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Merge tag 'nfs-for-3.16-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[deliverable/linux.git] / drivers / staging / rtl8192e / rtllib_rx.c
CommitLineData
94a79942
LF		 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
559a4c31 17 Andrea Merello <andrea.merello@gmail.com>
94a79942
LF		 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>
94a79942
LF		 39#include <linux/wireless.h>
40#include <linux/etherdevice.h>
db8971b6 41#include <linux/uaccess.h>
94a79942
LF		 42#include <linux/ctype.h>
43
44#include "rtllib.h"
94a79942 45#include "dot11d.h"
94a79942 46
94a79942 47static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
db8971b6 48 struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
94a79942
LF		 49 size_t hdr_length)
50{
94a79942 51 skb->dev = ieee->dev;
db8971b6 52 skb_reset_mac_header(skb);
94a79942
LF		 53 skb_pull(skb, hdr_length);
54 skb->pkt_type = PACKET_OTHERHOST;
55 skb->protocol = __constant_htons(ETH_P_80211_RAW);
56 memset(skb->cb, 0, sizeof(skb->cb));
57 netif_rx(skb);
94a79942
LF		 58}
59
60/* Called only as a tasklet (software IRQ) */
61static struct rtllib_frag_entry *
62rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
db8971b6 63 unsigned int frag, u8 tid, u8 *src, u8 *dst)
94a79942
LF		 64{
65 struct rtllib_frag_entry *entry;
66 int i;
67
68 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
69 entry = &ieee->frag_cache[tid][i];
70 if (entry->skb != NULL &&
71 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
72 RTLLIB_DEBUG_FRAG(
73 "expiring fragment cache entry "
74 "seq=%u last_frag=%u\n",
75 entry->seq, entry->last_frag);
76 dev_kfree_skb_any(entry->skb);
77 entry->skb = NULL;
78 }
79
80 if (entry->skb != NULL && entry->seq == seq &&
81 (entry->last_frag + 1 == frag || frag == -1) &&
82 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
83 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
84 return entry;
85 }
86
87 return NULL;
88}
89
90/* Called only as a tasklet (software IRQ) */
91static struct sk_buff *
92rtllib_frag_cache_get(struct rtllib_device *ieee,
93 struct rtllib_hdr_4addr *hdr)
94{
95 struct sk_buff *skb = NULL;
96 u16 fc = le16_to_cpu(hdr->frame_ctl);
97 u16 sc = le16_to_cpu(hdr->seq_ctl);
98 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
99 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
100 struct rtllib_frag_entry *entry;
101 struct rtllib_hdr_3addrqos *hdr_3addrqos;
102 struct rtllib_hdr_4addrqos *hdr_4addrqos;
103 u8 tid;
104
db8971b6
LF		 105 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
106 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
107 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
108 tid = UP2AC(tid);
109 tid++;
94a79942 110 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
db8971b6
LF		 111 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
112 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
113 tid = UP2AC(tid);
114 tid++;
94a79942 115 } else {
db8971b6 116 tid = 0;
94a79942
LF		 117 }
118
119 if (frag == 0) {
120 /* Reserve enough space to fit maximum frame length */
121 skb = dev_alloc_skb(ieee->dev->mtu +
122 sizeof(struct rtllib_hdr_4addr) +
123 8 /* LLC */ +
124 2 /* alignment */ +
125 8 /* WEP */ +
126 ETH_ALEN /* WDS */ +
db8971b6 127 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
94a79942
LF		 128 if (skb == NULL)
129 return NULL;
130
131 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
132 ieee->frag_next_idx[tid]++;
133 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
134 ieee->frag_next_idx[tid] = 0;
135
136 if (entry->skb != NULL)
137 dev_kfree_skb_any(entry->skb);
138
139 entry->first_frag_time = jiffies;
140 entry->seq = seq;
141 entry->last_frag = frag;
142 entry->skb = skb;
143 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
144 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
145 } else {
146 /* received a fragment of a frame for which the head fragment
147 * should have already been received */
db8971b6 148 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
94a79942
LF		 149 hdr->addr1);
150 if (entry != NULL) {
151 entry->last_frag = frag;
152 skb = entry->skb;
153 }
154 }
155
156 return skb;
157}
158
159
160/* Called only as a tasklet (software IRQ) */
161static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
162 struct rtllib_hdr_4addr *hdr)
163{
164 u16 fc = le16_to_cpu(hdr->frame_ctl);
165 u16 sc = le16_to_cpu(hdr->seq_ctl);
166 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
167 struct rtllib_frag_entry *entry;
168 struct rtllib_hdr_3addrqos *hdr_3addrqos;
169 struct rtllib_hdr_4addrqos *hdr_4addrqos;
170 u8 tid;
171
db8971b6
LF		 172 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
173 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
174 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
175 tid = UP2AC(tid);
176 tid++;
94a79942 177 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
db8971b6
LF		 178 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
179 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
180 tid = UP2AC(tid);
181 tid++;
94a79942 182 } else {
db8971b6 183 tid = 0;
94a79942
LF		 184 }
185
db8971b6 186 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
94a79942
LF		 187 hdr->addr1);
188
189 if (entry == NULL) {
190 RTLLIB_DEBUG_FRAG(
191 "could not invalidate fragment cache "
192 "entry (seq=%u)\n", seq);
193 return -1;
194 }
195
196 entry->skb = NULL;
197 return 0;
198}
199
94a79942
LF		 200/* rtllib_rx_frame_mgtmt
201 *
202 * Responsible for handling management control frames
203 *
204 * Called by rtllib_rx */
205static inline int
206rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
207 struct rtllib_rx_stats *rx_stats, u16 type,
208 u16 stype)
209{
210 /* On the struct stats definition there is written that
211 * this is not mandatory.... but seems that the probe
212 * response parser uses it
213 */
a0711c4d 214 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
94a79942
LF		 215
216 rx_stats->len = skb->len;
db8971b6 217 rtllib_rx_mgt(ieee, skb, rx_stats);
94a79942
LF		 218 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
219 dev_kfree_skb_any(skb);
220 return 0;
221 }
222 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
223
224 dev_kfree_skb_any(skb);
225
226 return 0;
94a79942
LF		 227}
228
94a79942
LF		 229/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
230/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
db8971b6
LF		 231static unsigned char rfc1042_header[] = {
232 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
233};
94a79942 234/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
db8971b6
LF		 235static unsigned char bridge_tunnel_header[] = {
236 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
237};
94a79942 238/* No encapsulation header if EtherType < 0x600 (=length) */
94a79942
LF		 239
240/* Called by rtllib_rx_frame_decrypt */
241static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
242 struct sk_buff *skb, size_t hdrlen)
243{
244 struct net_device *dev = ieee->dev;
245 u16 fc, ethertype;
246 struct rtllib_hdr_4addr *hdr;
247 u8 *pos;
248
249 if (skb->len < 24)
250 return 0;
251
252 hdr = (struct rtllib_hdr_4addr *) skb->data;
253 fc = le16_to_cpu(hdr->frame_ctl);
254
255 /* check that the frame is unicast frame to us */
256 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
257 RTLLIB_FCTL_TODS &&
258 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
259 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
260 /* ToDS frame with own addr BSSID and DA */
261 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
262 RTLLIB_FCTL_FROMDS &&
263 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
264 /* FromDS frame with own addr as DA */
265 } else
266 return 0;
267
268 if (skb->len < 24 + 8)
269 return 0;
270
271 /* check for port access entity Ethernet type */
272 pos = skb->data + hdrlen;
273 ethertype = (pos[6] << 8) | pos[7];
274 if (ethertype == ETH_P_PAE)
275 return 1;
276
277 return 0;
278}
279
280/* Called only as a tasklet (software IRQ), by rtllib_rx */
281static inline int
db8971b6 282rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
32c44cb5 283 struct lib80211_crypt_data *crypt)
94a79942
LF		 284{
285 struct rtllib_hdr_4addr *hdr;
286 int res, hdrlen;
287
288 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
289 return 0;
4f6807e8 290
db8971b6
LF		 291 if (ieee->hwsec_active) {
292 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
94a79942
LF		 293 tcb_desc->bHwSec = 1;
294
295 if (ieee->need_sw_enc)
296 tcb_desc->bHwSec = 0;
297 }
4f6807e8 298
94a79942
LF		 299 hdr = (struct rtllib_hdr_4addr *) skb->data;
300 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
301
94a79942
LF		 302 atomic_inc(&crypt->refcnt);
303 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
304 atomic_dec(&crypt->refcnt);
305 if (res < 0) {
306 RTLLIB_DEBUG_DROP(
ac50ddaa
LF		 307 "decryption failed (SA= %pM"
308 ") res=%d\n", hdr->addr2, res);
94a79942
LF		 309 if (res == -2)
310 RTLLIB_DEBUG_DROP("Decryption failed ICV "
311 "mismatch (key %d)\n",
312 skb->data[hdrlen + 3] >> 6);
313 ieee->ieee_stats.rx_discards_undecryptable++;
314 return -1;
315 }
316
317 return res;
318}
319
320
321/* Called only as a tasklet (software IRQ), by rtllib_rx */
322static inline int
db8971b6 323rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
32c44cb5 324 int keyidx, struct lib80211_crypt_data *crypt)
94a79942
LF		 325{
326 struct rtllib_hdr_4addr *hdr;
327 int res, hdrlen;
328
329 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
330 return 0;
db8971b6
LF		 331 if (ieee->hwsec_active) {
332 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
94a79942
LF		 333 tcb_desc->bHwSec = 1;
334
335 if (ieee->need_sw_enc)
336 tcb_desc->bHwSec = 0;
337 }
338
339 hdr = (struct rtllib_hdr_4addr *) skb->data;
340 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
341
342 atomic_inc(&crypt->refcnt);
32c44cb5 343 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
94a79942
LF		 344 atomic_dec(&crypt->refcnt);
345 if (res < 0) {
346 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
ac50ddaa
LF		 347 " (SA= %pM keyidx=%d)\n",
348 ieee->dev->name, hdr->addr2, keyidx);
94a79942
LF		 349 return -1;
350 }
351
352 return 0;
353}
354
355
356/* this function is stolen from ipw2200 driver*/
357#define IEEE_PACKET_RETRY_TIME (5*HZ)
358static int is_duplicate_packet(struct rtllib_device *ieee,
359 struct rtllib_hdr_4addr *header)
360{
361 u16 fc = le16_to_cpu(header->frame_ctl);
362 u16 sc = le16_to_cpu(header->seq_ctl);
363 u16 seq = WLAN_GET_SEQ_SEQ(sc);
364 u16 frag = WLAN_GET_SEQ_FRAG(sc);
365 u16 *last_seq, *last_frag;
366 unsigned long *last_time;
367 struct rtllib_hdr_3addrqos *hdr_3addrqos;
368 struct rtllib_hdr_4addrqos *hdr_4addrqos;
369 u8 tid;
370
db8971b6
LF		 371 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
372 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
373 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
374 tid = UP2AC(tid);
375 tid++;
94a79942 376 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
db8971b6
LF		 377 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
378 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
379 tid = UP2AC(tid);
380 tid++;
94a79942 381 } else {
db8971b6 382 tid = 0;
94a79942
LF		 383 }
384
385 switch (ieee->iw_mode) {
386 case IW_MODE_ADHOC:
387 {
388 struct list_head *p;
389 struct ieee_ibss_seq *entry = NULL;
390 u8 *mac = header->addr2;
391 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
392 list_for_each(p, &ieee->ibss_mac_hash[index]) {
393 entry = list_entry(p, struct ieee_ibss_seq, list);
394 if (!memcmp(entry->mac, mac, ETH_ALEN))
395 break;
396 }
397 if (p == &ieee->ibss_mac_hash[index]) {
398 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
399 if (!entry) {
400 printk(KERN_WARNING "Cannot malloc new mac entry\n");
401 return 0;
402 }
403 memcpy(entry->mac, mac, ETH_ALEN);
404 entry->seq_num[tid] = seq;
405 entry->frag_num[tid] = frag;
406 entry->packet_time[tid] = jiffies;
407 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
408 return 0;
409 }
410 last_seq = &entry->seq_num[tid];
411 last_frag = &entry->frag_num[tid];
412 last_time = &entry->packet_time[tid];
413 break;
414 }
415
416 case IW_MODE_INFRA:
417 last_seq = &ieee->last_rxseq_num[tid];
418 last_frag = &ieee->last_rxfrag_num[tid];
419 last_time = &ieee->last_packet_time[tid];
420 break;
421 default:
422 return 0;
423 }
424
425 if ((*last_seq == seq) &&
426 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
db8971b6 427 if (*last_frag == frag)
94a79942 428 goto drop;
94a79942
LF		 429 if (*last_frag + 1 != frag)
