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 <andreamrl@tiscali.it>
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", __FUNCTION__);
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) {
240 struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
243 struct ieee80211_txb *txb;
246 sizeof(struct ieee80211_txb) + (sizeof(u8 *) * nr_frags),
251 memset(txb, 0, sizeof(struct ieee80211_txb));
252 txb->nr_frags = nr_frags;
253 txb->frag_size = txb_size;
255 for (i = 0; i < nr_frags; i++) {
256 txb->fragments[i] = dev_alloc_skb(txb_size);
257 if (unlikely(!txb->fragments[i])) {
261 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
263 if (unlikely(i != nr_frags)) {
265 dev_kfree_skb_any(txb->fragments[i--]);
272 // Classify the to-be send data packet
273 // Need to acquire the sent queue index.
275 ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
279 eth = (struct ethhdr *)skb->data;
280 if (eth->h_proto != htons(ETH_P_IP))
283 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
285 switch (ip->tos & 0xfc) {
305 #define SN_LESS(a, b) (((a-b)&0x800)!=0)
306 void ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee, struct sk_buff *skb, cb_desc *tcb_desc)
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;
312 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
314 if (!IsQoSDataFrame(skb->data))
317 if (is_multicast_ether_addr(hdr->addr1))
319 //check packet and mode later
321 if(pTcb->PacketLength >= 4096)
323 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
324 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
327 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
331 if(pHTInfo->bCurrentAMPDUEnable)
333 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
335 printk("===>can't get TS\n");
338 if (pTxTs->TxAdmittedBARecord.bValid == false)
340 TsStartAddBaProcess(ieee, pTxTs);
341 goto FORCED_AGG_SETTING;
343 else if (pTxTs->bUsingBa == false)
345 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
346 pTxTs->bUsingBa = true;
348 goto FORCED_AGG_SETTING;
351 if (ieee->iw_mode == IW_MODE_INFRA)
353 tcb_desc->bAMPDUEnable = true;
354 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
355 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
359 switch (pHTInfo->ForcedAMPDUMode )
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;
370 case HT_AGG_FORCE_DISABLE:
371 tcb_desc->bAMPDUEnable = false;
372 tcb_desc->ampdu_density = 0;
373 tcb_desc->ampdu_factor = 0;
380 extern void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device *ieee, cb_desc *tcb_desc)
382 tcb_desc->bUseShortPreamble = false;
383 if (tcb_desc->data_rate == 2)
384 {//// 1M can only use Long Preamble. 11B spec
387 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
389 tcb_desc->bUseShortPreamble = true;
394 ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, cb_desc *tcb_desc)
396 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
398 tcb_desc->bUseShortGI = false;
400 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
403 if(pHTInfo->bForcedShortGI)
405 tcb_desc->bUseShortGI = true;
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;
415 void ieee80211_query_BandwidthMode(struct ieee80211_device *ieee, cb_desc *tcb_desc)
417 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
419 tcb_desc->bPacketBW = false;
421 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
424 if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
427 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
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;
435 void ieee80211_query_protectionmode(struct ieee80211_device *ieee, cb_desc *tcb_desc, struct sk_buff *skb)
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
444 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
447 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
450 if (ieee->mode < IEEE_N_24G) //b, g mode
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)
458 tcb_desc->bRTSEnable = true;
459 tcb_desc->rts_rate = MGN_24M;
461 else if (ieee->current_network.buseprotection)
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;
472 {// 11n High throughput case.
473 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
476 //check ERP protection
477 if (ieee->current_network.buseprotection)
479 tcb_desc->bRTSEnable = true;
480 tcb_desc->bCTSEnable = true;
481 tcb_desc->rts_rate = MGN_24M;
485 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
487 u8 HTOpMode = pHTInfo->CurrentOpMode;
488 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
489 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
491 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
492 tcb_desc->bRTSEnable = true;
497 if (skb->len > ieee->rts)
499 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
500 tcb_desc->bRTSEnable = true;
503 //to do list: check MIMO power save condition.
504 //check AMPDU aggregation for TXOP
505 if(tcb_desc->bAMPDUEnable)
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;
514 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
516 tcb_desc->bCTSEnable = true;
517 tcb_desc->rts_rate = MGN_24M;
518 tcb_desc->bRTSEnable = true;
521 // Totally no protection case!!
