1 /******************************************************************************
2
3 Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
4
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of version 2 of the GNU General Public License as
7 published by the Free Software Foundation.
8
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 more details.
13
14 You should have received a copy of the GNU General Public License along with
15 this program; if not, write to the Free Software Foundation, Inc., 59
16 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18 The full GNU General Public License is included in this distribution in the
19 file called LICENSE.
20
21 Contact Information:
22 James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24
25 ******************************************************************************
26
27 Few modifications for Realtek's Wi-Fi drivers by
28 Andrea Merello <andreamrl@tiscali.it>
29
30 A special thanks goes to Realtek for their support !
31
32 ******************************************************************************/
33
34 #include <linux/compiler.h>
35 //#include <linux/config.h>
36 #include <linux/errno.h>
37 #include <linux/if_arp.h>
38 #include <linux/in6.h>
39 #include <linux/in.h>
40 #include <linux/ip.h>
41 #include <linux/kernel.h>
42 #include <linux/module.h>
43 #include <linux/netdevice.h>
44 #include <linux/pci.h>
45 #include <linux/proc_fs.h>
46 #include <linux/skbuff.h>
47 #include <linux/slab.h>
48 #include <linux/tcp.h>
49 #include <linux/types.h>
50 #include <linux/wireless.h>
51 #include <linux/etherdevice.h>
52 #include <asm/uaccess.h>
53 #include <linux/if_vlan.h>
54
55 #include "ieee80211.h"
56
57
58 /*
59
60
61 802.11 Data Frame
62
63
64 802.11 frame_contorl for data frames - 2 bytes
65 ,-----------------------------------------------------------------------------------------.
66 bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
67 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
68 val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
69 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
70 desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep |
71 | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | |
72 '-----------------------------------------------------------------------------------------'
73 /\
74 |
75 802.11 Data Frame |
76 ,--------- 'ctrl' expands to >-----------'
77 |
78 ,--'---,-------------------------------------------------------------.
79 Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
80 |------|------|---------|---------|---------|------|---------|------|
81 Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
82 | | tion | (BSSID) | | | ence | data | |
83 `--------------------------------------------------| |------'
84 Total: 28 non-data bytes `----.----'
85 |
86 .- 'Frame data' expands to <---------------------------'
87 |
88 V
89 ,---------------------------------------------------.
90 Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
91 |------|------|---------|----------|------|---------|
92 Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
93 | DSAP | SSAP | | | | Packet |
94 | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
95 `-----------------------------------------| |
96 Total: 8 non-data bytes `----.----'
97 |
98 .- 'IP Packet' expands, if WEP enabled, to <--'
99 |
100 V
101 ,-----------------------.
102 Bytes | 4 | 0-2296 | 4 |
103 |-----|-----------|-----|
104 Desc. | IV | Encrypted | ICV |
105 | | IP Packet | |
106 `-----------------------'
107 Total: 8 non-data bytes
108
109
110 802.3 Ethernet Data Frame
111
112 ,-----------------------------------------.
113 Bytes | 6 | 6 | 2 | Variable | 4 |
114 |-------|-------|------|-----------|------|
115 Desc. | Dest. | Source| Type | IP Packet | fcs |
116 | MAC | MAC | | | |
117 `-----------------------------------------'
118 Total: 18 non-data bytes
119
120 In the event that fragmentation is required, the incoming payload is split into
121 N parts of size ieee->fts. The first fragment contains the SNAP header and the
122 remaining packets are just data.
123
124 If encryption is enabled, each fragment payload size is reduced by enough space
125 to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
126 So if you have 1500 bytes of payload with ieee->fts set to 500 without
127 encryption it will take 3 frames. With WEP it will take 4 frames as the
128 payload of each frame is reduced to 492 bytes.
