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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 | |
6 | * <jkmaline@cc.hut.fi> | |
7 | * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
8 | * Copyright (c) 2004, Intel Corporation | |
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 | Few modifications for Realtek's Wi-Fi drivers by | |
17 | Andrea Merello <andrea.merello@gmail.com> | |
18 | ||
19 | A special thanks goes to Realtek for their support ! | |
20 | ||
21 | ******************************************************************************/ | |
22 | ||
23 | ||
24 | #include <linux/compiler.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/if_arp.h> | |
27 | #include <linux/in6.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/ip.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/wireless.h> | |
40 | #include <linux/etherdevice.h> | |
41 | #include <linux/uaccess.h> | |
42 | #include <linux/ctype.h> | |
43 | ||
44 | #include "rtllib.h" | |
45 | #include "dot11d.h" | |
46 | ||
47 | static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb, | |
48 | struct rtllib_rx_stats *stats); | |
49 | ||
50 | static inline void rtllib_monitor_rx(struct rtllib_device *ieee, | |
51 | struct sk_buff *skb, | |
52 | struct rtllib_rx_stats *rx_status, | |
53 | size_t hdr_length) | |
54 | { | |
55 | skb->dev = ieee->dev; | |
56 | skb_reset_mac_header(skb); | |
57 | skb_pull(skb, hdr_length); | |
58 | skb->pkt_type = PACKET_OTHERHOST; | |
59 | skb->protocol = htons(ETH_P_80211_RAW); | |
60 | memset(skb->cb, 0, sizeof(skb->cb)); | |
61 | netif_rx(skb); | |
62 | } | |
63 | ||
64 | /* Called only as a tasklet (software IRQ) */ | |
65 | static struct rtllib_frag_entry * | |
66 | rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq, | |
67 | unsigned int frag, u8 tid, u8 *src, u8 *dst) | |
68 | { | |
69 | struct rtllib_frag_entry *entry; | |
70 | int i; | |
71 | ||
72 | for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) { | |
73 | entry = &ieee->frag_cache[tid][i]; | |
74 | if (entry->skb != NULL && | |
75 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { | |
76 | netdev_dbg(ieee->dev, | |
77 | "expiring fragment cache entry seq=%u last_frag=%u\n", | |
78 | entry->seq, entry->last_frag); | |
79 | dev_kfree_skb_any(entry->skb); | |
80 | entry->skb = NULL; | |
81 | } | |
82 | ||
83 | if (entry->skb != NULL && entry->seq == seq && | |
84 | (entry->last_frag + 1 == frag || frag == -1) && | |
85 | memcmp(entry->src_addr, src, ETH_ALEN) == 0 && | |
86 | memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) | |
87 | return entry; | |
88 | } | |
89 | ||
90 | return NULL; | |
91 | } | |
92 | ||
93 | /* Called only as a tasklet (software IRQ) */ | |
94 | static struct sk_buff * | |
95 | rtllib_frag_cache_get(struct rtllib_device *ieee, | |
96 | struct rtllib_hdr_4addr *hdr) | |
97 | { | |
98 | struct sk_buff *skb = NULL; | |
99 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
100 | u16 sc = le16_to_cpu(hdr->seq_ctl); | |
101 | unsigned int frag = WLAN_GET_SEQ_FRAG(sc); | |
102 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); | |
103 | struct rtllib_frag_entry *entry; | |
104 | struct rtllib_hdr_3addrqos *hdr_3addrqos; | |
105 | struct rtllib_hdr_4addrqos *hdr_4addrqos; | |
106 | u8 tid; | |
107 | ||
108 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && | |
109 | RTLLIB_QOS_HAS_SEQ(fc)) { | |
110 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; | |
111 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
112 | tid = UP2AC(tid); | |
113 | tid++; | |
114 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { | |
115 | hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; | |
116 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
117 | tid = UP2AC(tid); | |
118 | tid++; | |
119 | } else { | |
120 | tid = 0; | |
121 | } | |
122 | ||
123 | if (frag == 0) { | |
124 | /* Reserve enough space to fit maximum frame length */ | |
125 | skb = dev_alloc_skb(ieee->dev->mtu + | |
126 | sizeof(struct rtllib_hdr_4addr) + | |
127 | 8 /* LLC */ + | |
128 | 2 /* alignment */ + | |
129 | 8 /* WEP */ + | |
130 | ETH_ALEN /* WDS */ + | |
131 | /* QOS Control */ | |
132 | (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0)); | |
133 | if (!skb) | |
134 | return NULL; | |
135 | ||
136 | entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; | |
137 | ieee->frag_next_idx[tid]++; | |
138 | if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN) | |
139 | ieee->frag_next_idx[tid] = 0; | |
140 | ||
141 | if (entry->skb != NULL) | |
142 | dev_kfree_skb_any(entry->skb); | |
143 | ||
144 | entry->first_frag_time = jiffies; | |
145 | entry->seq = seq; | |
146 | entry->last_frag = frag; | |
147 | entry->skb = skb; | |
148 | ether_addr_copy(entry->src_addr, hdr->addr2); | |
149 | ether_addr_copy(entry->dst_addr, hdr->addr1); | |
150 | } else { | |
151 | /* received a fragment of a frame for which the head fragment | |
152 | * should have already been received | |
153 | */ | |
154 | entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2, | |
155 | hdr->addr1); | |
156 | if (entry != NULL) { | |
157 | entry->last_frag = frag; | |
158 | skb = entry->skb; | |
159 | } | |
160 | } | |
161 | ||
162 | return skb; | |
163 | } | |
164 | ||
165 | ||
166 | /* Called only as a tasklet (software IRQ) */ | |
167 | static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee, | |
168 | struct rtllib_hdr_4addr *hdr) | |
169 | { | |
170 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
171 | u16 sc = le16_to_cpu(hdr->seq_ctl); | |
172 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); | |
173 | struct rtllib_frag_entry *entry; | |
174 | struct rtllib_hdr_3addrqos *hdr_3addrqos; | |
175 | struct rtllib_hdr_4addrqos *hdr_4addrqos; | |
176 | u8 tid; | |
177 | ||
178 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && | |
179 | RTLLIB_QOS_HAS_SEQ(fc)) { | |
180 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; | |
181 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
182 | tid = UP2AC(tid); | |
183 | tid++; | |
184 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { | |
185 | hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; | |
186 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
187 | tid = UP2AC(tid); | |
188 | tid++; | |
189 | } else { | |
190 | tid = 0; | |
191 | } | |
192 | ||
193 | entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, | |
194 | hdr->addr1); | |
195 | ||
196 | if (entry == NULL) { | |
197 | netdev_dbg(ieee->dev, | |
198 | "Couldn't invalidate fragment cache entry (seq=%u)\n", | |
199 | seq); | |
200 | return -1; | |
201 | } | |
202 | ||
203 | entry->skb = NULL; | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* rtllib_rx_frame_mgtmt | |
208 | * | |
209 | * Responsible for handling management control frames | |
210 | * | |
211 | * Called by rtllib_rx | |
212 | */ | |
213 | static inline int | |
214 | rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb, | |
215 | struct rtllib_rx_stats *rx_stats, u16 type, | |
216 | u16 stype) | |
217 | { | |
218 | /* On the struct stats definition there is written that | |
219 | * this is not mandatory.... but seems that the probe | |
220 | * response parser uses it | |
221 | */ | |
222 | struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data; | |
223 | ||
224 | rx_stats->len = skb->len; | |
225 | rtllib_rx_mgt(ieee, skb, rx_stats); | |
226 | if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { | |
227 | dev_kfree_skb_any(skb); | |
228 | return 0; | |
229 | } | |
230 | rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype); | |
231 | ||
232 | dev_kfree_skb_any(skb); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation | |
238 | * Ethernet-II snap header (RFC1042 for most EtherTypes) | |
239 | */ | |
240 | static unsigned char rfc1042_header[] = { | |
241 | 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 | |
242 | }; | |
243 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
244 | static unsigned char bridge_tunnel_header[] = { | |
245 | 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 | |
246 | }; | |
247 | /* No encapsulation header if EtherType < 0x600 (=length) */ | |
248 | ||
249 | /* Called by rtllib_rx_frame_decrypt */ | |
250 | static int rtllib_is_eapol_frame(struct rtllib_device *ieee, | |
251 | struct sk_buff *skb, size_t hdrlen) | |
252 | { | |
253 | struct net_device *dev = ieee->dev; | |
254 | u16 fc, ethertype; | |
255 | struct rtllib_hdr_4addr *hdr; | |
256 | u8 *pos; | |
257 | ||
258 | if (skb->len < 24) | |
259 | return 0; | |
260 | ||
261 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
262 | fc = le16_to_cpu(hdr->frame_ctl); | |
263 | ||
264 | /* check that the frame is unicast frame to us */ | |
265 | if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == | |
266 | RTLLIB_FCTL_TODS && | |
267 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && | |
268 | memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { | |
269 | /* ToDS frame with own addr BSSID and DA */ | |
270 | } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == | |
271 | RTLLIB_FCTL_FROMDS && | |
272 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { | |
273 | /* FromDS frame with own addr as DA */ | |
274 | } else | |
275 | return 0; | |
276 | ||
277 | if (skb->len < 24 + 8) | |
278 | return 0; | |
279 | ||
280 | /* check for port access entity Ethernet type */ | |
281 | pos = skb->data + hdrlen; | |
282 | ethertype = (pos[6] << 8) | pos[7]; | |
283 | if (ethertype == ETH_P_PAE) | |
284 | return 1; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* Called only as a tasklet (software IRQ), by rtllib_rx */ | |
290 | static inline int | |
291 | rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, | |
292 | struct lib80211_crypt_data *crypt) | |
293 | { | |
294 | struct rtllib_hdr_4addr *hdr; | |
295 | int res, hdrlen; | |
296 | ||
297 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) | |
298 | return 0; | |
299 | ||
300 | if (ieee->hwsec_active) { | |
301 | struct cb_desc *tcb_desc = (struct cb_desc *) | |
302 | (skb->cb + MAX_DEV_ADDR_SIZE); | |
303 | ||
304 | tcb_desc->bHwSec = 1; | |
305 | ||
306 | if (ieee->need_sw_enc) | |
307 | tcb_desc->bHwSec = 0; | |
308 | } | |
309 | ||
310 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
311 | hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); | |
312 | ||
313 | atomic_inc(&crypt->refcnt); | |
314 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); | |
315 | atomic_dec(&crypt->refcnt); | |
316 | if (res < 0) { | |
317 | netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n", | |
318 | hdr->addr2, res); | |
319 | if (res == -2) | |
320 | netdev_dbg(ieee->dev, | |
321 | "Decryption failed ICV mismatch (key %d)\n", | |
322 | skb->data[hdrlen + 3] >> 6); | |
323 | return -1; | |
324 | } | |
325 | ||
326 | return res; | |
327 | } | |
328 | ||
329 | ||
330 | /* Called only as a tasklet (software IRQ), by rtllib_rx */ | |
331 | static inline int | |
332 | rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb, | |
333 | int keyidx, struct lib80211_crypt_data *crypt) | |
334 | { | |
335 | struct rtllib_hdr_4addr *hdr; | |
336 | int res, hdrlen; | |
337 | ||
338 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) | |
339 | return 0; | |
340 | if (ieee->hwsec_active) { | |
341 | struct cb_desc *tcb_desc = (struct cb_desc *) | |
342 | (skb->cb + MAX_DEV_ADDR_SIZE); | |
343 | ||
344 | tcb_desc->bHwSec = 1; | |
345 | ||
346 | if (ieee->need_sw_enc) | |
347 | tcb_desc->bHwSec = 0; | |
348 | } | |
349 | ||
350 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
351 | hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); | |
352 | ||
353 | atomic_inc(&crypt->refcnt); | |
354 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); | |
355 | atomic_dec(&crypt->refcnt); | |
356 | if (res < 0) { | |
357 | netdev_dbg(ieee->dev, | |
358 | "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n", | |
359 | hdr->addr2, keyidx); | |
360 | return -1; | |
361 | } | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | ||
367 | /* this function is stolen from ipw2200 driver*/ | |
368 | #define IEEE_PACKET_RETRY_TIME (5*HZ) | |
369 | static int is_duplicate_packet(struct rtllib_device *ieee, | |
370 | struct rtllib_hdr_4addr *header) | |
371 | { | |
372 | u16 fc = le16_to_cpu(header->frame_ctl); | |
373 | u16 sc = le16_to_cpu(header->seq_ctl); | |
374 | u16 seq = WLAN_GET_SEQ_SEQ(sc); | |
375 | u16 frag = WLAN_GET_SEQ_FRAG(sc); | |
376 | u16 *last_seq, *last_frag; | |
377 | unsigned long *last_time; | |
378 | struct rtllib_hdr_3addrqos *hdr_3addrqos; | |
379 | struct rtllib_hdr_4addrqos *hdr_4addrqos; | |
