header.addr3), | |
1606 | (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0', | |
1607 | (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0', | |
1608 | (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0', | |
1609 | (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0', | |
1610 | (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0', | |
1611 | (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0', | |
1612 | (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0', | |
1613 | (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0', | |
1614 | (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0', | |
1615 | (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0', | |
1616 | (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0', | |
1617 | (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0', | |
1618 | (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0', | |
1619 | (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0', | |
1620 | (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0', | |
1621 | (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0'); | |
b453872c JG |
1622 | |
1623 | if (ieee80211_network_init(ieee, beacon, &network, stats)) { | |
0795af57 | 1624 | IEEE80211_DEBUG_SCAN("Dropped '%s' (%s) via %s.\n", |
b453872c JG |
1625 | escape_essid(info_element->data, |
1626 | info_element->len), | |
0795af57 | 1627 | print_mac(mac, beacon->header.addr3), |
4832843d | 1628 | is_beacon(beacon->header.frame_ctl) ? |
3f552bbf | 1629 | "BEACON" : "PROBE RESPONSE"); |
b453872c JG |
1630 | return; |
1631 | } | |
1632 | ||
1633 | /* The network parsed correctly -- so now we scan our known networks | |
1634 | * to see if we can find it in our list. | |
1635 | * | |
1636 | * NOTE: This search is definitely not optimized. Once its doing | |
1637 | * the "right thing" we'll optimize it for efficiency if | |
1638 | * necessary */ | |
1639 | ||
1640 | /* Search for this entry in the list and update it if it is | |
1641 | * already there. */ | |
1642 | ||
1643 | spin_lock_irqsave(&ieee->lock, flags); | |
1644 | ||
1645 | list_for_each_entry(target, &ieee->network_list, list) { | |
1646 | if (is_same_network(target, &network)) | |
1647 | break; | |
1648 | ||
1649 | if ((oldest == NULL) || | |
1650 | (target->last_scanned < oldest->last_scanned)) | |
1651 | oldest = target; | |
1652 | } | |
1653 | ||
1654 | /* If we didn't find a match, then get a new network slot to initialize | |
1655 | * with this beacon's information */ | |
1656 | if (&target->list == &ieee->network_list) { | |
1657 | if (list_empty(&ieee->network_free_list)) { | |
1658 | /* If there are no more slots, expire the oldest */ | |
1659 | list_del(&oldest->list); | |
1660 | target = oldest; | |
0795af57 | 1661 | IEEE80211_DEBUG_SCAN("Expired '%s' (%s) from " |
b453872c JG |
1662 | "network list.\n", |
1663 | escape_essid(target->ssid, | |
1664 | target->ssid_len), | |
0795af57 | 1665 | print_mac(mac, target->bssid)); |
d1b46b0f | 1666 | ieee80211_network_reset(target); |
b453872c JG |
1667 | } else { |
1668 | /* Otherwise just pull from the free list */ | |
1669 | target = list_entry(ieee->network_free_list.next, | |
1670 | struct ieee80211_network, list); | |