129
130 * SKB visualization
131 *
132 * ,- skb->data
133 * |
134 * | ETHERNET HEADER ,-<-- PAYLOAD
135 * | | 14 bytes from skb->data
136 * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
137 * | | | |
138 * |,-Dest.--. ,--Src.---. | | |
139 * | 6 bytes| | 6 bytes | | | |
140 * v | | | | | |
141 * 0 | v 1 | v | v 2
142 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
143 * ^ | ^ | ^ |
144 * | | | | | |
145 * | | | | `T' <---- 2 bytes for Type
146 * | | | |
147 * | | '---SNAP--' <-------- 6 bytes for SNAP
148 * | |
149 * `-IV--' <-------------------- 4 bytes for IV (WEP)
150 *
151 * SNAP HEADER
152 *
153 */
154
155 static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
156 static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
157
ieee80211_put_snap(u8 * data,u16 h_proto)158 static inline int ieee80211_put_snap(u8 *data, u16 h_proto)
159 {
160 struct ieee80211_snap_hdr *snap;
161 u8 *oui;
162
163 snap = (struct ieee80211_snap_hdr *)data;
164 snap->dsap = 0xaa;
165 snap->ssap = 0xaa;
166 snap->ctrl = 0x03;
167
168 if (h_proto == 0x8137 || h_proto == 0x80f3)
169 oui = P802_1H_OUI;
170 else
171 oui = RFC1042_OUI;
172 snap->oui[0] = oui[0];
173 snap->oui[1] = oui[1];
174 snap->oui[2] = oui[2];
175
176 *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
177
178 return SNAP_SIZE + sizeof(u16);
179 }
180
ieee80211_encrypt_fragment(struct ieee80211_device * ieee,struct sk_buff * frag,int hdr_len)181 int ieee80211_encrypt_fragment(
182 struct ieee80211_device *ieee,
183 struct sk_buff *frag,
184 int hdr_len)
185 {
186 struct ieee80211_crypt_data* crypt = ieee->crypt[ieee->tx_keyidx];
187 int res;
188
189 if (!(crypt && crypt->ops))
190 {
191 printk("=========>%s(), crypt is null\n", __FUNCTION__);
192 return -1;
193 }
194 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
195 struct ieee80211_hdr *header;
196
197 if (ieee->tkip_countermeasures &&
198 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
199 header = (struct ieee80211_hdr *) frag->data;
200 if (net_ratelimit()) {
201 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
202 "TX packet to %pM\n",
203 ieee->dev->name, header->addr1);
204 }
205 return -1;
206 }
207 #endif
208 /* To encrypt, frame format is:
209 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */
210
211 // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption.
212 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
213 * call both MSDU and MPDU encryption functions from here. */
214 atomic_inc(&crypt->refcnt);
215 res = 0;
216 if (crypt->ops->encrypt_msdu)
217 res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv);
218 if (res == 0 && crypt->ops->encrypt_mpdu)
219 res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv);
220
221 atomic_dec(&crypt->refcnt);
222 if (res < 0) {
223 printk(KERN_INFO "%s: Encryption failed: len=%d.\n",
224 ieee->dev->name, frag->len);
225 ieee->ieee_stats.tx_discards++;
226 return -1;
227 }
228
229 return 0;
230 }
231
232
ieee80211_txb_free(struct ieee80211_txb * txb)233 void ieee80211_txb_free(struct ieee80211_txb *txb) {
234 //int i;
235 if (unlikely(!txb))
236 return;
237 kfree(txb);
238 }
239
ieee80211_alloc_txb(int nr_frags,int txb_size,int gfp_mask)240 struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
241 int gfp_mask)
242 {
243 struct ieee80211_txb *txb;
244 int i;
245 txb = kmalloc(
246 sizeof(struct ieee80211_txb) + (sizeof(u8*) * nr_frags),
247 gfp_mask);
248 if (!txb)
249 return NULL;
250
251 memset(txb, 0, sizeof(struct ieee80211_txb));
252 txb->nr_frags = nr_frags;
253 txb->frag_size = txb_size;
254
255 for (i = 0; i < nr_frags; i++) {
256 txb->fragments[i] = dev_alloc_skb(txb_size);
257 if (unlikely(!txb->fragments[i])) {
258 i--;
259 break;
260 }
261 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
262 }
263 if (unlikely(i != nr_frags)) {
264 while (i >= 0)
265 dev_kfree_skb_any(txb->fragments[i--]);
266 kfree(txb);
267 return NULL;
268 }
269 return txb;
270 }
271
272 // Classify the to-be send data packet
273 // Need to acquire the sent queue index.
