1 /******************************************************************************
3 Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
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.
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
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.
18 The full GNU General Public License is included in this distribution in the
22 James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 ******************************************************************************
27 Few modifications for Realtek's Wi-Fi drivers by
28 Andrea Merello <andrea.merello@gmail.com>
30 A special thanks goes to Realtek for their support !
32 ******************************************************************************/
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>
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>
55 #include "ieee80211.h"
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 '-----------------------------------------------------------------------------------------'
76 ,--------- 'ctrl' expands to >-----------'
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 `----.----'
86 .- 'Frame data' expands to <---------------------------'
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 `----.----'
98 .- 'IP Packet' expands, if WEP enabled, to <--'
101 ,-----------------------.
102 Bytes | 4 | 0-2296 | 4 |
103 |-----|-----------|-----|
104 Desc. | IV | Encrypted | ICV |
106 `-----------------------'
107 Total: 8 non-data bytes
110 802.3 Ethernet Data Frame
112 ,-----------------------------------------.
113 Bytes | 6 | 6 | 2 | Variable | 4 |
114 |-------|-------|------|-----------|------|
115 Desc. | Dest. | Source| Type | IP Packet | fcs |
117 `-----------------------------------------'
118 Total: 18 non-data bytes
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.
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.
134 * | ETHERNET HEADER ,-<-- PAYLOAD
135 * | | 14 bytes from skb->data
136 * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
138 * |,-Dest.--. ,--Src.---. | | |
139 * | 6 bytes| | 6 bytes | | | |
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
145 * | | | | `T' <---- 2 bytes for Type
147 * | | '---SNAP--' <-------- 6 bytes for SNAP
149 * `-IV--' <-------------------- 4 bytes for IV (WEP)
155 static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
156 static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
158 static inline int ieee80211_put_snap(u8 *data, u16 h_proto)
160 struct ieee80211_snap_hdr *snap;
163 snap = (struct ieee80211_snap_hdr *)data;
168 if (h_proto == 0x8137 || h_proto == 0x80f3)
172 snap->oui[0] = oui[0];
173 snap->oui[1] = oui[1];
174 snap->oui[2] = oui[2];
176 *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
178 return SNAP_SIZE + sizeof(u16);
181 int ieee80211_encrypt_fragment(
182 struct ieee80211_device *ieee,
183 struct sk_buff *frag,
186 struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx];
189 if (!(crypt && crypt->ops))
191 printk("=========>%s(), crypt is null\n", __func__);
194 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
195 struct ieee80211_hdr *header;
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);
208 /* To encrypt, frame format is:
209 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */
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);
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);
221 atomic_dec(&crypt->refcnt);
223 printk(KERN_INFO "%s: Encryption failed: len=%d.\n",
224 ieee->dev->name, frag->len);
225 ieee->ieee_stats.tx_discards++;
233 void ieee80211_txb_free(struct ieee80211_txb *txb) {
239 EXPORT_SYMBOL(ieee80211_txb_free);
241 static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
244 struct ieee80211_txb *txb;
247 sizeof(struct ieee80211_txb) + (sizeof(u8 *) * nr_frags),
252 memset(txb, 0, sizeof(struct ieee80211_txb));
253 txb->nr_frags = nr_frags;
254 txb->frag_size = txb_size;
256 for (i = 0; i < nr_frags; i++) {
257 txb->fragments[i] = dev_alloc_skb(txb_size);
258 if (unlikely(!txb->fragments[i])) {
262 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
264 if (unlikely(i != nr_frags)) {
266 dev_kfree_skb_any(txb->fragments[i--]);
273 // Classify the to-be send data packet
274 // Need to acquire the sent queue index.
