//
// Description:
// Construct the ARP response packet to support ARP offload.
//
static void ConstructARPResponse(
PADAPTER padapter,
u8 *pframe,
u32 *pLength,
u8 *pIPAddress
)
{
struct rtw_ieee80211_hdr *pwlanhdr;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
struct wlan_network *cur_network = &pmlmepriv->cur_network;
struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
struct security_priv *psecuritypriv = &padapter->securitypriv;
static u8 ARPLLCHeader[8] = {0xAA, 0xAA, 0x03, 0x00, 0x00, 0x00, 0x08, 0x06};
u16 *fctrl;
u32 pktlen;
u8 *pARPRspPkt = pframe;
//for TKIP Cal MIC
u8 *payload = pframe;
u8 EncryptionHeadOverhead = 0;
pwlanhdr = (struct rtw_ieee80211_hdr*)pframe;
fctrl = &pwlanhdr->frame_ctl;
*(fctrl) = 0;
//-------------------------------------------------------------------------
// MAC Header.
//-------------------------------------------------------------------------
SetFrameType(fctrl, WIFI_DATA);
//SetFrameSubType(fctrl, 0);
SetToDs(fctrl);
_rtw_memcpy(pwlanhdr->addr1, get_my_bssid(&(pmlmeinfo->network)), ETH_ALEN);
_rtw_memcpy(pwlanhdr->addr2, myid(&(padapter->eeprompriv)), ETH_ALEN);
_rtw_memcpy(pwlanhdr->addr3, get_my_bssid(&(pmlmeinfo->network)), ETH_ALEN);
SetSeqNum(pwlanhdr, 0);
SetDuration(pwlanhdr, 0);
//SET_80211_HDR_FRAME_CONTROL(pARPRspPkt, 0);
//SET_80211_HDR_TYPE_AND_SUBTYPE(pARPRspPkt, Type_Data);
//SET_80211_HDR_TO_DS(pARPRspPkt, 1);
//SET_80211_HDR_ADDRESS1(pARPRspPkt, pMgntInfo->Bssid);
//SET_80211_HDR_ADDRESS2(pARPRspPkt, Adapter->CurrentAddress);
//SET_80211_HDR_ADDRESS3(pARPRspPkt, pMgntInfo->Bssid);
//SET_80211_HDR_DURATION(pARPRspPkt, 0);
//SET_80211_HDR_FRAGMENT_SEQUENCE(pARPRspPkt, 0);
#ifdef CONFIG_WAPI_SUPPORT
*pLength = sMacHdrLng;
#else
*pLength = 24;
#endif
//YJ,del,120503
#if 0
//-------------------------------------------------------------------------
// Qos Header: leave space for it if necessary.
//-------------------------------------------------------------------------
if(pStaQos->CurrentQosMode > QOS_DISABLE)
{
SET_80211_HDR_QOS_EN(pARPRspPkt, 1);
PlatformZeroMemory(&(Buffer[*pLength]), sQoSCtlLng);
*pLength += sQoSCtlLng;
}
#endif
//-------------------------------------------------------------------------
// Security Header: leave space for it if necessary.
//-------------------------------------------------------------------------
switch (psecuritypriv->dot11PrivacyAlgrthm)
{
case _WEP40_:
case _WEP104_:
EncryptionHeadOverhead = 4;
break;
case _TKIP_:
EncryptionHeadOverhead = 8;
break;
case _AES_:
EncryptionHeadOverhead = 8;
break;
#ifdef CONFIG_WAPI_SUPPORT
case _SMS4_:
EncryptionHeadOverhead = 18;
break;
#endif
default:
EncryptionHeadOverhead = 0;
}
if(EncryptionHeadOverhead > 0)
{
_rtw_memset(&(pframe[*pLength]), 0,EncryptionHeadOverhead);
*pLength += EncryptionHeadOverhead;
//SET_80211_HDR_WEP(pARPRspPkt, 1); //Suggested by CCW.
SetPrivacy(fctrl);
}
//-------------------------------------------------------------------------
// Frame Body.
