Staging: add rt2870 wireless driver

This is the Ralink RT2870 driver from the company that does horrible
things like reading a config file from /etc.  However, the driver that
is currently under development from the wireless development community
is not working at all yet, so distros and users are using this version
instead (quite common hardware on a lot of netbook machines).

So here is this driver, for now, until the wireless developers get a
"clean" version into the main tree, or until this version is cleaned up
sufficiently to move out of the staging tree.

Ported to the Linux build system and cleaned up a bit already by me.

Cc: Linux wireless <linux-wireless@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 420 insertions, 0 deletions

diff --git a/drivers/staging/rt2870/sta/sanity.c b/drivers/staging/rt2870/sta/sanity.c
new file mode 100644
index 000000000000..239872464bed
--- /dev/null
+++ b/drivers/staging/rt2870/sta/sanity.c
@@ -0,0 +1,420 @@
+/*
+ *************************************************************************
+ * Ralink Tech Inc.
+ * 5F., No.36, Taiyuan St., Jhubei City,
+ * Hsinchu County 302,
+ * Taiwan, R.O.C.
+ *
+ * (c) Copyright 2002-2007, Ralink Technology, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation; either version 2 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * 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.             *
+ *                                                                       *
+ *************************************************************************
+
+	Module Name:
+	sanity.c
+
+	Abstract:
+
+	Revision History:
+	Who			When			What
+	--------	----------		----------------------------------------------
+	John Chang  2004-09-01      add WMM support
+*/
+#include "../rt_config.h"
+
+extern UCHAR	CISCO_OUI[];
+
+extern UCHAR	WPA_OUI[];
+extern UCHAR	RSN_OUI[];
+extern UCHAR	WME_INFO_ELEM[];
+extern UCHAR	WME_PARM_ELEM[];
+extern UCHAR	Ccx2QosInfo[];
+extern UCHAR	RALINK_OUI[];
+extern UCHAR	BROADCOM_OUI[];
+
+/*
+    ==========================================================================
+    Description:
+        MLME message sanity check
+    Return:
+        TRUE if all parameters are OK, FALSE otherwise
+    ==========================================================================
+ */
+BOOLEAN MlmeStartReqSanity(
+    IN PRTMP_ADAPTER pAd,
+    IN VOID *Msg,
+    IN ULONG MsgLen,
+    OUT CHAR Ssid[],
+    OUT UCHAR *pSsidLen)
+{
+    MLME_START_REQ_STRUCT *Info;
+
+    Info = (MLME_START_REQ_STRUCT *)(Msg);
+
+    if (Info->SsidLen > MAX_LEN_OF_SSID)
+    {
+        DBGPRINT(RT_DEBUG_TRACE, ("MlmeStartReqSanity fail - wrong SSID length\n"));
+        return FALSE;
+    }
+
+    *pSsidLen = Info->SsidLen;
+    NdisMoveMemory(Ssid, Info->Ssid, *pSsidLen);
+
+    return TRUE;
+}
+
+/*
+    ==========================================================================
+    Description:
+        MLME message sanity check
+    Return:
+        TRUE if all parameters are OK, FALSE otherwise
+
+    IRQL = DISPATCH_LEVEL
+
+    ==========================================================================
+ */
+BOOLEAN PeerAssocRspSanity(
+    IN PRTMP_ADAPTER pAd,
+    IN VOID *pMsg,
+    IN ULONG MsgLen,
+    OUT PUCHAR pAddr2,
+    OUT USHORT *pCapabilityInfo,
+    OUT USHORT *pStatus,
+    OUT USHORT *pAid,
+    OUT UCHAR SupRate[],
+    OUT UCHAR *pSupRateLen,
+    OUT UCHAR ExtRate[],
+    OUT UCHAR *pExtRateLen,
+    OUT HT_CAPABILITY_IE		*pHtCapability,
