diff options
Diffstat (limited to 'drivers/staging/rtl8192su/ieee80211/ieee80211_tx.c')
| -rw-r--r-- | drivers/staging/rtl8192su/ieee80211/ieee80211_tx.c | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/drivers/staging/rtl8192su/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8192su/ieee80211/ieee80211_tx.c new file mode 100644 index 000000000000..cba12b84be5c --- /dev/null +++ b/drivers/staging/rtl8192su/ieee80211/ieee80211_tx.c @@ -0,0 +1,948 @@ +/****************************************************************************** + + 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 <andreamrl@tiscali.it> + + A special thanks goes to Realtek for their support ! + +******************************************************************************/ + +#include <linux/compiler.h> +//#include <linux/config.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/version.h> +#include <linux/wireless.h> +#include <linux/etherdevice.h> +#include <asm/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); +} + +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", __FUNCTION__); + return -1; + } +#ifdef CONFIG_IEEE80211_CRYPT_TKIP + struct ieee80211_hdr *header; + + if (ieee->tkip_countermeasures && + crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { + header = (struct ieee80211_hdr *) frag->data; + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " + "TX packet to " MAC_FMT "\n", + ieee->dev->name, MAC_ARG(header->addr1)); + } + return -1; + } +#endif + /* 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; +} + + +void ieee80211_txb_free(struct ieee80211_txb *txb) { + //int i; + if (unlikely(!txb)) + return; +#if 0 + for (i = 0; i < txb->nr_frags; i++) + if (txb->fragments[i]) + dev_kfree_skb_any(txb->fragments[i]); +#endif + kfree(txb); +} + +struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, + int 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 = 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; +} + +// 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); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)) + ip = ip_hdr(skb); +#else + ip = (struct iphdr*)(skb->data + sizeof(struct ether_header)); +#endif + 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; + } +} + +#define SN_LESS(a, b) (((a-b)&0x800)!=0) +void ieee80211_tx_query_agg_cap(struct ieee80211_device* ieee, struct sk_buff* skb, cb_desc* tcb_desc) +{ + PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; + PTX_TS_RECORD pTxTs = NULL; + struct ieee80211_hdr_1addr* hdr = (struct ieee80211_hdr_1addr*)skb->data; + + if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT) + return; + if (!IsQoSDataFrame(skb->data)) + return; + + if (is_multicast_ether_addr(hdr->addr1) || is_broadcast_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(pHTInfo->IOTAction & HT_IOT_ACT_TX_NO_AGGREGATION) + return; + +#if 1 + if(!ieee->GetNmodeSupportBySecCfg(ieee->dev)) + { + return; + } +#endif + 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 == false) + { + //as some AP will refuse our action frame until key handshake has been finished. WB + if (ieee->wpa_ie_len && (ieee->pairwise_key_type == KEY_TYPE_NA)) + ; + else + TsStartAddBaProcess(ieee, pTxTs); + goto FORCED_AGG_SETTING; + } + else if (pTxTs->bUsingBa == false) + { + 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; +} + +extern void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device* ieee, 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; +} +extern void +ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, 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; +} + +void ieee80211_query_BandwidthMode(struct ieee80211_device* ieee, 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; +} + +void ieee80211_query_protectionmode(struct ieee80211_device* ieee, 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 IOT action + if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF) + { + tcb_desc->bCTSEnable = true; + tcb_desc->rts_rate = MGN_24M; +#if defined(RTL8192SE) || defined(RTL8192SU) + tcb_desc->bRTSEnable = false; +#else + tcb_desc->bRTSEnable = true; +#endif + break; + } + else if(pHTInfo->IOTAction & (HT_IOT_ACT_FORCED_RTS|HT_IOT_ACT_PURE_N_MODE)) + { + tcb_desc->bRTSEnable = true; + tcb_desc->rts_rate = MGN_24M; + break; + } + //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; + } + // 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; +} + + +void ieee80211_txrate_selectmode(struct ieee80211_device* ieee, 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; + } +} + +void ieee80211_query_seqnum(struct ieee80211_device*ieee, struct sk_buff* skb, u8* dst) +{ + if (is_multicast_ether_addr(dst) || is_broadcast_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; + } +} + +int rtl8192_ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) +{ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) + struct ieee80211_device *ieee = netdev_priv(dev); +#else + struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv; +#endif + struct ieee80211_txb *txb = NULL; + struct ieee80211_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 ieee80211_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; + + 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) || + is_broadcast_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 encryptiong 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 = 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 = (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 ieee80211_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 ieee80211_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 = 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) + { +#if 1 + cb_desc *tcb_desc = (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)); +#endif + } + 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 += 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; + +} +EXPORT_SYMBOL(rtl8192_ieee80211_xmit); + +EXPORT_SYMBOL(ieee80211_txb_free); |