Release 4.11 drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
/******************************************************************************
*
* Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*
* Few modifications for Realtek's Wi-Fi drivers by
* Andrea Merello <andrea.merello@gmail.com>
*
* A special thanks goes to Realtek for their support !
*
******************************************************************************/
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <linux/uaccess.h>
#include <linux/if_vlan.h>
#include "ieee80211.h"
/*
*
*
* 802.11 Data Frame
*
*
* 802.11 frame_contorl for data frames - 2 bytes
* ,-----------------------------------------------------------------------------------------.
* bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
* |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
* val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
* |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------|
* desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep |
* | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | |
* '-----------------------------------------------------------------------------------------'
* /\
* |
* 802.11 Data Frame |
* ,--------- 'ctrl' expands to >-----------'
* |
* ,--'---,-------------------------------------------------------------.
* Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
* |------|------|---------|---------|---------|------|---------|------|
* Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
* | | tion | (BSSID) | | | ence | data | |
* `--------------------------------------------------| |------'
* Total: 28 non-data bytes `----.----'
* |
* .- 'Frame data' expands to <---------------------------'
* |
* V
* ,---------------------------------------------------.
* Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
* |------|------|---------|----------|------|---------|
* Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
* | DSAP | SSAP | | | | Packet |
* | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
* `-----------------------------------------| |
* Total: 8 non-data bytes `----.----'
* |
* .- 'IP Packet' expands, if WEP enabled, to <--'
* |
* V
* ,-----------------------.
* Bytes | 4 | 0-2296 | 4 |
* |-----|-----------|-----|
* Desc. | IV | Encrypted | ICV |
* | | IP Packet | |
* `-----------------------'
* Total: 8 non-data bytes
*
*
* 802.3 Ethernet Data Frame
*
* ,-----------------------------------------.
* Bytes | 6 | 6 | 2 | Variable | 4 |
* |-------|-------|------|-----------|------|
* Desc. | Dest. | Source| Type | IP Packet | fcs |
* | MAC | MAC | | | |
* `-----------------------------------------'
* Total: 18 non-data bytes
*
* In the event that fragmentation is required, the incoming payload is split into
* N parts of size ieee->fts. The first fragment contains the SNAP header and the
* remaining packets are just data.
*
* If encryption is enabled, each fragment payload size is reduced by enough space
* to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
* So if you have 1500 bytes of payload with ieee->fts set to 500 without
* encryption it will take 3 frames. With WEP it will take 4 frames as the
* payload of each frame is reduced to 492 bytes.
*
* SKB visualization
*
* ,- skb->data
* |
* | ETHERNET HEADER ,-<-- PAYLOAD
* | | 14 bytes from skb->data
* | 2 bytes for Type --> ,T. | (sizeof ethhdr)
* | | | |
* |,-Dest.--. ,--Src.---. | | |
* | 6 bytes| | 6 bytes | | | |
* v | | | | | |
* 0 | v 1 | v | v 2
* 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
* ^ | ^ | ^ |
* | | | | | |
* | | | | `T' <---- 2 bytes for Type
* | | | |
* | | '---SNAP--' <-------- 6 bytes for SNAP
* | |
* `-IV--' <-------------------- 4 bytes for IV (WEP)
*
* SNAP HEADER
*
*/
static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
static inline int ieee80211_put_snap(u8 *data, u16 h_proto)
{
struct ieee80211_snap_hdr *snap;
u8 *oui;
snap = (struct ieee80211_snap_hdr *)data;
snap->dsap = 0xaa;
snap->ssap = 0xaa;
snap->ctrl = 0x03;
if (h_proto == 0x8137 || h_proto == 0x80f3)
oui = P802_1H_OUI;
else
oui = RFC1042_OUI;
snap->oui[0] = oui[0];
snap->oui[1] = oui[1];
snap->oui[2] = oui[2];
*(u16 *)(data + SNAP_SIZE) = htons(h_proto);
return SNAP_SIZE + sizeof(u16);
}
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| Total | 129 | 100.00% | 1 | 100.00% |
int ieee80211_encrypt_fragment(
struct ieee80211_device *ieee,
struct sk_buff *frag,
int hdr_len)
{
struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx];
int res;
if (!(crypt && crypt->ops))
{
printk("=========>%s(), crypt is null\n", __func__);
return -1;
}
if (ieee->tkip_countermeasures &&
crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
if (net_ratelimit()) {
struct rtl_80211_hdr_3addrqos *header;
header = (struct rtl_80211_hdr_3addrqos *)frag->data;
printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
"TX packet to %pM\n",
ieee->dev->name, header->addr1);
}
return -1;
}
/* To encrypt, frame format is:
* IV (4 bytes), clear payload (including SNAP), ICV (4 bytes)
*/
// PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption.
/* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
* call both MSDU and MPDU encryption functions from here.
*/
atomic_inc(&crypt->refcnt);
res = 0;
if (crypt->ops->encrypt_msdu)
res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv);
if (res == 0 && crypt->ops->encrypt_mpdu)
res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv);
atomic_dec(&crypt->refcnt);
if (res < 0) {
printk(KERN_INFO "%s: Encryption failed: len=%d.\n",
ieee->dev->name, frag->len);
ieee->ieee_stats.tx_discards++;
return -1;
}
return 0;
}
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| Joe Perches | 2 | 0.82% | 2 | 33.33% |
| Derek Robson | 2 | 0.82% | 1 | 16.67% |
| Total | 245 | 100.00% | 6 | 100.00% |
void ieee80211_txb_free(struct ieee80211_txb *txb) {
//int i;
if (unlikely(!txb))
return;
kfree(txb);
}
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EXPORT_SYMBOL(ieee80211_txb_free);
static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
gfp_t gfp_mask)
{
struct ieee80211_txb *txb;
int i;
txb = kmalloc(
sizeof(struct ieee80211_txb) + (sizeof(u8 *) * nr_frags),
gfp_mask);
if (!txb)
return NULL;
memset(txb, 0, sizeof(struct ieee80211_txb));
txb->nr_frags = nr_frags;
txb->frag_size = __cpu_to_le16(txb_size);
for (i = 0; i < nr_frags; i++) {
txb->fragments[i] = dev_alloc_skb(txb_size);
if (unlikely(!txb->fragments[i])) {
i--;
break;
}
memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
}
if (unlikely(i != nr_frags)) {
while (i >= 0)
dev_kfree_skb_any(txb->fragments[i--]);
kfree(txb);
return NULL;
}
return txb;
}
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| Total | 195 | 100.00% | 4 | 100.00% |
// Classify the to-be send data packet
// Need to acquire the sent queue index.
static int
ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
{
struct ethhdr *eth;
struct iphdr *ip;
eth = (struct ethhdr *)skb->data;
if (eth->h_proto != htons(ETH_P_IP))
return 0;
// IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
ip = ip_hdr(skb);
switch (ip->tos & 0xfc) {
case 0x20:
return 2;
case 0x40:
return 1;
case 0x60:
return 3;
case 0x80:
return 4;
case 0xa0:
return 5;
case 0xc0:
return 6;
case 0xe0:
return 7;
default:
return 0;
}
}
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#define SN_LESS(a, b) (((a-b)&0x800)!=0)
static void ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee,
struct sk_buff *skb, struct cb_desc *tcb_desc)
{
PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
PTX_TS_RECORD pTxTs = NULL;
struct rtl_80211_hdr_1addr *hdr = (struct rtl_80211_hdr_1addr *)skb->data;
if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
return;
if (!IsQoSDataFrame(skb->data))
return;
if (is_multicast_ether_addr(hdr->addr1))
return;
//check packet and mode later
#ifdef TO_DO_LIST
if(pTcb->PacketLength >= 4096)
return;
// For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation.