+    OUT ADD_HT_INFO_IE		*pAddHtInfo,	// AP might use this additional ht info IE
+    OUT UCHAR			*pHtCapabilityLen,
+    OUT UCHAR			*pAddHtInfoLen,
+    OUT UCHAR			*pNewExtChannelOffset,
+    OUT PEDCA_PARM pEdcaParm,
+    OUT UCHAR *pCkipFlag)
+{
+    CHAR          IeType, *Ptr;
+    PFRAME_802_11 pFrame = (PFRAME_802_11)pMsg;
+    PEID_STRUCT   pEid;
+    ULONG         Length = 0;
+
+	*pNewExtChannelOffset = 0xff;
+	*pHtCapabilityLen = 0;
+	*pAddHtInfoLen = 0;
+    COPY_MAC_ADDR(pAddr2, pFrame->Hdr.Addr2);
+    Ptr = pFrame->Octet;
+    Length += LENGTH_802_11;
+
+    NdisMoveMemory(pCapabilityInfo, &pFrame->Octet[0], 2);
+    Length += 2;
+    NdisMoveMemory(pStatus,         &pFrame->Octet[2], 2);
+    Length += 2;
+    *pCkipFlag = 0;
+    *pExtRateLen = 0;
+    pEdcaParm->bValid = FALSE;
+
+    if (*pStatus != MLME_SUCCESS)
+        return TRUE;
+
+    NdisMoveMemory(pAid, &pFrame->Octet[4], 2);
+    Length += 2;
+
+    // Aid already swaped byte order in RTMPFrameEndianChange() for big endian platform
+    *pAid = (*pAid) & 0x3fff; // AID is low 14-bit
+
+    // -- get supported rates from payload and advance the pointer
+    IeType = pFrame->Octet[6];
+    *pSupRateLen = pFrame->Octet[7];
+    if ((IeType != IE_SUPP_RATES) || (*pSupRateLen > MAX_LEN_OF_SUPPORTED_RATES))
+    {
+        DBGPRINT(RT_DEBUG_TRACE, ("PeerAssocRspSanity fail - wrong SupportedRates IE\n"));
+        return FALSE;
+    }
+    else
+        NdisMoveMemory(SupRate, &pFrame->Octet[8], *pSupRateLen);
+
+    Length = Length + 2 + *pSupRateLen;
+
+    // many AP implement proprietary IEs in non-standard order, we'd better
+    // tolerate mis-ordered IEs to get best compatibility
+    pEid = (PEID_STRUCT) &pFrame->Octet[8 + (*pSupRateLen)];
+
+    // get variable fields from payload and advance the pointer
+    while ((Length + 2 + pEid->Len) <= MsgLen)
+    {
+        switch (pEid->Eid)
+        {
+            case IE_EXT_SUPP_RATES:
+                if (pEid->Len <= MAX_LEN_OF_SUPPORTED_RATES)
+                {
+                    NdisMoveMemory(ExtRate, pEid->Octet, pEid->Len);
+                    *pExtRateLen = pEid->Len;
+                }
+                break;
+
+             case IE_HT_CAP:
+            case IE_HT_CAP2:
+			if (pEid->Len >= SIZE_HT_CAP_IE)  //Note: allow extension.!!
+			{
+				NdisMoveMemory(pHtCapability, pEid->Octet, SIZE_HT_CAP_IE);
+
+				*(USHORT *)(&pHtCapability->HtCapInfo) = cpu2le16(*(USHORT *)(&pHtCapability->HtCapInfo));
+				*(USHORT *)(&pHtCapability->ExtHtCapInfo) = cpu2le16(*(USHORT *)(&pHtCapability->ExtHtCapInfo));
+
+				*pHtCapabilityLen = SIZE_HT_CAP_IE;
+			}
+			else
+			{
+				DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_HT_CAP. \n"));
+			}
+
+		break;
+#ifdef DOT11_N_SUPPORT
+            case IE_ADD_HT:
+            case IE_ADD_HT2:
+			if (pEid->Len >= sizeof(ADD_HT_INFO_IE))
+			{
+				// This IE allows extension, but we can ignore extra bytes beyond our knowledge , so only
+				// copy first sizeof(ADD_HT_INFO_IE)
+				NdisMoveMemory(pAddHtInfo, pEid->Octet, sizeof(ADD_HT_INFO_IE));
+
+				*(USHORT *)(&pAddHtInfo->AddHtInfo2) = cpu2le16(*(USHORT *)(&pAddHtInfo->AddHtInfo2));
+				*(USHORT *)(&pAddHtInfo->AddHtInfo3) = cpu2le16(*(USHORT *)(&pAddHtInfo->AddHtInfo3));
+
+				*pAddHtInfoLen = SIZE_ADD_HT_INFO_IE;
+			}
+			else
+			{
+				DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_ADD_HT. \n"));
+			}
+
+		break;
+            case IE_SECONDARY_CH_OFFSET:
+			if (pEid->Len == 1)
+			{
