// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
|
*
|
* Contact Information:
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* 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 "rtllib.h"
|
|
/* 802.11 Data Frame
|
*
|
*
|
* 802.11 frame_control 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 |DS | DS |frag| | mgm |data | |
|
* | | | x=1 data+ack | | | | | | | |
|
* '--------------------------------------------------------------------'
|
* /\
|
* |
|
* 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 int rtllib_put_snap(u8 *data, u16 h_proto)
|
{
|
struct rtllib_snap_hdr *snap;
|
u8 *oui;
|
|
snap = (struct rtllib_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];
|
|
*(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
|
|
return SNAP_SIZE + sizeof(u16);
|
}
|
|
int rtllib_encrypt_fragment(struct rtllib_device *ieee, struct sk_buff *frag,
|
int hdr_len)
|
{
|
struct lib80211_crypt_data *crypt = NULL;
|
int res;
|
|
crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
|
|
if (!(crypt && crypt->ops)) {
|
netdev_info(ieee->dev, "=========>%s(), crypt is null\n",
|
__func__);
|
return -1;
|
}
|
/* To encrypt, frame format is:
|
* IV (4 bytes), clear payload (including SNAP), ICV (4 bytes)
|
*/
|
|
/* 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) {
|
netdev_info(ieee->dev, "%s: Encryption failed: len=%d.\n",
|
ieee->dev->name, frag->len);
|
return -1;
|
}
|
|
return 0;
|
}
|
|
|
void rtllib_txb_free(struct rtllib_txb *txb)
|
{
|
if (unlikely(!txb))
|
return;
|
kfree(txb);
|
}
|
|
static struct rtllib_txb *rtllib_alloc_txb(int nr_frags, int txb_size,
|
gfp_t gfp_mask)
|
{
|
struct rtllib_txb *txb;
|
int i;
|
|
txb = kmalloc(sizeof(struct rtllib_txb) + (sizeof(u8 *) * nr_frags),
|
gfp_mask);
|
if (!txb)
|
return NULL;
|
|
memset(txb, 0, sizeof(struct rtllib_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;
|
}
|
|
static int rtllib_classify(struct sk_buff *skb, u8 bIsAmsdu)
|
{
|
struct ethhdr *eth;
|
struct iphdr *ip;
|
|
eth = (struct ethhdr *)skb->data;
|
if (eth->h_proto != htons(ETH_P_IP))
|
return 0;
|
|
#ifdef VERBOSE_DEBUG
|
print_hex_dump_bytes("%s: ", __func__, DUMP_PREFIX_NONE, skb->data,
|
skb->len);
|
#endif
|
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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|
static void rtllib_tx_query_agg_cap(struct rtllib_device *ieee,
|
struct sk_buff *skb,
|
struct cb_desc *tcb_desc)
|
{
|
struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
|
struct tx_ts_record *pTxTs = NULL;
|
struct rtllib_hdr_1addr *hdr = (struct rtllib_hdr_1addr *)skb->data;
|
|
if (rtllib_act_scanning(ieee, false))
|
return;
|
|
if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT)
|
return;
|
if (!IsQoSDataFrame(skb->data))
|
return;
|
if (is_multicast_ether_addr(hdr->addr1))
|
return;
|
|
if (tcb_desc->bdhcp || ieee->CntAfterLink < 2)
|
return;
|
|
if (pHTInfo->IOTAction & HT_IOT_ACT_TX_NO_AGGREGATION)
|
return;
|
|
if (!ieee->GetNmodeSupportBySecCfg(ieee->dev))
|
return;
|
if (pHTInfo->bCurrentAMPDUEnable) {
|
if (!GetTs(ieee, (struct ts_common_info **)(&pTxTs), hdr->addr1,
|
skb->priority, TX_DIR, true)) {
|
netdev_info(ieee->dev, "%s: can't get TS\n", __func__);
|
return;
|
}
|
if (pTxTs->TxAdmittedBARecord.bValid == false) {