380 | u8 tid; | |
381 | ||
382 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && | |
383 | RTLLIB_QOS_HAS_SEQ(fc)) { | |
384 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header; | |
385 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
386 | tid = UP2AC(tid); | |
387 | tid++; | |
388 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { | |
389 | hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header; | |
390 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; | |
391 | tid = UP2AC(tid); | |
392 | tid++; | |
393 | } else { | |
394 | tid = 0; | |
395 | } | |
396 | ||
397 | switch (ieee->iw_mode) { | |
398 | case IW_MODE_ADHOC: | |
399 | { | |
400 | struct list_head *p; | |
401 | struct ieee_ibss_seq *entry = NULL; | |
402 | u8 *mac = header->addr2; | |
403 | int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; | |
404 | ||
405 | list_for_each(p, &ieee->ibss_mac_hash[index]) { | |
406 | entry = list_entry(p, struct ieee_ibss_seq, list); | |
407 | if (!memcmp(entry->mac, mac, ETH_ALEN)) | |
408 | break; | |
409 | } | |
410 | if (p == &ieee->ibss_mac_hash[index]) { | |
411 | entry = kmalloc(sizeof(struct ieee_ibss_seq), | |
412 | GFP_ATOMIC); | |
413 | if (!entry) | |
414 | return 0; | |
415 | ||
416 | ether_addr_copy(entry->mac, mac); | |
417 | entry->seq_num[tid] = seq; | |
418 | entry->frag_num[tid] = frag; | |
419 | entry->packet_time[tid] = jiffies; | |
420 | list_add(&entry->list, &ieee->ibss_mac_hash[index]); | |
421 | return 0; | |
422 | } | |
423 | last_seq = &entry->seq_num[tid]; | |
424 | last_frag = &entry->frag_num[tid]; | |
425 | last_time = &entry->packet_time[tid]; | |
426 | break; | |
427 | } | |
428 | ||
429 | case IW_MODE_INFRA: | |
430 | last_seq = &ieee->last_rxseq_num[tid]; | |
431 | last_frag = &ieee->last_rxfrag_num[tid]; | |
432 | last_time = &ieee->last_packet_time[tid]; | |
433 | break; | |
434 | default: | |
435 | return 0; | |
436 | } | |
437 | ||
438 | if ((*last_seq == seq) && | |
439 | time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { | |
440 | if (*last_frag == frag) | |
441 | goto drop; | |
442 | if (*last_frag + 1 != frag) | |
443 | /* out-of-order fragment */ | |
444 | goto drop; | |
445 | } else | |
446 | *last_seq = seq; | |
447 | ||
448 | *last_frag = frag; | |
449 | *last_time = jiffies; | |
450 | return 0; | |
451 | ||
452 | drop: | |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | static bool AddReorderEntry(struct rx_ts_record *pTS, | |
458 | struct rx_reorder_entry *pReorderEntry) | |
459 | { | |
460 | struct list_head *pList = &pTS->RxPendingPktList; | |
461 | ||
462 | while (pList->next != &pTS->RxPendingPktList) { | |
463 | if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *) | |
464 | list_entry(pList->next, struct rx_reorder_entry, | |
465 | List))->SeqNum)) | |
466 | pList = pList->next; | |
467 | else if (SN_EQUAL(pReorderEntry->SeqNum, | |
468 | ((struct rx_reorder_entry *)list_entry(pList->next, | |
469 | struct rx_reorder_entry, List))->SeqNum)) | |
470 | return false; | |
471 | else | |
472 | break; | |
473 | } | |
474 | pReorderEntry->List.next = pList->next; | |
475 | pReorderEntry->List.next->prev = &pReorderEntry->List; | |
476 | pReorderEntry->List.prev = pList; | |
477 | pList->next = &pReorderEntry->List; | |
478 | ||
479 | return true; | |
480 | } | |
481 | ||
482 | void rtllib_indicate_packets(struct rtllib_device *ieee, | |
483 | struct rtllib_rxb **prxbIndicateArray, u8 index) | |
484 | { | |
485 | struct net_device_stats *stats = &ieee->stats; | |
486 | u8 i = 0, j = 0; | |
487 | u16 ethertype; | |
488 | ||
489 | for (j = 0; j < index; j++) { | |
490 | struct rtllib_rxb *prxb = prxbIndicateArray[j]; | |
491 | ||
492 | for (i = 0; i < prxb->nr_subframes; i++) { | |
493 | struct sk_buff *sub_skb = prxb->subframes[i]; | |
494 | ||
495 | /* convert hdr + possible LLC headers into Ethernet header */ | |
496 | ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; | |
497 | if (sub_skb->len >= 8 && | |
498 | ((memcmp(sub_skb->data, rfc1042_header, | |
499 | SNAP_SIZE) == 0 && | |
500 | ethertype != ETH_P_AARP && | |
501 | ethertype != ETH_P_IPX) || | |
502 | memcmp(sub_skb->data, bridge_tunnel_header, | |
503 | SNAP_SIZE) == 0)) { | |
504 | /* remove RFC1042 or Bridge-Tunnel encapsulation | |
505 | * and replace EtherType | |
506 | */ | |
507 | skb_pull(sub_skb, SNAP_SIZE); | |
508 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); | |
509 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); | |
510 | } else { | |
511 | u16 len; | |
512 | /* Leave Ethernet header part of hdr and full payload */ | |
513 | len = sub_skb->len; | |
514 | memcpy(skb_push(sub_skb, 2), &len, 2); | |
515 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); | |
516 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); | |
517 | } | |
518 | ||
519 | /* Indicate the packets to upper layer */ | |
520 | if (sub_skb) { | |
521 | stats->rx_packets++; | |
522 | stats->rx_bytes += sub_skb->len; | |
523 | ||
524 | memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); | |
525 | sub_skb->protocol = eth_type_trans(sub_skb, | |
526 | ieee->dev); | |
527 | sub_skb->dev = ieee->dev; | |
528 | sub_skb->dev->stats.rx_packets++; | |
529 | sub_skb->dev->stats.rx_bytes += sub_skb->len; | |
530 | /* 802.11 crc not sufficient */ | |
531 | sub_skb->ip_summed = CHECKSUM_NONE; | |
532 | ieee->last_rx_ps_time = jiffies; | |
533 | netif_rx(sub_skb); | |
534 | } | |
535 | } | |
536 | kfree(prxb); | |
537 | prxb = NULL; | |
538 | } | |
539 | } | |
540 | ||
541 | void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, | |
542 | struct rx_ts_record *pTS) | |
543 | { | |
544 | struct rx_reorder_entry *pRxReorderEntry; | |
545 | u8 RfdCnt = 0; | |
546 | ||
547 | del_timer_sync(&pTS->RxPktPendingTimer); | |
548 | while (!list_empty(&pTS->RxPendingPktList)) { | |
549 | if (RfdCnt >= REORDER_WIN_SIZE) { | |
550 | netdev_info(ieee->dev, | |
551 | "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", | |
552 | __func__); | |
553 | break; | |
554 | } | |
555 | ||
556 | pRxReorderEntry = (struct rx_reorder_entry *) | |
557 | list_entry(pTS->RxPendingPktList.prev, | |
558 | struct rx_reorder_entry, List); | |
559 | netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__, | |
560 | pRxReorderEntry->SeqNum); | |
561 | list_del_init(&pRxReorderEntry->List); | |
562 | ||
563 | ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb; | |
564 | ||
565 | RfdCnt = RfdCnt + 1; | |
566 | list_add_tail(&pRxReorderEntry->List, | |
567 | &ieee->RxReorder_Unused_List); | |
568 | } | |
569 | rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt); | |
570 | ||
571 | pTS->RxIndicateSeq = 0xffff; | |
572 | } | |
573 | ||
574 | static void RxReorderIndicatePacket(struct rtllib_device *ieee, | |
575 | struct rtllib_rxb *prxb, | |
576 | struct rx_ts_record *pTS, u16 SeqNum) | |
577 | { | |
578 | struct rt_hi_throughput *pHTInfo = ieee->pHTInfo; | |
579 | struct rx_reorder_entry *pReorderEntry = NULL; | |
580 | u8 WinSize = pHTInfo->RxReorderWinSize; | |
581 | u16 WinEnd = 0; | |
582 | u8 index = 0; | |
583 | bool bMatchWinStart = false, bPktInBuf = false; | |
584 | unsigned long flags; | |
585 | ||
586 | netdev_dbg(ieee->dev, | |
587 | "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n", | |
588 | __func__, SeqNum, pTS->RxIndicateSeq, WinSize); | |
589 | ||
590 | spin_lock_irqsave(&(ieee->reorder_spinlock), flags); | |
591 | ||
592 | WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096; | |
593 | /* Rx Reorder initialize condition.*/ | |
594 | if (pTS->RxIndicateSeq == 0xffff) | |
595 | pTS->RxIndicateSeq = SeqNum; | |
596 | ||
597 | /* Drop out the packet which SeqNum is smaller than WinStart */ | |
598 | if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) { | |
599 | netdev_dbg(ieee->dev, | |
600 | "Packet Drop! IndicateSeq: %d, NewSeq: %d\n", | |
601 | pTS->RxIndicateSeq, SeqNum); | |
602 | pHTInfo->RxReorderDropCounter++; | |
603 | { | |
604 | int i; | |
605 | ||
606 | for (i = 0; i < prxb->nr_subframes; i++) | |
607 | dev_kfree_skb(prxb->subframes[i]); | |
608 | kfree(prxb); | |
609 | prxb = NULL; | |
610 | } | |
611 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); | |
612 | return; | |
613 | } | |
614 | ||
615 | /* Sliding window manipulation. Conditions includes: | |
616 | * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 | |
617 | * 2. Incoming SeqNum is larger than the WinEnd => Window shift N | |
618 | */ | |
619 | if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) { | |
620 | pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096; | |
621 | bMatchWinStart = true; | |
622 | } else if (SN_LESS(WinEnd, SeqNum)) { | |
623 | if (SeqNum >= (WinSize - 1)) | |
624 | pTS->RxIndicateSeq = SeqNum + 1 - WinSize; | |
625 | else | |
626 | pTS->RxIndicateSeq = 4095 - | |
627 | (WinSize - (SeqNum + 1)) + 1; | |
628 | netdev_dbg(ieee->dev, | |
629 | "Window Shift! IndicateSeq: %d, NewSeq: %d\n", | |
630 | pTS->RxIndicateSeq, SeqNum); | |
631 | } | |
632 | ||
633 | /* Indication process. | |
634 | * After Packet dropping and Sliding Window shifting as above, we can | |
635 | * now just indicate the packets with the SeqNum smaller than latest | |
636 | * WinStart and struct buffer other packets. | |
637 | * | |
638 | * For Rx Reorder condition: | |
639 | * 1. All packets with SeqNum smaller than WinStart => Indicate | |
640 | * 2. All packets with SeqNum larger than or equal to | |
641 | * WinStart => Buffer it. | |
642 | */ | |
643 | if (bMatchWinStart) { | |
644 | /* Current packet is going to be indicated.*/ | |
645 | netdev_dbg(ieee->dev, | |
646 | "Packets indication! IndicateSeq: %d, NewSeq: %d\n", | |
647 | pTS->RxIndicateSeq, SeqNum); | |
648 | ieee->prxbIndicateArray[0] = prxb; | |
649 | index = 1; | |
650 | } else { | |
651 | /* Current packet is going to be inserted into pending list.*/ | |
652 | if (!list_empty(&ieee->RxReorder_Unused_List)) { | |
653 | pReorderEntry = (struct rx_reorder_entry *) | |
654 | list_entry(ieee->RxReorder_Unused_List.next, | |
655 | struct rx_reorder_entry, List); | |
656 | list_del_init(&pReorderEntry->List); | |
657 | ||
658 | /* Make a reorder entry and insert | |
659 | * into a the packet list. | |
660 | */ | |
661 | pReorderEntry->SeqNum = SeqNum; | |
662 | pReorderEntry->prxb = prxb; | |
663 | ||
664 | if (!AddReorderEntry(pTS, pReorderEntry)) { | |
665 | int i; | |
666 | ||
667 | netdev_dbg(ieee->dev, | |
668 | "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n", | |
669 | __func__, pTS->RxIndicateSeq, | |
670 | SeqNum); | |
671 | list_add_tail(&pReorderEntry->List, | |
672 | &ieee->RxReorder_Unused_List); | |
673 | ||
674 | for (i = 0; i < prxb->nr_subframes; i++) | |
675 | dev_kfree_skb(prxb->subframes[i]); | |
676 | kfree(prxb); | |
677 | prxb = NULL; | |
678 | } else { | |
679 | netdev_dbg(ieee->dev, | |
680 | "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n", | |
681 | pTS->RxIndicateSeq, SeqNum); | |
682 | } | |
683 | } else { | |
684 | /* Packets are dropped if there are not enough reorder | |
685 | * entries. This part should be modified!! We can just | |
686 | * indicate all the packets in struct buffer and get | |
687 | * reorder entries. | |
688 | */ | |
689 | netdev_err(ieee->dev, | |
690 | "%s(): There is no reorder entry! Packet is dropped!\n", | |
691 | __func__); | |
692 | { | |
693 | int i; | |
694 | ||
695 | for (i = 0; i < prxb->nr_subframes; i++) | |
696 | dev_kfree_skb(prxb->subframes[i]); | |
697 | kfree(prxb); | |
698 | prxb = NULL; | |
699 | } | |
700 | } | |
701 | } | |
702 | ||
703 | /* Check if there is any packet need indicate.*/ | |
704 | while (!list_empty(&pTS->RxPendingPktList)) { | |
705 | netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n", | |
706 | __func__); | |
707 | ||
708 | pReorderEntry = (struct rx_reorder_entry *) | |
709 | list_entry(pTS->RxPendingPktList.prev, | |
710 | struct rx_reorder_entry, | |
711 | List); | |
712 | if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) || | |
713 | SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) { | |
714 | /* This protect struct buffer from overflow. */ | |
715 | if (index >= REORDER_WIN_SIZE) { | |
716 | netdev_err(ieee->dev, | |
717 | "%s(): Buffer overflow!\n", | |
718 | __func__); | |
719 | bPktInBuf = true; | |
720 | break; | |
721 | } | |
722 | ||
723 | list_del_init(&pReorderEntry->List); | |
724 | ||
725 | if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) | |
726 | pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % | |
727 | 4096; | |
728 | ||
729 | ieee->prxbIndicateArray[index] = pReorderEntry->prxb; | |
