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/version.h>
51 #include <linux/wireless.h>
52 #include <linux/etherdevice.h>
53 #include <asm/uaccess.h>
54 #include <linux/if_vlan.h>
56 #include "ieee80211.h"
65 802.11 frame_contorl for data frames - 2 bytes
66 ,-----------------------------------------------------------------------------------------.
67 bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
68 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
69 val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
70 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
71 desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep |
72 | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | |
73 '-----------------------------------------------------------------------------------------'
77 ,--------- 'ctrl' expands to >-----------'
79 ,--'---,-------------------------------------------------------------.
80 Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
81 |------|------|---------|---------|---------|------|---------|------|
82 Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
83 | | tion | (BSSID) | | | ence | data | |
84 `--------------------------------------------------| |------'
85 Total: 28 non-data bytes `----.----'
87 .- 'Frame data' expands to <---------------------------'
90 ,---------------------------------------------------.
91 Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
92 |------|------|---------|----------|------|---------|
93 Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
94 | DSAP | SSAP | | | | Packet |
95 | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
96 `-----------------------------------------| |
97 Total: 8 non-data bytes `----.----'
99 .- 'IP Packet' expands, if WEP enabled, to <--'
102 ,-----------------------.
103 Bytes | 4 | 0-2296 | 4 |
104 |-----|-----------|-----|
105 Desc. | IV | Encrypted | ICV |
107 `-----------------------'
108 Total: 8 non-data bytes
111 802.3 Ethernet Data Frame
113 ,-----------------------------------------.
114 Bytes | 6 | 6 | 2 | Variable | 4 |
115 |-------|-------|------|-----------|------|
116 Desc. | Dest. | Source| Type | IP Packet | fcs |
118 `-----------------------------------------'
119 Total: 18 non-data bytes
121 In the event that fragmentation is required, the incoming payload is split into
122 N parts of size ieee->fts. The first fragment contains the SNAP header and the
123 remaining packets are just data.
125 If encryption is enabled, each fragment payload size is reduced by enough space
126 to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
127 So if you have 1500 bytes of payload with ieee->fts set to 500 without
128 encryption it will take 3 frames. With WEP it will take 4 frames as the
129 payload of each frame is reduced to 492 bytes.
135 * | ETHERNET HEADER ,-<-- PAYLOAD
136 * | | 14 bytes from skb->data
137 * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
139 * |,-Dest.--. ,--Src.---. | | |
140 * | 6 bytes| | 6 bytes | | | |
143 * 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
146 * | | | | `T' <---- 2 bytes for Type
148 * | | '---SNAP--' <-------- 6 bytes for SNAP
150 * `-IV--' <-------------------- 4 bytes for IV (WEP)
156 static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
157 static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
159 static inline int ieee80211_put_snap(u8 *data, u16 h_proto)
161 struct ieee80211_snap_hdr *snap;
164 snap = (struct ieee80211_snap_hdr *)data;
169 if (h_proto == 0x8137 || h_proto == 0x80f3)
173 snap->oui[0] = oui[0];
174 snap->oui[1] = oui[1];
175 snap->oui[2] = oui[2];
177 *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
179 return SNAP_SIZE + sizeof(u16);
182 int ieee80211_encrypt_fragment(
183 struct ieee80211_device *ieee,
184 struct sk_buff *frag,
187 struct ieee80211_crypt_data* crypt = ieee->crypt[ieee->tx_keyidx];
190 if (!(crypt && crypt->ops))
192 printk("=========>%s(), crypt is null\n", __FUNCTION__);
195 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
196 struct ieee80211_hdr *header;
198 if (ieee->tkip_countermeasures &&
199 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
200 header = (struct ieee80211_hdr *) frag->data;
201 if (net_ratelimit()) {
202 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
203 "TX packet to %pM\n",
204 ieee->dev->name, header->addr1);
209 /* To encrypt, frame format is:
210 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */
212 // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption.