430 /* out-of-order fragment */
431 goto drop;
432 } else
433 *last_seq = seq;
434
435 *last_frag = frag;
436 *last_time = jiffies;
437 return 0;
438
439drop:
440
441 return 1;
442}
db8971b6 443
49aab5fd
LF		 444static bool AddReorderEntry(struct rx_ts_record *pTS,
445 struct rx_reorder_entry *pReorderEntry)
94a79942
LF		 446{
447 struct list_head *pList = &pTS->RxPendingPktList;
448
db8971b6 449 while (pList->next != &pTS->RxPendingPktList) {
49aab5fd
LF		 450 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
451 list_entry(pList->next, struct rx_reorder_entry,
452 List))->SeqNum))
94a79942 453 pList = pList->next;
49aab5fd
LF		 454 else if (SN_EQUAL(pReorderEntry->SeqNum,
455 ((struct rx_reorder_entry *)list_entry(pList->next,
456 struct rx_reorder_entry, List))->SeqNum))
457 return false;
94a79942 458 else
94a79942 459 break;
94a79942
LF		 460 }
461 pReorderEntry->List.next = pList->next;
462 pReorderEntry->List.next->prev = &pReorderEntry->List;
463 pReorderEntry->List.prev = pList;
464 pList->next = &pReorderEntry->List;
465
466 return true;
467}
468
db8971b6 469void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
94a79942
LF		 470{
471 struct net_device_stats *stats = &ieee->stats;
db8971b6 472 u8 i = 0 , j = 0;
94a79942
LF		 473 u16 ethertype;
474 for (j = 0; j < index; j++) {
db8971b6
LF		 475 struct rtllib_rxb *prxb = prxbIndicateArray[j];
476 for (i = 0; i < prxb->nr_subframes; i++) {
94a79942
LF		 477 struct sk_buff *sub_skb = prxb->subframes[i];
478
479 /* convert hdr + possible LLC headers into Ethernet header */
480 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
481 if (sub_skb->len >= 8 &&
db8971b6
LF		 482 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
483 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
484 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
485 /* remove RFC1042 or Bridge-Tunnel encapsulation
486 * and replace EtherType */
94a79942
LF		 487 skb_pull(sub_skb, SNAP_SIZE);
488 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
489 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
490 } else {
491 u16 len;
492 /* Leave Ethernet header part of hdr and full payload */
1f5a0d0c 493 len = sub_skb->len;
94a79942
LF		 494 memcpy(skb_push(sub_skb, 2), &len, 2);
495 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
496 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
497 }
498
cd017123 499 /* Indicate the packets to upper layer */
94a79942
LF		 500 if (sub_skb) {
501 stats->rx_packets++;
502 stats->rx_bytes += sub_skb->len;
503
504 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
505 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
506 sub_skb->dev = ieee->dev;
507 sub_skb->dev->stats.rx_packets++;
508 sub_skb->dev->stats.rx_bytes += sub_skb->len;
94a79942 509 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
94a79942
LF		 510 ieee->last_rx_ps_time = jiffies;
511 netif_rx(sub_skb);
512 }
513 }
514 kfree(prxb);
515 prxb = NULL;
516 }
517}
518
db8971b6 519void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
94a79942 520{
8cba1432 521 struct rx_reorder_entry *pRxReorderEntry;
db8971b6 522 u8 RfdCnt = 0;
94a79942
LF		 523
524 del_timer_sync(&pTS->RxPktPendingTimer);
db8971b6
LF		 525 while (!list_empty(&pTS->RxPendingPktList)) {
526 if (RfdCnt >= REORDER_WIN_SIZE) {
527 printk(KERN_INFO "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
94a79942
LF		 528 break;
529 }
530
db8971b6
LF		 531 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
532 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
94a79942
LF		 533 list_del_init(&pRxReorderEntry->List);
534
2eed3dee 535 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
94a79942
LF		 536
537 RfdCnt = RfdCnt + 1;
538 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
539 }
2eed3dee 540 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
94a79942
LF		 541
542 pTS->RxIndicateSeq = 0xffff;
94a79942
LF		 543}
544
49aab5fd
LF		 545static void RxReorderIndicatePacket(struct rtllib_device *ieee,
546 struct rtllib_rxb *prxb,
547 struct rx_ts_record *pTS, u16 SeqNum)
94a79942 548{
7796d93e 549 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
8cba1432 550 struct rx_reorder_entry *pReorderEntry = NULL;
db8971b6
LF		 551 u8 WinSize = pHTInfo->RxReorderWinSize;
552 u16 WinEnd = 0;
553 u8 index = 0;
554 bool bMatchWinStart = false, bPktInBuf = false;
94a79942
LF		 555 unsigned long flags;
556
db8971b6
LF		 557 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq"
558 " is %d, WinSize is %d\n", __func__, SeqNum,
559 pTS->RxIndicateSeq, WinSize);
94a79942
LF		 560
561 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
562
db8971b6 563 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
94a79942 564 /* Rx Reorder initialize condition.*/
db8971b6 565 if (pTS->RxIndicateSeq == 0xffff)
94a79942 566 pTS->RxIndicateSeq = SeqNum;
94a79942
LF		 567
568 /* Drop out the packet which SeqNum is smaller than WinStart */
569 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
db8971b6 570 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
94a79942
LF		 571 pTS->RxIndicateSeq, SeqNum);
572 pHTInfo->RxReorderDropCounter++;
573 {
574 int i;
db8971b6 575 for (i = 0; i < prxb->nr_subframes; i++)
94a79942 576 dev_kfree_skb(prxb->subframes[i]);
94a79942
LF		 577 kfree(prxb);
578 prxb = NULL;
579 }
580 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
581 return;
582 }
583
584 /*
585 * Sliding window manipulation. Conditions includes:
586 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
587 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
588 */
589 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
590 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
591 bMatchWinStart = true;
592 } else if (SN_LESS(WinEnd, SeqNum)) {
db8971b6
LF		 593 if (SeqNum >= (WinSize - 1))
594 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
595 else
596 pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
597 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d,"
598 " NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
94a79942
LF		 599 }
600
601 /*
602 * Indication process.
db8971b6
LF		 603 * After Packet dropping and Sliding Window shifting as above, we can
604 * now just indicate the packets with the SeqNum smaller than latest
605 * WinStart and struct buffer other packets.
94a79942
LF		 606 */
607 /* For Rx Reorder condition:
608 * 1. All packets with SeqNum smaller than WinStart => Indicate
db8971b6
LF		 609 * 2. All packets with SeqNum larger than or equal to
610 * WinStart => Buffer it.
94a79942
LF		 611 */
612 if (bMatchWinStart) {
613 /* Current packet is going to be indicated.*/
db8971b6
LF		 614 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! "
615 "IndicateSeq: %d, NewSeq: %d\n",
94a79942 616 pTS->RxIndicateSeq, SeqNum);
2eed3dee 617 ieee->prxbIndicateArray[0] = prxb;
94a79942
LF		 618 index = 1;
619 } else {
620 /* Current packet is going to be inserted into pending list.*/
621 if (!list_empty(&ieee->RxReorder_Unused_List)) {
db8971b6
LF		 622 pReorderEntry = (struct rx_reorder_entry *)
623 list_entry(ieee->RxReorder_Unused_List.next,
624 struct rx_reorder_entry, List);
94a79942
LF		 625 list_del_init(&pReorderEntry->List);
626
627 /* Make a reorder entry and insert into a the packet list.*/
628 pReorderEntry->SeqNum = SeqNum;
629 pReorderEntry->prxb = prxb;
630
94a79942 631 if (!AddReorderEntry(pTS, pReorderEntry)) {
db8971b6
LF		 632 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
633 "%s(): Duplicate packet is "
634 "dropped!! IndicateSeq: %d, "
635 "NewSeq: %d\n",
636 __func__, pTS->RxIndicateSeq,
637 SeqNum);
638 list_add_tail(&pReorderEntry->List,
639 &ieee->RxReorder_Unused_List); {
94a79942 640 int i;
db8971b6 641 for (i = 0; i < prxb->nr_subframes; i++)
94a79942 642 dev_kfree_skb(prxb->subframes[i]);
94a79942
LF		 643 kfree(prxb);
644 prxb = NULL;
645 }
646 } else {
647 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
db8971b6
LF		 648 "Pkt insert into struct buffer!! "
649 "IndicateSeq: %d, NewSeq: %d\n",
650 pTS->RxIndicateSeq, SeqNum);
94a79942 651 }
db8971b6 652 } else {
94a79942 653 /*
db8971b6
LF		 654 * Packets are dropped if there are not enough reorder
655 * entries. This part should be modified!! We can just
656 * indicate all the packets in struct buffer and get
657 * reorder entries.
94a79942 658 */
db8971b6
LF		 659 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
660 " There is no reorder entry!! Packet is "
661 "dropped!!\n");
94a79942
LF		 662 {
663 int i;
db8971b6 664 for (i = 0; i < prxb->nr_subframes; i++)
94a79942 665 dev_kfree_skb(prxb->subframes[i]);
94a79942
LF		 666 kfree(prxb);
667 prxb = NULL;
668 }
669 }
670 }
671
672 /* Check if there is any packet need indicate.*/
db8971b6
LF		 673 while (!list_empty(&pTS->RxPendingPktList)) {
674 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
4f6807e8 675
db8971b6
LF		 676 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
677 struct rx_reorder_entry, List);
678 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
679 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
fc22c052 680 /* This protect struct buffer from overflow. */
94a79942 681 if (index >= REORDER_WIN_SIZE) {
db8971b6
LF		 682 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicate"
683 "Packet(): Buffer overflow!!\n");
94a79942
LF		 684 bPktInBuf = true;
685 break;
686 }
687
688 list_del_init(&pReorderEntry->List);
689
690 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
691 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
692
2eed3dee 693 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
db8971b6
LF		 694 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum"
695 " %d!\n", __func__, pReorderEntry->SeqNum);
94a79942
LF		 696 index++;
697
db8971b6
LF		 698 list_add_tail(&pReorderEntry->List,
699 &ieee->RxReorder_Unused_List);
94a79942
LF		 700 } else {
701 bPktInBuf = true;
702 break;
703 }
94a79942
LF		 704 }
705
db8971b6
LF		 706 /* Handling pending timer. Set this timer to prevent from long time
707 * Rx buffering.*/
708 if (index > 0) {
709 if (timer_pending(&pTS->RxPktPendingTimer))
94a79942 710 del_timer_sync(&pTS->RxPktPendingTimer);
94a79942
LF		 711 pTS->RxTimeoutIndicateSeq = 0xffff;
712
db8971b6
LF		 713 if (index > REORDER_WIN_SIZE) {
714 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
430fb250 715 " Rx Reorder struct buffer full!!\n");
db8971b6
LF		 716 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
717 flags);
94a79942
LF		 718 return;
719 }
2eed3dee 720 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
94a79942
LF		 721 bPktInBuf = false;
722 }
723
db8971b6
LF		 724 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
725 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
726 __func__);
94a79942 727 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
db8971b6
LF		 728 mod_timer(&pTS->RxPktPendingTimer, jiffies +
729 MSECS(pHTInfo->RxReorderPendingTime));
94a79942
LF		 730 }
731 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
732}
733
49aab5fd
LF		 734static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
735 struct rtllib_rx_stats *rx_stats,
736 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
94a79942 737{
db8971b6 738 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
94a79942
LF		 739 u16 fc = le16_to_cpu(hdr->frame_ctl);
740
db8971b6 741 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
94a79942
LF		 742 u16 ChkLength;
743 bool bIsAggregateFrame = false;
744 u16 nSubframe_Length;
745 u8 nPadding_Length = 0;
db8971b6 746 u16 SeqNum = 0;
94a79942 747 struct sk_buff *sub_skb;
db8971b6 748 u8 *data_ptr;
94a79942
LF		 749 /* just for debug purpose */
750 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
db8971b6
LF		 751 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
752 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
94a79942 753 bIsAggregateFrame = true;
94a79942 754
db8971b6 755 if (RTLLIB_QOS_HAS_SEQ(fc))
94a79942 756 LLCOffset += 2;
db8971b6 757 if (rx_stats->bContainHTC)
94a79942 758 LLCOffset += sHTCLng;
94a79942 759
db8971b6 760 ChkLength = LLCOffset;
94a79942 761
db8971b6 762 if (skb->len <= ChkLength)
94a79942 763 return 0;
94a79942
LF		 764
765 skb_pull(skb, LLCOffset);
766 ieee->bIsAggregateFrame = bIsAggregateFrame;
767 if (!bIsAggregateFrame) {
768 rxb->nr_subframes = 1;
769
770 /* altered by clark 3/30/2010
fc22c052 771 * The struct buffer size of the skb indicated to upper layer
94a79942
LF		 772 * must be less than 5000, or the defraged IP datagram
773 * in the IP layer will exceed "ipfrag_high_tresh" and be
774 * discarded. so there must not use the function
775 * "skb_copy" and "skb_clone" for "skb".