525 // For test , CTS replace with RTS
528 tcb_desc->bCTSEnable = true;
529 tcb_desc->rts_rate = MGN_24M;
530 tcb_desc->bRTSEnable = true;
532 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
533 tcb_desc->bUseShortPreamble = true;
534 if (ieee->mode == IW_MODE_MASTER)
538 tcb_desc->bRTSEnable = false;
539 tcb_desc->bCTSEnable = false;
540 tcb_desc->rts_rate = 0;
542 tcb_desc->bRTSBW = false;
546 void ieee80211_txrate_selectmode(struct ieee80211_device *ieee, cb_desc *tcb_desc)
549 if(!IsDataFrame(pFrame))
551 pTcb->bTxDisableRateFallBack = TRUE;
552 pTcb->bTxUseDriverAssingedRate = TRUE;
557 if(pMgntInfo->ForcedDataRate!= 0)
559 pTcb->bTxDisableRateFallBack = TRUE;
560 pTcb->bTxUseDriverAssingedRate = TRUE;
564 if(ieee->bTxDisableRateFallBack)
565 tcb_desc->bTxDisableRateFallBack = true;
567 if(ieee->bTxUseDriverAssingedRate)
568 tcb_desc->bTxUseDriverAssingedRate = true;
569 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
571 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
572 tcb_desc->RATRIndex = 0;
576 void ieee80211_query_seqnum(struct ieee80211_device *ieee, struct sk_buff *skb, u8 *dst)
578 if (is_multicast_ether_addr(dst))
580 if (IsQoSDataFrame(skb->data)) //we deal qos data only
582 PTX_TS_RECORD pTS = NULL;
583 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTS), dst, skb->priority, TX_DIR, true))
587 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
591 int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
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;
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 */
607 u8 dest[ETH_ALEN], src[ETH_ALEN];
608 int qos_actived = ieee->current_network.qos_data.active;
610 struct ieee80211_crypt_data *crypt;
614 spin_lock_irqsave(&ieee->lock, flags);
616 /* If there is no driver handler to take the TXB, dont' bother
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",
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);
633 memset(skb->cb, 0, sizeof(skb->cb));
634 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
636 crypt = ieee->crypt[ieee->tx_keyidx];
638 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
639 ieee->host_encrypt && crypt && crypt->ops;
641 if (!encrypt && ieee->ieee802_1x &&
642 ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
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));
655 /* Save source and destination addresses */
656 memcpy(&dest, skb->data, ETH_ALEN);
657 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
659 /* Advance the SKB to the start of the payload */
660 skb_pull(skb, sizeof(struct ethhdr));
662 /* Determine total amount of storage required for TXB packets */
663 bytes = skb->len + SNAP_SIZE + sizeof(u16);
666 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
669 fc = IEEE80211_FTYPE_DATA;
671 //if(ieee->current_network.QoS_Enable)
673 fc |= IEEE80211_STYPE_QOS_DATA;
675 fc |= IEEE80211_STYPE_DATA;
677 if (ieee->iw_mode == IW_MODE_INFRA) {
678 fc |= IEEE80211_FCTL_TODS;
679 /* To DS: Addr1 = BSSID, Addr2 = SA,
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,
687 memcpy(&header.addr1, dest, ETH_ALEN);
688 memcpy(&header.addr2, src, ETH_ALEN);
689 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
692 header.frame_ctl = cpu_to_le16(fc);
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;
701 frag_size = ieee->fts;//default:392
705 //if (ieee->current_network.QoS_Enable)
708 hdr_len = IEEE80211_3ADDR_LEN + 2;
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);
714 hdr_len = IEEE80211_3ADDR_LEN;
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;
722 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
723 bytes_per_frag -= IEEE80211_FCS_LEN;
725 /* Each fragment may need to have room for encryption pre/postfix */
727 bytes_per_frag -= crypt->ops->extra_prefix_len +
728 crypt->ops->extra_postfix_len;
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;
737 bytes_last_frag = bytes_per_frag;
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",
748 txb->encrypted = encrypt;
749 txb->payload_size = bytes;
751 //if (ieee->current_network.QoS_Enable)
754 txb->queue_index = UP2AC(skb->priority);
756 txb->queue_index = WME_AC_BK;
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);
765 skb_frag->priority = skb->priority;//UP2AC(skb->priority);
766 tcb_desc->queue_index = UP2AC(skb->priority);
768 skb_frag->priority = WME_AC_BK;
769 tcb_desc->queue_index = WME_AC_BK;
771 skb_reserve(skb_frag, ieee->tx_headroom);
774 if (ieee->hwsec_active)
775 tcb_desc->bHwSec = 1;
777 tcb_desc->bHwSec = 0;
778 skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
782 tcb_desc->bHwSec = 0;
784 frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
785 memcpy(frag_hdr, &header, hdr_len);
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;
795 /* The last fragment takes the remaining length */
796 bytes = bytes_last_frag;
798 //if(ieee->current_network.QoS_Enable)
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);
804 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
807 /* Put a SNAP header on the first fragment */
810 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
812 bytes -= SNAP_SIZE + sizeof(u16);
815 memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
817 /* Advance the SKB... */
818 skb_pull(skb, bytes);
820 /* Encryption routine will move the header forward in order
821 * to insert the IV between the header and the payload */
823 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
825 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
826 skb_put(skb_frag, 4);
831 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
832 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
834 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
836 if (ieee->seq_ctrl[0] == 0xFFF)
837 ieee->seq_ctrl[0] = 0;
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);
848 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
850 printk(KERN_WARNING "%s: Could not allocate TXB\n",
856 txb->payload_size = skb->len;
857 memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len);
861 //WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
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;
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));
885 spin_unlock_irqrestore(&ieee->lock, flags);
886 dev_kfree_skb_any(skb);
888 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
889 ieee80211_softmac_xmit(txb, ieee);
891 if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
893 stats->tx_bytes += txb->payload_size;
896 ieee80211_txb_free(txb);
903 spin_unlock_irqrestore(&ieee->lock, flags);
904 netif_stop_queue(dev);
910 EXPORT_SYMBOL(ieee80211_txb_free);