213 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
214 * call both MSDU and MPDU encryption functions from here. */
215 atomic_inc(&crypt->refcnt);
217 if (crypt->ops->encrypt_msdu)
218 res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv);
219 if (res == 0 && crypt->ops->encrypt_mpdu)
220 res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv);
222 atomic_dec(&crypt->refcnt);
224 printk(KERN_INFO "%s: Encryption failed: len=%d.\n",
225 ieee->dev->name, frag->len);
226 ieee->ieee_stats.tx_discards++;
234 void ieee80211_txb_free(struct ieee80211_txb *txb) {
239 for (i = 0; i < txb->nr_frags; i++)
240 if (txb->fragments[i])
241 dev_kfree_skb_any(txb->fragments[i]);
246 struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
249 struct ieee80211_txb *txb;
252 sizeof(struct ieee80211_txb) + (sizeof(u8*) * nr_frags),
257 memset(txb, 0, sizeof(struct ieee80211_txb));
258 txb->nr_frags = nr_frags;
259 txb->frag_size = txb_size;
261 for (i = 0; i < nr_frags; i++) {
262 txb->fragments[i] = dev_alloc_skb(txb_size);
263 if (unlikely(!txb->fragments[i])) {
267 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
269 if (unlikely(i != nr_frags)) {
271 dev_kfree_skb_any(txb->fragments[i--]);
278 // Classify the to-be send data packet
279 // Need to acquire the sent queue index.
281 ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
285 eth = (struct ethhdr *)skb->data;
286 if (eth->h_proto != htons(ETH_P_IP))
289 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
290 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22))
293 ip = (struct iphdr*)(skb->data + sizeof(struct ether_header));
295 switch (ip->tos & 0xfc) {
315 #define SN_LESS(a, b) (((a-b)&0x800)!=0)
316 void ieee80211_tx_query_agg_cap(struct ieee80211_device* ieee, struct sk_buff* skb, cb_desc* tcb_desc)
318 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
319 PTX_TS_RECORD pTxTs = NULL;
320 struct ieee80211_hdr_1addr* hdr = (struct ieee80211_hdr_1addr*)skb->data;
322 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
324 if (!IsQoSDataFrame(skb->data))
327 if (is_multicast_ether_addr(hdr->addr1) || is_broadcast_ether_addr(hdr->addr1))
329 //check packet and mode later
331 if(pTcb->PacketLength >= 4096)
333 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
334 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
338 if(tcb_desc->bdhcp)// || ieee->CntAfterLink<2)
345 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
350 if(pHTInfo->bCurrentAMPDUEnable)
352 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
354 printk("===>can't get TS\n");
357 if (pTxTs->TxAdmittedBARecord.bValid == false)
359 //as some AP will refuse our action frame until key handshake has been finished. WB
360 if (ieee->wpa_ie_len && (ieee->pairwise_key_type == KEY_TYPE_NA))
363 TsStartAddBaProcess(ieee, pTxTs);
364 goto FORCED_AGG_SETTING;
366 else if (pTxTs->bUsingBa == false)
368 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
369 pTxTs->bUsingBa = true;
371 goto FORCED_AGG_SETTING;
374 if (ieee->iw_mode == IW_MODE_INFRA)
376 tcb_desc->bAMPDUEnable = true;
377 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
378 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
382 switch(pHTInfo->ForcedAMPDUMode )
387 case HT_AGG_FORCE_ENABLE:
388 tcb_desc->bAMPDUEnable = true;
389 tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
390 tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
393 case HT_AGG_FORCE_DISABLE:
394 tcb_desc->bAMPDUEnable = false;
395 tcb_desc->ampdu_density = 0;
396 tcb_desc->ampdu_factor = 0;
403 extern void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device* ieee, cb_desc* tcb_desc)
405 tcb_desc->bUseShortPreamble = false;
406 if (tcb_desc->data_rate == 2)
407 {//// 1M can only use Long Preamble. 11B spec
410 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
412 tcb_desc->bUseShortPreamble = true;
417 ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, cb_desc *tcb_desc)
419 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
421 tcb_desc->bUseShortGI = false;
423 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
426 if(pHTInfo->bForcedShortGI)
428 tcb_desc->bUseShortGI = true;
432 if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz)
433 tcb_desc->bUseShortGI = true;
434 else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz)
435 tcb_desc->bUseShortGI = true;
438 void ieee80211_query_BandwidthMode(struct ieee80211_device* ieee, cb_desc *tcb_desc)
440 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
442 tcb_desc->bPacketBW = false;
444 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
447 if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
450 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
452 //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance
453 if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
454 tcb_desc->bPacketBW = true;
458 void ieee80211_query_protectionmode(struct ieee80211_device* ieee, cb_desc* tcb_desc, struct sk_buff* skb)
461 tcb_desc->bRTSSTBC = false;
462 tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used.