730 | netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", | |
731 | __func__, pReorderEntry->SeqNum); | |
732 | index++; | |
733 | ||
734 | list_add_tail(&pReorderEntry->List, | |
735 | &ieee->RxReorder_Unused_List); | |
736 | } else { | |
737 | bPktInBuf = true; | |
738 | break; | |
739 | } | |
740 | } | |
741 | ||
742 | /* Handling pending timer. Set this timer to prevent from long time | |
743 | * Rx buffering. | |
744 | */ | |
745 | if (index > 0) { | |
746 | if (timer_pending(&pTS->RxPktPendingTimer)) | |
747 | del_timer_sync(&pTS->RxPktPendingTimer); | |
748 | pTS->RxTimeoutIndicateSeq = 0xffff; | |
749 | ||
750 | if (index > REORDER_WIN_SIZE) { | |
751 | netdev_err(ieee->dev, | |
752 | "%s(): Rx Reorder struct buffer full!\n", | |
753 | __func__); | |
754 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), | |
755 | flags); | |
756 | return; | |
757 | } | |
758 | rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index); | |
759 | bPktInBuf = false; | |
760 | } | |
761 | ||
762 | if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) { | |
763 | netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__); | |
764 | pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq; | |
765 | mod_timer(&pTS->RxPktPendingTimer, jiffies + | |
766 | msecs_to_jiffies(pHTInfo->RxReorderPendingTime)); | |
767 | } | |
768 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); | |
769 | } | |
770 | ||
771 | static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb, | |
772 | struct rtllib_rx_stats *rx_stats, | |
773 | struct rtllib_rxb *rxb, u8 *src, u8 *dst) | |
774 | { | |
775 | struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data; | |
776 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
777 | ||
778 | u16 LLCOffset = sizeof(struct rtllib_hdr_3addr); | |
779 | u16 ChkLength; | |
780 | bool bIsAggregateFrame = false; | |
781 | u16 nSubframe_Length; | |
782 | u8 nPadding_Length = 0; | |
783 | u16 SeqNum = 0; | |
784 | struct sk_buff *sub_skb; | |
785 | /* just for debug purpose */ | |
786 | SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl)); | |
787 | if ((RTLLIB_QOS_HAS_SEQ(fc)) && | |
788 | (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) | |
789 | bIsAggregateFrame = true; | |
790 | ||
791 | if (RTLLIB_QOS_HAS_SEQ(fc)) | |
792 | LLCOffset += 2; | |
793 | if (rx_stats->bContainHTC) | |
794 | LLCOffset += sHTCLng; | |
795 | ||
796 | ChkLength = LLCOffset; | |
797 | ||
798 | if (skb->len <= ChkLength) | |
799 | return 0; | |
800 | ||
801 | skb_pull(skb, LLCOffset); | |
802 | ieee->bIsAggregateFrame = bIsAggregateFrame; | |
803 | if (!bIsAggregateFrame) { | |
804 | rxb->nr_subframes = 1; | |
805 | ||
806 | /* altered by clark 3/30/2010 | |
807 | * The struct buffer size of the skb indicated to upper layer | |
808 | * must be less than 5000, or the defraged IP datagram | |
809 | * in the IP layer will exceed "ipfrag_high_tresh" and be | |
810 | * discarded. so there must not use the function | |
811 | * "skb_copy" and "skb_clone" for "skb". | |
812 | */ | |
813 | ||
814 | /* Allocate new skb for releasing to upper layer */ | |
815 | sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE); | |
816 | if (!sub_skb) | |
817 | return 0; | |
818 | skb_reserve(sub_skb, 12); | |
819 | skb_put_data(sub_skb, skb->data, skb->len); | |
820 | sub_skb->dev = ieee->dev; | |
821 | ||
822 | rxb->subframes[0] = sub_skb; | |
823 | ||
824 | memcpy(rxb->src, src, ETH_ALEN); | |
825 | memcpy(rxb->dst, dst, ETH_ALEN); | |
826 | rxb->subframes[0]->dev = ieee->dev; | |
827 | return 1; | |
828 | } | |
829 | ||
830 | rxb->nr_subframes = 0; | |
831 | memcpy(rxb->src, src, ETH_ALEN); | |
832 | memcpy(rxb->dst, dst, ETH_ALEN); | |
833 | while (skb->len > ETHERNET_HEADER_SIZE) { | |
834 | /* Offset 12 denote 2 mac address */ | |
835 | nSubframe_Length = *((u16 *)(skb->data + 12)); | |
836 | nSubframe_Length = (nSubframe_Length >> 8) + | |
837 | (nSubframe_Length << 8); | |
838 | ||
839 | if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { | |
840 | netdev_info(ieee->dev, | |
841 | "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", | |
842 | __func__, rxb->nr_subframes); | |
843 | netdev_info(ieee->dev, | |
844 | "%s: A-MSDU parse error!! Subframe Length: %d\n", | |
845 | __func__, nSubframe_Length); | |
846 | netdev_info(ieee->dev, | |
847 | "nRemain_Length is %d and nSubframe_Length is : %d\n", | |
848 | skb->len, nSubframe_Length); | |
849 | netdev_info(ieee->dev, | |
850 | "The Packet SeqNum is %d\n", | |
851 | SeqNum); | |
852 | return 0; | |
853 | } | |
854 | ||
855 | /* move the data point to data content */ | |
856 | skb_pull(skb, ETHERNET_HEADER_SIZE); | |
857 | ||
858 | /* altered by clark 3/30/2010 | |
859 | * The struct buffer size of the skb indicated to upper layer | |
860 | * must be less than 5000, or the defraged IP datagram | |
861 | * in the IP layer will exceed "ipfrag_high_tresh" and be | |
862 | * discarded. so there must not use the function | |
863 | * "skb_copy" and "skb_clone" for "skb". | |
864 | */ | |
865 | ||
866 | /* Allocate new skb for releasing to upper layer */ | |
867 | sub_skb = dev_alloc_skb(nSubframe_Length + 12); | |
868 | if (!sub_skb) | |
869 | return 0; | |
870 | skb_reserve(sub_skb, 12); | |
871 | skb_put_data(sub_skb, skb->data, nSubframe_Length); | |
872 | ||
873 | sub_skb->dev = ieee->dev; | |
874 | rxb->subframes[rxb->nr_subframes++] = sub_skb; | |
875 | if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { | |
876 | netdev_dbg(ieee->dev, | |
877 | "ParseSubframe(): Too many Subframes! Packets dropped!\n"); | |
878 | break; | |
879 | } | |
880 | skb_pull(skb, nSubframe_Length); | |
881 | ||
882 | if (skb->len != 0) { | |
883 | nPadding_Length = 4 - ((nSubframe_Length + | |
884 | ETHERNET_HEADER_SIZE) % 4); | |
885 | if (nPadding_Length == 4) | |
886 | nPadding_Length = 0; | |
887 | ||
888 | if (skb->len < nPadding_Length) | |
889 | return 0; | |
890 | ||
891 | skb_pull(skb, nPadding_Length); | |
892 | } | |
893 | } | |
894 | ||
895 | return rxb->nr_subframes; | |
896 | } | |
897 | ||
898 | ||
899 | static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, | |
900 | struct sk_buff *skb, | |
901 | struct rtllib_rx_stats *rx_stats) | |
902 | { | |
903 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; | |
904 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
905 | size_t hdrlen; | |
906 | ||
907 | hdrlen = rtllib_get_hdrlen(fc); | |
908 | if (HTCCheck(ieee, skb->data)) { | |
909 | if (net_ratelimit()) | |
910 | netdev_info(ieee->dev, "%s: find HTCControl!\n", | |
911 | __func__); | |
912 | hdrlen += 4; | |
913 | rx_stats->bContainHTC = true; | |
914 | } | |
915 | ||
916 | if (RTLLIB_QOS_HAS_SEQ(fc)) | |
917 | rx_stats->bIsQosData = true; | |
918 | ||
919 | return hdrlen; | |
920 | } | |
921 | ||
922 | static int rtllib_rx_check_duplicate(struct rtllib_device *ieee, | |
923 | struct sk_buff *skb, u8 multicast) | |
924 | { | |
925 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; | |
926 | u16 fc, sc; | |
927 | u8 frag, type, stype; | |
928 | ||
929 | fc = le16_to_cpu(hdr->frame_ctl); | |
930 | type = WLAN_FC_GET_TYPE(fc); | |
931 | stype = WLAN_FC_GET_STYPE(fc); | |
932 | sc = le16_to_cpu(hdr->seq_ctl); | |
933 | frag = WLAN_GET_SEQ_FRAG(sc); | |
934 | ||
935 | if ((ieee->pHTInfo->bCurRxReorderEnable == false) || | |
936 | !ieee->current_network.qos_data.active || | |
937 | !IsDataFrame(skb->data) || | |
938 | IsLegacyDataFrame(skb->data)) { | |
939 | if (!((type == RTLLIB_FTYPE_MGMT) && | |
940 | (stype == RTLLIB_STYPE_BEACON))) { | |
941 | if (is_duplicate_packet(ieee, hdr)) | |
942 | return -1; | |
943 | } | |
944 | } else { | |
945 | struct rx_ts_record *pRxTS = NULL; | |
946 | ||
947 | if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2, | |
948 | (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) { | |
949 | if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) && | |
950 | (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) | |
951 | return -1; | |
952 | pRxTS->RxLastFragNum = frag; | |
953 | pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc); | |
954 | } else { | |
955 | netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n", | |
956 | __func__); | |
957 | return -1; | |
958 | } | |
959 | } | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | static void rtllib_rx_extract_addr(struct rtllib_device *ieee, | |
965 | struct rtllib_hdr_4addr *hdr, u8 *dst, | |
966 | u8 *src, u8 *bssid) | |
967 | { | |
968 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
969 | ||
970 | switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) { | |
971 | case RTLLIB_FCTL_FROMDS: | |
972 | ether_addr_copy(dst, hdr->addr1); | |
973 | ether_addr_copy(src, hdr->addr3); | |
974 | ether_addr_copy(bssid, hdr->addr2); | |
975 | break; | |
976 | case RTLLIB_FCTL_TODS: | |
977 | ether_addr_copy(dst, hdr->addr3); | |
978 | ether_addr_copy(src, hdr->addr2); | |
979 | ether_addr_copy(bssid, hdr->addr1); | |
980 | break; | |
981 | case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS: | |
982 | ether_addr_copy(dst, hdr->addr3); | |
983 | ether_addr_copy(src, hdr->addr4); | |
984 | ether_addr_copy(bssid, ieee->current_network.bssid); | |
985 | break; | |
986 | default: | |
987 | ether_addr_copy(dst, hdr->addr1); | |
988 | ether_addr_copy(src, hdr->addr2); | |
989 | ether_addr_copy(bssid, hdr->addr3); | |
990 | break; | |
991 | } | |
992 | } | |
993 | ||
994 | static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, | |
995 | u8 *dst, u8 *src, u8 *bssid, u8 *addr2) | |
996 | { | |
997 | u8 type, stype; | |
998 | ||
999 | type = WLAN_FC_GET_TYPE(fc); | |
1000 | stype = WLAN_FC_GET_STYPE(fc); | |
1001 | ||
1002 | /* Filter frames from different BSS */ | |
1003 | if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) && | |
1004 | !ether_addr_equal(ieee->current_network.bssid, bssid) && | |
1005 | !is_zero_ether_addr(ieee->current_network.bssid)) { | |
1006 | return -1; | |
1007 | } | |
1008 | ||
1009 | /* Filter packets sent by an STA that will be forwarded by AP */ | |
1010 | if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn && | |
1011 | ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) { | |
1012 | if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) && | |
1013 | !ether_addr_equal(dst, ieee->current_network.bssid) && | |
1014 | ether_addr_equal(bssid, ieee->current_network.bssid)) { | |
1015 | return -1; | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | /* Nullfunc frames may have PS-bit set, so they must be passed to | |
1020 | * hostap_handle_sta_rx() before being dropped here. | |
1021 | */ | |
1022 | if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) { | |
1023 | if (stype != RTLLIB_STYPE_DATA && | |
1024 | stype != RTLLIB_STYPE_DATA_CFACK && | |
1025 | stype != RTLLIB_STYPE_DATA_CFPOLL && | |
1026 | stype != RTLLIB_STYPE_DATA_CFACKPOLL && | |
1027 | stype != RTLLIB_STYPE_QOS_DATA) { | |
1028 | if (stype != RTLLIB_STYPE_NULLFUNC) | |
1029 | netdev_dbg(ieee->dev, | |
1030 | "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n", | |
1031 | type, stype); | |
1032 | return -1; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | if (ieee->iw_mode != IW_MODE_MESH) { | |
1037 | /* packets from our adapter are dropped (echo) */ | |
1038 | if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN)) | |
1039 | return -1; | |
1040 | ||
1041 | /* {broad,multi}cast packets to our BSS go through */ | |
1042 | if (is_multicast_ether_addr(dst)) { | |
1043 | if (memcmp(bssid, ieee->current_network.bssid, | |
1044 | ETH_ALEN)) | |
1045 | return -1; | |
1046 | } | |
1047 | } | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb, | |
1052 | struct lib80211_crypt_data **crypt, size_t hdrlen) | |
1053 | { | |
1054 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; | |
1055 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
1056 | int idx = 0; | |
1057 | ||
1058 | if (ieee->host_decrypt) { | |
1059 | if (skb->len >= hdrlen + 3) | |
1060 | idx = skb->data[hdrlen + 3] >> 6; | |
1061 | ||
1062 | *crypt = ieee->crypt_info.crypt[idx]; | |
1063 | /* allow NULL decrypt to indicate an station specific override | |
1064 | * for default encryption | |
1065 | */ | |
1066 | if (*crypt && ((*crypt)->ops == NULL || | |
1067 | (*crypt)->ops->decrypt_mpdu == NULL)) | |
1068 | *crypt = NULL; | |
1069 | ||
1070 | if (!*crypt && (fc & RTLLIB_FCTL_WEP)) { | |
1071 | /* This seems to be triggered by some (multicast?) | |
1072 | * frames from other than current BSS, so just drop the | |
1073 | * frames silently instead of filling system log with | |
1074 | * these reports. | |
1075 | */ | |