776 */
777
778 /* Allocate new skb for releasing to upper layer */
779 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
59aabd6a
IP		 780 if (!sub_skb)
781 return 0;
94a79942
LF		 782 skb_reserve(sub_skb, 12);
783 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
784 memcpy(data_ptr, skb->data, skb->len);
785 sub_skb->dev = ieee->dev;
786
787 rxb->subframes[0] = sub_skb;
788
db8971b6
LF		 789 memcpy(rxb->src, src, ETH_ALEN);
790 memcpy(rxb->dst, dst, ETH_ALEN);
94a79942
LF		 791 rxb->subframes[0]->dev = ieee->dev;
792 return 1;
793 } else {
794 rxb->nr_subframes = 0;
db8971b6
LF		 795 memcpy(rxb->src, src, ETH_ALEN);
796 memcpy(rxb->dst, dst, ETH_ALEN);
797 while (skb->len > ETHERNET_HEADER_SIZE) {
94a79942 798 /* Offset 12 denote 2 mac address */
db8971b6
LF		 799 nSubframe_Length = *((u16 *)(skb->data + 12));
800 nSubframe_Length = (nSubframe_Length >> 8) +
801 (nSubframe_Length << 8);
802
803 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
804 printk(KERN_INFO "%s: A-MSDU parse error!! "
805 "pRfd->nTotalSubframe : %d\n",\
806 __func__, rxb->nr_subframes);
807 printk(KERN_INFO "%s: A-MSDU parse error!! "
808 "Subframe Length: %d\n", __func__,
809 nSubframe_Length);
810 printk(KERN_INFO "nRemain_Length is %d and "
811 "nSubframe_Length is : %d\n", skb->len,
812 nSubframe_Length);
813 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
94a79942
LF		 814 return 0;
815 }
816
817 /* move the data point to data content */
818 skb_pull(skb, ETHERNET_HEADER_SIZE);
819
820 /* altered by clark 3/30/2010
fc22c052 821 * The struct buffer size of the skb indicated to upper layer
94a79942
LF		 822 * must be less than 5000, or the defraged IP datagram
823 * in the IP layer will exceed "ipfrag_high_tresh" and be
824 * discarded. so there must not use the function
825 * "skb_copy" and "skb_clone" for "skb".
826 */
827
828 /* Allocate new skb for releasing to upper layer */
829 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
59aabd6a
IP		 830 if (!sub_skb)
831 return 0;
94a79942
LF		 832 skb_reserve(sub_skb, 12);
833 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
db8971b6 834 memcpy(data_ptr, skb->data, nSubframe_Length);
94a79942
LF		 835
836 sub_skb->dev = ieee->dev;
837 rxb->subframes[rxb->nr_subframes++] = sub_skb;
838 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
db8971b6
LF		 839 RTLLIB_DEBUG_RX("ParseSubframe(): Too many "
840 "Subframes! Packets dropped!\n");
94a79942
LF		 841 break;
842 }
db8971b6 843 skb_pull(skb, nSubframe_Length);
94a79942
LF		 844
845 if (skb->len != 0) {
db8971b6
LF		 846 nPadding_Length = 4 - ((nSubframe_Length +
847 ETHERNET_HEADER_SIZE) % 4);
848 if (nPadding_Length == 4)
94a79942 849 nPadding_Length = 0;
94a79942 850
db8971b6 851 if (skb->len < nPadding_Length)
94a79942 852 return 0;
94a79942 853
db8971b6 854 skb_pull(skb, nPadding_Length);
94a79942
LF		 855 }
856 }
857
858 return rxb->nr_subframes;
859 }
860}
861
862
49aab5fd
LF		 863static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
864 struct sk_buff *skb,
865 struct rtllib_rx_stats *rx_stats)
94a79942
LF		 866{
867 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
868 u16 fc = le16_to_cpu(hdr->frame_ctl);
869 size_t hdrlen = 0;
870
871 hdrlen = rtllib_get_hdrlen(fc);
872 if (HTCCheck(ieee, skb->data)) {
873 if (net_ratelimit())
db8971b6 874 printk(KERN_INFO "%s: find HTCControl!\n", __func__);
94a79942 875 hdrlen += 4;
014e4c27 876 rx_stats->bContainHTC = true;
94a79942
LF		 877 }
878
879 if (RTLLIB_QOS_HAS_SEQ(fc))
014e4c27 880 rx_stats->bIsQosData = true;
94a79942
LF		 881
882 return hdrlen;
883}
884
49aab5fd
LF		 885static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
886 struct sk_buff *skb, u8 multicast)
94a79942
LF		 887{
888 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
889 u16 fc, sc;
890 u8 frag, type, stype;
891
892 fc = le16_to_cpu(hdr->frame_ctl);
893 type = WLAN_FC_GET_TYPE(fc);
894 stype = WLAN_FC_GET_STYPE(fc);
895 sc = le16_to_cpu(hdr->seq_ctl);
896 frag = WLAN_GET_SEQ_FRAG(sc);
897
db8971b6 898 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
94a79942
LF		 899 !ieee->current_network.qos_data.active ||
900 !IsDataFrame(skb->data) ||
901 IsLegacyDataFrame(skb->data)) {
db8971b6
LF		 902 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
903 if (is_duplicate_packet(ieee, hdr))
94a79942 904 return -1;
94a79942
LF		 905 }
906 } else {
2c47ae28 907 struct rx_ts_record *pRxTS = NULL;
74724de1 908 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
db8971b6 909 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
94a79942
LF		 910 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
911 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
912 return -1;
913 } else {
914 pRxTS->RxLastFragNum = frag;
915 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
916 }
917 } else {
db8971b6
LF		 918 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip"
919 " the check!!\n", __func__);
94a79942
LF		 920 return -1;
921 }
922 }
923
924 return 0;
925}
db8971b6 926
49aab5fd
LF		 927static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
928 struct rtllib_hdr_4addr *hdr, u8 *dst,
929 u8 *src, u8 *bssid)
94a79942
LF		 930{
931 u16 fc = le16_to_cpu(hdr->frame_ctl);
932
933 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
db8971b6
LF		 934 case RTLLIB_FCTL_FROMDS:
935 memcpy(dst, hdr->addr1, ETH_ALEN);
936 memcpy(src, hdr->addr3, ETH_ALEN);
937 memcpy(bssid, hdr->addr2, ETH_ALEN);
938 break;
939 case RTLLIB_FCTL_TODS:
940 memcpy(dst, hdr->addr3, ETH_ALEN);
941 memcpy(src, hdr->addr2, ETH_ALEN);
942 memcpy(bssid, hdr->addr1, ETH_ALEN);
943 break;
944 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
945 memcpy(dst, hdr->addr3, ETH_ALEN);
946 memcpy(src, hdr->addr4, ETH_ALEN);
947 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
948 break;
949 case 0:
950 memcpy(dst, hdr->addr1, ETH_ALEN);
951 memcpy(src, hdr->addr2, ETH_ALEN);
952 memcpy(bssid, hdr->addr3, ETH_ALEN);
953 break;
94a79942
LF		 954 }
955}
db8971b6 956
49aab5fd
LF		 957static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
958 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
94a79942 959{
94a79942
LF		 960 u8 type, stype;
961
962 type = WLAN_FC_GET_TYPE(fc);
963 stype = WLAN_FC_GET_STYPE(fc);
964
965 /* Filter frames from different BSS */
8329419a
JP		 966 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
967 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
968 !is_zero_ether_addr(ieee->current_network.bssid)) {
94a79942
LF		 969 return -1;
970 }
971
972 /* Filter packets sent by an STA that will be forwarded by AP */
db8971b6
LF		 973 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
974 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
94a79942 975 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
8329419a
JP		 976 !ether_addr_equal(dst, ieee->current_network.bssid) &&
977 ether_addr_equal(bssid, ieee->current_network.bssid)) {
94a79942
LF		 978 return -1;
979 }
980 }
981
982 /* Nullfunc frames may have PS-bit set, so they must be passed to
983 * hostap_handle_sta_rx() before being dropped here. */
db8971b6 984 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
94a79942
LF		 985 if (stype != RTLLIB_STYPE_DATA &&
986 stype != RTLLIB_STYPE_DATA_CFACK &&
987 stype != RTLLIB_STYPE_DATA_CFPOLL &&
db8971b6
LF		 988 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
989 stype != RTLLIB_STYPE_QOS_DATA) {
94a79942
LF		 990 if (stype != RTLLIB_STYPE_NULLFUNC)
991 RTLLIB_DEBUG_DROP(
992 "RX: dropped data frame "
993 "with no data (type=0x%02x, "
994 "subtype=0x%02x)\n",
995 type, stype);
996 return -1;
997 }
998 }
999
1000 if (ieee->iw_mode != IW_MODE_MESH) {
1001 /* packets from our adapter are dropped (echo) */
1002 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1003 return -1;
1004
1005 /* {broad,multi}cast packets to our BSS go through */
14fc4235 1006 if (is_multicast_ether_addr(dst)) {
db8971b6 1007 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
94a79942 1008 return -1;
94a79942
LF		 1009 }
1010 }
1011 return 0;
1012}
db8971b6 1013
49aab5fd 1014static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
32c44cb5 1015 struct lib80211_crypt_data **crypt, size_t hdrlen)
94a79942
LF		 1016{
1017 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1018 u16 fc = le16_to_cpu(hdr->frame_ctl);
1019 int idx = 0;
1020
1021 if (ieee->host_decrypt) {
1022 if (skb->len >= hdrlen + 3)
1023 idx = skb->data[hdrlen + 3] >> 6;
1024
0ddcf5fd 1025 *crypt = ieee->crypt_info.crypt[idx];
94a79942
LF		 1026 /* allow NULL decrypt to indicate an station specific override
1027 * for default encryption */
1028 if (*crypt && ((*crypt)->ops == NULL ||
1029 (*crypt)->ops->decrypt_mpdu == NULL))
1030 *crypt = NULL;
1031
1032 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1033 /* This seems to be triggered by some (multicast?)