1671 | list_del(ieee->network_free_list.next); | |
1672 | } | |
1673 | ||
b453872c | 1674 | #ifdef CONFIG_IEEE80211_DEBUG |
0795af57 | 1675 | IEEE80211_DEBUG_SCAN("Adding '%s' (%s) via %s.\n", |
b453872c JG |
1676 | escape_essid(network.ssid, |
1677 | network.ssid_len), | |
0795af57 | 1678 | print_mac(mac, network.bssid), |
4832843d | 1679 | is_beacon(beacon->header.frame_ctl) ? |
3f552bbf | 1680 | "BEACON" : "PROBE RESPONSE"); |
b453872c JG |
1681 | #endif |
1682 | memcpy(target, &network, sizeof(*target)); | |
d1b46b0f | 1683 | network.ibss_dfs = NULL; |
b453872c JG |
1684 | list_add_tail(&target->list, &ieee->network_list); |
1685 | } else { | |
0795af57 | 1686 | IEEE80211_DEBUG_SCAN("Updating '%s' (%s) via %s.\n", |
b453872c JG |
1687 | escape_essid(target->ssid, |
1688 | target->ssid_len), | |
0795af57 | 1689 | print_mac(mac, target->bssid), |
4832843d | 1690 | is_beacon(beacon->header.frame_ctl) ? |
3f552bbf | 1691 | "BEACON" : "PROBE RESPONSE"); |
b453872c | 1692 | update_network(target, &network); |
d1b46b0f | 1693 | network.ibss_dfs = NULL; |
b453872c JG |
1694 | } |
1695 | ||
1696 | spin_unlock_irqrestore(&ieee->lock, flags); | |
3f552bbf | 1697 | |
4832843d | 1698 | if (is_beacon(beacon->header.frame_ctl)) { |
3f552bbf | 1699 | if (ieee->handle_beacon != NULL) |
72df16f1 | 1700 | ieee->handle_beacon(dev, beacon, target); |
3f552bbf JK |
1701 | } else { |
1702 | if (ieee->handle_probe_response != NULL) | |
72df16f1 | 1703 | ieee->handle_probe_response(dev, beacon, target); |
3f552bbf | 1704 | } |
b453872c JG |
1705 | } |
1706 | ||
1707 | void ieee80211_rx_mgt(struct ieee80211_device *ieee, | |
ee34af37 | 1708 | struct ieee80211_hdr_4addr *header, |
b453872c JG |
1709 | struct ieee80211_rx_stats *stats) |
1710 | { | |
fd27817c | 1711 | switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { |
b453872c JG |
1712 | case IEEE80211_STYPE_ASSOC_RESP: |
1713 | IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n", | |
fd27817c JK |
1714 | WLAN_FC_GET_STYPE(le16_to_cpu |
1715 | (header->frame_ctl))); | |
9e8571af JK |
1716 | ieee80211_handle_assoc_resp(ieee, |
1717 | (struct ieee80211_assoc_response *) | |
1718 | header, stats); | |
b453872c JG |
1719 | break; |
1720 | ||
1721 | case IEEE80211_STYPE_REASSOC_RESP: | |
1722 | IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n", | |
fd27817c JK |
1723 | WLAN_FC_GET_STYPE(le16_to_cpu |
1724 | (header->frame_ctl))); | |
b453872c JG |
1725 | break; |
1726 | ||
42c94e43 | 1727 | case IEEE80211_STYPE_PROBE_REQ: |
1a1fedf4 | 1728 | IEEE80211_DEBUG_MGMT("received auth (%d)\n", |
42c94e43 JK |
1729 | WLAN_FC_GET_STYPE(le16_to_cpu |
1730 | (header->frame_ctl))); | |
1731 | ||
1732 | if (ieee->handle_probe_request != NULL) | |
1733 | ieee->handle_probe_request(ieee->dev, | |
1734 | (struct | |
1735 | ieee80211_probe_request *) | |
1736 | header, stats); | |
1737 | break; | |
1738 | ||
b453872c JG |
1739 | case IEEE80211_STYPE_PROBE_RESP: |
1740 | IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", | |
fd27817c JK |
1741 | WLAN_FC_GET_STYPE(le16_to_cpu |
1742 | (header->frame_ctl))); | |
b453872c | 1743 | IEEE80211_DEBUG_SCAN("Probe response\n"); |
0edd5b44 JG |
1744 | ieee80211_process_probe_response(ieee, |
1745 | (struct | |