463 tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS
464 tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate.
465 tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz
467 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
470 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
473 if (ieee->mode < IEEE_N_24G) //b, g mode
475 // (1) RTS_Threshold is compared to the MPDU, not MSDU.
476 // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame.
477 // Other fragments are protected by previous fragment.
478 // So we only need to check the length of first fragment.
479 if (skb->len > ieee->rts)
481 tcb_desc->bRTSEnable = true;
482 tcb_desc->rts_rate = MGN_24M;
484 else if (ieee->current_network.buseprotection)
486 // Use CTS-to-SELF in protection mode.
487 tcb_desc->bRTSEnable = true;
488 tcb_desc->bCTSEnable = true;
489 tcb_desc->rts_rate = MGN_24M;
495 {// 11n High throughput case.
496 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
499 //check ERP protection
500 if (ieee->current_network.buseprotection)
502 tcb_desc->bRTSEnable = true;
503 tcb_desc->bCTSEnable = true;
504 tcb_desc->rts_rate = MGN_24M;
508 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
510 u8 HTOpMode = pHTInfo->CurrentOpMode;
511 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
512 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
514 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
515 tcb_desc->bRTSEnable = true;
520 if (skb->len > ieee->rts)
522 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
523 tcb_desc->bRTSEnable = true;
526 //to do list: check MIMO power save condition.
527 //check AMPDU aggregation for TXOP
528 if(tcb_desc->bAMPDUEnable)
530 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
531 // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads
532 // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily
533 tcb_desc->bRTSEnable = false;
537 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
539 tcb_desc->bCTSEnable = true;
540 tcb_desc->rts_rate = MGN_24M;
541 tcb_desc->bRTSEnable = true;
544 // Totally no protection case!!
548 // For test , CTS replace with RTS
551 tcb_desc->bCTSEnable = true;
552 tcb_desc->rts_rate = MGN_24M;
553 tcb_desc->bRTSEnable = true;
555 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
556 tcb_desc->bUseShortPreamble = true;
557 if (ieee->mode == IW_MODE_MASTER)
561 tcb_desc->bRTSEnable = false;
562 tcb_desc->bCTSEnable = false;
563 tcb_desc->rts_rate = 0;
565 tcb_desc->bRTSBW = false;
569 void ieee80211_txrate_selectmode(struct ieee80211_device* ieee, cb_desc* tcb_desc)
572 if(!IsDataFrame(pFrame))
574 pTcb->bTxDisableRateFallBack = TRUE;
575 pTcb->bTxUseDriverAssingedRate = TRUE;
580 if(pMgntInfo->ForcedDataRate!= 0)
582 pTcb->bTxDisableRateFallBack = TRUE;
583 pTcb->bTxUseDriverAssingedRate = TRUE;
587 if(ieee->bTxDisableRateFallBack)
588 tcb_desc->bTxDisableRateFallBack = true;
590 if(ieee->bTxUseDriverAssingedRate)
591 tcb_desc->bTxUseDriverAssingedRate = true;
592 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
594 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
595 tcb_desc->RATRIndex = 0;