+				*pNewExtChannelOffset = pEid->Octet[0];
+			}
+			else
+			{
+				DBGPRINT(RT_DEBUG_WARN, ("PeerAssocRspSanity - wrong IE_SECONDARY_CH_OFFSET. \n"));
+			}
+#endif // DOT11_N_SUPPORT //
+		break;
+            case IE_AIRONET_CKIP:
+                // 0. Check Aironet IE length, it must be larger or equal to 28
+                //    Cisco's AP VxWork version(will not be supported) used this IE length as 28
+                //    Cisco's AP IOS version used this IE length as 30
+                if (pEid->Len < (CKIP_NEGOTIATION_LENGTH - 2))
+                break;
+
+                // 1. Copy CKIP flag byte to buffer for process
+                *pCkipFlag = *(pEid->Octet + 8);
+                break;
+
+            case IE_AIRONET_IPADDRESS:
+                if (pEid->Len != 0x0A)
+                break;
+
+                // Get Cisco Aironet IP information
+                if (NdisEqualMemory(pEid->Octet, CISCO_OUI, 3) == 1)
+                    NdisMoveMemory(pAd->StaCfg.AironetIPAddress, pEid->Octet + 4, 4);
+                break;
+
+            // CCX2, WMM use the same IE value
+            // case IE_CCX_V2:
+            case IE_VENDOR_SPECIFIC:
+                // handle WME PARAMTER ELEMENT
+                if (NdisEqualMemory(pEid->Octet, WME_PARM_ELEM, 6) && (pEid->Len == 24))
+                {
+                    PUCHAR ptr;
+                    int i;
+
+                    // parsing EDCA parameters
+                    pEdcaParm->bValid          = TRUE;
+                    pEdcaParm->bQAck           = FALSE; // pEid->Octet[0] & 0x10;
+                    pEdcaParm->bQueueRequest   = FALSE; // pEid->Octet[0] & 0x20;
+                    pEdcaParm->bTxopRequest    = FALSE; // pEid->Octet[0] & 0x40;
+                    //pEdcaParm->bMoreDataAck    = FALSE; // pEid->Octet[0] & 0x80;
+                    pEdcaParm->EdcaUpdateCount = pEid->Octet[6] & 0x0f;
+                    pEdcaParm->bAPSDCapable    = (pEid->Octet[6] & 0x80) ? 1 : 0;
+                    ptr = &pEid->Octet[8];
+                    for (i=0; i<4; i++)
+                    {
+                        UCHAR aci = (*ptr & 0x60) >> 5; // b5~6 is AC INDEX
+                        pEdcaParm->bACM[aci]  = (((*ptr) & 0x10) == 0x10);   // b5 is ACM
+                        pEdcaParm->Aifsn[aci] = (*ptr) & 0x0f;               // b0~3 is AIFSN
+                        pEdcaParm->Cwmin[aci] = *(ptr+1) & 0x0f;             // b0~4 is Cwmin
+                        pEdcaParm->Cwmax[aci] = *(ptr+1) >> 4;               // b5~8 is Cwmax
+                        pEdcaParm->Txop[aci]  = *(ptr+2) + 256 * (*(ptr+3)); // in unit of 32-us
+                        ptr += 4; // point to next AC
+                    }
+                }
+
+                // handle CCX IE
+                else
+                {
+                    // 0. Check the size and CCX admin control
+                    if (pAd->StaCfg.CCXControl.field.Enable == 0)
+                        break;
+                    if (pEid->Len != 5)
+                        break;
+
+                    // Turn CCX2 if matched
+                    if (NdisEqualMemory(pEid->Octet, Ccx2IeInfo, 5) == 1)
+                        pAd->StaCfg.CCXEnable = TRUE;
+                    break;
+                }
+                break;
+
+            default:
+                DBGPRINT(RT_DEBUG_TRACE, ("PeerAssocRspSanity - ignore unrecognized EID = %d\n", pEid->Eid));
+                break;
+        }
+
+        Length = Length + 2 + pEid->Len;
