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
19 * file called LICENSE.
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
26 * Few modifications for Realtek's Wi-Fi drivers by
27 * Andrea Merello <andrea.merello@gmail.com>
29 * A special thanks goes to Realtek for their support !
31 ******************************************************************************/
33 #include <linux/compiler.h>
34 #include <linux/errno.h>
35 #include <linux/if_arp.h>
36 #include <linux/in6.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/netdevice.h>
42 #include <linux/pci.h>
43 #include <linux/proc_fs.h>
44 #include <linux/skbuff.h>
45 #include <linux/slab.h>
46 #include <linux/tcp.h>
47 #include <linux/types.h>
48 #include <linux/wireless.h>
49 #include <linux/etherdevice.h>
50 #include <linux/uaccess.h>
51 #include <linux/if_vlan.h>
53 #include "ieee80211.h"
62 * 802.11 frame_contorl for data frames - 2 bytes
63 * ,-----------------------------------------------------------------------------------------.
64 * bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
65 * |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
66 * val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
67 * |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
68 * desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep |
69 * | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | |
70 * '-----------------------------------------------------------------------------------------'
74 * ,--------- 'ctrl' expands to >-----------'
76 * ,--'---,-------------------------------------------------------------.
77 * Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
78 * |------|------|---------|---------|---------|------|---------|------|
79 * Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
80 * | | tion | (BSSID) | | | ence | data | |
81 * `--------------------------------------------------| |------'
82 * Total: 28 non-data bytes `----.----'
84 * .- 'Frame data' expands to <---------------------------'
87 * ,---------------------------------------------------.
88 * Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
89 * |------|------|---------|----------|------|---------|
90 * Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
91 * | DSAP | SSAP | | | | Packet |
92 * | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
93 * `-----------------------------------------| |
94 * Total: 8 non-data bytes `----.----'
96 * .- 'IP Packet' expands, if WEP enabled, to <--'
99 * ,-----------------------.
100 * Bytes | 4 | 0-2296 | 4 |
101 * |-----|-----------|-----|
102 * Desc. | IV | Encrypted | ICV |
104 * `-----------------------'
105 * Total: 8 non-data bytes
108 * 802.3 Ethernet Data Frame
110 * ,-----------------------------------------.
111 * Bytes | 6 | 6 | 2 | Variable | 4 |
112 * |-------|-------|------|-----------|------|
113 * Desc. | Dest. | Source| Type | IP Packet | fcs |
114 * | MAC | MAC | | | |
115 * `-----------------------------------------'
116 * Total: 18 non-data bytes
118 * In the event that fragmentation is required, the incoming payload is split into
119 * N parts of size ieee->fts. The first fragment contains the SNAP header and the
120 * remaining packets are just data.
122 * If encryption is enabled, each fragment payload size is reduced by enough space
123 * to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
124 * So if you have 1500 bytes of payload with ieee->fts set to 500 without
125 * encryption it will take 3 frames. With WEP it will take 4 frames as the
126 * payload of each frame is reduced to 492 bytes.
132 * | ETHERNET HEADER ,-<-- PAYLOAD
133 * | | 14 bytes from skb->data
134 * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
136 * |,-Dest.--. ,--Src.---. | | |
137 * | 6 bytes| | 6 bytes | | | |
140 * 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 * | | | | `T' <---- 2 bytes for Type
145 * | | '---SNAP--' <-------- 6 bytes for SNAP
147 * `-IV--' <-------------------- 4 bytes for IV (WEP)
153 static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
154 static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
156 static inline int ieee80211_put_snap(u8 *data, u16 h_proto)
158 struct ieee80211_snap_hdr *snap;
161 snap = (struct ieee80211_snap_hdr *)data;
166 if (h_proto == 0x8137 || h_proto == 0x80f3)
170 snap->oui[0] = oui[0];
171 snap->oui[1] = oui[1];
172 snap->oui[2] = oui[2];
174 *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
176 return SNAP_SIZE + sizeof(u16);
179 int ieee80211_encrypt_fragment(
180 struct ieee80211_device *ieee,
181 struct sk_buff *frag,
184 struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx];
187 if (!(crypt && crypt->ops))
189 printk("=========>%s(), crypt is null\n", __func__);
193 if (ieee->tkip_countermeasures &&
194 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
195 if (net_ratelimit()) {
196 struct rtl_80211_hdr_3addrqos *header;
198 header = (struct rtl_80211_hdr_3addrqos *)frag->data;
199 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
200 "TX packet to %pM\n",
201 ieee->dev->name, header->addr1);
206 /* To encrypt, frame format is:
207 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes)
210 // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption.