599 void ieee80211_query_seqnum(struct ieee80211_device*ieee, struct sk_buff* skb, u8* dst)
601 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst))
603 if (IsQoSDataFrame(skb->data)) //we deal qos data only
605 PTX_TS_RECORD pTS = NULL;
606 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTS), dst, skb->priority, TX_DIR, true))
610 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
614 int ieee80211_rtl_xmit(struct sk_buff *skb, struct net_device *dev)
616 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
617 struct ieee80211_device *ieee = netdev_priv(dev);
619 struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv;
621 struct ieee80211_txb *txb = NULL;
622 struct ieee80211_hdr_3addrqos *frag_hdr;
623 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
625 struct net_device_stats *stats = &ieee->stats;
626 int ether_type = 0, encrypt;
627 int bytes, fc, qos_ctl = 0, hdr_len;
628 struct sk_buff *skb_frag;
629 struct ieee80211_hdr_3addrqos header = { /* Ensure zero initialized */
634 u8 dest[ETH_ALEN], src[ETH_ALEN];
635 int qos_actived = ieee->current_network.qos_data.active;
637 struct ieee80211_crypt_data* crypt;
642 spin_lock_irqsave(&ieee->lock, flags);
644 /* If there is no driver handler to take the TXB, dont' bother
646 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))||
647 ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
648 printk(KERN_WARNING "%s: No xmit handler.\n",
654 if(likely(ieee->raw_tx == 0)){
655 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
656 printk(KERN_WARNING "%s: skb too small (%d).\n",
657 ieee->dev->name, skb->len);
661 memset(skb->cb, 0, sizeof(skb->cb));
662 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
664 crypt = ieee->crypt[ieee->tx_keyidx];
666 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
667 ieee->host_encrypt && crypt && crypt->ops;
669 if (!encrypt && ieee->ieee802_1x &&
670 ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
674 #ifdef CONFIG_IEEE80211_DEBUG
675 if (crypt && !encrypt && ether_type == ETH_P_PAE) {
676 struct eapol *eap = (struct eapol *)(skb->data +
677 sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16));
678 IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n",
679 eap_get_type(eap->type));
683 // The following is for DHCP and ARP packet, we use cck1M to tx these packets and let LPS awake some time
684 // to prevent DHCP protocol fail
685 if (skb->len > 282){//MINIMUM_DHCP_PACKET_SIZE) {
686 if (ETH_P_IP == ether_type) {// IP header
687 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
688 if (IPPROTO_UDP == ip->protocol) {//FIXME windows is 11 but here UDP in linux kernel is 17.
689 struct udphdr *udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
690 //if(((ntohs(udp->source) == 68) && (ntohs(udp->dest) == 67)) ||
691 /// ((ntohs(udp->source) == 67) && (ntohs(udp->dest) == 68))) {
692 if(((((u8 *)udp)[1] == 68) && (((u8 *)udp)[3] == 67)) ||
693 ((((u8 *)udp)[1] == 67) && (((u8 *)udp)[3] == 68))) {
694 // 68 : UDP BOOTP client
695 // 67 : UDP BOOTP server
696 printk("DHCP pkt src port:%d, dest port:%d!!\n", ((u8 *)udp)[1],((u8 *)udp)[3]);
697 // Use low rate to send DHCP packet.