|
if (ieee->wpa_ie_len && (ieee->pairwise_key_type ==
|
KEY_TYPE_NA)) {
|
;
|
} else if (tcb_desc->bdhcp == 1) {
|
;
|
} else if (!pTxTs->bDisable_AddBa) {
|
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;
|
}
|
}
|
|
static void rtllib_qurey_ShortPreambleMode(struct rtllib_device *ieee,
|
struct cb_desc *tcb_desc)
|
{
|
tcb_desc->bUseShortPreamble = false;
|
if (tcb_desc->data_rate == 2)
|
return;
|
else if (ieee->current_network.capability &
|
WLAN_CAPABILITY_SHORT_PREAMBLE)
|
tcb_desc->bUseShortPreamble = true;
|
}
|
|
static void rtllib_query_HTCapShortGI(struct rtllib_device *ieee,
|
struct cb_desc *tcb_desc)
|
{
|
struct rt_hi_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;
|
}
|
|
static void rtllib_query_BandwidthMode(struct rtllib_device *ieee,
|
struct cb_desc *tcb_desc)
|
{
|
struct rt_hi_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)
|
return;
|
if (pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz &&
|
!ieee->bandwidth_auto_switch.bforced_tx20Mhz)
|
tcb_desc->bPacketBW = true;
|
}
|
|
static void rtllib_query_protectionmode(struct rtllib_device *ieee,
|
struct cb_desc *tcb_desc,
|
struct sk_buff *skb)
|
{
|
struct rt_hi_throughput *pHTInfo;
|
|
tcb_desc->bRTSSTBC = false;
|
tcb_desc->bRTSUseShortGI = false;
|
tcb_desc->bCTSEnable = false;
|
tcb_desc->RTSSC = 0;
|
tcb_desc->bRTSBW = false;
|
|
if (tcb_desc->bBroadcast || tcb_desc->bMulticast)
|
return;
|
|
if (is_broadcast_ether_addr(skb->data+16))
|
return;
|
|
if (ieee->mode < IEEE_N_24G) {
|
if (skb->len > ieee->rts) {
|
tcb_desc->bRTSEnable = true;
|
tcb_desc->rts_rate = MGN_24M;
|
} else if (ieee->current_network.buseprotection) {
|
tcb_desc->bRTSEnable = true;
|
tcb_desc->bCTSEnable = true;
|
tcb_desc->rts_rate = MGN_24M;
|
}
|
return;
|
}
|
|
pHTInfo = ieee->pHTInfo;
|
|
while (true) {
|
if (pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF) {
|
tcb_desc->bCTSEnable = true;
|
tcb_desc->rts_rate = MGN_24M;
|
tcb_desc->bRTSEnable = true;
|
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;
|
}
|
if (ieee->current_network.buseprotection) {
|
tcb_desc->bRTSEnable = true;
|
tcb_desc->bCTSEnable = true;
|
tcb_desc->rts_rate = MGN_24M;
|
break;
|
}
|
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;
|
tcb_desc->bRTSEnable = true;
|
break;
|
}
|
}
|
if (skb->len > ieee->rts) {
|
tcb_desc->rts_rate = MGN_24M;
|
tcb_desc->bRTSEnable = true;
|
break;
|
}
|
if (tcb_desc->bAMPDUEnable) {
|
tcb_desc->rts_rate = MGN_24M;
|
tcb_desc->bRTSEnable = false;
|
break;
|
}
|
goto NO_PROTECTION;
|
}
|
if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
|
tcb_desc->bUseShortPreamble = true;
|
if (ieee->iw_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;
|
}
|
|
|
static void rtllib_txrate_selectmode(struct rtllib_device *ieee,
|
struct cb_desc *tcb_desc)
|
{
|
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;
|
}
|
}
|
|
static u16 rtllib_query_seqnum(struct rtllib_device *ieee, struct sk_buff *skb,
|
u8 *dst)
|
{
|
u16 seqnum = 0;
|
|
if (is_multicast_ether_addr(dst))
|
return 0;
|
if (IsQoSDataFrame(skb->data)) {
|
struct tx_ts_record *pTS = NULL;
|
|
if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst,
|
skb->priority, TX_DIR, true))
|
return 0;
|
seqnum = pTS->TxCurSeq;
|
pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
|
return seqnum;
|
}
|
return 0;
|
}
|
|
static int wme_downgrade_ac(struct sk_buff *skb)
|
{
|
switch (skb->priority) {
|
case 6:
|
case 7:
|
skb->priority = 5; /* VO -> VI */
|
return 0;
|
case 4:
|
case 5:
|
skb->priority = 3; /* VI -> BE */
|
return 0;
|
case 0:
|
case 3:
|
skb->priority = 1; /* BE -> BK */
|
return 0;
|
default:
|
return -1;
|
}
|
}
|
|
static u8 rtllib_current_rate(struct rtllib_device *ieee)
|
{
|
if (ieee->mode & IEEE_MODE_MASK)
|
return ieee->rate;
|
|
if (ieee->HTCurrentOperaRate)
|
return ieee->HTCurrentOperaRate;
|
else
|
return ieee->rate & 0x7F;
|
}
|
|
static int rtllib_xmit_inter(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct rtllib_device *ieee = (struct rtllib_device *)
|
netdev_priv_rsl(dev);
|
struct rtllib_txb *txb = NULL;
|
struct rtllib_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 rtllib_hdr_3addrqos header = { /* Ensure zero initialized */
|
.duration_id = 0,
|
.seq_ctl = 0,
|
.qos_ctl = 0
|
};
|
int qos_activated = ieee->current_network.qos_data.active;
|
u8 dest[ETH_ALEN];
|
u8 src[ETH_ALEN];
|
struct lib80211_crypt_data *crypt = NULL;
|
struct cb_desc *tcb_desc;
|
u8 bIsMulticast = false;
|
u8 IsAmsdu = false;
|
bool bdhcp = false;
|
|
spin_lock_irqsave(&ieee->lock, flags);
|
|
/* If there is no driver handler to take the TXB, don't 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)))) {
|
netdev_warn(ieee->dev, "No xmit handler.\n");
|
goto success;
|
}
|
|
|
if (likely(ieee->raw_tx == 0)) {
|
if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
|
netdev_warn(ieee->dev, "skb too small (%d).\n",
|
skb->len);
|
goto success;
|
}
|
/* Save source and destination addresses */
|
ether_addr_copy(dest, skb->data);
|
ether_addr_copy(src, skb->data + ETH_ALEN);
|
|
memset(skb->cb, 0, sizeof(skb->cb));
|
ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
|
|
if (ieee->iw_mode == IW_MODE_MONITOR) {
|
txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC);
|
if (unlikely(!txb)) {
|
netdev_warn(ieee->dev,
|
"Could not allocate TXB\n");
|
goto failed;
|
}
|
|
txb->encrypted = 0;
|
txb->payload_size = cpu_to_le16(skb->len);
|
skb_put_data(txb->fragments[0], skb->data, skb->len);
|
|
goto success;
|
}
|
|
if (skb->len > 282) {
|
if (ether_type == ETH_P_IP) {
|
const struct iphdr *ip = (struct iphdr *)
|
((u8 *)skb->data+14);
|
if (ip->protocol == IPPROTO_UDP) {
|
struct udphdr *udp;
|
|
udp = (struct udphdr *)((u8 *)ip +
|
(ip->ihl << 2));
|
if (((((u8 *)udp)[1] == 68) &&
|
(((u8 *)udp)[3] == 67)) ||
|
((((u8 *)udp)[1] == 67) &&
|
(((u8 *)udp)[3] == 68))) {
|
bdhcp = true;
|
ieee->LPSDelayCnt = 200;
|
}
|
}
|
} else if (ether_type == ETH_P_ARP) {
|
netdev_info(ieee->dev,
|
"=================>DHCP Protocol start tx ARP pkt!!\n");
|
bdhcp = true;
|
ieee->LPSDelayCnt =
|
ieee->current_network.tim.tim_count;
|
}
|
}
|
|
skb->priority = rtllib_classify(skb, IsAmsdu);
|
crypt = ieee->crypt_info.crypt[ieee->crypt_info.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;
|
}
|
if (crypt && !encrypt && ether_type == ETH_P_PAE) {
|
struct eapol *eap = (struct eapol *)(skb->data +
|
sizeof(struct ethhdr) - SNAP_SIZE -
|
sizeof(u16));
|
netdev_dbg(ieee->dev,
|
"TX: IEEE 802.11 EAPOL frame: %s\n",
|
eap_get_type(eap->type));