274 static int
ieee80211_classify(struct sk_buff * skb,struct ieee80211_network * network)275 ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
276 {
277 struct ethhdr *eth;
278 struct iphdr *ip;
279 eth = (struct ethhdr *)skb->data;
280 if (eth->h_proto != htons(ETH_P_IP))
281 return 0;
282
283 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
284 ip = ip_hdr(skb);
285 switch (ip->tos & 0xfc) {
286 case 0x20:
287 return 2;
288 case 0x40:
289 return 1;
290 case 0x60:
291 return 3;
292 case 0x80:
293 return 4;
294 case 0xa0:
295 return 5;
296 case 0xc0:
297 return 6;
298 case 0xe0:
299 return 7;
300 default:
301 return 0;
302 }
303 }
304
305 #define SN_LESS(a, b) (((a-b)&0x800)!=0)
ieee80211_tx_query_agg_cap(struct ieee80211_device * ieee,struct sk_buff * skb,cb_desc * tcb_desc)306 void ieee80211_tx_query_agg_cap(struct ieee80211_device* ieee, struct sk_buff* skb, cb_desc* tcb_desc)
307 {
308 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
309 PTX_TS_RECORD pTxTs = NULL;
310 struct ieee80211_hdr_1addr* hdr = (struct ieee80211_hdr_1addr*)skb->data;
311
312 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
313 return;
314 if (!IsQoSDataFrame(skb->data))
315 return;
316
317 if (is_multicast_ether_addr(hdr->addr1))
318 return;
319 //check packet and mode later
320 #ifdef TO_DO_LIST
321 if(pTcb->PacketLength >= 4096)
322 return;
323 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
324 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
325 return;
326 #endif
327 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
328 {
329 return;
330 }
331 if(pHTInfo->bCurrentAMPDUEnable)
332 {
333 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
334 {
335 printk("===>can't get TS\n");
336 return;
337 }
338 if (pTxTs->TxAdmittedBARecord.bValid == false)
339 {
340 TsStartAddBaProcess(ieee, pTxTs);
341 goto FORCED_AGG_SETTING;
342 }
343 else if (pTxTs->bUsingBa == false)
344 {
345 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
346 pTxTs->bUsingBa = true;
347 else
348 goto FORCED_AGG_SETTING;
349 }
350
351 if (ieee->iw_mode == IW_MODE_INFRA)
352 {
353 tcb_desc->bAMPDUEnable = true;
354 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
355 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
356 }
357 }
358 FORCED_AGG_SETTING:
359 switch(pHTInfo->ForcedAMPDUMode )
360 {
361 case HT_AGG_AUTO:
362 break;
363
364 case HT_AGG_FORCE_ENABLE:
365 tcb_desc->bAMPDUEnable = true;
366 tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
367 tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
368 break;
369
370 case HT_AGG_FORCE_DISABLE:
371 tcb_desc->bAMPDUEnable = false;
372 tcb_desc->ampdu_density = 0;
373 tcb_desc->ampdu_factor = 0;
374 break;
375
376 }
377 return;
378 }
379
ieee80211_qurey_ShortPreambleMode(struct ieee80211_device * ieee,cb_desc * tcb_desc)380 extern void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device* ieee, cb_desc* tcb_desc)
381 {
382 tcb_desc->bUseShortPreamble = false;
383 if (tcb_desc->data_rate == 2)
384 {//// 1M can only use Long Preamble. 11B spec
385 return;
386 }
387 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
388 {
389 tcb_desc->bUseShortPreamble = true;
390 }
391 return;
392 }
393 extern void
ieee80211_query_HTCapShortGI(struct ieee80211_device * ieee,cb_desc * tcb_desc)394 ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, cb_desc *tcb_desc)
395 {
396 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
397
398 tcb_desc->bUseShortGI = false;
399
400 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
401 return;
402
403 if(pHTInfo->bForcedShortGI)
404 {
405 tcb_desc->bUseShortGI = true;
406 return;
407 }
408
409 if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz)
410 tcb_desc->bUseShortGI = true;
411 else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz)
412 tcb_desc->bUseShortGI = true;
413 }
414
ieee80211_query_BandwidthMode(struct ieee80211_device * ieee,cb_desc * tcb_desc)415 void ieee80211_query_BandwidthMode(struct ieee80211_device* ieee, cb_desc *tcb_desc)
416 {
417 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
418
419 tcb_desc->bPacketBW = false;
420
421 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
422 return;
423
424 if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
425 return;
426
427 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
428 return;
429 //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance
430 if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
431 tcb_desc->bPacketBW = true;
432 return;
433 }
434
ieee80211_query_protectionmode(struct ieee80211_device * ieee,cb_desc * tcb_desc,struct sk_buff * skb)435 void ieee80211_query_protectionmode(struct ieee80211_device* ieee, cb_desc* tcb_desc, struct sk_buff* skb)
436 {
437 // Common Settings
438 tcb_desc->bRTSSTBC = false;
439 tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used.