276 ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
280 eth = (struct ethhdr *)skb->data;
281 if (eth->h_proto != htons(ETH_P_IP))
284 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
286 switch (ip->tos & 0xfc) {
306 #define SN_LESS(a, b) (((a-b)&0x800)!=0)
307 static void ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee,
308 struct sk_buff *skb, cb_desc *tcb_desc)
310 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
311 PTX_TS_RECORD pTxTs = NULL;
312 struct ieee80211_hdr_1addr *hdr = (struct ieee80211_hdr_1addr *)skb->data;
314 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
316 if (!IsQoSDataFrame(skb->data))
319 if (is_multicast_ether_addr(hdr->addr1))
321 //check packet and mode later
323 if(pTcb->PacketLength >= 4096)
325 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
326 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
329 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
333 if(pHTInfo->bCurrentAMPDUEnable)
335 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
337 printk("===>can't get TS\n");
340 if (pTxTs->TxAdmittedBARecord.bValid == false)
342 TsStartAddBaProcess(ieee, pTxTs);
343 goto FORCED_AGG_SETTING;
345 else if (pTxTs->bUsingBa == false)
347 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
348 pTxTs->bUsingBa = true;
350 goto FORCED_AGG_SETTING;
353 if (ieee->iw_mode == IW_MODE_INFRA)
355 tcb_desc->bAMPDUEnable = true;
356 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
357 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
361 switch (pHTInfo->ForcedAMPDUMode )
366 case HT_AGG_FORCE_ENABLE:
367 tcb_desc->bAMPDUEnable = true;
368 tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
369 tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
372 case HT_AGG_FORCE_DISABLE:
373 tcb_desc->bAMPDUEnable = false;
374 tcb_desc->ampdu_density = 0;
375 tcb_desc->ampdu_factor = 0;
382 static void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device *ieee,
385 tcb_desc->bUseShortPreamble = false;
386 if (tcb_desc->data_rate == 2)
387 {//// 1M can only use Long Preamble. 11B spec
390 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
392 tcb_desc->bUseShortPreamble = true;
397 ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, cb_desc *tcb_desc)
399 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
401 tcb_desc->bUseShortGI = false;
403 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
406 if(pHTInfo->bForcedShortGI)
408 tcb_desc->bUseShortGI = true;
412 if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz)
413 tcb_desc->bUseShortGI = true;
414 else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz)
415 tcb_desc->bUseShortGI = true;
418 static void ieee80211_query_BandwidthMode(struct ieee80211_device *ieee,
421 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
423 tcb_desc->bPacketBW = false;
425 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
428 if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
431 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
433 //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance
434 if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
435 tcb_desc->bPacketBW = true;
439 static void ieee80211_query_protectionmode(struct ieee80211_device *ieee,
444 tcb_desc->bRTSSTBC = false;
445 tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used.
446 tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS
447 tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate.
448 tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz
450 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
453 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
456 if (ieee->mode < IEEE_N_24G) //b, g mode
458 // (1) RTS_Threshold is compared to the MPDU, not MSDU.
459 // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame.
460 // Other fragments are protected by previous fragment.
461 // So we only need to check the length of first fragment.
462 if (skb->len > ieee->rts)
464 tcb_desc->bRTSEnable = true;
465 tcb_desc->rts_rate = MGN_24M;
467 else if (ieee->current_network.buseprotection)
469 // Use CTS-to-SELF in protection mode.
470 tcb_desc->bRTSEnable = true;
471 tcb_desc->bCTSEnable = true;
472 tcb_desc->rts_rate = MGN_24M;
478 {// 11n High throughput case.
479 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
482 //check ERP protection
483 if (ieee->current_network.buseprotection)
485 tcb_desc->bRTSEnable = true;
486 tcb_desc->bCTSEnable = true;
487 tcb_desc->rts_rate = MGN_24M;
491 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
493 u8 HTOpMode = pHTInfo->CurrentOpMode;
494 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
495 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
497 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
498 tcb_desc->bRTSEnable = true;
503 if (skb->len > ieee->rts)
505 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
506 tcb_desc->bRTSEnable = true;
509 //to do list: check MIMO power save condition.
510 //check AMPDU aggregation for TXOP
511 if(tcb_desc->bAMPDUEnable)
513 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
514 // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads
515 // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily
516 tcb_desc->bRTSEnable = false;
520 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
522 tcb_desc->bCTSEnable = true;
523 tcb_desc->rts_rate = MGN_24M;
524 tcb_desc->bRTSEnable = true;
527 // Totally no protection case!!