698 //if(pMgntInfo->IOTAction & HT_IOT_ACT_WA_IOT_Broadcom)
700 // tcb_desc->DataRate = MgntQuery_TxRateExcludeCCKRates(ieee);//0xc;//ofdm 6m
701 // tcb_desc->bTxDisableRateFallBack = false;
704 //pTcb->DataRate = Adapter->MgntInfo.LowestBasicRate;
705 //RTPRINT(FDM, WA_IOT, ("DHCP TranslateHeader(), pTcb->DataRate = 0x%x\n", pTcb->DataRate));
708 #ifdef _RTL8192_EXT_PATCH_
709 ieee->LPSDelayCnt = 100;//pPSC->LPSAwakeIntvl*2; //AMY,090701
711 ieee->LPSDelayCnt = 100;//pPSC->LPSAwakeIntvl*2;
715 }else if(ETH_P_ARP == ether_type){// IP ARP packet
716 printk("=================>DHCP Protocol start tx ARP pkt!!\n");
718 ieee->LPSDelayCnt = ieee->current_network.tim.tim_count;
720 //if(pMgntInfo->IOTAction & HT_IOT_ACT_WA_IOT_Broadcom)
722 // tcb_desc->DataRate = MgntQuery_TxRateExcludeCCKRates(Adapter->MgntInfo.mBrates);//0xc;//ofdm 6m
723 // tcb_desc->bTxDisableRateFallBack = FALSE;
726 // tcb_desc->DataRate = Adapter->MgntInfo.LowestBasicRate;
727 //RTPRINT(FDM, WA_IOT, ("ARP TranslateHeader(), pTcb->DataRate = 0x%x\n", pTcb->DataRate));
732 /* Save source and destination addresses */
733 memcpy(&dest, skb->data, ETH_ALEN);
734 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
736 /* Advance the SKB to the start of the payload */
737 skb_pull(skb, sizeof(struct ethhdr));
739 /* Determine total amount of storage required for TXB packets */
740 bytes = skb->len + SNAP_SIZE + sizeof(u16);
743 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
746 fc = IEEE80211_FTYPE_DATA;
748 //if(ieee->current_network.QoS_Enable)
750 fc |= IEEE80211_STYPE_QOS_DATA;
752 fc |= IEEE80211_STYPE_DATA;
754 if (ieee->iw_mode == IW_MODE_INFRA) {
755 fc |= IEEE80211_FCTL_TODS;
756 /* To DS: Addr1 = BSSID, Addr2 = SA,
758 memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN);
759 memcpy(&header.addr2, &src, ETH_ALEN);
760 memcpy(&header.addr3, &dest, ETH_ALEN);
761 } else if (ieee->iw_mode == IW_MODE_ADHOC) {
762 /* not From/To DS: Addr1 = DA, Addr2 = SA,
764 memcpy(&header.addr1, dest, ETH_ALEN);
765 memcpy(&header.addr2, src, ETH_ALEN);
766 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
769 header.frame_ctl = cpu_to_le16(fc);
771 /* Determine fragmentation size based on destination (multicast
772 * and broadcast are not fragmented) */
773 if (is_multicast_ether_addr(header.addr1) ||
774 is_broadcast_ether_addr(header.addr1)) {
775 frag_size = MAX_FRAG_THRESHOLD;
776 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
779 frag_size = ieee->fts;//default:392
783 //if (ieee->current_network.QoS_Enable)
786 hdr_len = IEEE80211_3ADDR_LEN + 2;
788 skb->priority = ieee80211_classify(skb, &ieee->current_network);
789 qos_ctl |= skb->priority; //set in the ieee80211_classify
790 header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID);
792 hdr_len = IEEE80211_3ADDR_LEN;
794 /* Determine amount of payload per fragment. Regardless of if
795 * this stack is providing the full 802.11 header, one will
796 * eventually be affixed to this fragment -- so we must account for
797 * it when determining the amount of payload space. */
798 bytes_per_frag = frag_size - hdr_len;
800 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
801 bytes_per_frag -= IEEE80211_FCS_LEN;
803 /* Each fragment may need to have room for encryptiong pre/postfix */
805 bytes_per_frag -= crypt->ops->extra_prefix_len +
806 crypt->ops->extra_postfix_len;
808 /* Number of fragments is the total bytes_per_frag /
809 * payload_per_fragment */
810 nr_frags = bytes / bytes_per_frag;
811 bytes_last_frag = bytes % bytes_per_frag;
815 bytes_last_frag = bytes_per_frag;
817 /* When we allocate the TXB we allocate enough space for the reserve
818 * and full fragment bytes (bytes_per_frag doesn't include prefix,
819 * postfix, header, FCS, etc.) */
820 txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC);
821 if (unlikely(!txb)) {
822 printk(KERN_WARNING "%s: Could not allocate TXB\n",
826 txb->encrypted = encrypt;
827 txb->payload_size = bytes;
829 //if (ieee->current_network.QoS_Enable)
832 txb->queue_index = UP2AC(skb->priority);
834 txb->queue_index = WME_AC_BK;;
839 for (i = 0; i < nr_frags; i++) {
840 skb_frag = txb->fragments[i];
841 tcb_desc = (cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE);