1034 * frames from other than current BSS, so just drop the
1035 * frames silently instead of filling system log with
1036 * these reports. */
1037 RTLLIB_DEBUG_DROP("Decryption failed (not set)"
ac50ddaa
LF		 1038 " (SA= %pM)\n",
1039 hdr->addr2);
94a79942
LF		 1040 ieee->ieee_stats.rx_discards_undecryptable++;
1041 return -1;
1042 }
1043 }
1044
1045 return 0;
1046}
db8971b6 1047
49aab5fd 1048static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
db8971b6 1049 struct rtllib_rx_stats *rx_stats,
32c44cb5 1050 struct lib80211_crypt_data *crypt, size_t hdrlen)
94a79942
LF		 1051{
1052 struct rtllib_hdr_4addr *hdr;
1053 int keyidx = 0;
1054 u16 fc, sc;
1055 u8 frag;
1056
1057 hdr = (struct rtllib_hdr_4addr *)skb->data;
1058 fc = le16_to_cpu(hdr->frame_ctl);
1059 sc = le16_to_cpu(hdr->seq_ctl);
1060 frag = WLAN_GET_SEQ_FRAG(sc);
1061
db8971b6 1062 if ((!rx_stats->Decrypted))
94a79942 1063 ieee->need_sw_enc = 1;
db8971b6 1064 else
94a79942 1065 ieee->need_sw_enc = 0;
94a79942 1066
db8971b6
LF		 1067 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1068 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1069 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
94a79942
LF		 1070 return -1;
1071 }
1072
1073 hdr = (struct rtllib_hdr_4addr *) skb->data;
1074 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1075 int flen;
1076 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1077 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1078
1079 if (!frag_skb) {
1080 RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1081 "Rx cannot get skb from fragment "
1082 "cache (morefrag=%d seq=%u frag=%u)\n",
1083 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1084 WLAN_GET_SEQ_SEQ(sc), frag);
1085 return -1;
1086 }
1087 flen = skb->len;
1088 if (frag != 0)
1089 flen -= hdrlen;
1090
1091 if (frag_skb->tail + flen > frag_skb->end) {
1092 printk(KERN_WARNING "%s: host decrypted and "
1093 "reassembled frame did not fit skb\n",
1094 __func__);
1095 rtllib_frag_cache_invalidate(ieee, hdr);
1096 return -1;
1097 }
1098
1099 if (frag == 0) {
1100 /* copy first fragment (including full headers) into
1101 * beginning of the fragment cache skb */
1102 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1103 } else {
1104 /* append frame payload to the end of the fragment
1105 * cache skb */
1106 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1107 flen);
1108 }
1109 dev_kfree_skb_any(skb);
1110 skb = NULL;
1111
1112 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1113 /* more fragments expected - leave the skb in fragment
1114 * cache for now; it will be delivered to upper layers
1115 * after all fragments have been received */
1116 return -2;
1117 }
1118
1119 /* this was the last fragment and the frame will be
1120 * delivered, so remove skb from fragment cache */
1121 skb = frag_skb;
1122 hdr = (struct rtllib_hdr_4addr *) skb->data;
1123 rtllib_frag_cache_invalidate(ieee, hdr);
1124 }
1125
1126 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1127 * encrypted/authenticated */
1128 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
db8971b6
LF		 1129 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1130 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
94a79942
LF		 1131 return -1;
1132 }
1133
1134 hdr = (struct rtllib_hdr_4addr *) skb->data;
1135 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1136 if (/*ieee->ieee802_1x &&*/
1137 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1138
94a79942
LF		 1139 /* pass unencrypted EAPOL frames even if encryption is
1140 * configured */
1141 struct eapol *eap = (struct eapol *)(skb->data +
1142 24);
1143 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1144 eap_get_type(eap->type));
94a79942
LF		 1145 } else {
1146 RTLLIB_DEBUG_DROP(
1147 "encryption configured, but RX "
ac50ddaa
LF		 1148 "frame not encrypted (SA= %pM)\n",
1149 hdr->addr2);
94a79942
LF		 1150 return -1;
1151 }
1152 }
1153
94a79942
LF		 1154 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1155 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1156 struct eapol *eap = (struct eapol *)(skb->data +
1157 24);
1158 RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1159 eap_get_type(eap->type));
1160 }
94a79942
LF		 1161
1162 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1163 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1164 RTLLIB_DEBUG_DROP(
1165 "dropped unencrypted RX data "
ac50ddaa 1166 "frame from %pM"
94a79942 1167 " (drop_unencrypted=1)\n",
ac50ddaa 1168 hdr->addr2);
94a79942
LF		 1169 return -1;
1170 }
1171
db8971b6 1172 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
94a79942 1173 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
94a79942
LF		 1174
1175 return 0;
1176}
db8971b6 1177
49aab5fd 1178static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
94a79942 1179{
db8971b6 1180 if (unicast) {
94a79942 1181
db8971b6
LF		 1182 if ((ieee->state == RTLLIB_LINKED)) {
1183 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1184 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1185 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
94a79942
LF		 1186 if (ieee->LeisurePSLeave)
1187 ieee->LeisurePSLeave(ieee->dev);
1188 }
1189 }
1190 }
94a79942
LF		 1191 ieee->last_rx_ps_time = jiffies;
1192}
db8971b6 1193
49aab5fd 1194static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
94a79942 1195 struct rtllib_rx_stats *rx_stats,
db8971b6 1196 struct rtllib_rxb *rxb,
94a79942
LF		 1197 u8 *dst,
1198 u8 *src)
1199{
1200 struct net_device *dev = ieee->dev;
1201 u16 ethertype;
1202 int i = 0;
1203
db8971b6
LF		 1204 if (rxb == NULL) {
1205 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
94a79942
LF		 1206 return ;
1207 }
1208
db8971b6 1209 for (i = 0; i < rxb->nr_subframes; i++) {
94a79942
LF		 1210 struct sk_buff *sub_skb = rxb->subframes[i];
1211
1212 if (sub_skb) {
1213 /* convert hdr + possible LLC headers into Ethernet header */
1214 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1215 if (sub_skb->len >= 8 &&
db8971b6
LF		 1216 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1217 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1218 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
94a79942
LF		 1219 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1220 * replace EtherType */
1221 skb_pull(sub_skb, SNAP_SIZE);
1222 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1223 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1224 } else {
1225 u16 len;
1226 /* Leave Ethernet header part of hdr and full payload */
1f5a0d0c 1227 len = sub_skb->len;
94a79942
LF		 1228 memcpy(skb_push(sub_skb, 2), &len, 2);
1229 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1230 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1231 }
1232
1233 ieee->stats.rx_packets++;
1234 ieee->stats.rx_bytes += sub_skb->len;
1235
db8971b6 1236 if (is_multicast_ether_addr(dst))
94a79942 1237 ieee->stats.multicast++;
94a79942 1238
cd017123 1239 /* Indicate the packets to upper layer */
94a79942
LF		 1240 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1241 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1242 sub_skb->dev = dev;
1243 sub_skb->dev->stats.rx_packets++;
1244 sub_skb->dev->stats.rx_bytes += sub_skb->len;
94a79942 1245 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
94a79942
LF		 1246 netif_rx(sub_skb);
1247 }
1248 }
1249 kfree(rxb);
1250 rxb = NULL;
1251}
db8971b6 1252
49aab5fd 1253static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
94a79942
LF		 1254 struct rtllib_rx_stats *rx_stats)
1255{
1256 struct net_device *dev = ieee->dev;
1257 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
32c44cb5 1258 struct lib80211_crypt_data *crypt = NULL;
db8971b6 1259 struct rtllib_rxb *rxb = NULL;
2c47ae28 1260 struct rx_ts_record *pTS = NULL;
94a79942
LF		 1261 u16 fc, sc, SeqNum = 0;
1262 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1263 u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1264 size_t hdrlen = 0;
1265 bool bToOtherSTA = false;
1266 int ret = 0, i = 0;
1267
1268 hdr = (struct rtllib_hdr_4addr *)skb->data;
1269 fc = le16_to_cpu(hdr->frame_ctl);
1270 type = WLAN_FC_GET_TYPE(fc);
1271 stype = WLAN_FC_GET_STYPE(fc);
1272 sc = le16_to_cpu(hdr->seq_ctl);
1273
1274 /*Filter pkt not to me*/
14fc4235 1275 multicast = is_multicast_ether_addr(hdr->addr1);
94a79942 1276 unicast = !multicast;
8329419a 1277 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
94a79942
LF		 1278 if (ieee->bNetPromiscuousMode)
1279 bToOtherSTA = true;
1280 else
1281 goto rx_dropped;
1282 }
1283
1284 /*Filter pkt has too small length */
1285 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
db8971b6
LF		 1286 if (skb->len < hdrlen) {
1287 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
94a79942
LF		 1288 goto rx_dropped;
1289 }
1290
1291 /* Filter Duplicate pkt */
1292 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1293 if (ret < 0)
1294 goto rx_dropped;
1295
1296 /* Filter CTRL Frame */
db8971b6 1297 if (type == RTLLIB_FTYPE_CTL)
94a79942 1298 goto rx_dropped;
94a79942
LF		 1299
1300 /* Filter MGNT Frame */
1301 if (type == RTLLIB_FTYPE_MGMT) {
1302 if (bToOtherSTA)
1303 goto rx_dropped;
1304 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1305 goto rx_dropped;
1306 else
1307 goto rx_exit;
1308 }
1309
1310 /* Filter WAPI DATA Frame */
1311
1312 /* Update statstics for AP roaming */
db8971b6 1313 if (!bToOtherSTA) {
94a79942
LF		 1314 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1315 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1316 }
1317 dev->last_rx = jiffies;
1318
1319 /* Data frame - extract src/dst addresses */
1320 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1321
1322 /* Filter Data frames */
1323 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1324 if (ret < 0)
1325 goto rx_dropped;
1326
db8971b6 1327 if (skb->len == hdrlen)
94a79942 1328 goto rx_dropped;
94a79942
LF		 1329
1330 /* Send pspoll based on moredata */
1331 if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP)
1332 && (ieee->polling) && (!bToOtherSTA)) {
1333 if (WLAN_FC_MORE_DATA(fc)) {
1334 /* more data bit is set, let's request a new frame from the AP */
1335 rtllib_sta_ps_send_pspoll_frame(ieee);
1336 } else {
1337 ieee->polling = false;
1338 }
1339 }
1340
94a79942
LF		 1341 /* Get crypt if encrypted */
1342 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1343 if (ret == -1)
1344 goto rx_dropped;
1345
1346 /* Decrypt data frame (including reassemble) */
1347 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1348 if (ret == -1)
1349 goto rx_dropped;
1350 else if (ret == -2)
1351 goto rx_exit;
1352
1353 /* Get TS for Rx Reorder */
1354 hdr = (struct rtllib_hdr_4addr *) skb->data;
1355 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
14fc4235 1356 && !is_multicast_ether_addr(hdr->addr1)
db8971b6 1357 && (!bToOtherSTA)) {
94a79942
LF		 1358 TID = Frame_QoSTID(skb->data);
1359 SeqNum = WLAN_GET_SEQ_SEQ(sc);
db8971b6
LF		 1360 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1361 if (TID != 0 && TID != 3)
94a79942 1362 ieee->bis_any_nonbepkts = true;
94a79942
LF		 1363 }
1364
1365 /* Parse rx data frame (For AMSDU) */
1366 /* skb: hdr + (possible reassembled) full plaintext payload */
1367 payload = skb->data + hdrlen;
db8971b6
LF		 1368 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1369 if (rxb == NULL) {
1370 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1371 "%s(): kmalloc rxb error\n", __func__);
94a79942
LF		 1372 goto rx_dropped;
1373 }
1374 /* to parse amsdu packets */
1375 /* qos data packets & reserved bit is 1 */
db8971b6 1376 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
94a79942 1377 /* only to free rxb, and not submit the packets to upper layer */
db8971b6 1378 for (i = 0; i < rxb->nr_subframes; i++)
94a79942 1379 dev_kfree_skb(rxb->subframes[i]);
94a79942
LF		 1380 kfree(rxb);
1381 rxb = NULL;
1382 goto rx_dropped;
1383 }
1384
1385 /* Update WAPI PN */
1386
1387 /* Check if leave LPS */
db8971b6 1388 if (!bToOtherSTA) {
94a79942
LF		 1389 if (ieee->bIsAggregateFrame)
1390 nr_subframes = rxb->nr_subframes;
1391 else
1392 nr_subframes = 1;
1393 if (unicast)
1394 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1395 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1396 }
1397
1398 /* Indicate packets to upper layer or Rx Reorder */
db8971b6 1399 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
94a79942 1400 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
db8971b6 1401 else
94a79942 1402 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
94a79942
LF		 1403
1404 dev_kfree_skb(skb);
1405
1406 rx_exit:
1407 return 1;
1408
1409 rx_dropped:
db8971b6 1410 if (rxb != NULL) {
94a79942
LF		 1411 kfree(rxb);
1412 rxb = NULL;
1413 }
1414 ieee->stats.rx_dropped++;
1415
1416 /* Returning 0 indicates to caller that we have not handled the SKB--
1417 * so it is still allocated and can be used again by underlying
1418 * hardware as a DMA target */
1419 return 0;
1420}
1421
49aab5fd 1422static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
94a79942
LF		 1423 struct rtllib_rx_stats *rx_stats)
1424{
1425 return 0;
1426}
db8971b6 1427
49aab5fd 1428static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
94a79942
LF		 1429 struct rtllib_rx_stats *rx_stats)
1430{
1431 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1432 u16 fc = le16_to_cpu(hdr->frame_ctl);
1433 size_t hdrlen = rtllib_get_hdrlen(fc);
1434
db8971b6
LF		 1435 if (skb->len < hdrlen) {
1436 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
94a79942
LF		 1437 return 0;
1438 }
1439
1440 if (HTCCheck(ieee, skb->data)) {
1441 if (net_ratelimit())
db8971b6 1442 printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
94a79942
LF		 1443 hdrlen += 4;
1444 }
1445
94a79942
LF		 1446 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1447 ieee->stats.rx_packets++;
1448 ieee->stats.rx_bytes += skb->len;
3591733d 1449
94a79942
LF		 1450 return 1;
1451}
1452
49aab5fd 1453static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
94a79942
LF		 1454 struct rtllib_rx_stats *rx_stats)
1455{
1456 return 0;
1457}
1458
94a79942
LF		 1459/* All received frames are sent to this function. @skb contains the frame in
1460 * IEEE 802.11 format, i.e., in the format it was sent over air.