211 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
212 * 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 = __cpu_to_le16(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))
285 switch (ip->tos & 0xfc) {
305 #define SN_LESS(a, b) (((a-b)&0x800)!=0)
306 static void ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee,
307 struct sk_buff *skb, struct cb_desc *tcb_desc)
309 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
310 PTX_TS_RECORD pTxTs = NULL;
311 struct rtl_80211_hdr_1addr *hdr = (struct rtl_80211_hdr_1addr *)skb->data;
313 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
315 if (!IsQoSDataFrame(skb->data))
318 if (is_multicast_ether_addr(hdr->addr1))
320 //check packet and mode later
322 if(pTcb->PacketLength >= 4096)
324 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
325 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
328 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
332 if(pHTInfo->bCurrentAMPDUEnable)
334 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
336 printk("===>can't get TS\n");
339 if (!pTxTs->TxAdmittedBARecord.bValid)
341 TsStartAddBaProcess(ieee, pTxTs);
342 goto FORCED_AGG_SETTING;
344 else if (!pTxTs->bUsingBa)
346 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
347 pTxTs->bUsingBa = true;
349 goto FORCED_AGG_SETTING;
352 if (ieee->iw_mode == IW_MODE_INFRA)
354 tcb_desc->bAMPDUEnable = true;
355 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
356 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
360 switch (pHTInfo->ForcedAMPDUMode )
365 case HT_AGG_FORCE_ENABLE:
366 tcb_desc->bAMPDUEnable = true;
367 tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
368 tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
371 case HT_AGG_FORCE_DISABLE:
372 tcb_desc->bAMPDUEnable = false;
373 tcb_desc->ampdu_density = 0;
374 tcb_desc->ampdu_factor = 0;
381 static void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device *ieee,
382 struct cb_desc *tcb_desc)
384 tcb_desc->bUseShortPreamble = false;
385 if (tcb_desc->data_rate == 2)
386 {//// 1M can only use Long Preamble. 11B spec
389 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
391 tcb_desc->bUseShortPreamble = true;
396 ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, struct cb_desc *tcb_desc)
398 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
400 tcb_desc->bUseShortGI = false;
402 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
405 if(pHTInfo->bForcedShortGI)
407 tcb_desc->bUseShortGI = true;
411 if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz)
412 tcb_desc->bUseShortGI = true;
413 else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz)
414 tcb_desc->bUseShortGI = true;
417 static void ieee80211_query_BandwidthMode(struct ieee80211_device *ieee,
418 struct cb_desc *tcb_desc)
420 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
422 tcb_desc->bPacketBW = false;
424 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
427 if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
430 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
432 //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance
433 if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
434 tcb_desc->bPacketBW = true;
438 static void ieee80211_query_protectionmode(struct ieee80211_device *ieee,
439 struct cb_desc *tcb_desc,
443 tcb_desc->bRTSSTBC = false;
444 tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used.
445 tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS
446 tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate.
447 tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz
449 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
452 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
455 if (ieee->mode < IEEE_N_24G) //b, g mode
457 // (1) RTS_Threshold is compared to the MPDU, not MSDU.
458 // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame.
459 // Other fragments are protected by previous fragment.
460 // So we only need to check the length of first fragment.
461 if (skb->len > ieee->rts)
463 tcb_desc->bRTSEnable = true;
464 tcb_desc->rts_rate = MGN_24M;
466 else if (ieee->current_network.buseprotection)
468 // Use CTS-to-SELF in protection mode.
469 tcb_desc->bRTSEnable = true;
470 tcb_desc->bCTSEnable = true;
471 tcb_desc->rts_rate = MGN_24M;
477 {// 11n High throughput case.
478 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
481 //check ERP protection
482 if (ieee->current_network.buseprotection)
484 tcb_desc->bRTSEnable = true;
485 tcb_desc->bCTSEnable = true;
486 tcb_desc->rts_rate = MGN_24M;
490 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
492 u8 HTOpMode = pHTInfo->CurrentOpMode;
493 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
494 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
496 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
497 tcb_desc->bRTSEnable = true;
502 if (skb->len > ieee->rts)
504 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
505 tcb_desc->bRTSEnable = true;
508 //to do list: check MIMO power save condition.
509 //check AMPDU aggregation for TXOP
510 if(tcb_desc->bAMPDUEnable)
512 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
513 // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads
514 // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily
515 tcb_desc->bRTSEnable = false;
519 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
521 tcb_desc->bCTSEnable = true;
522 tcb_desc->rts_rate = MGN_24M;
523 tcb_desc->bRTSEnable = true;
526 // Totally no protection case!!