1076 | netdev_dbg(ieee->dev, | |
1077 | "Decryption failed (not set) (SA= %pM)\n", | |
1078 | hdr->addr2); | |
1079 | return -1; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, | |
1087 | struct rtllib_rx_stats *rx_stats, | |
1088 | struct lib80211_crypt_data *crypt, size_t hdrlen) | |
1089 | { | |
1090 | struct rtllib_hdr_4addr *hdr; | |
1091 | int keyidx = 0; | |
1092 | u16 fc, sc; | |
1093 | u8 frag; | |
1094 | ||
1095 | hdr = (struct rtllib_hdr_4addr *)skb->data; | |
1096 | fc = le16_to_cpu(hdr->frame_ctl); | |
1097 | sc = le16_to_cpu(hdr->seq_ctl); | |
1098 | frag = WLAN_GET_SEQ_FRAG(sc); | |
1099 | ||
1100 | if ((!rx_stats->Decrypted)) | |
1101 | ieee->need_sw_enc = 1; | |
1102 | else | |
1103 | ieee->need_sw_enc = 0; | |
1104 | ||
1105 | keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt); | |
1106 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) { | |
1107 | netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__); | |
1108 | return -1; | |
1109 | } | |
1110 | ||
1111 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
1112 | if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) { | |
1113 | int flen; | |
1114 | struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); | |
1115 | ||
1116 | netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag); | |
1117 | ||
1118 | if (!frag_skb) { | |
1119 | netdev_dbg(ieee->dev, | |
1120 | "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n", | |
1121 | (fc & RTLLIB_FCTL_MOREFRAGS) != 0, | |
1122 | WLAN_GET_SEQ_SEQ(sc), frag); | |
1123 | return -1; | |
1124 | } | |
1125 | flen = skb->len; | |
1126 | if (frag != 0) | |
1127 | flen -= hdrlen; | |
1128 | ||
1129 | if (frag_skb->tail + flen > frag_skb->end) { | |
1130 | netdev_warn(ieee->dev, | |
1131 | "%s: host decrypted and reassembled frame did not fit skb\n", | |
1132 | __func__); | |
1133 | rtllib_frag_cache_invalidate(ieee, hdr); | |
1134 | return -1; | |
1135 | } | |
1136 | ||
1137 | if (frag == 0) { | |
1138 | /* copy first fragment (including full headers) into | |
1139 | * beginning of the fragment cache skb | |
1140 | */ | |
1141 | skb_put_data(frag_skb, skb->data, flen); | |
1142 | } else { | |
1143 | /* append frame payload to the end of the fragment | |
1144 | * cache skb | |
1145 | */ | |
1146 | skb_put_data(frag_skb, skb->data + hdrlen, flen); | |
1147 | } | |
1148 | dev_kfree_skb_any(skb); | |
1149 | skb = NULL; | |
1150 | ||
1151 | if (fc & RTLLIB_FCTL_MOREFRAGS) { | |
1152 | /* more fragments expected - leave the skb in fragment | |
1153 | * cache for now; it will be delivered to upper layers | |
1154 | * after all fragments have been received | |
1155 | */ | |
1156 | return -2; | |
1157 | } | |
1158 | ||
1159 | /* this was the last fragment and the frame will be | |
1160 | * delivered, so remove skb from fragment cache | |
1161 | */ | |
1162 | skb = frag_skb; | |
1163 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
1164 | rtllib_frag_cache_invalidate(ieee, hdr); | |
1165 | } | |
1166 | ||
1167 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still | |
1168 | * encrypted/authenticated | |
1169 | */ | |
1170 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && | |
1171 | rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { | |
1172 | netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__); | |
1173 | return -1; | |
1174 | } | |
1175 | ||
1176 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
1177 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) { | |
1178 | if (/*ieee->ieee802_1x &&*/ | |
1179 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { | |
1180 | ||
1181 | /* pass unencrypted EAPOL frames even if encryption is | |
1182 | * configured | |
1183 | */ | |
1184 | struct eapol *eap = (struct eapol *)(skb->data + | |
1185 | 24); | |
1186 | netdev_dbg(ieee->dev, | |
1187 | "RX: IEEE 802.1X EAPOL frame: %s\n", | |
1188 | eap_get_type(eap->type)); | |
1189 | } else { | |
1190 | netdev_dbg(ieee->dev, | |
1191 | "encryption configured, but RX frame not encrypted (SA= %pM)\n", | |
1192 | hdr->addr2); | |
1193 | return -1; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && | |
1198 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { | |
1199 | struct eapol *eap = (struct eapol *)(skb->data + 24); | |
1200 | ||
1201 | netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n", | |
1202 | eap_get_type(eap->type)); | |
1203 | } | |
1204 | ||
1205 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep && | |
1206 | !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { | |
1207 | netdev_dbg(ieee->dev, | |
1208 | "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n", | |
1209 | hdr->addr2); | |
1210 | return -1; | |
1211 | } | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, | |
1217 | u8 nr_subframes) | |
1218 | { | |
1219 | if (unicast) { | |
1220 | ||
1221 | if (ieee->state == RTLLIB_LINKED) { | |
1222 | if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod + | |
1223 | ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) || | |
1224 | (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) { | |
1225 | if (ieee->LeisurePSLeave) | |
1226 | ieee->LeisurePSLeave(ieee->dev); | |
1227 | } | |
1228 | } | |
1229 | } | |
1230 | ieee->last_rx_ps_time = jiffies; | |
1231 | } | |
1232 | ||
1233 | static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee, | |
1234 | struct rtllib_rx_stats *rx_stats, | |
1235 | struct rtllib_rxb *rxb, | |
1236 | u8 *dst, | |
1237 | u8 *src) | |
1238 | { | |
1239 | struct net_device *dev = ieee->dev; | |
1240 | u16 ethertype; | |
1241 | int i = 0; | |
1242 | ||
1243 | if (rxb == NULL) { | |
1244 | netdev_info(dev, "%s: rxb is NULL!!\n", __func__); | |
1245 | return; | |
1246 | } | |
1247 | ||
1248 | for (i = 0; i < rxb->nr_subframes; i++) { | |
1249 | struct sk_buff *sub_skb = rxb->subframes[i]; | |
1250 | ||
1251 | if (sub_skb) { | |
1252 | /* convert hdr + possible LLC headers | |
1253 | * into Ethernet header | |
1254 | */ | |
1255 | ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; | |
1256 | if (sub_skb->len >= 8 && | |
1257 | ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && | |
1258 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
1259 | memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { | |
1260 | /* remove RFC1042 or Bridge-Tunnel encapsulation | |
1261 | * and replace EtherType | |
1262 | */ | |
1263 | skb_pull(sub_skb, SNAP_SIZE); | |
1264 | ether_addr_copy(skb_push(sub_skb, ETH_ALEN), | |
1265 | src); | |
1266 | ether_addr_copy(skb_push(sub_skb, ETH_ALEN), | |
1267 | dst); | |
1268 | } else { | |
1269 | u16 len; | |
1270 | /* Leave Ethernet header part of hdr | |
1271 | * and full payload | |
1272 | */ | |
1273 | len = sub_skb->len; | |
1274 | memcpy(skb_push(sub_skb, 2), &len, 2); | |
1275 | ether_addr_copy(skb_push(sub_skb, ETH_ALEN), | |
1276 | src); | |
1277 | ether_addr_copy(skb_push(sub_skb, ETH_ALEN), | |
1278 | dst); | |
1279 | } | |
1280 | ||
1281 | ieee->stats.rx_packets++; | |
1282 | ieee->stats.rx_bytes += sub_skb->len; | |
1283 | ||
1284 | if (is_multicast_ether_addr(dst)) | |
1285 | ieee->stats.multicast++; | |
1286 | ||
1287 | /* Indicate the packets to upper layer */ | |
1288 | memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); | |
1289 | sub_skb->protocol = eth_type_trans(sub_skb, dev); | |
1290 | sub_skb->dev = dev; | |
1291 | sub_skb->dev->stats.rx_packets++; | |
1292 | sub_skb->dev->stats.rx_bytes += sub_skb->len; | |
1293 | /* 802.11 crc not sufficient */ | |
1294 | sub_skb->ip_summed = CHECKSUM_NONE; | |
1295 | netif_rx(sub_skb); | |
1296 | } | |
1297 | } | |
1298 | kfree(rxb); | |
1299 | } | |
1300 | ||
1301 | static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, | |
1302 | struct rtllib_rx_stats *rx_stats) | |
1303 | { | |
1304 | struct net_device *dev = ieee->dev; | |
1305 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; | |
1306 | struct lib80211_crypt_data *crypt = NULL; | |
1307 | struct rtllib_rxb *rxb = NULL; | |
1308 | struct rx_ts_record *pTS = NULL; | |
1309 | u16 fc, sc, SeqNum = 0; | |
1310 | u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0; | |
1311 | u8 *payload; | |
1312 | u8 dst[ETH_ALEN]; | |
1313 | u8 src[ETH_ALEN]; | |
1314 | u8 bssid[ETH_ALEN] = {0}; | |
1315 | ||
1316 | size_t hdrlen = 0; | |
1317 | bool bToOtherSTA = false; | |
1318 | int ret = 0, i = 0; | |
1319 | ||
1320 | fc = le16_to_cpu(hdr->frame_ctl); | |
1321 | type = WLAN_FC_GET_TYPE(fc); | |
1322 | stype = WLAN_FC_GET_STYPE(fc); | |
1323 | sc = le16_to_cpu(hdr->seq_ctl); | |
1324 | ||
1325 | /*Filter pkt not to me*/ | |
1326 | multicast = is_multicast_ether_addr(hdr->addr1); | |
1327 | unicast = !multicast; | |
1328 | if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) { | |
1329 | if (ieee->bNetPromiscuousMode) | |
1330 | bToOtherSTA = true; | |
1331 | else | |
1332 | goto rx_dropped; | |
1333 | } | |
1334 | ||
1335 | /*Filter pkt has too small length */ | |
1336 | hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats); | |
1337 | if (skb->len < hdrlen) { | |
1338 | netdev_info(dev, | |
1339 | "%s():ERR!!! skb->len is smaller than hdrlen\n", | |
1340 | __func__); | |
1341 | goto rx_dropped; | |
1342 | } | |
1343 | ||
1344 | /* Filter Duplicate pkt */ | |
1345 | ret = rtllib_rx_check_duplicate(ieee, skb, multicast); | |
1346 | if (ret < 0) | |
1347 | goto rx_dropped; | |
1348 | ||
1349 | /* Filter CTRL Frame */ | |
1350 | if (type == RTLLIB_FTYPE_CTL) | |
1351 | goto rx_dropped; | |
1352 | ||
1353 | /* Filter MGNT Frame */ | |
1354 | if (type == RTLLIB_FTYPE_MGMT) { | |
1355 | if (bToOtherSTA) | |
1356 | goto rx_dropped; | |
1357 | if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) | |
1358 | goto rx_dropped; | |
1359 | else | |
1360 | goto rx_exit; | |
1361 | } | |
1362 | ||
1363 | /* Filter WAPI DATA Frame */ | |
1364 | ||
1365 | /* Update statstics for AP roaming */ | |
1366 | if (!bToOtherSTA) { | |
1367 | ieee->LinkDetectInfo.NumRecvDataInPeriod++; | |
1368 | ieee->LinkDetectInfo.NumRxOkInPeriod++; | |
1369 | } | |
1370 | ||
1371 | /* Data frame - extract src/dst addresses */ | |
1372 | rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); | |
1373 | ||
1374 | /* Filter Data frames */ | |
1375 | ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2); | |
1376 | if (ret < 0) | |
1377 | goto rx_dropped; | |
1378 | ||
1379 | if (skb->len == hdrlen) | |
1380 | goto rx_dropped; | |
1381 | ||
1382 | /* Send pspoll based on moredata */ | |
1383 | if ((ieee->iw_mode == IW_MODE_INFRA) && | |
1384 | (ieee->sta_sleep == LPS_IS_SLEEP) && | |
1385 | (ieee->polling) && (!bToOtherSTA)) { | |
1386 | if (WLAN_FC_MORE_DATA(fc)) { | |
1387 | /* more data bit is set, let's request a new frame | |
1388 | * from the AP | |
1389 | */ | |
1390 | rtllib_sta_ps_send_pspoll_frame(ieee); | |
1391 | } else { | |
1392 | ieee->polling = false; | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* Get crypt if encrypted */ | |
1397 | ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen); | |
1398 | if (ret == -1) | |
1399 | goto rx_dropped; | |
1400 | ||
1401 | /* Decrypt data frame (including reassemble) */ | |
1402 | ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen); | |
1403 | if (ret == -1) | |
1404 | goto rx_dropped; | |
1405 | else if (ret == -2) | |
1406 | goto rx_exit; | |
1407 | ||
1408 | /* Get TS for Rx Reorder */ | |
1409 | hdr = (struct rtllib_hdr_4addr *) skb->data; | |
1410 | if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) | |
1411 | && !is_multicast_ether_addr(hdr->addr1) | |
1412 | && (!bToOtherSTA)) { | |
1413 | TID = Frame_QoSTID(skb->data); | |
1414 | SeqNum = WLAN_GET_SEQ_SEQ(sc); | |
1415 | GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, | |
1416 | RX_DIR, true); | |
1417 | if (TID != 0 && TID != 3) | |
1418 | ieee->bis_any_nonbepkts = true; | |
1419 | } | |
1420 | ||
1421 | /* Parse rx data frame (For AMSDU) */ | |
1422 | /* skb: hdr + (possible reassembled) full plaintext payload */ | |
1423 | payload = skb->data + hdrlen; | |
1424 | rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC); | |
1425 | if (!rxb) | |
1426 | goto rx_dropped; | |
1427 | ||
1428 | /* to parse amsdu packets */ | |
1429 | /* qos data packets & reserved bit is 1 */ | |
1430 | if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { | |
1431 | /* only to free rxb, and not submit the packets | |
1432 | * to upper layer | |
1433 | */ | |
1434 | for (i = 0; i < rxb->nr_subframes; i++) | |
1435 | dev_kfree_skb(rxb->subframes[i]); | |
1436 | kfree(rxb); | |
1437 | rxb = NULL; | |
1438 | goto rx_dropped; | |
1439 | } | |
1440 | ||
1441 | /* Update WAPI PN */ | |
1442 | ||