1461 * This function is called only as a tasklet (software IRQ). */
1462int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1463 struct rtllib_rx_stats *rx_stats)
1464{
1465 int ret = 0;
1466
db8971b6 1467 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
94a79942
LF		 1468 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1469 goto rx_dropped;
1470 }
1471 if (skb->len < 10) {
db8971b6 1472 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
94a79942
LF		 1473 goto rx_dropped;
1474 }
1475
1476 switch (ieee->iw_mode) {
1477 case IW_MODE_ADHOC:
1478 case IW_MODE_INFRA:
1479 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1480 break;
1481 case IW_MODE_MASTER:
1482 case IW_MODE_REPEAT:
1483 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1484 break;
1485 case IW_MODE_MONITOR:
1486 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1487 break;
1488 case IW_MODE_MESH:
1489 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1490 break;
1491 default:
1492 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1493 break;
1494 }
1495
1496 return ret;
1497
1498 rx_dropped:
1499 ieee->stats.rx_dropped++;
1500 return 0;
1501}
3b28499c 1502EXPORT_SYMBOL(rtllib_rx);
94a79942
LF		 1503
1504static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1505
1506/*
1507* Make ther structure we read from the beacon packet has
1508* the right values
1509*/
1510static int rtllib_verify_qos_info(struct rtllib_qos_information_element
db8971b6 1511 *info_element, int sub_type)
94a79942
LF		 1512{
1513
db8971b6
LF		 1514 if (info_element->qui_subtype != sub_type)
1515 return -1;
1516 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1517 return -1;
1518 if (info_element->qui_type != QOS_OUI_TYPE)
1519 return -1;
1520 if (info_element->version != QOS_VERSION_1)
1521 return -1;
94a79942 1522
db8971b6 1523 return 0;
94a79942
LF		 1524}
1525
1526
1527/*
1528 * Parse a QoS parameter element
1529 */
1530static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
db8971b6
LF		 1531 *element_param, struct rtllib_info_element
1532 *info_element)
94a79942 1533{
db8971b6
LF		 1534 int ret = 0;
1535 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1536
1537 if ((info_element == NULL) || (element_param == NULL))
1538 return -1;
1539
1540 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1541 memcpy(element_param->info_element.qui, info_element->data,
1542 info_element->len);
1543 element_param->info_element.elementID = info_element->id;
1544 element_param->info_element.length = info_element->len;
1545 } else
1546 ret = -1;
1547 if (ret == 0)
1548 ret = rtllib_verify_qos_info(&element_param->info_element,
1549 QOS_OUI_PARAM_SUB_TYPE);
1550 return ret;
94a79942
LF		 1551}
1552
1553/*
1554 * Parse a QoS information element
1555 */
1556static int rtllib_read_qos_info_element(struct
db8971b6
LF		 1557 rtllib_qos_information_element
1558 *element_info, struct rtllib_info_element
1559 *info_element)
94a79942 1560{
db8971b6
LF		 1561 int ret = 0;
1562 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1563
1564 if (element_info == NULL)
1565 return -1;
1566 if (info_element == NULL)
1567 return -1;
1568
1569 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1570 memcpy(element_info->qui, info_element->data,
1571 info_element->len);
1572 element_info->elementID = info_element->id;
1573 element_info->length = info_element->len;
1574 } else
1575 ret = -1;
1576
1577 if (ret == 0)
1578 ret = rtllib_verify_qos_info(element_info,
1579 QOS_OUI_INFO_SUB_TYPE);
1580 return ret;
94a79942
LF		 1581}
1582
1583
1584/*
1585 * Write QoS parameters from the ac parameters.
1586 */
1587static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1588 struct rtllib_qos_data *qos_data)
1589{
db8971b6 1590 struct rtllib_qos_ac_parameter *ac_params;
94a79942 1591 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
db8971b6 1592 int i;
94a79942
LF		 1593 u8 aci;
1594 u8 acm;
1595
1596 qos_data->wmm_acm = 0;
db8971b6
LF		 1597 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1598 ac_params = &(param_elm->ac_params_record[i]);
94a79942
LF		 1599
1600 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1601 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1602
1603 if (aci >= QOS_QUEUE_NUM)
1604 continue;
1605 switch (aci) {
db8971b6
LF		 1606 case 1:
1607 /* BIT(0) | BIT(3) */
1608 if (acm)
1609 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1610 break;
1611 case 2:
1612 /* BIT(4) | BIT(5) */
1613 if (acm)
1614 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1615 break;
1616 case 3:
1617 /* BIT(6) | BIT(7) */
1618 if (acm)
1619 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1620 break;
1621 case 0:
1622 default:
1623 /* BIT(1) | BIT(2) */
1624 if (acm)
1625 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1626 break;
94a79942
LF		 1627 }
1628
db8971b6 1629 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
94a79942
LF		 1630
1631 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
db8971b6 1632 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
94a79942 1633
1f5a0d0c 1634 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
94a79942 1635
1f5a0d0c 1636 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
94a79942 1637
db8971b6
LF		 1638 qos_param->flag[aci] =
1639 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1f5a0d0c 1640 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
db8971b6 1641 }
4764ca98 1642 return 0;
94a79942
LF		 1643}
1644
1645/*
1646 * we have a generic data element which it may contain QoS information or
1647 * parameters element. check the information element length to decide
1648 * which type to read
1649 */
1650static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
db8971b6
LF		 1651 *info_element,
1652 struct rtllib_network *network)
94a79942 1653{
db8971b6
LF		 1654 int rc = 0;
1655 struct rtllib_qos_information_element qos_info_element;
1656
1657 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1658
1659 if (rc == 0) {
1660 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1661 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1662 } else {
1663 struct rtllib_qos_parameter_info param_element;
1664
1665 rc = rtllib_read_qos_param_element(&param_element,
1666 info_element);
1667 if (rc == 0) {
1668 rtllib_qos_convert_ac_to_parameters(&param_element,
1669 &(network->qos_data));
1670 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1671 network->qos_data.param_count =
1672 param_element.info_element.ac_info & 0x0F;
1673 }
1674 }
1675
1676 if (rc == 0) {
1677 RTLLIB_DEBUG_QOS("QoS is supported\n");
1678 network->qos_data.supported = 1;
1679 }
1680 return rc;
94a79942
LF		 1681}
1682
94a79942
LF		 1683#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1684
1685static const char *get_info_element_string(u16 id)
1686{
db8971b6
LF		 1687 switch (id) {
1688 MFIE_STRING(SSID);
1689 MFIE_STRING(RATES);
1690 MFIE_STRING(FH_SET);
1691 MFIE_STRING(DS_SET);
1692 MFIE_STRING(CF_SET);
1693 MFIE_STRING(TIM);
1694 MFIE_STRING(IBSS_SET);
1695 MFIE_STRING(COUNTRY);
1696 MFIE_STRING(HOP_PARAMS);
1697 MFIE_STRING(HOP_TABLE);
1698 MFIE_STRING(REQUEST);
1699 MFIE_STRING(CHALLENGE);
1700 MFIE_STRING(POWER_CONSTRAINT);
1701 MFIE_STRING(POWER_CAPABILITY);
1702 MFIE_STRING(TPC_REQUEST);
1703 MFIE_STRING(TPC_REPORT);
1704 MFIE_STRING(SUPP_CHANNELS);
1705 MFIE_STRING(CSA);
1706 MFIE_STRING(MEASURE_REQUEST);
1707 MFIE_STRING(MEASURE_REPORT);
1708 MFIE_STRING(QUIET);
1709 MFIE_STRING(IBSS_DFS);
1710 MFIE_STRING(RSN);
1711 MFIE_STRING(RATES_EX);
1712 MFIE_STRING(GENERIC);
1713 MFIE_STRING(QOS_PARAMETER);
1714 default:
1715 return "UNKNOWN";
1716 }
94a79942 1717}
94a79942 1718
94a79942
LF		 1719static inline void rtllib_extract_country_ie(
1720 struct rtllib_device *ieee,
1721 struct rtllib_info_element *info_element,
1722 struct rtllib_network *network,
db8971b6 1723 u8 *addr2)
94a79942
LF		 1724{
1725 if (IS_DOT11D_ENABLE(ieee)) {
db8971b6 1726 if (info_element->len != 0) {
94a79942
LF		 1727 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1728 network->CountryIeLen = info_element->len;
1729
db8971b6 1730 if (!IS_COUNTRY_IE_VALID(ieee)) {
4bb01423 1731 if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
db8971b6 1732 printk(KERN_INFO "Received beacon ContryIE, SSID: <%s>\n", network->ssid);
94a79942
LF		 1733 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1734 }
1735 }
1736
db8971b6 1737 if (IS_EQUAL_CIE_SRC(ieee, addr2))
94a79942 1738 UPDATE_CIE_WATCHDOG(ieee);
94a79942
LF		 1739 }
1740
1741}
94a79942
LF		 1742
1743int rtllib_parse_info_param(struct rtllib_device *ieee,
1744 struct rtllib_info_element *info_element,
1745 u16 length,
1746 struct rtllib_network *network,
1747 struct rtllib_rx_stats *stats)
1748{
1749 u8 i;
1750 short offset;
db8971b6
LF		 1751 u16 tmp_htcap_len = 0;
1752 u16 tmp_htinfo_len = 0;
1753 u16 ht_realtek_agg_len = 0;
94a79942 1754 u8 ht_realtek_agg_buf[MAX_IE_LEN];
94a79942
LF		 1755 char rates_str[64];
1756 char *p;
8cc638e9 1757
94a79942
LF		 1758 while (length >= sizeof(*info_element)) {
1759 if (sizeof(*info_element) + info_element->len > length) {
1760 RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1761 "info_element->len + 2 > left : "
1762 "info_element->len+2=%zd left=%d, id=%d.\n",
1763 info_element->len +
1764 sizeof(*info_element),
1765 length, info_element->id);
1766 /* We stop processing but don't return an error here
1767 * because some misbehaviour APs break this rule. ie.