if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter))
return;
#endif
if(!ieee->GetNmodeSupportBySecCfg(ieee->dev))
{
return;
}
if(pHTInfo->bCurrentAMPDUEnable)
{
if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true))
{
printk("===>can't get TS\n");
return;
}
if (!pTxTs->TxAdmittedBARecord.bValid)
{
TsStartAddBaProcess(ieee, pTxTs);
goto FORCED_AGG_SETTING;
}
else if (!pTxTs->bUsingBa)
{
if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096))
pTxTs->bUsingBa = true;
else
goto FORCED_AGG_SETTING;
}
if (ieee->iw_mode == IW_MODE_INFRA)
{
tcb_desc->bAMPDUEnable = true;
tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
}
}
FORCED_AGG_SETTING:
switch (pHTInfo->ForcedAMPDUMode )
{
case HT_AGG_AUTO:
break;
case HT_AGG_FORCE_ENABLE:
tcb_desc->bAMPDUEnable = true;
tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
break;
case HT_AGG_FORCE_DISABLE:
tcb_desc->bAMPDUEnable = false;
tcb_desc->ampdu_density = 0;
tcb_desc->ampdu_factor = 0;
break;
}
return;
}
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| simran singhal | 1 | 0.30% | 1 | 20.00% |
| Teodora Baluta | 1 | 0.30% | 1 | 20.00% |
| Total | 331 | 100.00% | 5 | 100.00% |
static void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device *ieee,
struct cb_desc *tcb_desc)
{
tcb_desc->bUseShortPreamble = false;
if (tcb_desc->data_rate == 2)
{//// 1M can only use Long Preamble. 11B spec
return;
}
else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
{
tcb_desc->bUseShortPreamble = true;
}
return;
}
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| Total | 54 | 100.00% | 3 | 100.00% |
static void
ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, struct cb_desc *tcb_desc)
{
PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
tcb_desc->bUseShortGI = false;
if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
return;
if(pHTInfo->bForcedShortGI)
{
tcb_desc->bUseShortGI = true;
return;
}
if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz)
tcb_desc->bUseShortGI = true;
else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz)
tcb_desc->bUseShortGI = true;
}
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| Total | 98 | 100.00% | 3 | 100.00% |
static void ieee80211_query_BandwidthMode(struct ieee80211_device *ieee,
struct cb_desc *tcb_desc)
{
PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
tcb_desc->bPacketBW = false;
if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT)
return;
if(tcb_desc->bMulticast || tcb_desc->bBroadcast)
return;
if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel.
return;
//BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance
if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
tcb_desc->bPacketBW = true;
return;
}
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| Total | 92 | 100.00% | 3 | 100.00% |
static void ieee80211_query_protectionmode(struct ieee80211_device *ieee,
struct cb_desc *tcb_desc,
struct sk_buff *skb)
{
// Common Settings
tcb_desc->bRTSSTBC = false;
tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used.
tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS
tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate.
tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz
if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts
return;
if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA.
return;
if (ieee->mode < IEEE_N_24G) //b, g mode
{
// (1) RTS_Threshold is compared to the MPDU, not MSDU.
// (2) If there are more than one frag in this MSDU, only the first frag uses protection frame.
// Other fragments are protected by previous fragment.
// So we only need to check the length of first fragment.
if (skb->len > ieee->rts)
{
tcb_desc->bRTSEnable = true;
tcb_desc->rts_rate = MGN_24M;
}
else if (ieee->current_network.buseprotection)
{
// Use CTS-to-SELF in protection mode.
tcb_desc->bRTSEnable = true;
tcb_desc->bCTSEnable = true;
tcb_desc->rts_rate = MGN_24M;
}
//otherwise return;
return;
}
else
{// 11n High throughput case.
PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
while (true)
{
//check ERP protection
if (ieee->current_network.buseprotection)
{// CTS-to-SELF
tcb_desc->bRTSEnable = true;
tcb_desc->bCTSEnable = true;
tcb_desc->rts_rate = MGN_24M;
break;
}
//check HT op mode
if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT)
{
u8 HTOpMode = pHTInfo->CurrentOpMode;
if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) ||
(!pHTInfo->bCurBW40MHz && HTOpMode == 3) )
{
tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
tcb_desc->bRTSEnable = true;
break;
}
}
//check rts
if (skb->len > ieee->rts)
{
tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
tcb_desc->bRTSEnable = true;
break;
}
//to do list: check MIMO power save condition.
//check AMPDU aggregation for TXOP
if(tcb_desc->bAMPDUEnable)
{
tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps.