1443 | /* Check if leave LPS */ | |
1444 | if (!bToOtherSTA) { | |
1445 | if (ieee->bIsAggregateFrame) | |
1446 | nr_subframes = rxb->nr_subframes; | |
1447 | else | |
1448 | nr_subframes = 1; | |
1449 | if (unicast) | |
1450 | ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes; | |
1451 | rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes); | |
1452 | } | |
1453 | ||
1454 | /* Indicate packets to upper layer or Rx Reorder */ | |
1455 | if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || | |
1456 | bToOtherSTA) | |
1457 | rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src); | |
1458 | else | |
1459 | RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); | |
1460 | ||
1461 | dev_kfree_skb(skb); | |
1462 | ||
1463 | rx_exit: | |
1464 | return 1; | |
1465 | ||
1466 | rx_dropped: | |
1467 | ieee->stats.rx_dropped++; | |
1468 | ||
1469 | /* Returning 0 indicates to caller that we have not handled the SKB-- | |
1470 | * so it is still allocated and can be used again by underlying | |
1471 | * hardware as a DMA target | |
1472 | */ | |
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb, | |
1477 | struct rtllib_rx_stats *rx_stats) | |
1478 | { | |
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb, | |
1483 | struct rtllib_rx_stats *rx_stats) | |
1484 | { | |
1485 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; | |
1486 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
1487 | size_t hdrlen = rtllib_get_hdrlen(fc); | |
1488 | ||
1489 | if (skb->len < hdrlen) { | |
1490 | netdev_info(ieee->dev, | |
1491 | "%s():ERR!!! skb->len is smaller than hdrlen\n", | |
1492 | __func__); | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | if (HTCCheck(ieee, skb->data)) { | |
1497 | if (net_ratelimit()) | |
1498 | netdev_info(ieee->dev, "%s: Find HTCControl!\n", | |
1499 | __func__); | |
1500 | hdrlen += 4; | |
1501 | } | |
1502 | ||
1503 | rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen); | |
1504 | ieee->stats.rx_packets++; | |
1505 | ieee->stats.rx_bytes += skb->len; | |
1506 | ||
1507 | return 1; | |
1508 | } | |
1509 | ||
1510 | static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb, | |
1511 | struct rtllib_rx_stats *rx_stats) | |
1512 | { | |
1513 | return 0; | |
1514 | } | |
1515 | ||
1516 | /* All received frames are sent to this function. @skb contains the frame in | |
1517 | * IEEE 802.11 format, i.e., in the format it was sent over air. | |
1518 | * This function is called only as a tasklet (software IRQ). | |
1519 | */ | |
1520 | int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, | |
1521 | struct rtllib_rx_stats *rx_stats) | |
1522 | { | |
1523 | int ret = 0; | |
1524 | ||
1525 | if (!ieee || !skb || !rx_stats) { | |
1526 | pr_info("%s: Input parameters NULL!\n", __func__); | |
1527 | goto rx_dropped; | |
1528 | } | |
1529 | if (skb->len < 10) { | |
1530 | netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__); | |
1531 | goto rx_dropped; | |
1532 | } | |
1533 | ||
1534 | switch (ieee->iw_mode) { | |
1535 | case IW_MODE_ADHOC: | |
1536 | case IW_MODE_INFRA: | |
1537 | ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats); | |
1538 | break; | |
1539 | case IW_MODE_MASTER: | |
1540 | case IW_MODE_REPEAT: | |
1541 | ret = rtllib_rx_Master(ieee, skb, rx_stats); | |
1542 | break; | |
1543 | case IW_MODE_MONITOR: | |
1544 | ret = rtllib_rx_Monitor(ieee, skb, rx_stats); | |
1545 | break; | |
1546 | case IW_MODE_MESH: | |
1547 | ret = rtllib_rx_Mesh(ieee, skb, rx_stats); | |
1548 | break; | |
1549 | default: | |
1550 | netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__); | |
1551 | break; | |
1552 | } | |
1553 | ||
1554 | return ret; | |
1555 | ||
1556 | rx_dropped: | |
1557 | if (ieee) | |
1558 | ieee->stats.rx_dropped++; | |
1559 | return 0; | |
1560 | } | |
1561 | EXPORT_SYMBOL(rtllib_rx); | |
1562 | ||
1563 | static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; | |
1564 | ||
1565 | /* Make ther structure we read from the beacon packet has the right values */ | |
1566 | static int rtllib_verify_qos_info(struct rtllib_qos_information_element | |
1567 | *info_element, int sub_type) | |
1568 | { | |
1569 | ||
1570 | if (info_element->qui_subtype != sub_type) | |
1571 | return -1; | |
1572 | if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) | |
1573 | return -1; | |
1574 | if (info_element->qui_type != QOS_OUI_TYPE) | |
1575 | return -1; | |
1576 | if (info_element->version != QOS_VERSION_1) | |
1577 | return -1; | |
1578 | ||
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | ||
1583 | /* Parse a QoS parameter element */ | |
1584 | static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info | |
1585 | *element_param, | |
1586 | struct rtllib_info_element | |
1587 | *info_element) | |
1588 | { | |
1589 | int ret = 0; | |
1590 | u16 size = sizeof(struct rtllib_qos_parameter_info) - 2; | |
1591 | ||
1592 | if ((info_element == NULL) || (element_param == NULL)) | |
1593 | return -1; | |
1594 | ||
1595 | if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { | |
1596 | memcpy(element_param->info_element.qui, info_element->data, | |
1597 | info_element->len); | |
1598 | element_param->info_element.elementID = info_element->id; | |
1599 | element_param->info_element.length = info_element->len; | |
1600 | } else | |
1601 | ret = -1; | |
1602 | if (ret == 0) | |
1603 | ret = rtllib_verify_qos_info(&element_param->info_element, | |
1604 | QOS_OUI_PARAM_SUB_TYPE); | |
1605 | return ret; | |
1606 | } | |
1607 | ||
1608 | /* Parse a QoS information element */ | |
1609 | static int rtllib_read_qos_info_element(struct rtllib_qos_information_element | |
1610 | *element_info, | |
1611 | struct rtllib_info_element | |
1612 | *info_element) | |
1613 | { | |
1614 | int ret = 0; | |
1615 | u16 size = sizeof(struct rtllib_qos_information_element) - 2; | |
1616 | ||
1617 | if (element_info == NULL) | |
1618 | return -1; | |
1619 | if (info_element == NULL) | |
1620 | return -1; | |
1621 | ||
1622 | if ((info_element->id == QOS_ELEMENT_ID) && | |
1623 | (info_element->len == size)) { | |
1624 | memcpy(element_info->qui, info_element->data, | |
1625 | info_element->len); | |
1626 | element_info->elementID = info_element->id; | |
1627 | element_info->length = info_element->len; | |
1628 | } else | |
1629 | ret = -1; | |
1630 | ||
1631 | if (ret == 0) | |
1632 | ret = rtllib_verify_qos_info(element_info, | |
1633 | QOS_OUI_INFO_SUB_TYPE); | |
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | ||
1638 | /* Write QoS parameters from the ac parameters. */ | |
1639 | static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm, | |
1640 | struct rtllib_qos_data *qos_data) | |
1641 | { | |
1642 | struct rtllib_qos_ac_parameter *ac_params; | |
1643 | struct rtllib_qos_parameters *qos_param = &(qos_data->parameters); | |
1644 | int i; | |
1645 | u8 aci; | |
1646 | u8 acm; | |
1647 | ||
1648 | qos_data->wmm_acm = 0; | |
1649 | for (i = 0; i < QOS_QUEUE_NUM; i++) { | |
1650 | ac_params = &(param_elm->ac_params_record[i]); | |
1651 | ||
1652 | aci = (ac_params->aci_aifsn & 0x60) >> 5; | |
1653 | acm = (ac_params->aci_aifsn & 0x10) >> 4; | |
1654 | ||
1655 | if (aci >= QOS_QUEUE_NUM) | |
1656 | continue; | |
1657 | switch (aci) { | |
1658 | case 1: | |
1659 | /* BIT(0) | BIT(3) */ | |
1660 | if (acm) | |
1661 | qos_data->wmm_acm |= (0x01<<0)|(0x01<<3); | |
1662 | break; | |
1663 | case 2: | |
1664 | /* BIT(4) | BIT(5) */ | |
1665 | if (acm) | |
1666 | qos_data->wmm_acm |= (0x01<<4)|(0x01<<5); | |
1667 | break; | |
1668 | case 3: | |
1669 | /* BIT(6) | BIT(7) */ | |
1670 | if (acm) | |
1671 | qos_data->wmm_acm |= (0x01<<6)|(0x01<<7); | |
1672 | break; | |
1673 | case 0: | |
1674 | default: | |
1675 | /* BIT(1) | BIT(2) */ | |
1676 | if (acm) | |
1677 | qos_data->wmm_acm |= (0x01<<1)|(0x01<<2); | |
1678 | break; | |
1679 | } | |
1680 | ||
1681 | qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; | |
1682 | ||
1683 | /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ | |
1684 | qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2); | |
1685 | ||
1686 | qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & | |
1687 | 0x0F); | |
1688 | ||
1689 | qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & | |
1690 | 0xF0) >> 4); | |
1691 | ||
1692 | qos_param->flag[aci] = | |
1693 | (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; | |
1694 | qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; | |
1695 | } | |
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | /* we have a generic data element which it may contain QoS information or | |
1700 | * parameters element. check the information element length to decide | |
1701 | * which type to read | |
1702 | */ | |
1703 | static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee, | |
1704 | struct rtllib_info_element | |
1705 | *info_element, | |
1706 | struct rtllib_network *network) | |
1707 | { | |
1708 | int rc = 0; | |
1709 | struct rtllib_qos_information_element qos_info_element; | |
1710 | ||
1711 | rc = rtllib_read_qos_info_element(&qos_info_element, info_element); | |
1712 | ||
1713 | if (rc == 0) { | |
1714 | network->qos_data.param_count = qos_info_element.ac_info & 0x0F; | |
1715 | network->flags |= NETWORK_HAS_QOS_INFORMATION; | |
1716 | } else { | |
1717 | struct rtllib_qos_parameter_info param_element; | |
1718 | ||
1719 | rc = rtllib_read_qos_param_element(¶m_element, | |
1720 | info_element); | |
1721 | if (rc == 0) { | |
1722 | rtllib_qos_convert_ac_to_parameters(¶m_element, | |
1723 | &(network->qos_data)); | |
1724 | network->flags |= NETWORK_HAS_QOS_PARAMETERS; | |
1725 | network->qos_data.param_count = | |
1726 | param_element.info_element.ac_info & 0x0F; | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | if (rc == 0) { | |
1731 | netdev_dbg(ieee->dev, "QoS is supported\n"); | |
1732 | network->qos_data.supported = 1; | |
1733 | } | |
1734 | return rc; | |
1735 | } | |
1736 | ||
1737 | static const char *get_info_element_string(u16 id) | |
1738 | { | |
1739 | switch (id) { | |
1740 | case MFIE_TYPE_SSID: | |
1741 | return "SSID"; | |
1742 | case MFIE_TYPE_RATES: | |
1743 | return "RATES"; | |
1744 | case MFIE_TYPE_FH_SET: | |
1745 | return "FH_SET"; | |
1746 | case MFIE_TYPE_DS_SET: | |
1747 | return "DS_SET"; | |
1748 | case MFIE_TYPE_CF_SET: | |
1749 | return "CF_SET"; | |
1750 | case MFIE_TYPE_TIM: | |
1751 | return "TIM"; | |
1752 | case MFIE_TYPE_IBSS_SET: | |
1753 | return "IBSS_SET"; | |
1754 | case MFIE_TYPE_COUNTRY: | |
1755 | return "COUNTRY"; | |
1756 | case MFIE_TYPE_HOP_PARAMS: | |
1757 | return "HOP_PARAMS"; | |
1758 | case MFIE_TYPE_HOP_TABLE: | |
1759 | return "HOP_TABLE"; | |
1760 | case MFIE_TYPE_REQUEST: | |
1761 | return "REQUEST"; | |
1762 | case MFIE_TYPE_CHALLENGE: | |
1763 | return "CHALLENGE"; | |
1764 | case MFIE_TYPE_POWER_CONSTRAINT: | |
1765 | return "POWER_CONSTRAINT"; | |
1766 | case MFIE_TYPE_POWER_CAPABILITY: | |
1767 | return "POWER_CAPABILITY"; | |
1768 | case MFIE_TYPE_TPC_REQUEST: | |
1769 | return "TPC_REQUEST"; | |
1770 | case MFIE_TYPE_TPC_REPORT: | |
1771 | return "TPC_REPORT"; | |
1772 | case MFIE_TYPE_SUPP_CHANNELS: | |
1773 | return "SUPP_CHANNELS"; | |
1774 | case MFIE_TYPE_CSA: | |
1775 | return "CSA"; | |
1776 | case MFIE_TYPE_MEASURE_REQUEST: | |
1777 | return "MEASURE_REQUEST"; | |
1778 | case MFIE_TYPE_MEASURE_REPORT: | |
1779 | return "MEASURE_REPORT"; | |
1780 | case MFIE_TYPE_QUIET: | |
1781 | return "QUIET"; | |
1782 | case MFIE_TYPE_IBSS_DFS: | |
1783 | return "IBSS_DFS"; | |
1784 | case MFIE_TYPE_RSN: | |
1785 | return "RSN"; | |
1786 | case MFIE_TYPE_RATES_EX: | |
1787 | return "RATES_EX"; | |
1788 | case MFIE_TYPE_GENERIC: | |
1789 | return "GENERIC"; | |
1790 | case MFIE_TYPE_QOS_PARAMETER: | |
1791 | return "QOS_PARAMETER"; | |
1792 | default: | |
1793 | return "UNKNOWN"; | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | static inline void rtllib_extract_country_ie( | |
1798 | struct rtllib_device *ieee, | |
1799 | struct rtllib_info_element *info_element, | |
1800 | struct rtllib_network *network, | |
1801 | u8 *addr2) | |
1802 | { | |
1803 | if (IS_DOT11D_ENABLE(ieee)) { | |
1804 | if (info_element->len != 0) { | |
1805 | memcpy(network->CountryIeBuf, info_element->data, | |
1806 | info_element->len); | |
1807 | network->CountryIeLen = info_element->len; | |
1808 | ||
1809 | if (!IS_COUNTRY_IE_VALID(ieee)) { | |
1810 | if (rtllib_act_scanning(ieee, false) && | |
1811 | ieee->FirstIe_InScan) | |
1812 | netdev_info(ieee->dev, | |
1813 | "Received beacon ContryIE, SSID: <%s>\n", | |
1814 | network->ssid); | |
1815 | Dot11d_UpdateCountryIe(ieee, addr2, | |
1816 | info_element->len, | |