1768 * Orinoco AP1000. */
1769 break;
1770 }
1771
1772 switch (info_element->id) {
1773 case MFIE_TYPE_SSID:
1774 if (rtllib_is_empty_essid(info_element->data,
1775 info_element->len)) {
1776 network->flags |= NETWORK_EMPTY_ESSID;
1777 break;
1778 }
1779
1780 network->ssid_len = min(info_element->len,
1781 (u8) IW_ESSID_MAX_SIZE);
1782 memcpy(network->ssid, info_element->data, network->ssid_len);
1783 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1784 memset(network->ssid + network->ssid_len, 0,
1785 IW_ESSID_MAX_SIZE - network->ssid_len);
1786
1787 RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1788 network->ssid, network->ssid_len);
1789 break;
1790
1791 case MFIE_TYPE_RATES:
94a79942 1792 p = rates_str;
94a79942
LF		 1793 network->rates_len = min(info_element->len,
1794 MAX_RATES_LENGTH);
1795 for (i = 0; i < network->rates_len; i++) {
1796 network->rates[i] = info_element->data[i];
94a79942
LF		 1797 p += snprintf(p, sizeof(rates_str) -
1798 (p - rates_str), "%02X ",
1799 network->rates[i]);
94a79942
LF		 1800 if (rtllib_is_ofdm_rate
1801 (info_element->data[i])) {
1802 network->flags |= NETWORK_HAS_OFDM;
1803 if (info_element->data[i] &
1804 RTLLIB_BASIC_RATE_MASK)
1805 network->flags &=
1806 ~NETWORK_HAS_CCK;
1807 }
1808
1809 if (rtllib_is_cck_rate
1810 (info_element->data[i])) {
1811 network->flags |= NETWORK_HAS_CCK;
1812 }
1813 }
1814
1815 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1816 rates_str, network->rates_len);
1817 break;
1818
1819 case MFIE_TYPE_RATES_EX:
94a79942 1820 p = rates_str;
94a79942
LF		 1821 network->rates_ex_len = min(info_element->len,
1822 MAX_RATES_EX_LENGTH);
1823 for (i = 0; i < network->rates_ex_len; i++) {
1824 network->rates_ex[i] = info_element->data[i];
94a79942
LF		 1825 p += snprintf(p, sizeof(rates_str) -
1826 (p - rates_str), "%02X ",
03e71d6b 1827 network->rates_ex[i]);
94a79942
LF		 1828 if (rtllib_is_ofdm_rate
1829 (info_element->data[i])) {
1830 network->flags |= NETWORK_HAS_OFDM;
1831 if (info_element->data[i] &
1832 RTLLIB_BASIC_RATE_MASK)
1833 network->flags &=
1834 ~NETWORK_HAS_CCK;
1835 }
1836 }
1837
1838 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1839 rates_str, network->rates_ex_len);
1840 break;
1841
1842 case MFIE_TYPE_DS_SET:
1843 RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1844 info_element->data[0]);
1845 network->channel = info_element->data[0];
1846 break;
1847
1848 case MFIE_TYPE_FH_SET:
1849 RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1850 break;
1851
1852 case MFIE_TYPE_CF_SET:
1853 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1854 break;
1855
1856 case MFIE_TYPE_TIM:
1857 if (info_element->len < 4)
1858 break;
1859
1860 network->tim.tim_count = info_element->data[0];
1861 network->tim.tim_period = info_element->data[1];
1862
db8971b6
LF		 1863 network->dtim_period = info_element->data[1];
1864 if (ieee->state != RTLLIB_LINKED)
1865 break;
0dd56506 1866 network->last_dtim_sta_time = jiffies;
94a79942 1867
db8971b6 1868 network->dtim_data = RTLLIB_DTIM_VALID;
94a79942 1869
94a79942 1870
db8971b6
LF		 1871 if (info_element->data[2] & 1)
1872 network->dtim_data |= RTLLIB_DTIM_MBCAST;
94a79942 1873
db8971b6 1874 offset = (info_element->data[2] >> 1)*2;
94a79942 1875
94a79942 1876
db8971b6
LF		 1877 if (ieee->assoc_id < 8*offset ||
1878 ieee->assoc_id > 8*(offset + info_element->len - 3))
1879 break;
94a79942 1880
db8971b6
LF		 1881 offset = (ieee->assoc_id / 8) - offset;
1882 if (info_element->data[3 + offset] &
1883 (1 << (ieee->assoc_id % 8)))
1884 network->dtim_data |= RTLLIB_DTIM_UCAST;
94a79942
LF		 1885
1886 network->listen_interval = network->dtim_period;
1887 break;
1888
1889 case MFIE_TYPE_ERP:
1890 network->erp_value = info_element->data[0];
1891 network->flags |= NETWORK_HAS_ERP_VALUE;
1892 RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1893 network->erp_value);
1894 break;
1895 case MFIE_TYPE_IBSS_SET:
1896 network->atim_window = info_element->data[0];
1897 RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1898 network->atim_window);
1899 break;
1900
1901 case MFIE_TYPE_CHALLENGE:
1902 RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1903 break;
1904
1905 case MFIE_TYPE_GENERIC:
1906 RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1907 info_element->len);
1908 if (!rtllib_parse_qos_info_param_IE(info_element,
1909 network))
1910 break;
1911 if (info_element->len >= 4 &&
1912 info_element->data[0] == 0x00 &&
1913 info_element->data[1] == 0x50 &&
1914 info_element->data[2] == 0xf2 &&
1915 info_element->data[3] == 0x01) {
1916 network->wpa_ie_len = min(info_element->len + 2,
1917 MAX_WPA_IE_LEN);
1918 memcpy(network->wpa_ie, info_element,
1919 network->wpa_ie_len);
1920 break;
1921 }
db8971b6
LF		 1922 if (info_element->len == 7 &&
1923 info_element->data[0] == 0x00 &&
1924 info_element->data[1] == 0xe0 &&
1925 info_element->data[2] == 0x4c &&
1926 info_element->data[3] == 0x01 &&
1927 info_element->data[4] == 0x02)
1928 network->Turbo_Enable = 1;
94a79942
LF		 1929
1930 if (tmp_htcap_len == 0) {
1931 if (info_element->len >= 4 &&
1932 info_element->data[0] == 0x00 &&
1933 info_element->data[1] == 0x90 &&
1934 info_element->data[2] == 0x4c &&
1935 info_element->data[3] == 0x033) {
1936
db8971b6
LF		 1937 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1938 if (tmp_htcap_len != 0) {
94a79942 1939 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
db8971b6
LF		 1940 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
1941 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1942 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
94a79942
LF		 1943 }
1944 }
db8971b6 1945 if (tmp_htcap_len != 0) {
94a79942 1946 network->bssht.bdSupportHT = true;
e92b71d5 1947 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
db8971b6 1948 } else {
94a79942
LF		 1949 network->bssht.bdSupportHT = false;
1950 network->bssht.bdHT1R = false;
1951 }
1952 }
1953
1954
db8971b6 1955 if (tmp_htinfo_len == 0) {
94a79942 1956 if (info_element->len >= 4 &&
db8971b6
LF		 1957 info_element->data[0] == 0x00 &&
1958 info_element->data[1] == 0x90 &&
1959 info_element->data[2] == 0x4c &&
1960 info_element->data[3] == 0x034) {
1961 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1962 if (tmp_htinfo_len != 0) {
1963 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1964 if (tmp_htinfo_len) {
1965 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
1966 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1967 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
94a79942
LF		 1968 }
1969
db8971b6
LF		 1970 }
1971
94a79942
LF		 1972 }
1973 }
1974
db8971b6
LF		 1975 if (ieee->aggregation) {
1976 if (network->bssht.bdSupportHT) {
94a79942 1977 if (info_element->len >= 4 &&
db8971b6
LF		 1978 info_element->data[0] == 0x00 &&
1979 info_element->data[1] == 0xe0 &&
1980 info_element->data[2] == 0x4c &&
1981 info_element->data[3] == 0x02) {
1982 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1983 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
94a79942 1984 }
db8971b6 1985 if (ht_realtek_agg_len >= 5) {
94a79942
LF		 1986 network->realtek_cap_exit = true;
1987 network->bssht.bdRT2RTAggregation = true;
1988
1989 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
db8971b6 1990 network->bssht.bdRT2RTLongSlotTime = true;
94a79942 1991
db8971b6 1992 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
94a79942 1993 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
94a79942
LF		 1994 }
1995 }
db8971b6 1996 if (ht_realtek_agg_len >= 5) {
94a79942
LF		 1997 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1998 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1999 }
2000 }
2001
db8971b6
LF		 2002 if ((info_element->len >= 3 &&
2003 info_element->data[0] == 0x00 &&
2004 info_element->data[1] == 0x05 &&
2005 info_element->data[2] == 0xb5) ||
2006 (info_element->len >= 3 &&
2007 info_element->data[0] == 0x00 &&
2008 info_element->data[1] == 0x0a &&
2009 info_element->data[2] == 0xf7) ||
2010 (info_element->len >= 3 &&
2011 info_element->data[0] == 0x00 &&
2012 info_element->data[1] == 0x10 &&
2013 info_element->data[2] == 0x18)) {
2014 network->broadcom_cap_exist = true;
94a79942
LF		 2015 }
2016 if (info_element->len >= 3 &&
db8971b6
LF		 2017 info_element->data[0] == 0x00 &&
2018 info_element->data[1] == 0x0c &&
2019 info_element->data[2] == 0x43)
94a79942 2020 network->ralink_cap_exist = true;
94a79942 2021 if ((info_element->len >= 3 &&
db8971b6
LF		 2022 info_element->data[0] == 0x00 &&
2023 info_element->data[1] == 0x03 &&
2024 info_element->data[2] == 0x7f) ||
2025 (info_element->len >= 3 &&
2026 info_element->data[0] == 0x00 &&
2027 info_element->data[1] == 0x13 &&
2028 info_element->data[2] == 0x74))
94a79942 2029 network->atheros_cap_exist = true;
94a79942
LF		 2030
2031 if ((info_element->len >= 3 &&
db8971b6
LF		 2032 info_element->data[0] == 0x00 &&
2033 info_element->data[1] == 0x50 &&
2034 info_element->data[2] == 0x43))
2035 network->marvell_cap_exist = true;
94a79942 2036 if (info_element->len >= 3 &&
db8971b6
LF		 2037 info_element->data[0] == 0x00 &&
2038 info_element->data[1] == 0x40 &&
2039 info_element->data[2] == 0x96)
94a79942 2040 network->cisco_cap_exist = true;
94a79942
LF		 2041
2042
2043 if (info_element->len >= 3 &&
db8971b6
LF		 2044 info_element->data[0] == 0x00 &&
2045 info_element->data[1] == 0x0a &&
2046 info_element->data[2] == 0xf5)
94a79942 2047 network->airgo_cap_exist = true;
94a79942
LF		 2048
2049 if (info_element->len > 4 &&
db8971b6
LF		 2050 info_element->data[0] == 0x00 &&
2051 info_element->data[1] == 0x40 &&
2052 info_element->data[2] == 0x96 &&
2053 info_element->data[3] == 0x01) {
2054 if (info_element->len == 6) {
94a79942
LF		 2055 memcpy(network->CcxRmState, &info_element[4], 2);
2056 if (network->CcxRmState[0] != 0)
94a79942 2057 network->bCcxRmEnable = true;
94a79942
LF		 2058 else
2059 network->bCcxRmEnable = false;
2060 network->MBssidMask = network->CcxRmState[1] & 0x07;
db8971b6 2061 if (network->MBssidMask != 0) {
94a79942
LF		 2062 network->bMBssidValid = true;
2063 network->MBssidMask = 0xff << (network->MBssidMask);
2064 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2065 network->MBssid[5] &= network->MBssidMask;
db8971b6 2066 } else {
94a79942
LF		 2067 network->bMBssidValid = false;
2068 }
db8971b6 2069 } else {
94a79942
LF		 2070 network->bCcxRmEnable = false;
2071 }
2072 }
2073 if (info_element->len > 4 &&
db8971b6
LF		 2074 info_element->data[0] == 0x00 &&
2075 info_element->data[1] == 0x40 &&
2076 info_element->data[2] == 0x96 &&
2077 info_element->data[3] == 0x03) {
2078 if (info_element->len == 5) {
94a79942
LF		 2079 network->bWithCcxVerNum = true;
2080 network->BssCcxVerNumber = info_element->data[4];
db8971b6 2081 } else {
94a79942
LF		 2082 network->bWithCcxVerNum = false;
2083 network->BssCcxVerNumber = 0;
2084 }
2085 }
2086 if (info_element->len > 4 &&
db8971b6
LF		 2087 info_element->data[0] == 0x00 &&
2088 info_element->data[1] == 0x50 &&
2089 info_element->data[2] == 0xf2 &&
2090 info_element->data[3] == 0x04) {
94a79942
LF		 2091 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2092 info_element->len);
94a79942
LF		 2093 network->wzc_ie_len = min(info_element->len+2,
2094 MAX_WZC_IE_LEN);
2095 memcpy(network->wzc_ie, info_element,
2096 network->wzc_ie_len);
94a79942
LF		 2097 }
2098 break;
2099
2100 case MFIE_TYPE_RSN:
2101 RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2102 info_element->len);
2103 network->rsn_ie_len = min(info_element->len + 2,
2104 MAX_WPA_IE_LEN);
2105 memcpy(network->rsn_ie, info_element,
2106 network->rsn_ie_len);
2107 break;
2108
2109 case MFIE_TYPE_HT_CAP:
2110 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2111 info_element->len);
db8971b6
LF		 2112 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
2113 if (tmp_htcap_len != 0) {
94a79942 2114 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
db8971b6
LF		 2115 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2116 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2117 memcpy(network->bssht.bdHTCapBuf,
2118 info_element->data,
2119 network->bssht.bdHTCapLen);
94a79942
LF		 2120
2121 network->bssht.bdSupportHT = true;
db8971b6
LF		 2122 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2123 network->bssht.bdHTCapBuf))->MCS[1]) == 0;
94a79942 2124
db8971b6
LF		 2125 network->bssht.bdBandWidth = (enum ht_channel_width)
2126 (((struct ht_capab_ele *)
2127 (network->bssht.bdHTCapBuf))->ChlWidth);
2128 } else {
94a79942
LF		 2129 network->bssht.bdSupportHT = false;
2130 network->bssht.bdHT1R = false;
db8971b6 2131 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
94a79942
LF		 2132 }
2133 break;
2134
2135
2136 case MFIE_TYPE_HT_INFO:
2137 RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2138 info_element->len);
db8971b6
LF		 2139 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
2140 if (tmp_htinfo_len) {
94a79942 2141 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
db8971b6
LF		 2142 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2143 sizeof(network->bssht.bdHTInfoBuf) ?