|
}
|
|
/* 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 = RTLLIB_FTYPE_DATA | RTLLIB_FCTL_WEP;
|
else
|
fc = RTLLIB_FTYPE_DATA;
|
|
if (qos_activated)
|
fc |= RTLLIB_STYPE_QOS_DATA;
|
else
|
fc |= RTLLIB_STYPE_DATA;
|
|
if (ieee->iw_mode == IW_MODE_INFRA) {
|
fc |= RTLLIB_FCTL_TODS;
|
/* To DS: Addr1 = BSSID, Addr2 = SA,
|
* Addr3 = DA
|
*/
|
ether_addr_copy(header.addr1,
|
ieee->current_network.bssid);
|
ether_addr_copy(header.addr2, src);
|
if (IsAmsdu)
|
ether_addr_copy(header.addr3,
|
ieee->current_network.bssid);
|
else
|
ether_addr_copy(header.addr3, dest);
|
} else if (ieee->iw_mode == IW_MODE_ADHOC) {
|
/* not From/To DS: Addr1 = DA, Addr2 = SA,
|
* Addr3 = BSSID
|
*/
|
ether_addr_copy(header.addr1, dest);
|
ether_addr_copy(header.addr2, src);
|
ether_addr_copy(header.addr3,
|
ieee->current_network.bssid);
|
}
|
|
bIsMulticast = is_multicast_ether_addr(header.addr1);
|
|
header.frame_ctl = cpu_to_le16(fc);
|
|
/* Determine fragmentation size based on destination (multicast
|
* and broadcast are not fragmented)
|
*/
|
if (bIsMulticast) {
|
frag_size = MAX_FRAG_THRESHOLD;
|
qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
|
} else {
|
frag_size = ieee->fts;
|
qos_ctl = 0;
|
}
|
|
if (qos_activated) {
|
hdr_len = RTLLIB_3ADDR_LEN + 2;
|
|
/* in case we are a client verify acm is not set for this ac */
|
while (unlikely(ieee->wmm_acm & (0x01 << skb->priority))) {
|
netdev_info(ieee->dev, "skb->priority = %x\n",
|
skb->priority);
|
if (wme_downgrade_ac(skb))
|
break;
|
netdev_info(ieee->dev, "converted skb->priority = %x\n",
|
skb->priority);
|
}
|
|
qos_ctl |= skb->priority;
|
header.qos_ctl = cpu_to_le16(qos_ctl & RTLLIB_QOS_TID);
|
|
} else {
|
hdr_len = RTLLIB_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_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS))
|
bytes_per_frag -= RTLLIB_FCS_LEN;
|
|
/* Each fragment may need to have room for encrypting
|
* pre/postfix
|
*/
|
if (encrypt) {
|
bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len +
|
crypt->ops->extra_mpdu_postfix_len +
|
crypt->ops->extra_msdu_prefix_len +
|
crypt->ops->extra_msdu_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 = rtllib_alloc_txb(nr_frags, frag_size +
|
ieee->tx_headroom, GFP_ATOMIC);
|
if (unlikely(!txb)) {
|
netdev_warn(ieee->dev, "Could not allocate TXB\n");
|
goto failed;
|
}
|
txb->encrypted = encrypt;
|
txb->payload_size = cpu_to_le16(bytes);
|
|
if (qos_activated)
|
txb->queue_index = UP2AC(skb->priority);
|
else
|
txb->queue_index = WME_AC_BE;
|
|
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_activated) {
|
skb_frag->priority = skb->priority;
|
tcb_desc->queue_index = UP2AC(skb->priority);
|
} else {
|
skb_frag->priority = WME_AC_BE;
|
tcb_desc->queue_index = WME_AC_BE;
|
}
|
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_mpdu_prefix_len +
|
crypt->ops->extra_msdu_prefix_len);
|
} else {
|
tcb_desc->bHwSec = 0;
|
}
|
frag_hdr = skb_put_data(skb_frag, &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 | RTLLIB_FCTL_MOREFRAGS);
|
bytes = bytes_per_frag;
|
|
} else {
|
/* The last fragment has the remaining length */
|
bytes = bytes_last_frag;
|
}
|
if ((qos_activated) && (!bIsMulticast)) {
|
frag_hdr->seq_ctl =
|
cpu_to_le16(rtllib_query_seqnum(ieee, skb_frag,