440 tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS
441 tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate.
442 tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz
443
444 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
445 return;
446
447 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
448 return;
449
450 if (ieee->mode < IEEE_N_24G) //b, g mode
451 {
452 // (1) RTS_Threshold is compared to the MPDU, not MSDU.
453 // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame.
454 // Other fragments are protected by previous fragment.
455 // So we only need to check the length of first fragment.
456 if (skb->len > ieee->rts)
457 {
458 tcb_desc->bRTSEnable = true;
459 tcb_desc->rts_rate = MGN_24M;
460 }
461 else if (ieee->current_network.buseprotection)
462 {
463 // Use CTS-to-SELF in protection mode.
464 tcb_desc->bRTSEnable = true;
465 tcb_desc->bCTSEnable = true;
466 tcb_desc->rts_rate = MGN_24M;
467 }
468 //otherwise return;
469 return;
470 }
471 else
472 {// 11n High throughput case.
473 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
474 while (true)
475 {
476 //check ERP protection
477 if (ieee->current_network.buseprotection)
478 {// CTS-to-SELF
479 tcb_desc->bRTSEnable = true;
480 tcb_desc->bCTSEnable = true;
481 tcb_desc->rts_rate = MGN_24M;
482 break;
483 }
484 //check HT op mode
485 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
486 {
487 u8 HTOpMode = pHTInfo->CurrentOpMode;
488 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
489 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
490 {
491 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
492 tcb_desc->bRTSEnable = true;
493 break;
494 }
495 }
496 //check rts
497 if (skb->len > ieee->rts)
498 {
499 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
500 tcb_desc->bRTSEnable = true;
501 break;
502 }
503 //to do list: check MIMO power save condition.
504 //check AMPDU aggregation for TXOP
505 if(tcb_desc->bAMPDUEnable)
506 {
507 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
508 // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads
509 // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily
510 tcb_desc->bRTSEnable = false;
511 break;
512 }
513 //check IOT action
514 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
515 {
516 tcb_desc->bCTSEnable = true;
517 tcb_desc->rts_rate = MGN_24M;
518 tcb_desc->bRTSEnable = true;
519 break;
520 }
521 // Totally no protection case!!