2144 sizeof(network->bssht.bdHTInfoBuf) :
2145 tmp_htinfo_len;
2146 memcpy(network->bssht.bdHTInfoBuf,
2147 info_element->data,
2148 network->bssht.bdHTInfoLen);
94a79942
LF		 2149 }
2150 break;
2151
2152 case MFIE_TYPE_AIRONET:
2153 RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2154 info_element->len);
db8971b6 2155 if (info_element->len > IE_CISCO_FLAG_POSITION) {
94a79942
LF		 2156 network->bWithAironetIE = true;
2157
db8971b6
LF		 2158 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2159 & SUPPORT_CKIP_MIC) ||
2160 (info_element->data[IE_CISCO_FLAG_POSITION]
2161 & SUPPORT_CKIP_PK))
94a79942 2162 network->bCkipSupported = true;
94a79942 2163 else
94a79942 2164 network->bCkipSupported = false;
db8971b6 2165 } else {
94a79942
LF		 2166 network->bWithAironetIE = false;
2167 network->bCkipSupported = false;
2168 }
2169 break;
2170 case MFIE_TYPE_QOS_PARAMETER:
2171 printk(KERN_ERR
2172 "QoS Error need to parse QOS_PARAMETER IE\n");
2173 break;
2174
94a79942
LF		 2175 case MFIE_TYPE_COUNTRY:
2176 RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2177 info_element->len);
db8971b6
LF		 2178 rtllib_extract_country_ie(ieee, info_element, network,
2179 network->bssid);
94a79942 2180 break;
94a79942
LF		 2181/* TODO */
2182 default:
2183 RTLLIB_DEBUG_MGMT
2184 ("Unsupported info element: %s (%d)\n",
2185 get_info_element_string(info_element->id),
2186 info_element->id);
2187 break;
2188 }
2189
2190 length -= sizeof(*info_element) + info_element->len;
2191 info_element =
2192 (struct rtllib_info_element *)&info_element->
2193 data[info_element->len];
2194 }
2195
2196 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
db8971b6
LF		 2197 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2198 !network->bssht.bdRT2RTAggregation)
94a79942 2199 network->unknown_cap_exist = true;
94a79942 2200 else
94a79942 2201 network->unknown_cap_exist = false;
94a79942
LF		 2202 return 0;
2203}
2204
db8971b6 2205static inline u8 rtllib_SignalStrengthTranslate(u8 CurrSS)
94a79942
LF		 2206{
2207 u8 RetSS;
2208
2209 if (CurrSS >= 71 && CurrSS <= 100)
94a79942 2210 RetSS = 90 + ((CurrSS - 70) / 3);
94a79942 2211 else if (CurrSS >= 41 && CurrSS <= 70)
94a79942 2212 RetSS = 78 + ((CurrSS - 40) / 3);
94a79942 2213 else if (CurrSS >= 31 && CurrSS <= 40)
94a79942 2214 RetSS = 66 + (CurrSS - 30);
94a79942 2215 else if (CurrSS >= 21 && CurrSS <= 30)
94a79942 2216 RetSS = 54 + (CurrSS - 20);
94a79942 2217 else if (CurrSS >= 5 && CurrSS <= 20)
94a79942 2218 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
94a79942 2219 else if (CurrSS == 4)
94a79942 2220 RetSS = 36;
94a79942 2221 else if (CurrSS == 3)
94a79942 2222 RetSS = 27;
94a79942 2223 else if (CurrSS == 2)
94a79942 2224 RetSS = 18;
94a79942 2225 else if (CurrSS == 1)
94a79942 2226 RetSS = 9;
94a79942 2227 else
94a79942 2228 RetSS = CurrSS;
94a79942
LF		 2229
2230 return RetSS;
2231}
2232
49aab5fd 2233static long rtllib_translate_todbm(u8 signal_strength_index)
94a79942
LF		 2234{
2235 long signal_power;
2236
2237 signal_power = (long)((signal_strength_index + 1) >> 1);
2238 signal_power -= 95;
2239
2240 return signal_power;
2241}
2242
2243static inline int rtllib_network_init(
2244 struct rtllib_device *ieee,
2245 struct rtllib_probe_response *beacon,
2246 struct rtllib_network *network,
2247 struct rtllib_rx_stats *stats)
2248{
94a79942
LF		 2249
2250 /*
db8971b6
LF		 2251 network->qos_data.active = 0;
2252 network->qos_data.supported = 0;
2253 network->qos_data.param_count = 0;
2254 network->qos_data.old_param_count = 0;
94a79942
LF		 2255 */
2256 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2257
2258 /* Pull out fixed field data */
2259 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2260 network->capability = le16_to_cpu(beacon->capability);
2261 network->last_scanned = jiffies;
e0b1ca60
RK		 2262 network->time_stamp[0] = beacon->time_stamp[0];
2263 network->time_stamp[1] = beacon->time_stamp[1];
2264 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
94a79942
LF		 2265 /* Where to pull this? beacon->listen_interval;*/
2266 network->listen_interval = 0x0A;
2267 network->rates_len = network->rates_ex_len = 0;
2268 network->last_associate = 0;
2269 network->ssid_len = 0;
2270 network->hidden_ssid_len = 0;
2271 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2272 network->flags = 0;
2273 network->atim_window = 0;
2274 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
db8971b6 2275 0x3 : 0x0;
94a79942 2276 network->berp_info_valid = false;
db8971b6 2277 network->broadcom_cap_exist = false;
94a79942
LF		 2278 network->ralink_cap_exist = false;
2279 network->atheros_cap_exist = false;
2280 network->cisco_cap_exist = false;
2281 network->unknown_cap_exist = false;
2282 network->realtek_cap_exit = false;
2283 network->marvell_cap_exist = false;
2284 network->airgo_cap_exist = false;
2285 network->Turbo_Enable = 0;
2286 network->SignalStrength = stats->SignalStrength;
2287 network->RSSI = stats->SignalStrength;
94a79942
LF		 2288 network->CountryIeLen = 0;
2289 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
94a79942
LF		 2290 HTInitializeBssDesc(&network->bssht);
2291 if (stats->freq == RTLLIB_52GHZ_BAND) {
2292 /* for A band (No DS info) */
2293 network->channel = stats->received_channel;
2294 } else
2295 network->flags |= NETWORK_HAS_CCK;
2296
2297 network->wpa_ie_len = 0;
2298 network->rsn_ie_len = 0;
94a79942 2299 network->wzc_ie_len = 0;
94a79942 2300
db8971b6 2301 if (rtllib_parse_info_param(ieee,
94a79942
LF		 2302 beacon->info_element,
2303 (stats->len - sizeof(*beacon)),
2304 network,
2305 stats))
db8971b6 2306 return 1;
94a79942
LF		 2307
2308 network->mode = 0;
2309 if (stats->freq == RTLLIB_52GHZ_BAND)
2310 network->mode = IEEE_A;
2311 else {
2312 if (network->flags & NETWORK_HAS_OFDM)
2313 network->mode |= IEEE_G;
2314 if (network->flags & NETWORK_HAS_CCK)
2315 network->mode |= IEEE_B;
2316 }
2317
2318 if (network->mode == 0) {
ac50ddaa 2319 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' "
94a79942
LF		 2320 "network.\n",
2321 escape_essid(network->ssid,
2322 network->ssid_len),
ac50ddaa 2323 network->bssid);
94a79942
LF		 2324 return 1;
2325 }
2326
db8971b6 2327 if (network->bssht.bdSupportHT) {
94a79942
LF		 2328 if (network->mode == IEEE_A)
2329 network->mode = IEEE_N_5G;
2330 else if (network->mode & (IEEE_G | IEEE_B))
2331 network->mode = IEEE_N_24G;
2332 }
2333 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2334 network->flags |= NETWORK_EMPTY_ESSID;
2335 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
db8971b6 2336 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
94a79942
LF		 2337
2338 memcpy(&network->stats, stats, sizeof(network->stats));
2339
2340 return 0;
2341}
2342
2343static inline int is_same_network(struct rtllib_network *src,
2344 struct rtllib_network *dst, u8 ssidbroad)
2345{
2346 /* A network is only a duplicate if the channel, BSSID, ESSID
2347 * and the capability field (in particular IBSS and BSS) all match.