// According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads
// throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily
tcb_desc->bRTSEnable = false;
break;
}
//check IOT action
if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF)
{
tcb_desc->bCTSEnable = true;
tcb_desc->rts_rate = MGN_24M;
tcb_desc->bRTSEnable = true;
break;
}
// Totally no protection case!!
goto NO_PROTECTION;
}
}
// For test , CTS replace with RTS
if (0) {
tcb_desc->bCTSEnable = true;
tcb_desc->rts_rate = MGN_24M;
tcb_desc->bRTSEnable = true;
}
if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
tcb_desc->bUseShortPreamble = true;
if (ieee->mode == IW_MODE_MASTER)
goto NO_PROTECTION;
return;
NO_PROTECTION:
tcb_desc->bRTSEnable = false;
tcb_desc->bCTSEnable = false;
tcb_desc->rts_rate = 0;
tcb_desc->RTSSC = 0;
tcb_desc->bRTSBW = false;
}
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| Total | 437 | 100.00% | 3 | 100.00% |
static void ieee80211_txrate_selectmode(struct ieee80211_device *ieee,
struct cb_desc *tcb_desc)
{
#ifdef TO_DO_LIST
if(!IsDataFrame(pFrame))
{
pTcb->bTxDisableRateFallBack = true;
pTcb->bTxUseDriverAssingedRate = true;
pTcb->RATRIndex = 7;
return;
}
if(pMgntInfo->ForcedDataRate!= 0)
{
pTcb->bTxDisableRateFallBack = true;
pTcb->bTxUseDriverAssingedRate = true;
return;
}
#endif
if(ieee->bTxDisableRateFallBack)
tcb_desc->bTxDisableRateFallBack = true;
if(ieee->bTxUseDriverAssingedRate)
tcb_desc->bTxUseDriverAssingedRate = true;
if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate)
{
if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC)
tcb_desc->RATRIndex = 0;
}
}
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| Teodora Baluta | 1 | 0.76% | 1 | 25.00% |
| Total | 131 | 100.00% | 4 | 100.00% |
static void ieee80211_query_seqnum(struct ieee80211_device *ieee,
struct sk_buff *skb, u8 *dst)
{
if (is_multicast_ether_addr(dst))
return;
if (IsQoSDataFrame(skb->data)) //we deal qos data only
{
PTX_TS_RECORD pTS = NULL;
if (!GetTs(ieee, (PTS_COMMON_INFO *)(&pTS), dst, skb->priority, TX_DIR, true))
{
return;
}
pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
}
}
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int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ieee80211_device *ieee = netdev_priv(dev);
struct ieee80211_txb *txb = NULL;
struct rtl_80211_hdr_3addrqos *frag_hdr;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
unsigned long flags;
struct net_device_stats *stats = &ieee->stats;
int ether_type = 0, encrypt;
int bytes, fc, qos_ctl = 0, hdr_len;
struct sk_buff *skb_frag;
struct rtl_80211_hdr_3addrqos header = { /* Ensure zero initialized */
.duration_id = 0,
.seq_ctl = 0,
.qos_ctl = 0
};
u8 dest[ETH_ALEN], src[ETH_ALEN];
int qos_actived = ieee->current_network.qos_data.active;
struct ieee80211_crypt_data *crypt;
struct cb_desc *tcb_desc;
spin_lock_irqsave(&ieee->lock, flags);
/* If there is no driver handler to take the TXB, dont' bother
* creating it...
*/
if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))||
((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
printk(KERN_WARNING "%s: No xmit handler.\n",
ieee->dev->name);
goto success;
}
if(likely(ieee->raw_tx == 0)){
if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
ieee->dev->name, skb->len);
goto success;
}
memset(skb->cb, 0, sizeof(skb->cb));
ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
crypt = ieee->crypt[ieee->tx_keyidx];
encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
ieee->host_encrypt && crypt && crypt->ops;
if (!encrypt && ieee->ieee802_1x &&
ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
stats->tx_dropped++;
goto success;
}
#ifdef CONFIG_IEEE80211_DEBUG
if (crypt && !encrypt && ether_type == ETH_P_PAE) {
struct eapol *eap = (struct eapol *)(skb->data +
sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16));
IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n",
eap_get_type(eap->type));
}
#endif
/* Save source and destination addresses */
memcpy(&dest, skb->data, ETH_ALEN);
memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN);
/* Advance the SKB to the start of the payload */
skb_pull(skb, sizeof(struct ethhdr));
/* Determine total amount of storage required for TXB packets */
bytes = skb->len + SNAP_SIZE + sizeof(u16);
if (encrypt)
fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP;
else
fc = IEEE80211_FTYPE_DATA;
//if(ieee->current_network.QoS_Enable)
if(qos_actived)
fc |= IEEE80211_STYPE_QOS_DATA;
else
fc |= IEEE80211_STYPE_DATA;
if (ieee->iw_mode == IW_MODE_INFRA) {
fc |= IEEE80211_FCTL_TODS;
/* To DS: Addr1 = BSSID, Addr2 = SA,
* Addr3 = DA
*/
memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN);
memcpy(&header.addr2, &src, ETH_ALEN);