522 goto NO_PROTECTION;
523 }
524 }
525 // For test , CTS replace with RTS
526 if( 0 )
527 {
528 tcb_desc->bCTSEnable = true;
529 tcb_desc->rts_rate = MGN_24M;
530 tcb_desc->bRTSEnable = true;
531 }
532 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
533 tcb_desc->bUseShortPreamble = true;
534 if (ieee->mode == IW_MODE_MASTER)
535 goto NO_PROTECTION;
536 return;
537 NO_PROTECTION:
538 tcb_desc->bRTSEnable = false;
539 tcb_desc->bCTSEnable = false;
540 tcb_desc->rts_rate = 0;
541 tcb_desc->RTSSC = 0;
542 tcb_desc->bRTSBW = false;
543 }
544
545
ieee80211_txrate_selectmode(struct ieee80211_device * ieee,cb_desc * tcb_desc)546 void ieee80211_txrate_selectmode(struct ieee80211_device* ieee, cb_desc* tcb_desc)
547 {
548 #ifdef TO_DO_LIST
549 if(!IsDataFrame(pFrame))
550 {
551 pTcb->bTxDisableRateFallBack = TRUE;
552 pTcb->bTxUseDriverAssingedRate = TRUE;
553 pTcb->RATRIndex = 7;
554 return;
555 }
556
557 if(pMgntInfo->ForcedDataRate!= 0)
558 {
559 pTcb->bTxDisableRateFallBack = TRUE;
560 pTcb->bTxUseDriverAssingedRate = TRUE;
561 return;
562 }
563 #endif
564 if(ieee->bTxDisableRateFallBack)
565 tcb_desc->bTxDisableRateFallBack = true;
566
567 if(ieee->bTxUseDriverAssingedRate)
568 tcb_desc->bTxUseDriverAssingedRate = true;
569 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
570 {
571 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
572 tcb_desc->RATRIndex = 0;
573 }
574 }
575
ieee80211_query_seqnum(struct ieee80211_device * ieee,struct sk_buff * skb,u8 * dst)576 void ieee80211_query_seqnum(struct ieee80211_device*ieee, struct sk_buff* skb, u8* dst)
577 {
578 if (is_multicast_ether_addr(dst))
579 return;
580 if (IsQoSDataFrame(skb->data)) //we deal qos data only
581 {
582 PTX_TS_RECORD pTS = NULL;
583 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTS), dst, skb->priority, TX_DIR, true))
584 {
585 return;
586 }
587 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
588 }
589 }
590
ieee80211_xmit(struct sk_buff * skb,struct net_device * dev)591 int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
592 {
593 struct ieee80211_device *ieee = netdev_priv(dev);
594 struct ieee80211_txb *txb = NULL;
595 struct ieee80211_hdr_3addrqos *frag_hdr;
596 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
597 unsigned long flags;
598 struct net_device_stats *stats = &ieee->stats;
599 int ether_type = 0, encrypt;
600 int bytes, fc, qos_ctl = 0, hdr_len;
601 struct sk_buff *skb_frag;
602 struct ieee80211_hdr_3addrqos header = { /* Ensure zero initialized */
603 .duration_id = 0,
604 .seq_ctl = 0,
605 .qos_ctl = 0
606 };
607 u8 dest[ETH_ALEN], src[ETH_ALEN];
608 int qos_actived = ieee->current_network.qos_data.active;
609
610 struct ieee80211_crypt_data* crypt;
611
612 cb_desc *tcb_desc;
613
614 spin_lock_irqsave(&ieee->lock, flags);
615
616 /* If there is no driver handler to take the TXB, dont' bother
617 * creating it... */
618 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))||
619 ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
620 printk(KERN_WARNING "%s: No xmit handler.\n",
621 ieee->dev->name);
622 goto success;
623 }
624
625
626 if(likely(ieee->raw_tx == 0)){
627 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
628 printk(KERN_WARNING "%s: skb too small (%d).\n",
629 ieee->dev->name, skb->len);
630 goto success;
631 }
632
633 memset(skb->cb, 0, sizeof(skb->cb));
634 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
635
636 crypt = ieee->crypt[ieee->tx_keyidx];
637
638 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
639 ieee->host_encrypt && crypt && crypt->ops;
640
641 if (!encrypt && ieee->ieee802_1x &&
642 ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
643 stats->tx_dropped++;
644 goto success;
645 }
646 #ifdef CONFIG_IEEE80211_DEBUG
647 if (crypt && !encrypt && ether_type == ETH_P_PAE) {
648 struct eapol *eap = (struct eapol *)(skb->data +
649 sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16));
650 IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n",
651 eap_get_type(eap->type));
652 }
653 #endif
654