2348 * We treat all <hidden> with the same BSSID and channel
2349 * as one network */
db8971b6 2350 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
94a79942
LF		 2351 (src->channel == dst->channel) &&
2352 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
db8971b6
LF		 2353 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2354 (!ssidbroad)) &&
94a79942
LF		 2355 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2356 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2357 ((src->capability & WLAN_CAPABILITY_ESS) ==
2358 (dst->capability & WLAN_CAPABILITY_ESS)));
2359}
2360
2361static inline void update_ibss_network(struct rtllib_network *dst,
2362 struct rtllib_network *src)
2363{
2364 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2365 dst->last_scanned = jiffies;
2366}
2367
2368
2369static inline void update_network(struct rtllib_network *dst,
2370 struct rtllib_network *src)
2371{
2372 int qos_active;
2373 u8 old_param;
2374
2375 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2376 dst->capability = src->capability;
2377 memcpy(dst->rates, src->rates, src->rates_len);
2378 dst->rates_len = src->rates_len;
2379 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2380 dst->rates_ex_len = src->rates_ex_len;
db8971b6
LF		 2381 if (src->ssid_len > 0) {
2382 if (dst->ssid_len == 0) {
94a79942
LF		 2383 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2384 dst->hidden_ssid_len = src->ssid_len;
2385 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
db8971b6 2386 } else {
94a79942
LF		 2387 memset(dst->ssid, 0, dst->ssid_len);
2388 dst->ssid_len = src->ssid_len;
2389 memcpy(dst->ssid, src->ssid, src->ssid_len);
2390 }
2391 }
2392 dst->mode = src->mode;
2393 dst->flags = src->flags;
2394 dst->time_stamp[0] = src->time_stamp[0];
2395 dst->time_stamp[1] = src->time_stamp[1];
db8971b6 2396 if (src->flags & NETWORK_HAS_ERP_VALUE) {
94a79942
LF		 2397 dst->erp_value = src->erp_value;
2398 dst->berp_info_valid = src->berp_info_valid = true;
2399 }
2400 dst->beacon_interval = src->beacon_interval;
2401 dst->listen_interval = src->listen_interval;
2402 dst->atim_window = src->atim_window;
2403 dst->dtim_period = src->dtim_period;
2404 dst->dtim_data = src->dtim_data;
0dd56506 2405 dst->last_dtim_sta_time = src->last_dtim_sta_time;
94a79942
LF		 2406 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2407
db8971b6 2408 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
94a79942 2409 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
db8971b6
LF		 2410 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2411 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2412 src->bssht.bdHTCapLen);
2413 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2414 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2415 src->bssht.bdHTInfoLen);
94a79942
LF		 2416 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2417 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2418 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2419 dst->ralink_cap_exist = src->ralink_cap_exist;
2420 dst->atheros_cap_exist = src->atheros_cap_exist;
2421 dst->realtek_cap_exit = src->realtek_cap_exit;
2422 dst->marvell_cap_exist = src->marvell_cap_exist;
2423 dst->cisco_cap_exist = src->cisco_cap_exist;
2424 dst->airgo_cap_exist = src->airgo_cap_exist;
2425 dst->unknown_cap_exist = src->unknown_cap_exist;
2426 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2427 dst->wpa_ie_len = src->wpa_ie_len;
2428 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2429 dst->rsn_ie_len = src->rsn_ie_len;
94a79942
LF		 2430 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2431 dst->wzc_ie_len = src->wzc_ie_len;
94a79942
LF		 2432
2433 dst->last_scanned = jiffies;
2434 /* qos related parameters */
2435 qos_active = dst->qos_data.active;
2436 old_param = dst->qos_data.param_count;
2437 dst->qos_data.supported = src->qos_data.supported;
2438 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
db8971b6
LF		 2439 memcpy(&dst->qos_data, &src->qos_data,
2440 sizeof(struct rtllib_qos_data));
94a79942
LF		 2441 if (dst->qos_data.supported == 1) {
2442 if (dst->ssid_len)
2443 RTLLIB_DEBUG_QOS
2444 ("QoS the network %s is QoS supported\n",
2445 dst->ssid);
2446 else
2447 RTLLIB_DEBUG_QOS
2448 ("QoS the network is QoS supported\n");
2449 }
2450 dst->qos_data.active = qos_active;
2451 dst->qos_data.old_param_count = old_param;
2452
2453 /* dst->last_associate is not overwritten */
2454 dst->wmm_info = src->wmm_info;
db8971b6
LF		 2455 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2456 src->wmm_param[1].ac_aci_acm_aifsn ||
2457 src->wmm_param[2].ac_aci_acm_aifsn ||
a2f9dc55 2458 src->wmm_param[3].ac_aci_acm_aifsn)
db8971b6 2459 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
94a79942
LF		 2460
2461 dst->SignalStrength = src->SignalStrength;
2462 dst->RSSI = src->RSSI;
2463 dst->Turbo_Enable = src->Turbo_Enable;
2464
94a79942
LF		 2465 dst->CountryIeLen = src->CountryIeLen;
2466 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
94a79942
LF		 2467
2468 dst->bWithAironetIE = src->bWithAironetIE;
2469 dst->bCkipSupported = src->bCkipSupported;
db8971b6 2470 memcpy(dst->CcxRmState, src->CcxRmState, 2);
94a79942
LF		 2471 dst->bCcxRmEnable = src->bCcxRmEnable;
2472 dst->MBssidMask = src->MBssidMask;
2473 dst->bMBssidValid = src->bMBssidValid;
db8971b6 2474 memcpy(dst->MBssid, src->MBssid, 6);
94a79942
LF		 2475 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2476 dst->BssCcxVerNumber = src->BssCcxVerNumber;
94a79942 2477}
db8971b6 2478
94a79942
LF		 2479static inline int is_beacon(__le16 fc)
2480{
2481 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2482}
2483
db8971b6 2484static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
94a79942
LF		 2485{
2486 if (MAX_CHANNEL_NUMBER < channel) {
db8971b6 2487 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
94a79942
LF		 2488 return 0;
2489 }
2490
2491 if (rtllib->active_channel_map[channel] == 2)
2492 return 1;
2493
2494 return 0;
2495}
2496
976d5341 2497int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
94a79942
LF		 2498{
2499 if (MAX_CHANNEL_NUMBER < channel) {
db8971b6 2500 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
94a79942
LF		 2501 return 0;
2502 }
2503 if (rtllib->active_channel_map[channel] > 0)
2504 return 1;
2505
2506 return 0;
2507}
976d5341 2508EXPORT_SYMBOL(rtllib_legal_channel);
94a79942 2509
94a79942
LF		 2510static inline void rtllib_process_probe_response(
2511 struct rtllib_device *ieee,
2512 struct rtllib_probe_response *beacon,
2513 struct rtllib_rx_stats *stats)
2514{
2515 struct rtllib_network *target;
2516 struct rtllib_network *oldest = NULL;
94a79942 2517 struct rtllib_info_element *info_element = &beacon->info_element[0];
94a79942
LF		 2518 unsigned long flags;
2519 short renew;
db8971b6
LF		 2520 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2521 GFP_ATOMIC);
94a79942 2522
cb762154 2523 if (!network)
94a79942 2524 return;
94a79942
LF		 2525
2526 RTLLIB_DEBUG_SCAN(
ac50ddaa 2527 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
94a79942 2528 escape_essid(info_element->data, info_element->len),
ac50ddaa 2529 beacon->header.addr3,
26a6b074
RK		 2530 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2531 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2532 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2533 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2534 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2535 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2536 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2537 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2538 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2539 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2540 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2541 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2542 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2543 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2544 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2545 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
94a79942
LF		 2546
2547 if (rtllib_network_init(ieee, beacon, network, stats)) {
ac50ddaa 2548 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
db8971b6
LF		 2549 escape_essid(info_element->data,
2550 info_element->len),
ac50ddaa 2551 beacon->header.addr3,
26a6b074
RK		 2552 WLAN_FC_GET_STYPE(
2553 le16_to_cpu(beacon->header.frame_ctl)) ==
db8971b6
LF		 2554 RTLLIB_STYPE_PROBE_RESP ?
2555 "PROBE RESPONSE" : "BEACON");
94a79942
LF		 2556 goto free_network;
2557 }
2558
2559
976d5341 2560 if (!rtllib_legal_channel(ieee, network->channel))
94a79942
LF		 2561 goto free_network;
2562
26a6b074 2563 if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
db8971b6 2564 RTLLIB_STYPE_PROBE_RESP) {
94a79942 2565 if (IsPassiveChannel(ieee, network->channel)) {
db8971b6
LF		 2566 printk(KERN_INFO "GetScanInfo(): For Global Domain, "
2567 "filter probe response at channel(%d).\n",
2568 network->channel);
94a79942
LF		 2569 goto free_network;
2570 }
2571 }
2572
2573 /* The network parsed correctly -- so now we scan our known networks
2574 * to see if we can find it in our list.
2575 *
2576 * NOTE: This search is definitely not optimized. Once its doing
db8971b6
LF		 2577 * the "right thing" we'll optimize it for efficiency if
2578 * necessary */
94a79942
LF		 2579
2580 /* Search for this entry in the list and update it if it is
2581 * already there. */
2582
2583 spin_lock_irqsave(&ieee->lock, flags);
db8971b6
LF		 2584 if (is_same_network(&ieee->current_network, network,
2585 (network->ssid_len ? 1 : 0))) {
2586 update_network(&ieee->current_network, network);
2587 if ((ieee->current_network.mode == IEEE_N_24G ||
2588 ieee->current_network.mode == IEEE_G)
2589 && ieee->current_network.berp_info_valid) {
2590 if (ieee->current_network.erp_value & ERP_UseProtection)
94a79942 2591 ieee->current_network.buseprotection = true;
db8971b6
LF		 2592 else
2593 ieee->current_network.buseprotection = false;
94a79942 2594 }
db8971b6
LF		 2595 if (is_beacon(beacon->header.frame_ctl)) {
2596 if (ieee->state >= RTLLIB_LINKED)
2597 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
94a79942
LF		 2598 }
2599 }
94a79942 2600 list_for_each_entry(target, &ieee->network_list, list) {
db8971b6
LF		 2601 if (is_same_network(target, network,
2602 (target->ssid_len ? 1 : 0)))
94a79942
LF		 2603 break;
2604 if ((oldest == NULL) ||
2605 (target->last_scanned < oldest->last_scanned))
2606 oldest = target;
2607 }
2608
2609 /* If we didn't find a match, then get a new network slot to initialize
2610 * with this beacon's information */
2611 if (&target->list == &ieee->network_list) {
2612 if (list_empty(&ieee->network_free_list)) {
2613 /* If there are no more slots, expire the oldest */
2614 list_del(&oldest->list);
2615 target = oldest;
ac50ddaa 2616 RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from "
94a79942
LF		 2617 "network list.\n",
2618 escape_essid(target->ssid,
2619 target->ssid_len),
ac50ddaa 2620 target->bssid);
94a79942
LF		 2621 } else {
2622 /* Otherwise just pull from the free list */
2623 target = list_entry(ieee->network_free_list.next,
2624 struct rtllib_network, list);
2625 list_del(ieee->network_free_list.next);
2626 }
2627
2628
ac50ddaa 2629 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
db8971b6 2630 escape_essid(network->ssid,
ac50ddaa 2631 network->ssid_len), network->bssid,
26a6b074
RK		 2632 WLAN_FC_GET_STYPE(
2633 le16_to_cpu(beacon->header.frame_ctl)) ==
db8971b6
LF		 2634 RTLLIB_STYPE_PROBE_RESP ?
2635 "PROBE RESPONSE" : "BEACON");
94a79942
LF		 2636 memcpy(target, network, sizeof(*target));
2637 list_add_tail(&target->list, &ieee->network_list);
2638 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2639 rtllib_softmac_new_net(ieee, network);
2640 } else {
ac50ddaa 2641 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
db8971b6 2642 escape_essid(target->ssid,
ac50ddaa 2643 target->ssid_len), target->bssid,
26a6b074
RK		 2644 WLAN_FC_GET_STYPE(
2645 le16_to_cpu(beacon->header.frame_ctl)) ==
db8971b6
LF		 2646 RTLLIB_STYPE_PROBE_RESP ?
2647 "PROBE RESPONSE" : "BEACON");
2648
2649 /* we have an entry and we are going to update it. But this
2650 * entry may be already expired. In this case we do the same
2651 * as we found a new net and call the new_net handler
94a79942 2652 */
db8971b6
LF		 2653 renew = !time_after(target->last_scanned + ieee->scan_age,
2654 jiffies);
94a79942 2655 if ((!target->ssid_len) &&
db8971b6
LF		 2656 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2657 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2658 (strncmp(ieee->current_network.ssid, network->ssid,
2659 network->ssid_len) == 0) &&
2660 (ieee->state == RTLLIB_NOLINK))))
94a79942 2661 renew = 1;
94a79942
LF		 2662 update_network(target, network);
2663 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2664 rtllib_softmac_new_net(ieee, network);
2665 }
2666
2667 spin_unlock_irqrestore(&ieee->lock, flags);
db8971b6
LF		 2668 if (is_beacon(beacon->header.frame_ctl) &&
2669 is_same_network(&ieee->current_network, network,
2670 (network->ssid_len ? 1 : 0)) &&
2671 (ieee->state == RTLLIB_LINKED)) {
2672 if (ieee->handle_beacon != NULL)
2673 ieee->handle_beacon(ieee->dev, beacon,
2674 &ieee->current_network);
94a79942
LF		 2675 }
2676free_network:
2677 kfree(network);
2678 return;
2679}
2680
2681void rtllib_rx_mgt(struct rtllib_device *ieee,
db8971b6 2682 struct sk_buff *skb,
94a79942
LF		 2683 struct rtllib_rx_stats *stats)
2684{
db8971b6
LF		 2685 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2686
26a6b074
RK		 2687 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2688 RTLLIB_STYPE_PROBE_RESP) &&
2689 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2690 RTLLIB_STYPE_BEACON))
db8971b6
LF		 2691 ieee->last_rx_ps_time = jiffies;
2692
26a6b074 2693 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
db8971b6
LF		 2694
2695 case RTLLIB_STYPE_BEACON:
2696 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
26a6b074 2697 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
db8971b6
LF		 2698 RTLLIB_DEBUG_SCAN("Beacon\n");
2699 rtllib_process_probe_response(
2700 ieee, (struct rtllib_probe_response *)header,
2701 stats);
94a79942 2702
db8971b6
LF		 2703 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2704 ieee->iw_mode == IW_MODE_INFRA &&
2705 ieee->state == RTLLIB_LINKED))
2706 tasklet_schedule(&ieee->ps_task);
2707
2708 break;
2709
2710 case RTLLIB_STYPE_PROBE_RESP:
2711 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
26a6b074 2712 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
db8971b6
LF		 2713 RTLLIB_DEBUG_SCAN("Probe response\n");
2714 rtllib_process_probe_response(ieee,
2715 (struct rtllib_probe_response *)header, stats);
2716 break;
2717 case RTLLIB_STYPE_PROBE_REQ:
2718 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
26a6b074
RK		 2719 WLAN_FC_GET_STYPE(
2720 le16_to_cpu(header->frame_ctl)));
db8971b6
LF		 2721 RTLLIB_DEBUG_SCAN("Probe request\n");
2722 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2723 ((ieee->iw_mode == IW_MODE_ADHOC ||
2724 ieee->iw_mode == IW_MODE_MASTER) &&
2725 ieee->state == RTLLIB_LINKED))
2726 rtllib_rx_probe_rq(ieee, skb);
2727 break;
2728 }
94a79942 2729}
Linux kernel - Deliverables
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