memcpy(&header.addr3, &dest, ETH_ALEN);
} else if (ieee->iw_mode == IW_MODE_ADHOC) {
/* not From/To DS: Addr1 = DA, Addr2 = SA,
* Addr3 = BSSID
*/
memcpy(&header.addr1, dest, ETH_ALEN);
memcpy(&header.addr2, src, ETH_ALEN);
memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN);
}
header.frame_ctl = cpu_to_le16(fc);
/* Determine fragmentation size based on destination (multicast
* and broadcast are not fragmented)
*/
if (is_multicast_ether_addr(header.addr1)) {
frag_size = MAX_FRAG_THRESHOLD;
qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
}
else {
frag_size = ieee->fts;//default:392
qos_ctl = 0;
}
//if (ieee->current_network.QoS_Enable)
if(qos_actived)
{
hdr_len = IEEE80211_3ADDR_LEN + 2;
skb->priority = ieee80211_classify(skb, &ieee->current_network);
qos_ctl |= skb->priority; //set in the ieee80211_classify
header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID);
} else {
hdr_len = IEEE80211_3ADDR_LEN;
}
/* Determine amount of payload per fragment. Regardless of if
* this stack is providing the full 802.11 header, one will
* eventually be affixed to this fragment -- so we must account for
* it when determining the amount of payload space.
*/
bytes_per_frag = frag_size - hdr_len;
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
bytes_per_frag -= IEEE80211_FCS_LEN;
/* Each fragment may need to have room for encryption pre/postfix */
if (encrypt)
bytes_per_frag -= crypt->ops->extra_prefix_len +
crypt->ops->extra_postfix_len;
/* Number of fragments is the total bytes_per_frag /
* payload_per_fragment
*/
nr_frags = bytes / bytes_per_frag;
bytes_last_frag = bytes % bytes_per_frag;
if (bytes_last_frag)
nr_frags++;
else
bytes_last_frag = bytes_per_frag;
/* When we allocate the TXB we allocate enough space for the reserve
* and full fragment bytes (bytes_per_frag doesn't include prefix,
* postfix, header, FCS, etc.)
*/
txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC);
if (unlikely(!txb)) {
printk(KERN_WARNING "%s: Could not allocate TXB\n",
ieee->dev->name);
goto failed;
}
txb->encrypted = encrypt;
txb->payload_size = __cpu_to_le16(bytes);
//if (ieee->current_network.QoS_Enable)
if(qos_actived)
{
txb->queue_index = UP2AC(skb->priority);
} else {
txb->queue_index = WME_AC_BK;
}
for (i = 0; i < nr_frags; i++) {
skb_frag = txb->fragments[i];
tcb_desc = (struct cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE);
if(qos_actived){
skb_frag->priority = skb->priority;//UP2AC(skb->priority);
tcb_desc->queue_index = UP2AC(skb->priority);
} else {
skb_frag->priority = WME_AC_BK;
tcb_desc->queue_index = WME_AC_BK;
}
skb_reserve(skb_frag, ieee->tx_headroom);
if (encrypt){
if (ieee->hwsec_active)
tcb_desc->bHwSec = 1;
else
tcb_desc->bHwSec = 0;
skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
}
else
{
tcb_desc->bHwSec = 0;
}
frag_hdr = (struct rtl_80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
memcpy(frag_hdr, &header, hdr_len);
/* If this is not the last fragment, then add the MOREFRAGS
* bit to the frame control
*/
if (i != nr_frags - 1) {
frag_hdr->frame_ctl = cpu_to_le16(
fc | IEEE80211_FCTL_MOREFRAGS);
bytes = bytes_per_frag;
} else {
/* The last fragment takes the remaining length */
bytes = bytes_last_frag;
}
//if(ieee->current_network.QoS_Enable)
if(qos_actived)
{
// add 1 only indicate to corresponding seq number control 2006/7/12
frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i);
} else {
frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
}
/* Put a SNAP header on the first fragment */
if (i == 0) {
ieee80211_put_snap(
skb_put(skb_frag, SNAP_SIZE + sizeof(u16)),
ether_type);
bytes -= SNAP_SIZE + sizeof(u16);
}
memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
/* Advance the SKB... */
skb_pull(skb, bytes);
/* Encryption routine will move the header forward in order
* to insert the IV between the header and the payload
*/
if (encrypt)
ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);
}
if(qos_actived)
{
if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
else
ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
} else {
if (ieee->seq_ctrl[0] == 0xFFF)
ieee->seq_ctrl[0] = 0;
else
ieee->seq_ctrl[0]++;
}
}else{
if (unlikely(skb->len < sizeof(struct rtl_80211_hdr_3addr))) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
ieee->dev->name, skb->len);
goto success;
}
txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
if(!txb){
printk(KERN_WARNING "%s: Could not allocate TXB\n",
ieee->dev->name);
goto failed;
}
txb->encrypted = 0;
txb->payload_size = __cpu_to_le16(skb->len);
memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len);
}
success:
//WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place.