843 skb_frag->priority = skb->priority;//UP2AC(skb->priority);
844 tcb_desc->queue_index = UP2AC(skb->priority);
846 skb_frag->priority = WME_AC_BK;
847 tcb_desc->queue_index = WME_AC_BK;
849 skb_reserve(skb_frag, ieee->tx_headroom);
852 if (ieee->hwsec_active)
853 tcb_desc->bHwSec = 1;
855 tcb_desc->bHwSec = 0;
856 skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
860 tcb_desc->bHwSec = 0;
862 frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
863 memcpy(frag_hdr, &header, hdr_len);
865 /* If this is not the last fragment, then add the MOREFRAGS
866 * bit to the frame control */
867 if (i != nr_frags - 1) {
868 frag_hdr->frame_ctl = cpu_to_le16(
869 fc | IEEE80211_FCTL_MOREFRAGS);
870 bytes = bytes_per_frag;
873 /* The last fragment takes the remaining length */
874 bytes = bytes_last_frag;
876 //if(ieee->current_network.QoS_Enable)
879 // add 1 only indicate to corresponding seq number control 2006/7/12
880 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i);
882 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
885 /* Put a SNAP header on the first fragment */
888 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
890 bytes -= SNAP_SIZE + sizeof(u16);
893 memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
895 /* Advance the SKB... */
896 skb_pull(skb, bytes);
898 /* Encryption routine will move the header forward in order
899 * to insert the IV between the header and the payload */
901 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
903 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
904 skb_put(skb_frag, 4);
909 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
910 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
912 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
914 if (ieee->seq_ctrl[0] == 0xFFF)
915 ieee->seq_ctrl[0] = 0;
920 if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) {
921 printk(KERN_WARNING "%s: skb too small (%d).\n",
922 ieee->dev->name, skb->len);
926 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
928 printk(KERN_WARNING "%s: Could not allocate TXB\n",
934 txb->payload_size = skb->len;
935 memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len);
939 //WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
943 cb_desc *tcb_desc = (cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
944 tcb_desc->bTxEnableFwCalcDur = 1;
945 if (is_multicast_ether_addr(header.addr1))
946 tcb_desc->bMulticast = 1;
947 if (is_broadcast_ether_addr(header.addr1))
948 tcb_desc->bBroadcast = 1;
949 ieee80211_txrate_selectmode(ieee, tcb_desc);
950 if ( tcb_desc->bMulticast || tcb_desc->bBroadcast)
951 tcb_desc->data_rate = ieee->basic_rate;
953 //tcb_desc->data_rate = CURRENT_RATE(ieee->current_network.mode, ieee->rate, ieee->HTCurrentOperaRate);
954 tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate);
957 // Use low rate to send DHCP packet.
958 //if(ieee->pHTInfo->IOTAction & HT_IOT_ACT_WA_IOT_Broadcom) {
959 // tcb_desc->data_rate = MGN_1M;//MgntQuery_TxRateExcludeCCKRates(ieee);//0xc;//ofdm 6m
960 // tcb_desc->bTxDisableRateFallBack = false;
964 tcb_desc->data_rate = MGN_1M;
965 tcb_desc->bTxDisableRateFallBack = 1;
968 tcb_desc->RATRIndex = 7;
969 tcb_desc->bTxUseDriverAssingedRate = 1;
974 ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc);
975 ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc);
976 ieee80211_query_HTCapShortGI(ieee, tcb_desc);
977 ieee80211_query_BandwidthMode(ieee, tcb_desc);
978 ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]);
979 ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1);
980 // IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, txb->fragments[0]->data, txb->fragments[0]->len);
981 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, tcb_desc, sizeof(cb_desc));
984 spin_unlock_irqrestore(&ieee->lock, flags);
985 dev_kfree_skb_any(skb);
987 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
988 ieee80211_softmac_xmit(txb, ieee);
990 if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
992 stats->tx_bytes += txb->payload_size;
995 ieee80211_txb_free(txb);
1002 spin_unlock_irqrestore(&ieee->lock, flags);
1003 netif_stop_queue(dev);
1009 //EXPORT_SYMBOL(ieee80211_txb_free);