531 // For test , CTS replace with RTS
534 tcb_desc->bCTSEnable = true;
535 tcb_desc->rts_rate = MGN_24M;
536 tcb_desc->bRTSEnable = true;
538 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
539 tcb_desc->bUseShortPreamble = true;
540 if (ieee->mode == IW_MODE_MASTER)
544 tcb_desc->bRTSEnable = false;
545 tcb_desc->bCTSEnable = false;
546 tcb_desc->rts_rate = 0;
548 tcb_desc->bRTSBW = false;
552 static void ieee80211_txrate_selectmode(struct ieee80211_device *ieee,
556 if(!IsDataFrame(pFrame))
558 pTcb->bTxDisableRateFallBack = TRUE;
559 pTcb->bTxUseDriverAssingedRate = TRUE;
564 if(pMgntInfo->ForcedDataRate!= 0)
566 pTcb->bTxDisableRateFallBack = TRUE;
567 pTcb->bTxUseDriverAssingedRate = TRUE;
571 if(ieee->bTxDisableRateFallBack)
572 tcb_desc->bTxDisableRateFallBack = true;
574 if(ieee->bTxUseDriverAssingedRate)
575 tcb_desc->bTxUseDriverAssingedRate = true;
576 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
578 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
579 tcb_desc->RATRIndex = 0;
583 static void ieee80211_query_seqnum(struct ieee80211_device *ieee,
584 struct sk_buff *skb, u8 *dst)
586 if (is_multicast_ether_addr(dst))
588 if (IsQoSDataFrame(skb->data)) //we deal qos data only
590 PTX_TS_RECORD pTS = NULL;
591 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTS), dst, skb->priority, TX_DIR, true))
595 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
599 int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
601 struct ieee80211_device *ieee = netdev_priv(dev);
602 struct ieee80211_txb *txb = NULL;
603 struct ieee80211_hdr_3addrqos *frag_hdr;
604 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
606 struct net_device_stats *stats = &ieee->stats;
607 int ether_type = 0, encrypt;
608 int bytes, fc, qos_ctl = 0, hdr_len;
609 struct sk_buff *skb_frag;
610 struct ieee80211_hdr_3addrqos header = { /* Ensure zero initialized */
615 u8 dest[ETH_ALEN], src[ETH_ALEN];
616 int qos_actived = ieee->current_network.qos_data.active;
618 struct ieee80211_crypt_data *crypt;
622 spin_lock_irqsave(&ieee->lock, flags);
624 /* If there is no driver handler to take the TXB, dont' bother
626 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))||
627 ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
628 printk(KERN_WARNING "%s: No xmit handler.\n",
634 if(likely(ieee->raw_tx == 0)){
635 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
636 printk(KERN_WARNING "%s: skb too small (%d).\n",
637 ieee->dev->name, skb->len);
641 memset(skb->cb, 0, sizeof(skb->cb));
642 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
644 crypt = ieee->crypt[ieee->tx_keyidx];
646 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
647 ieee->host_encrypt && crypt && crypt->ops;
649 if (!encrypt && ieee->ieee802_1x &&
650 ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
654 #ifdef CONFIG_IEEE80211_DEBUG
655 if (crypt && !encrypt && ether_type == ETH_P_PAE) {
656 struct eapol *eap = (struct eapol *)(skb->data +
657 sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16));
658 IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n",
659 eap_get_type(eap->type));
663 /* Save source and destination addresses */
664 memcpy(&dest, skb->data, ETH_ALEN);
665 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
667 /* Advance the SKB to the start of the payload */
668 skb_pull(skb, sizeof(struct ethhdr));
670 /* Determine total amount of storage required for TXB packets */
671 bytes = skb->len + SNAP_SIZE + sizeof(u16);
674 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
677 fc = IEEE80211_FTYPE_DATA;
679 //if(ieee->current_network.QoS_Enable)
681 fc |= IEEE80211_STYPE_QOS_DATA;
683 fc |= IEEE80211_STYPE_DATA;
685 if (ieee->iw_mode == IW_MODE_INFRA) {
686 fc |= IEEE80211_FCTL_TODS;
687 /* To DS: Addr1 = BSSID, Addr2 = SA,
689 memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN);
690 memcpy(&header.addr2, &src, ETH_ALEN);
691 memcpy(&header.addr3, &dest, ETH_ALEN);
692 } else if (ieee->iw_mode == IW_MODE_ADHOC) {
693 /* not From/To DS: Addr1 = DA, Addr2 = SA,
695 memcpy(&header.addr1, dest, ETH_ALEN);
696 memcpy(&header.addr2, src, ETH_ALEN);
697 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
700 header.frame_ctl = cpu_to_le16(fc);
702 /* Determine fragmentation size based on destination (multicast
703 * and broadcast are not fragmented) */
704 if (is_multicast_ether_addr(header.addr1)) {
705 frag_size = MAX_FRAG_THRESHOLD;
706 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
709 frag_size = ieee->fts;//default:392
713 //if (ieee->current_network.QoS_Enable)
716 hdr_len = IEEE80211_3ADDR_LEN + 2;
718 skb->priority = ieee80211_classify(skb, &ieee->current_network);
719 qos_ctl |= skb->priority; //set in the ieee80211_classify
720 header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID);
722 hdr_len = IEEE80211_3ADDR_LEN;
724 /* Determine amount of payload per fragment. Regardless of if
725 * this stack is providing the full 802.11 header, one will