//-------------------------------------------------------------------------
pARPRspPkt = (u8*)(pframe+ *pLength);
// LLC header
_rtw_memcpy(pARPRspPkt, ARPLLCHeader, 8);
*pLength += 8;
// ARP element
pARPRspPkt += 8;
SET_ARP_PKT_HW(pARPRspPkt, 0x0100);
SET_ARP_PKT_PROTOCOL(pARPRspPkt, 0x0008); // IP protocol
SET_ARP_PKT_HW_ADDR_LEN(pARPRspPkt, 6);
SET_ARP_PKT_PROTOCOL_ADDR_LEN(pARPRspPkt, 4);
SET_ARP_PKT_OPERATION(pARPRspPkt, 0x0200); // ARP response
SET_ARP_PKT_SENDER_MAC_ADDR(pARPRspPkt, myid(&(padapter->eeprompriv)));
SET_ARP_PKT_SENDER_IP_ADDR(pARPRspPkt, pIPAddress);
#ifdef CONFIG_ARP_KEEP_ALIVE
if (rtw_gw_addr_query(padapter)==0) {
SET_ARP_PKT_TARGET_MAC_ADDR(pARPRspPkt, pmlmepriv->gw_mac_addr);
SET_ARP_PKT_TARGET_IP_ADDR(pARPRspPkt, pmlmepriv->gw_ip);
}
else
#endif
{
SET_ARP_PKT_TARGET_MAC_ADDR(pARPRspPkt, get_my_bssid(&(pmlmeinfo->network)));
SET_ARP_PKT_TARGET_IP_ADDR(pARPRspPkt, pIPAddress);
DBG_871X("%s Target Mac Addr:" MAC_FMT "\n", __FUNCTION__, MAC_ARG(get_my_bssid(&(pmlmeinfo->network))));
DBG_871X("%s Target IP Addr" IP_FMT "\n", __FUNCTION__, IP_ARG(pIPAddress));
}
*pLength += 28;
if (psecuritypriv->dot11PrivacyAlgrthm == _TKIP_)
{
u8 mic[8];
struct mic_data micdata;
struct sta_info *psta = NULL;
u8 priority[4]={0x0,0x0,0x0,0x0};
u8 null_key[16]={0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0};
DBG_871X("%s(): Add MIC\n",__FUNCTION__);
psta = rtw_get_stainfo(&padapter->stapriv, get_my_bssid(&(pmlmeinfo->network)));
if (psta != NULL) {
if(_rtw_memcmp(&psta->dot11tkiptxmickey.skey[0],null_key, 16)==_TRUE){
DBG_871X("%s(): STA dot11tkiptxmickey==0\n",__FUNCTION__);
}
//start to calculate the mic code
rtw_secmicsetkey(&micdata, &psta->dot11tkiptxmickey.skey[0]);
}
rtw_secmicappend(&micdata, pwlanhdr->addr3, 6); //DA
rtw_secmicappend(&micdata, pwlanhdr->addr2, 6); //SA
priority[0]=0;
rtw_secmicappend(&micdata, &priority[0], 4);
rtw_secmicappend(&micdata, payload, 36); //payload length = 8 + 28
rtw_secgetmic(&micdata,&(mic[0]));
pARPRspPkt += 28;
_rtw_memcpy(pARPRspPkt, &(mic[0]),8);
*pLength += 8;
}
}
static sint make_wlanhdr(struct _adapter *padapter, u8 *hdr,
struct pkt_attrib *pattrib)
{
u16 *qc;
struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
struct qos_priv *pqospriv = &pmlmepriv->qospriv;
__le16 *fctrl = &pwlanhdr->frame_ctl;
memset(hdr, 0, WLANHDR_OFFSET);
SetFrameSubType(fctrl, pattrib->subtype);
if (pattrib->subtype & WIFI_DATA_TYPE) {
if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
/* to_ds = 1, fr_ds = 0; */
SetToDs(fctrl);
memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
ETH_ALEN);
memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
/* to_ds = 0, fr_ds = 1; */
SetFrDs(fctrl);
memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
ETH_ALEN);
memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
} else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
check_fwstate(pmlmepriv,
WIFI_ADHOC_MASTER_STATE)) {
memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
ETH_ALEN);
} else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
ETH_ALEN);
} else {
return _FAIL;
}
if (pattrib->encrypt)
SetPrivacy(fctrl);
if (pqospriv->qos_option) {
qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
if (pattrib->priority)
SetPriority(qc, pattrib->priority);
SetAckpolicy(qc, pattrib->ack_policy);
}
/* TODO: fill HT Control Field */
/* Update Seq Num will be handled by f/w */
{
struct sta_info *psta;
sint bmcst = IS_MCAST(pattrib->ra);
if (pattrib->psta) {
psta = pattrib->psta;
} else {
if (bmcst)
psta = r8712_get_bcmc_stainfo(padapter);
else
psta =
r8712_get_stainfo(&padapter->stapriv,
pattrib->ra);
}
if (psta) {
psta->sta_xmitpriv.txseq_tid
[pattrib->priority]++;
psta->sta_xmitpriv.txseq_tid[pattrib->priority]
&= 0xFFF;
pattrib->seqnum = psta->sta_xmitpriv.
txseq_tid[pattrib->priority];
SetSeqNum(hdr, pattrib->seqnum);
}
}
}
return _SUCCESS;
}