530 // For test , CTS replace with RTS
532 tcb_desc->bCTSEnable = true;
533 tcb_desc->rts_rate = MGN_24M;
534 tcb_desc->bRTSEnable = true;
536 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
537 tcb_desc->bUseShortPreamble = true;
538 if (ieee->mode == IW_MODE_MASTER)
542 tcb_desc->bRTSEnable = false;
543 tcb_desc->bCTSEnable = false;
544 tcb_desc->rts_rate = 0;
546 tcb_desc->bRTSBW = false;
550 static void ieee80211_txrate_selectmode(struct ieee80211_device *ieee,
551 struct cb_desc *tcb_desc)
554 if(!IsDataFrame(pFrame))
556 pTcb->bTxDisableRateFallBack = true;
557 pTcb->bTxUseDriverAssingedRate = true;
562 if(pMgntInfo->ForcedDataRate!= 0)
564 pTcb->bTxDisableRateFallBack = true;
565 pTcb->bTxUseDriverAssingedRate = true;
569 if(ieee->bTxDisableRateFallBack)
570 tcb_desc->bTxDisableRateFallBack = true;
572 if(ieee->bTxUseDriverAssingedRate)
573 tcb_desc->bTxUseDriverAssingedRate = true;
574 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
576 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
577 tcb_desc->RATRIndex = 0;
581 static void ieee80211_query_seqnum(struct ieee80211_device *ieee,
582 struct sk_buff *skb, u8 *dst)
584 if (is_multicast_ether_addr(dst))
586 if (IsQoSDataFrame(skb->data)) //we deal qos data only
588 PTX_TS_RECORD pTS = NULL;
589 if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTS), dst, skb->priority, TX_DIR, true))
593 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
597 int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
599 struct ieee80211_device *ieee = netdev_priv(dev);
600 struct ieee80211_txb *txb = NULL;
601 struct rtl_80211_hdr_3addrqos *frag_hdr;
602 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
604 struct net_device_stats *stats = &ieee->stats;
605 int ether_type = 0, encrypt;
606 int bytes, fc, qos_ctl = 0, hdr_len;
607 struct sk_buff *skb_frag;
608 struct rtl_80211_hdr_3addrqos header = { /* Ensure zero initialized */
613 u8 dest[ETH_ALEN], src[ETH_ALEN];
614 int qos_actived = ieee->current_network.qos_data.active;
616 struct ieee80211_crypt_data *crypt;
618 struct cb_desc *tcb_desc;
620 spin_lock_irqsave(&ieee->lock, flags);
622 /* If there is no driver handler to take the TXB, dont' bother
625 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))||
626 ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
627 printk(KERN_WARNING "%s: No xmit handler.\n",
633 if(likely(ieee->raw_tx == 0)){
634 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
635 printk(KERN_WARNING "%s: skb too small (%d).\n",
636 ieee->dev->name, skb->len);
640 memset(skb->cb, 0, sizeof(skb->cb));
641 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
643 crypt = ieee->crypt[ieee->tx_keyidx];
645 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
646 ieee->host_encrypt && crypt && crypt->ops;
648 if (!encrypt && ieee->ieee802_1x &&
649 ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
653 #ifdef CONFIG_IEEE80211_DEBUG
654 if (crypt && !encrypt && ether_type == ETH_P_PAE) {
655 struct eapol *eap = (struct eapol *)(skb->data +
656 sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16));
657 IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n",
658 eap_get_type(eap->type));
662 /* Save source and destination addresses */
663 memcpy(&dest, skb->data, ETH_ALEN);
664 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
666 /* Advance the SKB to the start of the payload */
667 skb_pull(skb, sizeof(struct ethhdr));
669 /* Determine total amount of storage required for TXB packets */
670 bytes = skb->len + SNAP_SIZE + sizeof(u16);
673 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
676 fc = IEEE80211_FTYPE_DATA;
678 //if(ieee->current_network.QoS_Enable)
680 fc |= IEEE80211_STYPE_QOS_DATA;
682 fc |= IEEE80211_STYPE_DATA;
684 if (ieee->iw_mode == IW_MODE_INFRA) {
685 fc |= IEEE80211_FCTL_TODS;
686 /* 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,
696 memcpy(&header.addr1, dest, ETH_ALEN);
697 memcpy(&header.addr2, src, ETH_ALEN);
698 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
701 header.frame_ctl = cpu_to_le16(fc);
703 /* Determine fragmentation size based on destination (multicast
704 * and broadcast are not fragmented)
706 if (is_multicast_ether_addr(header.addr1)) {
707 frag_size = MAX_FRAG_THRESHOLD;
708 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
711 frag_size = ieee->fts;//default:392
715 //if (ieee->current_network.QoS_Enable)
718 hdr_len = IEEE80211_3ADDR_LEN + 2;
720 skb->priority = ieee80211_classify(skb, &ieee->current_network);
721 qos_ctl |= skb->priority; //set in the ieee80211_classify
722 header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID);
724 hdr_len = IEEE80211_3ADDR_LEN;
726 /* Determine amount of payload per fragment. Regardless of if
727 * this stack is providing the full 802.11 header, one will
728 * eventually be affixed to this fragment -- so we must account for
729 * it when determining the amount of payload space.