726 * eventually be affixed to this fragment -- so we must account for
727 * it when determining the amount of payload space. */
728 bytes_per_frag = frag_size - hdr_len;
730 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
731 bytes_per_frag -= IEEE80211_FCS_LEN;
733 /* Each fragment may need to have room for encryption pre/postfix */
735 bytes_per_frag -= crypt->ops->extra_prefix_len +
736 crypt->ops->extra_postfix_len;
738 /* Number of fragments is the total bytes_per_frag /
739 * payload_per_fragment */
740 nr_frags = bytes / bytes_per_frag;
741 bytes_last_frag = bytes % bytes_per_frag;
745 bytes_last_frag = bytes_per_frag;
747 /* When we allocate the TXB we allocate enough space for the reserve
748 * and full fragment bytes (bytes_per_frag doesn't include prefix,
749 * postfix, header, FCS, etc.) */
750 txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC);
751 if (unlikely(!txb)) {
752 printk(KERN_WARNING "%s: Could not allocate TXB\n",
756 txb->encrypted = encrypt;
757 txb->payload_size = bytes;
759 //if (ieee->current_network.QoS_Enable)
762 txb->queue_index = UP2AC(skb->priority);
764 txb->queue_index = WME_AC_BK;
769 for (i = 0; i < nr_frags; i++) {
770 skb_frag = txb->fragments[i];
771 tcb_desc = (cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE);
773 skb_frag->priority = skb->priority;//UP2AC(skb->priority);
774 tcb_desc->queue_index = UP2AC(skb->priority);
776 skb_frag->priority = WME_AC_BK;
777 tcb_desc->queue_index = WME_AC_BK;
779 skb_reserve(skb_frag, ieee->tx_headroom);
782 if (ieee->hwsec_active)
783 tcb_desc->bHwSec = 1;
785 tcb_desc->bHwSec = 0;
786 skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
790 tcb_desc->bHwSec = 0;
792 frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
793 memcpy(frag_hdr, &header, hdr_len);
795 /* If this is not the last fragment, then add the MOREFRAGS
796 * bit to the frame control */
797 if (i != nr_frags - 1) {
798 frag_hdr->frame_ctl = cpu_to_le16(
799 fc | IEEE80211_FCTL_MOREFRAGS);
800 bytes = bytes_per_frag;
803 /* The last fragment takes the remaining length */
804 bytes = bytes_last_frag;
806 //if(ieee->current_network.QoS_Enable)
809 // add 1 only indicate to corresponding seq number control 2006/7/12
810 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i);
812 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
815 /* Put a SNAP header on the first fragment */
818 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
820 bytes -= SNAP_SIZE + sizeof(u16);
823 memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
825 /* Advance the SKB... */
826 skb_pull(skb, bytes);
828 /* Encryption routine will move the header forward in order
829 * to insert the IV between the header and the payload */
831 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
833 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
834 skb_put(skb_frag, 4);
839 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
840 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
842 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
844 if (ieee->seq_ctrl[0] == 0xFFF)
845 ieee->seq_ctrl[0] = 0;
850 if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) {
851 printk(KERN_WARNING "%s: skb too small (%d).\n",
852 ieee->dev->name, skb->len);
856 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
858 printk(KERN_WARNING "%s: Could not allocate TXB\n",
864 txb->payload_size = skb->len;
865 memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len);
869 //WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
872 cb_desc *tcb_desc = (cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
873 tcb_desc->bTxEnableFwCalcDur = 1;
874 if (is_multicast_ether_addr(header.addr1))
875 tcb_desc->bMulticast = 1;
876 if (is_broadcast_ether_addr(header.addr1))
877 tcb_desc->bBroadcast = 1;
878 ieee80211_txrate_selectmode(ieee, tcb_desc);
879 if ( tcb_desc->bMulticast || tcb_desc->bBroadcast)
880 tcb_desc->data_rate = ieee->basic_rate;
882 //tcb_desc->data_rate = CURRENT_RATE(ieee->current_network.mode, ieee->rate, ieee->HTCurrentOperaRate);
883 tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate);
884 ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc);
885 ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc);
886 ieee80211_query_HTCapShortGI(ieee, tcb_desc);
887 ieee80211_query_BandwidthMode(ieee, tcb_desc);
888 ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]);
889 ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1);
890 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, txb->fragments[0]->data, txb->fragments[0]->len);
891 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, tcb_desc, sizeof(cb_desc));
893 spin_unlock_irqrestore(&ieee->lock, flags);
894 dev_kfree_skb_any(skb);
896 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
897 ieee80211_softmac_xmit(txb, ieee);
899 if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
901 stats->tx_bytes += txb->payload_size;
904 ieee80211_txb_free(txb);
911 spin_unlock_irqrestore(&ieee->lock, flags);
912 netif_stop_queue(dev);