if (txb)
{
struct cb_desc *tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
tcb_desc->bTxEnableFwCalcDur = 1;
if (is_multicast_ether_addr(header.addr1))
tcb_desc->bMulticast = 1;
if (is_broadcast_ether_addr(header.addr1))
tcb_desc->bBroadcast = 1;
ieee80211_txrate_selectmode(ieee, tcb_desc);
if (tcb_desc->bMulticast || tcb_desc->bBroadcast)
tcb_desc->data_rate = ieee->basic_rate;
else
//tcb_desc->data_rate = CURRENT_RATE(ieee->current_network.mode, ieee->rate, ieee->HTCurrentOperaRate);
tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate);
ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc);
ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc);
ieee80211_query_HTCapShortGI(ieee, tcb_desc);
ieee80211_query_BandwidthMode(ieee, tcb_desc);
ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]);
ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1);
// IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, txb->fragments[0]->data, txb->fragments[0]->len);
//IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, tcb_desc, sizeof(cb_desc));
}
spin_unlock_irqrestore(&ieee->lock, flags);
dev_kfree_skb_any(skb);
if (txb) {
if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){
ieee80211_softmac_xmit(txb, ieee);
}else{
if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
stats->tx_packets++;
stats->tx_bytes += __le16_to_cpu(txb->payload_size);
return 0;
}
ieee80211_txb_free(txb);
}
}
return 0;
failed:
spin_unlock_irqrestore(&ieee->lock, flags);
netif_stop_queue(dev);
stats->tx_errors++;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jerry Chuang | 1649 | 98.39% | 1 | 16.67% |
| Derek Robson | 9 | 0.54% | 1 | 16.67% |
| Colin Vidal | 9 | 0.54% | 1 | 16.67% |
| simran singhal | 4 | 0.24% | 1 | 16.67% |
| Paul Gortmaker | 4 | 0.24% | 1 | 16.67% |
| Justin P. Mattock | 1 | 0.06% | 1 | 16.67% |
| Total | 1676 | 100.00% | 6 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jerry Chuang | 3648 | 97.93% | 1 | 5.88% |
| Derek Robson | 13 | 0.35% | 1 | 5.88% |
| Colin Vidal | 12 | 0.32% | 1 | 5.88% |
| simran singhal | 10 | 0.27% | 1 | 5.88% |
| Paul Bolle | 10 | 0.27% | 1 | 5.88% |
| Paul Gortmaker | 8 | 0.21% | 1 | 5.88% |
| Teodora Baluta | 7 | 0.19% | 3 | 17.65% |
| Benoit Taine | 5 | 0.13% | 1 | 5.88% |
| Ksenija Stanojevic | 4 | 0.11% | 1 | 5.88% |
| Joe Perches | 2 | 0.05% | 2 | 11.76% |
| Luis de Bethencourt | 2 | 0.05% | 1 | 5.88% |
| Ana Rey Botello | 2 | 0.05% | 1 | 5.88% |
| Justin P. Mattock | 1 | 0.03% | 1 | 5.88% |
| Shraddha Barke | 1 | 0.03% | 1 | 5.88% |
| Total | 3725 | 100.00% | 17 | 100.00% |
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