731 bytes_per_frag = frag_size - hdr_len;
733 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
734 bytes_per_frag -= IEEE80211_FCS_LEN;
736 /* Each fragment may need to have room for encryption pre/postfix */
738 bytes_per_frag -= crypt->ops->extra_prefix_len +
739 crypt->ops->extra_postfix_len;
741 /* Number of fragments is the total bytes_per_frag /
742 * payload_per_fragment
744 nr_frags = bytes / bytes_per_frag;
745 bytes_last_frag = bytes % bytes_per_frag;
749 bytes_last_frag = bytes_per_frag;
751 /* When we allocate the TXB we allocate enough space for the reserve
752 * and full fragment bytes (bytes_per_frag doesn't include prefix,
753 * postfix, header, FCS, etc.)
755 txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC);
756 if (unlikely(!txb)) {
757 printk(KERN_WARNING "%s: Could not allocate TXB\n",
761 txb->encrypted = encrypt;
762 txb->payload_size = __cpu_to_le16(bytes);
764 //if (ieee->current_network.QoS_Enable)
767 txb->queue_index = UP2AC(skb->priority);
769 txb->queue_index = WME_AC_BK;
774 for (i = 0; i < nr_frags; i++) {
775 skb_frag = txb->fragments[i];
776 tcb_desc = (struct cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE);
778 skb_frag->priority = skb->priority;//UP2AC(skb->priority);
779 tcb_desc->queue_index = UP2AC(skb->priority);
781 skb_frag->priority = WME_AC_BK;
782 tcb_desc->queue_index = WME_AC_BK;
784 skb_reserve(skb_frag, ieee->tx_headroom);
787 if (ieee->hwsec_active)
788 tcb_desc->bHwSec = 1;
790 tcb_desc->bHwSec = 0;
791 skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
795 tcb_desc->bHwSec = 0;
797 frag_hdr = skb_put_data(skb_frag, &header, hdr_len);
799 /* If this is not the last fragment, then add the MOREFRAGS
800 * bit to the frame control
802 if (i != nr_frags - 1) {
803 frag_hdr->frame_ctl = cpu_to_le16(
804 fc | IEEE80211_FCTL_MOREFRAGS);
805 bytes = bytes_per_frag;
808 /* The last fragment takes the remaining length */
809 bytes = bytes_last_frag;
811 //if(ieee->current_network.QoS_Enable)
814 // add 1 only indicate to corresponding seq number control 2006/7/12
815 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i);
817 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
820 /* Put a SNAP header on the first fragment */
823 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
825 bytes -= SNAP_SIZE + sizeof(u16);
828 skb_put_data(skb_frag, skb->data, bytes);
830 /* Advance the SKB... */
831 skb_pull(skb, bytes);
833 /* Encryption routine will move the header forward in order
834 * to insert the IV between the header and the payload
837 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
839 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
840 skb_put(skb_frag, 4);
845 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
846 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
848 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
850 if (ieee->seq_ctrl[0] == 0xFFF)
851 ieee->seq_ctrl[0] = 0;
856 if (unlikely(skb->len < sizeof(struct rtl_80211_hdr_3addr))) {
857 printk(KERN_WARNING "%s: skb too small (%d).\n",
858 ieee->dev->name, skb->len);
862 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
864 printk(KERN_WARNING "%s: Could not allocate TXB\n",
870 txb->payload_size = __cpu_to_le16(skb->len);
871 skb_put_data(txb->fragments[0], skb->data, skb->len);
875 //WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
878 struct cb_desc *tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
879 tcb_desc->bTxEnableFwCalcDur = 1;
880 if (is_multicast_ether_addr(header.addr1))
881 tcb_desc->bMulticast = 1;
882 if (is_broadcast_ether_addr(header.addr1))
883 tcb_desc->bBroadcast = 1;
884 ieee80211_txrate_selectmode(ieee, tcb_desc);
885 if (tcb_desc->bMulticast || tcb_desc->bBroadcast)
886 tcb_desc->data_rate = ieee->basic_rate;
888 tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate);
889 ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc);
890 ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc);
891 ieee80211_query_HTCapShortGI(ieee, tcb_desc);
892 ieee80211_query_BandwidthMode(ieee, tcb_desc);
893 ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]);
894 ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1);
896 spin_unlock_irqrestore(&ieee->lock, flags);
897 dev_kfree_skb_any(skb);
899 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
900 ieee80211_softmac_xmit(txb, ieee);
902 if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
904 stats->tx_bytes += __le16_to_cpu(txb->payload_size);
907 ieee80211_txb_free(txb);
914 spin_unlock_irqrestore(&ieee->lock, flags);
915 netif_stop_queue(dev);