1817 | info_element->data); | |
1818 | } | |
1819 | } | |
1820 | ||
1821 | if (IS_EQUAL_CIE_SRC(ieee, addr2)) | |
1822 | UPDATE_CIE_WATCHDOG(ieee); | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | static void rtllib_parse_mife_generic(struct rtllib_device *ieee, | |
1827 | struct rtllib_info_element *info_element, | |
1828 | struct rtllib_network *network, | |
1829 | u16 *tmp_htcap_len, | |
1830 | u16 *tmp_htinfo_len) | |
1831 | { | |
1832 | u16 ht_realtek_agg_len = 0; | |
1833 | u8 ht_realtek_agg_buf[MAX_IE_LEN]; | |
1834 | ||
1835 | if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network)) | |
1836 | return; | |
1837 | if (info_element->len >= 4 && | |
1838 | info_element->data[0] == 0x00 && | |
1839 | info_element->data[1] == 0x50 && | |
1840 | info_element->data[2] == 0xf2 && | |
1841 | info_element->data[3] == 0x01) { | |
1842 | network->wpa_ie_len = min(info_element->len + 2, | |
1843 | MAX_WPA_IE_LEN); | |
1844 | memcpy(network->wpa_ie, info_element, network->wpa_ie_len); | |
1845 | return; | |
1846 | } | |
1847 | if (info_element->len == 7 && | |
1848 | info_element->data[0] == 0x00 && | |
1849 | info_element->data[1] == 0xe0 && | |
1850 | info_element->data[2] == 0x4c && | |
1851 | info_element->data[3] == 0x01 && | |
1852 | info_element->data[4] == 0x02) | |
1853 | network->Turbo_Enable = 1; | |
1854 | ||
1855 | if (*tmp_htcap_len == 0) { | |
1856 | if (info_element->len >= 4 && | |
1857 | info_element->data[0] == 0x00 && | |
1858 | info_element->data[1] == 0x90 && | |
1859 | info_element->data[2] == 0x4c && | |
1860 | info_element->data[3] == 0x033) { | |
1861 | *tmp_htcap_len = min_t(u8, info_element->len, | |
1862 | MAX_IE_LEN); | |
1863 | if (*tmp_htcap_len != 0) { | |
1864 | network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; | |
1865 | network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf)); | |
1866 | memcpy(network->bssht.bdHTCapBuf, | |
1867 | info_element->data, | |
1868 | network->bssht.bdHTCapLen); | |
1869 | } | |
1870 | } | |
1871 | if (*tmp_htcap_len != 0) { | |
1872 | network->bssht.bdSupportHT = true; | |
1873 | network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0); | |
1874 | } else { | |
1875 | network->bssht.bdSupportHT = false; | |
1876 | network->bssht.bdHT1R = false; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | ||
1881 | if (*tmp_htinfo_len == 0) { | |
1882 | if (info_element->len >= 4 && | |
1883 | info_element->data[0] == 0x00 && | |
1884 | info_element->data[1] == 0x90 && | |
1885 | info_element->data[2] == 0x4c && | |
1886 | info_element->data[3] == 0x034) { | |
1887 | *tmp_htinfo_len = min_t(u8, info_element->len, | |
1888 | MAX_IE_LEN); | |
1889 | if (*tmp_htinfo_len != 0) { | |
1890 | network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; | |
1891 | network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf)); | |
1892 | memcpy(network->bssht.bdHTInfoBuf, | |
1893 | info_element->data, | |
1894 | network->bssht.bdHTInfoLen); | |
1895 | } | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | if (network->bssht.bdSupportHT) { | |
1900 | if (info_element->len >= 4 && | |
1901 | info_element->data[0] == 0x00 && | |
1902 | info_element->data[1] == 0xe0 && | |
1903 | info_element->data[2] == 0x4c && | |
1904 | info_element->data[3] == 0x02) { | |
1905 | ht_realtek_agg_len = min_t(u8, info_element->len, | |
1906 | MAX_IE_LEN); | |
1907 | memcpy(ht_realtek_agg_buf, info_element->data, | |
1908 | info_element->len); | |
1909 | } | |
1910 | if (ht_realtek_agg_len >= 5) { | |
1911 | network->realtek_cap_exit = true; | |
1912 | network->bssht.bdRT2RTAggregation = true; | |
1913 | ||
1914 | if ((ht_realtek_agg_buf[4] == 1) && | |
1915 | (ht_realtek_agg_buf[5] & 0x02)) | |
1916 | network->bssht.bdRT2RTLongSlotTime = true; | |
1917 | ||
1918 | if ((ht_realtek_agg_buf[4] == 1) && | |
1919 | (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE)) | |
1920 | network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE; | |
1921 | } | |
1922 | } | |
1923 | if (ht_realtek_agg_len >= 5) { | |
1924 | if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP)) | |
1925 | network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP; | |
1926 | } | |
1927 | ||
1928 | if ((info_element->len >= 3 && | |
1929 | info_element->data[0] == 0x00 && | |
1930 | info_element->data[1] == 0x05 && | |
1931 | info_element->data[2] == 0xb5) || | |
1932 | (info_element->len >= 3 && | |
1933 | info_element->data[0] == 0x00 && | |
1934 | info_element->data[1] == 0x0a && | |
1935 | info_element->data[2] == 0xf7) || | |
1936 | (info_element->len >= 3 && | |
1937 | info_element->data[0] == 0x00 && | |
1938 | info_element->data[1] == 0x10 && | |
1939 | info_element->data[2] == 0x18)) { | |
1940 | network->broadcom_cap_exist = true; | |
1941 | } | |
1942 | if (info_element->len >= 3 && | |
1943 | info_element->data[0] == 0x00 && | |
1944 | info_element->data[1] == 0x0c && | |
1945 | info_element->data[2] == 0x43) | |
1946 | network->ralink_cap_exist = true; | |
1947 | if ((info_element->len >= 3 && | |
1948 | info_element->data[0] == 0x00 && | |
1949 | info_element->data[1] == 0x03 && | |
1950 | info_element->data[2] == 0x7f) || | |
1951 | (info_element->len >= 3 && | |
1952 | info_element->data[0] == 0x00 && | |
1953 | info_element->data[1] == 0x13 && | |
1954 | info_element->data[2] == 0x74)) | |
1955 | network->atheros_cap_exist = true; | |
1956 | ||
1957 | if ((info_element->len >= 3 && | |
1958 | info_element->data[0] == 0x00 && | |
1959 | info_element->data[1] == 0x50 && | |
1960 | info_element->data[2] == 0x43)) | |
1961 | network->marvell_cap_exist = true; | |
1962 | if (info_element->len >= 3 && | |
1963 | info_element->data[0] == 0x00 && | |
1964 | info_element->data[1] == 0x40 && | |
1965 | info_element->data[2] == 0x96) | |
1966 | network->cisco_cap_exist = true; | |
1967 | ||
1968 | ||
1969 | if (info_element->len >= 3 && | |
1970 | info_element->data[0] == 0x00 && | |
1971 | info_element->data[1] == 0x0a && | |
1972 | info_element->data[2] == 0xf5) | |
1973 | network->airgo_cap_exist = true; | |
1974 | ||
1975 | if (info_element->len > 4 && | |
1976 | info_element->data[0] == 0x00 && | |
1977 | info_element->data[1] == 0x40 && | |
1978 | info_element->data[2] == 0x96 && | |
1979 | info_element->data[3] == 0x01) { | |
1980 | if (info_element->len == 6) { | |
1981 | memcpy(network->CcxRmState, &info_element[4], 2); | |
1982 | if (network->CcxRmState[0] != 0) | |
1983 | network->bCcxRmEnable = true; | |
1984 | else | |
1985 | network->bCcxRmEnable = false; | |
1986 | network->MBssidMask = network->CcxRmState[1] & 0x07; | |
1987 | if (network->MBssidMask != 0) { | |
1988 | network->bMBssidValid = true; | |
1989 | network->MBssidMask = 0xff << | |
1990 | (network->MBssidMask); | |
1991 | ether_addr_copy(network->MBssid, | |
1992 | network->bssid); | |
1993 | network->MBssid[5] &= network->MBssidMask; | |
1994 | } else { | |
1995 | network->bMBssidValid = false; | |
1996 | } | |
1997 | } else { | |
1998 | network->bCcxRmEnable = false; | |
1999 | } | |
2000 | } | |
2001 | if (info_element->len > 4 && | |
2002 | info_element->data[0] == 0x00 && | |
2003 | info_element->data[1] == 0x40 && | |
2004 | info_element->data[2] == 0x96 && | |
2005 | info_element->data[3] == 0x03) { | |
2006 | if (info_element->len == 5) { | |
2007 | network->bWithCcxVerNum = true; | |
2008 | network->BssCcxVerNumber = info_element->data[4]; | |
2009 | } else { | |
2010 | network->bWithCcxVerNum = false; | |
2011 | network->BssCcxVerNumber = 0; | |
2012 | } | |
2013 | } | |
2014 | if (info_element->len > 4 && | |
2015 | info_element->data[0] == 0x00 && | |
2016 | info_element->data[1] == 0x50 && | |
2017 | info_element->data[2] == 0xf2 && | |
2018 | info_element->data[3] == 0x04) { | |
2019 | netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n", | |
2020 | info_element->len); | |
2021 | network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN); | |
2022 | memcpy(network->wzc_ie, info_element, network->wzc_ie_len); | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element, | |
2027 | struct rtllib_network *network, | |
2028 | u16 *tmp_htcap_len) | |
2029 | { | |
2030 | struct bss_ht *ht = &network->bssht; | |
2031 | ||
2032 | *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN); | |
2033 | if (*tmp_htcap_len != 0) { | |
2034 | ht->bdHTSpecVer = HT_SPEC_VER_EWC; | |
2035 | ht->bdHTCapLen = min_t(u16, *tmp_htcap_len, | |
2036 | sizeof(ht->bdHTCapBuf)); | |
2037 | memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen); | |
2038 | ||
2039 | ht->bdSupportHT = true; | |
2040 | ht->bdHT1R = ((((struct ht_capab_ele *) | |
2041 | ht->bdHTCapBuf))->MCS[1]) == 0; | |
2042 | ||
2043 | ht->bdBandWidth = (enum ht_channel_width) | |
2044 | (((struct ht_capab_ele *) | |
2045 | (ht->bdHTCapBuf))->ChlWidth); | |
2046 | } else { | |
2047 | ht->bdSupportHT = false; | |
2048 | ht->bdHT1R = false; | |
2049 | ht->bdBandWidth = HT_CHANNEL_WIDTH_20; | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | int rtllib_parse_info_param(struct rtllib_device *ieee, | |
2054 | struct rtllib_info_element *info_element, | |
2055 | u16 length, | |
2056 | struct rtllib_network *network, | |
2057 | struct rtllib_rx_stats *stats) | |
2058 | { | |
2059 | u8 i; | |
2060 | short offset; | |
2061 | u16 tmp_htcap_len = 0; | |
2062 | u16 tmp_htinfo_len = 0; | |
2063 | char rates_str[64]; | |
2064 | char *p; | |
2065 | ||
2066 | while (length >= sizeof(*info_element)) { | |
2067 | if (sizeof(*info_element) + info_element->len > length) { | |
2068 | netdev_dbg(ieee->dev, | |
2069 | "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n", | |
2070 | info_element->len + sizeof(*info_element), | |
2071 | length, info_element->id); | |
2072 | /* We stop processing but don't return an error here | |
2073 | * because some misbehaviour APs break this rule. ie. | |
2074 | * Orinoco AP1000. | |
2075 | */ | |
2076 | break; | |
2077 | } | |
2078 | ||
2079 | switch (info_element->id) { | |
2080 | case MFIE_TYPE_SSID: | |
2081 | if (rtllib_is_empty_essid(info_element->data, | |
2082 | info_element->len)) { | |
2083 | network->flags |= NETWORK_EMPTY_ESSID; | |
2084 | break; | |
2085 | } | |
2086 | ||
2087 | network->ssid_len = min(info_element->len, | |
2088 | (u8) IW_ESSID_MAX_SIZE); | |
2089 | memcpy(network->ssid, info_element->data, | |
2090 | network->ssid_len); | |
2091 | if (network->ssid_len < IW_ESSID_MAX_SIZE) | |
2092 | memset(network->ssid + network->ssid_len, 0, | |
2093 | IW_ESSID_MAX_SIZE - network->ssid_len); | |
2094 | ||
2095 | netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n", | |
2096 | network->ssid, network->ssid_len); | |
2097 | break; | |
2098 | ||
2099 | case MFIE_TYPE_RATES: | |
2100 | p = rates_str; | |
2101 | network->rates_len = min(info_element->len, | |
2102 | MAX_RATES_LENGTH); | |
2103 | for (i = 0; i < network->rates_len; i++) { | |
2104 | network->rates[i] = info_element->data[i]; | |
2105 | p += snprintf(p, sizeof(rates_str) - | |
2106 | (p - rates_str), "%02X ", | |
2107 | network->rates[i]); | |
2108 | if (rtllib_is_ofdm_rate | |
2109 | (info_element->data[i])) { | |
2110 | network->flags |= NETWORK_HAS_OFDM; | |
2111 | if (info_element->data[i] & | |
2112 | RTLLIB_BASIC_RATE_MASK) | |
2113 | network->flags &= | |
2114 | ~NETWORK_HAS_CCK; | |
2115 | } | |
2116 | ||
2117 | if (rtllib_is_cck_rate | |
2118 | (info_element->data[i])) { | |
2119 | network->flags |= NETWORK_HAS_CCK; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n", | |
2124 | rates_str, network->rates_len); | |
2125 | break; | |
2126 | ||
2127 | case MFIE_TYPE_RATES_EX: | |
2128 | p = rates_str; | |
2129 | network->rates_ex_len = min(info_element->len, | |
2130 | MAX_RATES_EX_LENGTH); | |
2131 | for (i = 0; i < network->rates_ex_len; i++) { | |
2132 | network->rates_ex[i] = info_element->data[i]; | |
2133 | p += snprintf(p, sizeof(rates_str) - | |
2134 | (p - rates_str), "%02X ", | |
2135 | network->rates_ex[i]); | |
2136 | if (rtllib_is_ofdm_rate | |
2137 | (info_element->data[i])) { | |
2138 | network->flags |= NETWORK_HAS_OFDM; | |
2139 | if (info_element->data[i] & | |
2140 | RTLLIB_BASIC_RATE_MASK) | |
2141 | network->flags &= | |
2142 | ~NETWORK_HAS_CCK; | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n", | |
2147 | rates_str, network->rates_ex_len); | |
2148 | break; | |
2149 | ||
2150 | case MFIE_TYPE_DS_SET: | |
2151 | netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n", | |
2152 | info_element->data[0]); | |
2153 | network->channel = info_element->data[0]; | |
2154 | break; | |
2155 | ||
2156 | case MFIE_TYPE_FH_SET: | |