655 /* Save source and destination addresses */
656 memcpy(&dest, skb->data, ETH_ALEN);
657 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
658
659 /* Advance the SKB to the start of the payload */
660 skb_pull(skb, sizeof(struct ethhdr));
661
662 /* Determine total amount of storage required for TXB packets */
663 bytes = skb->len + SNAP_SIZE + sizeof(u16);
664
665 if (encrypt)
666 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
667 else
668
669 fc = IEEE80211_FTYPE_DATA;
670
671 //if(ieee->current_network.QoS_Enable)
672 if(qos_actived)
673 fc |= IEEE80211_STYPE_QOS_DATA;
674 else
675 fc |= IEEE80211_STYPE_DATA;
676
677 if (ieee->iw_mode == IW_MODE_INFRA) {
678 fc |= IEEE80211_FCTL_TODS;
679 /* To DS: Addr1 = BSSID, Addr2 = SA,
680 Addr3 = DA */
681 memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN);
682 memcpy(&header.addr2, &src, ETH_ALEN);
683 memcpy(&header.addr3, &dest, ETH_ALEN);
684 } else if (ieee->iw_mode == IW_MODE_ADHOC) {
685 /* not From/To DS: Addr1 = DA, Addr2 = SA,
686 Addr3 = BSSID */
687 memcpy(&header.addr1, dest, ETH_ALEN);
688 memcpy(&header.addr2, src, ETH_ALEN);
689 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
690 }
691
692 header.frame_ctl = cpu_to_le16(fc);
693
694 /* Determine fragmentation size based on destination (multicast
695 * and broadcast are not fragmented) */
696 if (is_multicast_ether_addr(header.addr1)) {
697 frag_size = MAX_FRAG_THRESHOLD;
698 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
699 }
700 else {
701 frag_size = ieee->fts;//default:392
702 qos_ctl = 0;
703 }
704
705 //if (ieee->current_network.QoS_Enable)
706 if(qos_actived)
707 {
708 hdr_len = IEEE80211_3ADDR_LEN + 2;
709
710 skb->priority = ieee80211_classify(skb, &ieee->current_network);
711 qos_ctl |= skb->priority; //set in the ieee80211_classify
712 header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID);
713 } else {
714 hdr_len = IEEE80211_3ADDR_LEN;
715 }
716 /* Determine amount of payload per fragment. Regardless of if
717 * this stack is providing the full 802.11 header, one will
718 * eventually be affixed to this fragment -- so we must account for
719 * it when determining the amount of payload space. */
720 bytes_per_frag = frag_size - hdr_len;
721 if (ieee->config &
722 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
723 bytes_per_frag -= IEEE80211_FCS_LEN;
724
725 /* Each fragment may need to have room for encryption pre/postfix */
726 if (encrypt)
727 bytes_per_frag -= crypt->ops->extra_prefix_len +
728 crypt->ops->extra_postfix_len;
729
730 /* Number of fragments is the total bytes_per_frag /
731 * payload_per_fragment */
732 nr_frags = bytes / bytes_per_frag;
733 bytes_last_frag = bytes % bytes_per_frag;
734 if (bytes_last_frag)
735 nr_frags++;
736 else
737 bytes_last_frag = bytes_per_frag;
738
739 /* When we allocate the TXB we allocate enough space for the reserve
740 * and full fragment bytes (bytes_per_frag doesn't include prefix,
741 * postfix, header, FCS, etc.) */
742 txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC);
743 if (unlikely(!txb)) {
744 printk(KERN_WARNING "%s: Could not allocate TXB\n",
745 ieee->dev->name);
746 goto failed;
747 }
748 txb->encrypted = encrypt;
749 txb->payload_size = bytes;
750
751 //if (ieee->current_network.QoS_Enable)
752 if(qos_actived)
753 {
754 txb->queue_index = UP2AC(skb->priority);
755 } else {
756 txb->queue_index = WME_AC_BK;
757 }
758
759
760
761 for (i = 0; i < nr_frags; i++) {
762 skb_frag = txb->fragments[i];
763 tcb_desc = (cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE);
764 if(qos_actived){
765 skb_frag->priority = skb->priority;//UP2AC(skb->priority);
766 tcb_desc->queue_index = UP2AC(skb->priority);
767 } else {
768 skb_frag->priority = WME_AC_BK;
769 tcb_desc->queue_index = WME_AC_BK;
770 }
771 skb_reserve(skb_frag, ieee->tx_headroom);
772
773 if (encrypt){
774 if (ieee->hwsec_active)
775 tcb_desc->bHwSec = 1;
776 else
777 tcb_desc->bHwSec = 0;
778 skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
779 }
780 else
781 {
782 tcb_desc->bHwSec = 0;