+        pEid = (PEID_STRUCT)((UCHAR*)pEid + 2 + pEid->Len);
+    }
+
+    // Force CCX2 enable to TRUE for those AP didn't replay CCX v2 IE, we still force it to be on
+    if (pAd->StaCfg.CCXControl.field.Enable == 1)
+        pAd->StaCfg.CCXEnable = TRUE;
+
+    return TRUE;
+}
+
+/*
+    ==========================================================================
+    Description:
+        MLME message sanity check
+    Return:
+        TRUE if all parameters are OK, FALSE otherwise
+
+	IRQL = DISPATCH_LEVEL
+
+    ==========================================================================
+ */
+BOOLEAN PeerProbeReqSanity(
+    IN PRTMP_ADAPTER pAd,
+    IN VOID *Msg,
+    IN ULONG MsgLen,
+    OUT PUCHAR pAddr2,
+    OUT CHAR Ssid[],
+    OUT UCHAR *pSsidLen)
+{
+    UCHAR         Idx;
+    UCHAR	      RateLen;
+    CHAR          IeType;
+    PFRAME_802_11 pFrame = (PFRAME_802_11)Msg;
+
+    COPY_MAC_ADDR(pAddr2, pFrame->Hdr.Addr2);
+
+    if ((pFrame->Octet[0] != IE_SSID) || (pFrame->Octet[1] > MAX_LEN_OF_SSID))
+    {
+        DBGPRINT(RT_DEBUG_TRACE, ("PeerProbeReqSanity fail - wrong SSID IE(Type=%d,Len=%d)\n",pFrame->Octet[0],pFrame->Octet[1]));
+        return FALSE;
+    }
+
+    *pSsidLen = pFrame->Octet[1];
+    NdisMoveMemory(Ssid, &pFrame->Octet[2], *pSsidLen);
+
+    Idx = *pSsidLen + 2;
+
+    // -- get supported rates from payload and advance the pointer
+    IeType = pFrame->Octet[Idx];
+    RateLen = pFrame->Octet[Idx + 1];
+    if (IeType != IE_SUPP_RATES)
+    {
+        DBGPRINT(RT_DEBUG_TRACE, ("PeerProbeReqSanity fail - wrong SupportRates IE(Type=%d,Len=%d)\n",pFrame->Octet[Idx],pFrame->Octet[Idx+1]));
+        return FALSE;
+    }
+    else
+    {
+        if ((pAd->CommonCfg.PhyMode == PHY_11G) && (RateLen < 8))
+            return (FALSE);
+    }
+
+    return TRUE;
+}
+
+/*
+    ==========================================================================
+    Description:
+
+	IRQL = DISPATCH_LEVEL
+
+    ==========================================================================
+ */
+BOOLEAN GetTimBit(
+    IN CHAR *Ptr,
+    IN USHORT Aid,
+    OUT UCHAR *TimLen,
+    OUT UCHAR *BcastFlag,
+    OUT UCHAR *DtimCount,
+    OUT UCHAR *DtimPeriod,
+    OUT UCHAR *MessageToMe)
+{
+    UCHAR          BitCntl, N1, N2, MyByte, MyBit;
+    CHAR          *IdxPtr;
+
+    IdxPtr = Ptr;
+
+    IdxPtr ++;
+    *TimLen = *IdxPtr;
+
+    // get DTIM Count from TIM element
+    IdxPtr ++;
+    *DtimCount = *IdxPtr;
+
+    // get DTIM Period from TIM element
+    IdxPtr++;
+    *DtimPeriod = *IdxPtr;
+
+    // get Bitmap Control from TIM element
+    IdxPtr++;
+    BitCntl = *IdxPtr;
+
+    if ((*DtimCount == 0) && (BitCntl & 0x01))
+        *BcastFlag = TRUE;
+    else
+        *BcastFlag = FALSE;
+
+    // Parse Partial Virtual Bitmap from TIM element
+    N1 = BitCntl & 0xfe;    // N1 is the first bitmap byte#
+    N2 = *TimLen - 4 + N1;  // N2 is the last bitmap byte#
+
+    if ((Aid < (N1 << 3)) || (Aid >= ((N2 + 1) << 3)))
+        *MessageToMe = FALSE;
+    else
+    {
+        MyByte = (Aid >> 3) - N1;                       // my byte position in the bitmap byte-stream
+        MyBit = Aid % 16 - ((MyByte & 0x01)? 8:0);
+
+        IdxPtr += (MyByte + 1);
+
+        //if (*IdxPtr)
+        //    DBGPRINT(RT_DEBUG_WARN, ("TIM bitmap = 0x%02x\n", *IdxPtr));
+
+        if (*IdxPtr & (0x01 << MyBit))
+            *MessageToMe = TRUE;
+        else
+            *MessageToMe = FALSE;
+    }
+
+    return TRUE;
+}
+