|
header.addr1));
|
frag_hdr->seq_ctl =
|
cpu_to_le16(le16_to_cpu(frag_hdr->seq_ctl)<<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) {
|
rtllib_put_snap(
|
skb_put(skb_frag, SNAP_SIZE +
|
sizeof(u16)), ether_type);
|
bytes -= SNAP_SIZE + sizeof(u16);
|
}
|
|
skb_put_data(skb_frag, 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)
|
rtllib_encrypt_fragment(ieee, skb_frag,
|
hdr_len);
|
if (ieee->config &
|
(CFG_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS))
|
skb_put(skb_frag, 4);
|
}
|
|
if ((qos_activated) && (!bIsMulticast)) {
|
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 rtllib_hdr_3addr))) {
|
netdev_warn(ieee->dev, "skb too small (%d).\n",
|
skb->len);
|
goto success;
|
}
|
|
txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC);
|
if (!txb) {
|
netdev_warn(ieee->dev, "Could not allocate TXB\n");
|
goto failed;
|
}
|
|
txb->encrypted = 0;
|
txb->payload_size = cpu_to_le16(skb->len);
|
skb_put_data(txb->fragments[0], skb->data, skb->len);
|
}
|
|
success:
|
if (txb) {
|
struct cb_desc *tcb_desc = (struct cb_desc *)
|
(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
|
tcb_desc->bTxEnableFwCalcDur = 1;
|
tcb_desc->priority = skb->priority;
|
|
if (ether_type == ETH_P_PAE) {
|
if (ieee->pHTInfo->IOTAction &
|
HT_IOT_ACT_WA_IOT_Broadcom) {
|
tcb_desc->data_rate =
|
MgntQuery_TxRateExcludeCCKRates(ieee);
|
tcb_desc->bTxDisableRateFallBack = false;
|
} else {
|
tcb_desc->data_rate = ieee->basic_rate;
|
tcb_desc->bTxDisableRateFallBack = 1;
|
}
|
|
|
tcb_desc->RATRIndex = 7;
|
tcb_desc->bTxUseDriverAssingedRate = 1;
|
} else {
|
if (is_multicast_ether_addr(header.addr1))
|
tcb_desc->bMulticast = 1;
|
if (is_broadcast_ether_addr(header.addr1))
|
tcb_desc->bBroadcast = 1;
|
rtllib_txrate_selectmode(ieee, tcb_desc);
|
if (tcb_desc->bMulticast || tcb_desc->bBroadcast)
|
tcb_desc->data_rate = ieee->basic_rate;
|
else
|
tcb_desc->data_rate = rtllib_current_rate(ieee);
|
|
if (bdhcp) {
|
if (ieee->pHTInfo->IOTAction &
|
HT_IOT_ACT_WA_IOT_Broadcom) {
|
tcb_desc->data_rate =
|
MgntQuery_TxRateExcludeCCKRates(ieee);
|
tcb_desc->bTxDisableRateFallBack = false;
|
} else {
|
tcb_desc->data_rate = MGN_1M;
|
tcb_desc->bTxDisableRateFallBack = 1;
|
}
|
|
|
tcb_desc->RATRIndex = 7;
|
tcb_desc->bTxUseDriverAssingedRate = 1;
|
tcb_desc->bdhcp = 1;
|
}
|
|
rtllib_qurey_ShortPreambleMode(ieee, tcb_desc);
|
rtllib_tx_query_agg_cap(ieee, txb->fragments[0],
|
tcb_desc);
|
rtllib_query_HTCapShortGI(ieee, tcb_desc);
|
rtllib_query_BandwidthMode(ieee, tcb_desc);
|
rtllib_query_protectionmode(ieee, tcb_desc,
|
txb->fragments[0]);
|
}
|
}
|
spin_unlock_irqrestore(&ieee->lock, flags);
|
dev_kfree_skb_any(skb);
|
if (txb) {
|
if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) {
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += le16_to_cpu(txb->payload_size);
|
rtllib_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;
|
}
|
rtllib_txb_free(txb);
|
}
|
}
|
|
return 0;
|
|
failed:
|
spin_unlock_irqrestore(&ieee->lock, flags);
|
netif_stop_queue(dev);
|
stats->tx_errors++;
|
return 1;
|
|
}
|
|
int rtllib_xmit(struct sk_buff *skb, struct net_device *dev)
|
{
|
memset(skb->cb, 0, sizeof(skb->cb));
|
return rtllib_xmit_inter(skb, dev);
|
}
|
EXPORT_SYMBOL(rtllib_xmit);
|