783 }
784 frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
785 memcpy(frag_hdr, &header, hdr_len);
786
787 /* If this is not the last fragment, then add the MOREFRAGS
788 * bit to the frame control */
789 if (i != nr_frags - 1) {
790 frag_hdr->frame_ctl = cpu_to_le16(
791 fc | IEEE80211_FCTL_MOREFRAGS);
792 bytes = bytes_per_frag;
793
794 } else {
795 /* The last fragment takes the remaining length */
796 bytes = bytes_last_frag;
797 }
798 //if(ieee->current_network.QoS_Enable)
799 if(qos_actived)
800 {
801 // add 1 only indicate to corresponding seq number control 2006/7/12
802 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i);
803 } else {
804 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
805 }
806
807 /* Put a SNAP header on the first fragment */
808 if (i == 0) {
809 ieee80211_put_snap(
810 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
811 ether_type);
812 bytes -= SNAP_SIZE + sizeof(u16);
813 }
814
815 memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
816
817 /* Advance the SKB... */
818 skb_pull(skb, bytes);
819
820 /* Encryption routine will move the header forward in order
821 * to insert the IV between the header and the payload */
822 if (encrypt)
823 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
824 if (ieee->config &
825 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
826 skb_put(skb_frag, 4);
827 }
828
829 if(qos_actived)
830 {
831 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
832 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
833 else
834 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
835 } else {
836 if (ieee->seq_ctrl[0] == 0xFFF)
837 ieee->seq_ctrl[0] = 0;
838 else
839 ieee->seq_ctrl[0]++;
840 }
841 }else{
842 if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) {
843 printk(KERN_WARNING "%s: skb too small (%d).\n",
844 ieee->dev->name, skb->len);
845 goto success;
846 }
847
848 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
849 if(!txb){
850 printk(KERN_WARNING "%s: Could not allocate TXB\n",
851 ieee->dev->name);
852 goto failed;
853 }
854
855 txb->encrypted = 0;
856 txb->payload_size = skb->len;
857 memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len);
858 }
859
860 success:
861 //WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
862 if (txb)
863 {
864 cb_desc *tcb_desc = (cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
865 tcb_desc->bTxEnableFwCalcDur = 1;
866 if (is_multicast_ether_addr(header.addr1))
867 tcb_desc->bMulticast = 1;
868 if (is_broadcast_ether_addr(header.addr1))
869 tcb_desc->bBroadcast = 1;
870 ieee80211_txrate_selectmode(ieee, tcb_desc);
871 if ( tcb_desc->bMulticast || tcb_desc->bBroadcast)
872 tcb_desc->data_rate = ieee->basic_rate;
873 else
874 //tcb_desc->data_rate = CURRENT_RATE(ieee->current_network.mode, ieee->rate, ieee->HTCurrentOperaRate);
875 tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate);
876 ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc);
877 ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc);
878 ieee80211_query_HTCapShortGI(ieee, tcb_desc);
879 ieee80211_query_BandwidthMode(ieee, tcb_desc);
880 ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]);
881 ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1);
882 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, txb->fragments[0]->data, txb->fragments[0]->len);
883 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, tcb_desc, sizeof(cb_desc));
884 }
885 spin_unlock_irqrestore(&ieee->lock, flags);
886 dev_kfree_skb_any(skb);
887 if (txb) {
888 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
889 ieee80211_softmac_xmit(txb, ieee);
890 }else{
891 if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
892 stats->tx_packets++;
893 stats->tx_bytes += txb->payload_size;
894 return 0;
895 }
896 ieee80211_txb_free(txb);
897 }
898 }
899
900 return 0;
901
902 failed:
903 spin_unlock_irqrestore(&ieee->lock, flags);
904 netif_stop_queue(dev);
905 stats->tx_errors++;
906 return 1;
907
908 }
909
910 EXPORT_SYMBOL(ieee80211_txb_free);
911