2157 | netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n"); | |
2158 | break; | |
2159 | ||
2160 | case MFIE_TYPE_CF_SET: | |
2161 | netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n"); | |
2162 | break; | |
2163 | ||
2164 | case MFIE_TYPE_TIM: | |
2165 | if (info_element->len < 4) | |
2166 | break; | |
2167 | ||
2168 | network->tim.tim_count = info_element->data[0]; | |
2169 | network->tim.tim_period = info_element->data[1]; | |
2170 | ||
2171 | network->dtim_period = info_element->data[1]; | |
2172 | if (ieee->state != RTLLIB_LINKED) | |
2173 | break; | |
2174 | network->last_dtim_sta_time = jiffies; | |
2175 | ||
2176 | network->dtim_data = RTLLIB_DTIM_VALID; | |
2177 | ||
2178 | ||
2179 | if (info_element->data[2] & 1) | |
2180 | network->dtim_data |= RTLLIB_DTIM_MBCAST; | |
2181 | ||
2182 | offset = (info_element->data[2] >> 1)*2; | |
2183 | ||
2184 | ||
2185 | if (ieee->assoc_id < 8*offset || | |
2186 | ieee->assoc_id > 8*(offset + info_element->len - 3)) | |
2187 | break; | |
2188 | ||
2189 | offset = (ieee->assoc_id / 8) - offset; | |
2190 | if (info_element->data[3 + offset] & | |
2191 | (1 << (ieee->assoc_id % 8))) | |
2192 | network->dtim_data |= RTLLIB_DTIM_UCAST; | |
2193 | ||
2194 | network->listen_interval = network->dtim_period; | |
2195 | break; | |
2196 | ||
2197 | case MFIE_TYPE_ERP: | |
2198 | network->erp_value = info_element->data[0]; | |
2199 | network->flags |= NETWORK_HAS_ERP_VALUE; | |
2200 | netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n", | |
2201 | network->erp_value); | |
2202 | break; | |
2203 | case MFIE_TYPE_IBSS_SET: | |
2204 | network->atim_window = info_element->data[0]; | |
2205 | netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n", | |
2206 | network->atim_window); | |
2207 | break; | |
2208 | ||
2209 | case MFIE_TYPE_CHALLENGE: | |
2210 | netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n"); | |
2211 | break; | |
2212 | ||
2213 | case MFIE_TYPE_GENERIC: | |
2214 | netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n", | |
2215 | info_element->len); | |
2216 | ||
2217 | rtllib_parse_mife_generic(ieee, info_element, network, | |
2218 | &tmp_htcap_len, | |
2219 | &tmp_htinfo_len); | |
2220 | break; | |
2221 | ||
2222 | case MFIE_TYPE_RSN: | |
2223 | netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n", | |
2224 | info_element->len); | |
2225 | network->rsn_ie_len = min(info_element->len + 2, | |
2226 | MAX_WPA_IE_LEN); | |
2227 | memcpy(network->rsn_ie, info_element, | |
2228 | network->rsn_ie_len); | |
2229 | break; | |
2230 | ||
2231 | case MFIE_TYPE_HT_CAP: | |
2232 | netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n", | |
2233 | info_element->len); | |
2234 | ||
2235 | rtllib_parse_mfie_ht_cap(info_element, network, | |
2236 | &tmp_htcap_len); | |
2237 | break; | |
2238 | ||
2239 | ||
2240 | case MFIE_TYPE_HT_INFO: | |
2241 | netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n", | |
2242 | info_element->len); | |
2243 | tmp_htinfo_len = min_t(u8, info_element->len, | |
2244 | MAX_IE_LEN); | |
2245 | if (tmp_htinfo_len) { | |
2246 | network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; | |
2247 | network->bssht.bdHTInfoLen = tmp_htinfo_len > | |
2248 | sizeof(network->bssht.bdHTInfoBuf) ? | |
2249 | sizeof(network->bssht.bdHTInfoBuf) : | |
2250 | tmp_htinfo_len; | |
2251 | memcpy(network->bssht.bdHTInfoBuf, | |
2252 | info_element->data, | |
2253 | network->bssht.bdHTInfoLen); | |
2254 | } | |
2255 | break; | |
2256 | ||
2257 | case MFIE_TYPE_AIRONET: | |
2258 | netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n", | |
2259 | info_element->len); | |
2260 | if (info_element->len > IE_CISCO_FLAG_POSITION) { | |
2261 | network->bWithAironetIE = true; | |
2262 | ||
2263 | if ((info_element->data[IE_CISCO_FLAG_POSITION] | |
2264 | & SUPPORT_CKIP_MIC) || | |
2265 | (info_element->data[IE_CISCO_FLAG_POSITION] | |
2266 | & SUPPORT_CKIP_PK)) | |
2267 | network->bCkipSupported = true; | |
2268 | else | |
2269 | network->bCkipSupported = false; | |
2270 | } else { | |
2271 | network->bWithAironetIE = false; | |
2272 | network->bCkipSupported = false; | |
2273 | } | |
2274 | break; | |
2275 | case MFIE_TYPE_QOS_PARAMETER: | |
2276 | netdev_err(ieee->dev, | |
2277 | "QoS Error need to parse QOS_PARAMETER IE\n"); | |
2278 | break; | |
2279 | ||
2280 | case MFIE_TYPE_COUNTRY: | |
2281 | netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n", | |
2282 | info_element->len); | |
2283 | rtllib_extract_country_ie(ieee, info_element, network, | |
2284 | network->bssid); | |
2285 | break; | |
2286 | /* TODO */ | |
2287 | default: | |
2288 | netdev_dbg(ieee->dev, | |
2289 | "Unsupported info element: %s (%d)\n", | |
2290 | get_info_element_string(info_element->id), | |
2291 | info_element->id); | |
2292 | break; | |
2293 | } | |
2294 | ||
2295 | length -= sizeof(*info_element) + info_element->len; | |
2296 | info_element = | |
2297 | (struct rtllib_info_element *)&info_element-> | |
2298 | data[info_element->len]; | |
2299 | } | |
2300 | ||
2301 | if (!network->atheros_cap_exist && !network->broadcom_cap_exist && | |
2302 | !network->cisco_cap_exist && !network->ralink_cap_exist && | |
2303 | !network->bssht.bdRT2RTAggregation) | |
2304 | network->unknown_cap_exist = true; | |
2305 | else | |
2306 | network->unknown_cap_exist = false; | |
2307 | return 0; | |
2308 | } | |
2309 | ||
2310 | static long rtllib_translate_todbm(u8 signal_strength_index) | |
2311 | { | |
2312 | long signal_power; | |
2313 | ||
2314 | signal_power = (long)((signal_strength_index + 1) >> 1); | |
2315 | signal_power -= 95; | |
2316 | ||
2317 | return signal_power; | |
2318 | } | |
2319 | ||
2320 | static inline int rtllib_network_init( | |
2321 | struct rtllib_device *ieee, | |
2322 | struct rtllib_probe_response *beacon, | |
2323 | struct rtllib_network *network, | |
2324 | struct rtllib_rx_stats *stats) | |
2325 | { | |
2326 | memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data)); | |
2327 | ||
2328 | /* Pull out fixed field data */ | |
2329 | ether_addr_copy(network->bssid, beacon->header.addr3); | |
2330 | network->capability = le16_to_cpu(beacon->capability); | |
2331 | network->last_scanned = jiffies; | |
2332 | network->time_stamp[0] = beacon->time_stamp[0]; | |
2333 | network->time_stamp[1] = beacon->time_stamp[1]; | |
2334 | network->beacon_interval = le16_to_cpu(beacon->beacon_interval); | |
2335 | /* Where to pull this? beacon->listen_interval;*/ | |
2336 | network->listen_interval = 0x0A; | |
2337 | network->rates_len = network->rates_ex_len = 0; | |
2338 | network->ssid_len = 0; | |
2339 | network->hidden_ssid_len = 0; | |
2340 | memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid)); | |
2341 | network->flags = 0; | |
2342 | network->atim_window = 0; | |
2343 | network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? | |
2344 | 0x3 : 0x0; | |
2345 | network->berp_info_valid = false; | |
2346 | network->broadcom_cap_exist = false; | |
2347 | network->ralink_cap_exist = false; | |
2348 | network->atheros_cap_exist = false; | |
2349 | network->cisco_cap_exist = false; | |
2350 | network->unknown_cap_exist = false; | |
2351 | network->realtek_cap_exit = false; | |
2352 | network->marvell_cap_exist = false; | |
2353 | network->airgo_cap_exist = false; | |
2354 | network->Turbo_Enable = 0; | |
2355 | network->SignalStrength = stats->SignalStrength; | |
2356 | network->RSSI = stats->SignalStrength; | |
2357 | network->CountryIeLen = 0; | |
2358 | memset(network->CountryIeBuf, 0, MAX_IE_LEN); | |
2359 | HTInitializeBssDesc(&network->bssht); | |
2360 | if (stats->freq == RTLLIB_52GHZ_BAND) { | |
2361 | /* for A band (No DS info) */ | |
2362 | network->channel = stats->received_channel; | |
2363 | } else | |
2364 | network->flags |= NETWORK_HAS_CCK; | |
2365 | ||
2366 | network->wpa_ie_len = 0; | |
2367 | network->rsn_ie_len = 0; | |
2368 | network->wzc_ie_len = 0; | |
2369 | ||
2370 | if (rtllib_parse_info_param(ieee, | |
2371 | beacon->info_element, | |
2372 | (stats->len - sizeof(*beacon)), | |
2373 | network, | |
2374 | stats)) | |
2375 | return 1; | |
2376 | ||
2377 | network->mode = 0; | |
2378 | if (stats->freq == RTLLIB_52GHZ_BAND) | |
2379 | network->mode = IEEE_A; | |
2380 | else { | |
2381 | if (network->flags & NETWORK_HAS_OFDM) | |
2382 | network->mode |= IEEE_G; | |
2383 | if (network->flags & NETWORK_HAS_CCK) | |
2384 | network->mode |= IEEE_B; | |
2385 | } | |
2386 | ||
2387 | if (network->mode == 0) { | |
2388 | netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n", | |
2389 | escape_essid(network->ssid, network->ssid_len), | |
2390 | network->bssid); | |
2391 | return 1; | |
2392 | } | |
2393 | ||
2394 | if (network->bssht.bdSupportHT) { | |
2395 | if (network->mode == IEEE_A) | |
2396 | network->mode = IEEE_N_5G; | |
2397 | else if (network->mode & (IEEE_G | IEEE_B)) | |
2398 | network->mode = IEEE_N_24G; | |
2399 | } | |
2400 | if (rtllib_is_empty_essid(network->ssid, network->ssid_len)) | |
2401 | network->flags |= NETWORK_EMPTY_ESSID; | |
2402 | stats->signal = 30 + (stats->SignalStrength * 70) / 100; | |
2403 | stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25; | |
2404 | ||
2405 | memcpy(&network->stats, stats, sizeof(network->stats)); | |
2406 | ||
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | static inline int is_same_network(struct rtllib_network *src, | |
2411 | struct rtllib_network *dst, u8 ssidbroad) | |
2412 | { | |
2413 | /* A network is only a duplicate if the channel, BSSID, ESSID | |
2414 | * and the capability field (in particular IBSS and BSS) all match. | |
2415 | * We treat all <hidden> with the same BSSID and channel | |
2416 | * as one network | |
2417 | */ | |
2418 | return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) && | |
2419 | (src->channel == dst->channel) && | |
2420 | !memcmp(src->bssid, dst->bssid, ETH_ALEN) && | |
2421 | (!memcmp(src->ssid, dst->ssid, src->ssid_len) || | |
2422 | (!ssidbroad)) && | |
2423 | ((src->capability & WLAN_CAPABILITY_IBSS) == | |
2424 | (dst->capability & WLAN_CAPABILITY_IBSS)) && | |
2425 | ((src->capability & WLAN_CAPABILITY_ESS) == | |
2426 | (dst->capability & WLAN_CAPABILITY_ESS))); | |
2427 | } | |
2428 | ||
2429 | ||
2430 | static inline void update_network(struct rtllib_device *ieee, | |
2431 | struct rtllib_network *dst, | |
2432 | struct rtllib_network *src) | |
2433 | { | |
2434 | int qos_active; | |
2435 | u8 old_param; | |
2436 | ||
2437 | memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); | |
2438 | dst->capability = src->capability; | |
2439 | memcpy(dst->rates, src->rates, src->rates_len); | |
2440 | dst->rates_len = src->rates_len; | |
2441 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); | |
2442 | dst->rates_ex_len = src->rates_ex_len; | |
2443 | if (src->ssid_len > 0) { | |
2444 | if (dst->ssid_len == 0) { | |
2445 | memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid)); | |
2446 | dst->hidden_ssid_len = src->ssid_len; | |
2447 | memcpy(dst->hidden_ssid, src->ssid, src->ssid_len); | |
2448 | } else { | |
2449 | memset(dst->ssid, 0, dst->ssid_len); | |
2450 | dst->ssid_len = src->ssid_len; | |
2451 | memcpy(dst->ssid, src->ssid, src->ssid_len); | |
2452 | } | |
2453 | } | |
2454 | dst->mode = src->mode; | |
2455 | dst->flags = src->flags; | |
2456 | dst->time_stamp[0] = src->time_stamp[0]; | |
2457 | dst->time_stamp[1] = src->time_stamp[1]; | |
2458 | if (src->flags & NETWORK_HAS_ERP_VALUE) { | |
2459 | dst->erp_value = src->erp_value; | |
2460 | dst->berp_info_valid = src->berp_info_valid = true; | |
2461 | } | |
2462 | dst->beacon_interval = src->beacon_interval; | |
2463 | dst->listen_interval = src->listen_interval; | |
2464 | dst->atim_window = src->atim_window; | |
2465 | dst->dtim_period = src->dtim_period; | |
2466 | dst->dtim_data = src->dtim_data; | |
2467 | dst->last_dtim_sta_time = src->last_dtim_sta_time; | |
2468 | memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters)); | |
2469 | ||
2470 | dst->bssht.bdSupportHT = src->bssht.bdSupportHT; | |
2471 | dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; | |
2472 | dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen; | |
2473 | memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, | |
2474 | src->bssht.bdHTCapLen); | |
2475 | dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen; | |
2476 | memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, | |
2477 | src->bssht.bdHTInfoLen); | |
2478 | dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; | |
2479 | dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; | |
2480 | dst->broadcom_cap_exist = src->broadcom_cap_exist; | |