1746 | ieee80211_probe_response *) | |
1747 | header, stats); | |
b453872c JG |
1748 | break; |
1749 | ||
1750 | case IEEE80211_STYPE_BEACON: | |
1751 | IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", | |
fd27817c JK |
1752 | WLAN_FC_GET_STYPE(le16_to_cpu |
1753 | (header->frame_ctl))); | |
b453872c | 1754 | IEEE80211_DEBUG_SCAN("Beacon\n"); |
0edd5b44 JG |
1755 | ieee80211_process_probe_response(ieee, |
1756 | (struct | |
1757 | ieee80211_probe_response *) | |
1758 | header, stats); | |
b453872c | 1759 | break; |
3f552bbf JK |
1760 | case IEEE80211_STYPE_AUTH: |
1761 | ||
1a1fedf4 | 1762 | IEEE80211_DEBUG_MGMT("received auth (%d)\n", |
3f552bbf JK |
1763 | WLAN_FC_GET_STYPE(le16_to_cpu |
1764 | (header->frame_ctl))); | |
1765 | ||
1766 | if (ieee->handle_auth != NULL) | |
1767 | ieee->handle_auth(ieee->dev, | |
1768 | (struct ieee80211_auth *)header); | |
1769 | break; | |
1770 | ||
1771 | case IEEE80211_STYPE_DISASSOC: | |
1772 | if (ieee->handle_disassoc != NULL) | |
1773 | ieee->handle_disassoc(ieee->dev, | |
1774 | (struct ieee80211_disassoc *) | |
1775 | header); | |
1776 | break; | |
b453872c | 1777 | |
d1b46b0f ZY |
1778 | case IEEE80211_STYPE_ACTION: |
1779 | IEEE80211_DEBUG_MGMT("ACTION\n"); | |
1780 | if (ieee->handle_action) | |
1781 | ieee->handle_action(ieee->dev, | |
1782 | (struct ieee80211_action *) | |
1783 | header, stats); | |
1784 | break; | |
1785 | ||
2f633db5 LF |
1786 | case IEEE80211_STYPE_REASSOC_REQ: |
1787 | IEEE80211_DEBUG_MGMT("received reassoc (%d)\n", | |
1788 | WLAN_FC_GET_STYPE(le16_to_cpu | |
1789 | (header->frame_ctl))); | |
1790 | ||
7736b5bd ZY |
1791 | IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n", |
1792 | ieee->dev->name); | |
2f633db5 LF |
1793 | if (ieee->handle_reassoc_request != NULL) |
1794 | ieee->handle_reassoc_request(ieee->dev, | |
1795 | (struct ieee80211_reassoc_request *) | |
1796 | header); | |
1797 | break; | |
1798 | ||
1799 | case IEEE80211_STYPE_ASSOC_REQ: | |
1800 | IEEE80211_DEBUG_MGMT("received assoc (%d)\n", | |
1801 | WLAN_FC_GET_STYPE(le16_to_cpu | |
1802 | (header->frame_ctl))); | |
1803 | ||
7736b5bd ZY |
1804 | IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n", |
1805 | ieee->dev->name); | |
2f633db5 LF |
1806 | if (ieee->handle_assoc_request != NULL) |
1807 | ieee->handle_assoc_request(ieee->dev); | |
1808 | break; | |
1809 | ||
31b59eae | 1810 | case IEEE80211_STYPE_DEAUTH: |
d1b46b0f | 1811 | IEEE80211_DEBUG_MGMT("DEAUTH\n"); |
31b59eae | 1812 | if (ieee->handle_deauth != NULL) |
d1b46b0f ZY |
1813 | ieee->handle_deauth(ieee->dev, |
1814 | (struct ieee80211_deauth *) | |
31b59eae JK |
1815 | header); |
1816 | break; | |
b453872c JG |
1817 | default: |
1818 | IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n", | |
fd27817c JK |
1819 | WLAN_FC_GET_STYPE(le16_to_cpu |
1820 | (header->frame_ctl))); | |
7736b5bd ZY |
1821 | IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n", |
1822 | ieee->dev->name, | |
1823 | WLAN_FC_GET_STYPE(le16_to_cpu | |
1824 | (header->frame_ctl))); | |
b453872c JG |
1825 | break; |
1826 | } | |
1827 | } | |
1828 | ||
f2060f03 | 1829 | EXPORT_SYMBOL_GPL(ieee80211_rx_any); |
b453872c JG |
1830 | EXPORT_SYMBOL(ieee80211_rx_mgt); |
1831 | EXPORT_SYMBOL(ieee80211_rx); |