2481 | dst->ralink_cap_exist = src->ralink_cap_exist; | |
2482 | dst->atheros_cap_exist = src->atheros_cap_exist; | |
2483 | dst->realtek_cap_exit = src->realtek_cap_exit; | |
2484 | dst->marvell_cap_exist = src->marvell_cap_exist; | |
2485 | dst->cisco_cap_exist = src->cisco_cap_exist; | |
2486 | dst->airgo_cap_exist = src->airgo_cap_exist; | |
2487 | dst->unknown_cap_exist = src->unknown_cap_exist; | |
2488 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); | |
2489 | dst->wpa_ie_len = src->wpa_ie_len; | |
2490 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); | |
2491 | dst->rsn_ie_len = src->rsn_ie_len; | |
2492 | memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len); | |
2493 | dst->wzc_ie_len = src->wzc_ie_len; | |
2494 | ||
2495 | dst->last_scanned = jiffies; | |
2496 | /* qos related parameters */ | |
2497 | qos_active = dst->qos_data.active; | |
2498 | old_param = dst->qos_data.param_count; | |
2499 | dst->qos_data.supported = src->qos_data.supported; | |
2500 | if (dst->flags & NETWORK_HAS_QOS_PARAMETERS) | |
2501 | memcpy(&dst->qos_data, &src->qos_data, | |
2502 | sizeof(struct rtllib_qos_data)); | |
2503 | if (dst->qos_data.supported == 1) { | |
2504 | if (dst->ssid_len) | |
2505 | netdev_dbg(ieee->dev, | |
2506 | "QoS the network %s is QoS supported\n", | |
2507 | dst->ssid); | |
2508 | else | |
2509 | netdev_dbg(ieee->dev, | |
2510 | "QoS the network is QoS supported\n"); | |
2511 | } | |
2512 | dst->qos_data.active = qos_active; | |
2513 | dst->qos_data.old_param_count = old_param; | |
2514 | ||
2515 | dst->wmm_info = src->wmm_info; | |
2516 | if (src->wmm_param[0].ac_aci_acm_aifsn || | |
2517 | src->wmm_param[1].ac_aci_acm_aifsn || | |
2518 | src->wmm_param[2].ac_aci_acm_aifsn || | |
2519 | src->wmm_param[3].ac_aci_acm_aifsn) | |
2520 | memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); | |
2521 | ||
2522 | dst->SignalStrength = src->SignalStrength; | |
2523 | dst->RSSI = src->RSSI; | |
2524 | dst->Turbo_Enable = src->Turbo_Enable; | |
2525 | ||
2526 | dst->CountryIeLen = src->CountryIeLen; | |
2527 | memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); | |
2528 | ||
2529 | dst->bWithAironetIE = src->bWithAironetIE; | |
2530 | dst->bCkipSupported = src->bCkipSupported; | |
2531 | memcpy(dst->CcxRmState, src->CcxRmState, 2); | |
2532 | dst->bCcxRmEnable = src->bCcxRmEnable; | |
2533 | dst->MBssidMask = src->MBssidMask; | |
2534 | dst->bMBssidValid = src->bMBssidValid; | |
2535 | memcpy(dst->MBssid, src->MBssid, 6); | |
2536 | dst->bWithCcxVerNum = src->bWithCcxVerNum; | |
2537 | dst->BssCcxVerNumber = src->BssCcxVerNumber; | |
2538 | } | |
2539 | ||
2540 | static inline int is_beacon(u16 fc) | |
2541 | { | |
2542 | return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON); | |
2543 | } | |
2544 | ||
2545 | static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel) | |
2546 | { | |
2547 | if (channel > MAX_CHANNEL_NUMBER) { | |
2548 | netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); | |
2549 | return 0; | |
2550 | } | |
2551 | ||
2552 | if (rtllib->active_channel_map[channel] == 2) | |
2553 | return 1; | |
2554 | ||
2555 | return 0; | |
2556 | } | |
2557 | ||
2558 | int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel) | |
2559 | { | |
2560 | if (channel > MAX_CHANNEL_NUMBER) { | |
2561 | netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); | |
2562 | return 0; | |
2563 | } | |
2564 | if (rtllib->active_channel_map[channel] > 0) | |
2565 | return 1; | |
2566 | ||
2567 | return 0; | |
2568 | } | |
2569 | EXPORT_SYMBOL(rtllib_legal_channel); | |
2570 | ||
2571 | static inline void rtllib_process_probe_response( | |
2572 | struct rtllib_device *ieee, | |
2573 | struct rtllib_probe_response *beacon, | |
2574 | struct rtllib_rx_stats *stats) | |
2575 | { | |
2576 | struct rtllib_network *target; | |
2577 | struct rtllib_network *oldest = NULL; | |
2578 | struct rtllib_info_element *info_element = &beacon->info_element[0]; | |
2579 | unsigned long flags; | |
2580 | short renew; | |
2581 | struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), | |
2582 | GFP_ATOMIC); | |
2583 | u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl); | |
2584 | ||
2585 | if (!network) | |
2586 | return; | |
2587 | ||
2588 | netdev_dbg(ieee->dev, | |
2589 | "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", | |
2590 | escape_essid(info_element->data, info_element->len), | |
2591 | beacon->header.addr3, | |
2592 | (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0', | |
2593 | (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0', | |
2594 | (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0', | |
2595 | (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0', | |
2596 | (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0', | |
2597 | (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0', | |
2598 | (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0', | |
2599 | (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0', | |
2600 | (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0', | |
2601 | (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0', | |
2602 | (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0', | |
2603 | (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0', | |
2604 | (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0', | |
2605 | (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0', | |
2606 | (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0', | |
2607 | (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0'); | |
2608 | ||
2609 | if (rtllib_network_init(ieee, beacon, network, stats)) { | |
2610 | netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n", | |
2611 | escape_essid(info_element->data, info_element->len), | |
2612 | beacon->header.addr3, | |
2613 | is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); | |
2614 | goto free_network; | |
2615 | } | |
2616 | ||
2617 | ||
2618 | if (!rtllib_legal_channel(ieee, network->channel)) | |
2619 | goto free_network; | |
2620 | ||
2621 | if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) { | |
2622 | if (IsPassiveChannel(ieee, network->channel)) { | |
2623 | netdev_info(ieee->dev, | |
2624 | "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", | |
2625 | network->channel); | |
2626 | goto free_network; | |
2627 | } | |
2628 | } | |
2629 | ||
2630 | /* The network parsed correctly -- so now we scan our known networks | |
2631 | * to see if we can find it in our list. | |
2632 | * | |
2633 | * NOTE: This search is definitely not optimized. Once its doing | |
2634 | * the "right thing" we'll optimize it for efficiency if | |
2635 | * necessary | |
2636 | */ | |
2637 | ||
2638 | /* Search for this entry in the list and update it if it is | |
2639 | * already there. | |
2640 | */ | |
2641 | ||
2642 | spin_lock_irqsave(&ieee->lock, flags); | |
2643 | if (is_same_network(&ieee->current_network, network, | |
2644 | (network->ssid_len ? 1 : 0))) { | |
2645 | update_network(ieee, &ieee->current_network, network); | |
2646 | if ((ieee->current_network.mode == IEEE_N_24G || | |
2647 | ieee->current_network.mode == IEEE_G) | |
2648 | && ieee->current_network.berp_info_valid) { | |
2649 | if (ieee->current_network.erp_value & ERP_UseProtection) | |
2650 | ieee->current_network.buseprotection = true; | |
2651 | else | |
2652 | ieee->current_network.buseprotection = false; | |
2653 | } | |
2654 | if (is_beacon(frame_ctl)) { | |
2655 | if (ieee->state >= RTLLIB_LINKED) | |
2656 | ieee->LinkDetectInfo.NumRecvBcnInPeriod++; | |
2657 | } | |
2658 | } | |
2659 | list_for_each_entry(target, &ieee->network_list, list) { | |
2660 | if (is_same_network(target, network, | |
2661 | (target->ssid_len ? 1 : 0))) | |
2662 | break; | |
2663 | if ((oldest == NULL) || | |
2664 | (target->last_scanned < oldest->last_scanned)) | |
2665 | oldest = target; | |
2666 | } | |
2667 | ||
2668 | /* If we didn't find a match, then get a new network slot to initialize | |
2669 | * with this beacon's information | |
2670 | */ | |
2671 | if (&target->list == &ieee->network_list) { | |
2672 | if (list_empty(&ieee->network_free_list)) { | |
2673 | /* If there are no more slots, expire the oldest */ | |
2674 | list_del(&oldest->list); | |
2675 | target = oldest; | |
2676 | netdev_dbg(ieee->dev, | |
2677 | "Expired '%s' ( %pM) from network list.\n", | |
2678 | escape_essid(target->ssid, target->ssid_len), | |
2679 | target->bssid); | |
2680 | } else { | |
2681 | /* Otherwise just pull from the free list */ | |
2682 | target = list_entry(ieee->network_free_list.next, | |
2683 | struct rtllib_network, list); | |
2684 | list_del(ieee->network_free_list.next); | |
2685 | } | |
2686 | ||
2687 | netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n", | |
2688 | escape_essid(network->ssid, network->ssid_len), | |
2689 | network->bssid, | |
2690 | is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); | |
2691 | ||
2692 | memcpy(target, network, sizeof(*target)); | |
2693 | list_add_tail(&target->list, &ieee->network_list); | |
2694 | if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) | |
2695 | rtllib_softmac_new_net(ieee, network); | |
2696 | } else { | |
2697 | netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n", | |
2698 | escape_essid(target->ssid, target->ssid_len), | |
2699 | target->bssid, | |
2700 | is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); | |
2701 | ||
2702 | /* we have an entry and we are going to update it. But this | |
2703 | * entry may be already expired. In this case we do the same | |
2704 | * as we found a new net and call the new_net handler | |
2705 | */ | |
2706 | renew = !time_after(target->last_scanned + ieee->scan_age, | |
2707 | jiffies); | |
2708 | if ((!target->ssid_len) && | |
2709 | (((network->ssid_len > 0) && (target->hidden_ssid_len == 0)) | |
2710 | || ((ieee->current_network.ssid_len == network->ssid_len) && | |
2711 | (strncmp(ieee->current_network.ssid, network->ssid, | |
2712 | network->ssid_len) == 0) && | |
2713 | (ieee->state == RTLLIB_NOLINK)))) | |
2714 | renew = 1; | |
2715 | update_network(ieee, target, network); | |
2716 | if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) | |
2717 | rtllib_softmac_new_net(ieee, network); | |
2718 | } | |
2719 | ||
2720 | spin_unlock_irqrestore(&ieee->lock, flags); | |
2721 | if (is_beacon(frame_ctl) && | |
2722 | is_same_network(&ieee->current_network, network, | |
2723 | (network->ssid_len ? 1 : 0)) && | |
2724 | (ieee->state == RTLLIB_LINKED)) { | |
2725 | if (ieee->handle_beacon != NULL) | |
2726 | ieee->handle_beacon(ieee->dev, beacon, | |
2727 | &ieee->current_network); | |
2728 | } | |
2729 | free_network: | |
2730 | kfree(network); | |
2731 | } | |
2732 | ||
2733 | static void rtllib_rx_mgt(struct rtllib_device *ieee, | |
2734 | struct sk_buff *skb, | |
2735 | struct rtllib_rx_stats *stats) | |
2736 | { | |
2737 | struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data; | |
2738 | ||
2739 | if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) != | |
2740 | RTLLIB_STYPE_PROBE_RESP) && | |
2741 | (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) != | |
2742 | RTLLIB_STYPE_BEACON)) | |
2743 | ieee->last_rx_ps_time = jiffies; | |
2744 | ||
2745 | switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { | |
2746 | ||
2747 | case RTLLIB_STYPE_BEACON: | |
2748 | netdev_dbg(ieee->dev, "received BEACON (%d)\n", | |
2749 | WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); | |
2750 | rtllib_process_probe_response( | |
2751 | ieee, (struct rtllib_probe_response *)header, | |
2752 | stats); | |
2753 | ||
2754 | if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED && | |
2755 | ieee->iw_mode == IW_MODE_INFRA && | |
2756 | ieee->state == RTLLIB_LINKED)) | |
2757 | tasklet_schedule(&ieee->ps_task); | |
2758 | ||
2759 | break; | |
2760 | ||
2761 | case RTLLIB_STYPE_PROBE_RESP: | |
2762 | netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n", | |
2763 | WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); | |
2764 | rtllib_process_probe_response(ieee, | |
2765 | (struct rtllib_probe_response *)header, stats); | |
2766 | break; | |
2767 | case RTLLIB_STYPE_PROBE_REQ: | |
2768 | netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n", | |
2769 | WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); | |
2770 | if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) && | |
2771 | ((ieee->iw_mode == IW_MODE_ADHOC || | |
2772 | ieee->iw_mode == IW_MODE_MASTER) && | |
2773 | ieee->state == RTLLIB_LINKED)) | |
2774 | rtllib_rx_probe_rq(ieee, skb); | |
2775 | break; | |
2776 | } | |
2777 | } |