config.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS NDIS library
 * FILE:        ndis/config.c
 * PURPOSE:     NDIS Configuration Services
 * PROGRAMMERS: Vizzini (vizzini@plasmic.com)
 * REVISIONS:
 *     Vizzini 07-28-2003 Created
 * NOTES:
 *     - Resource tracking has to be implemented here because of the design of the NDIS API.
 *       Whenever a read operation is performed, the NDIS library allocates space and returns
 *       it.  A linked list is kept associated with every handle of the memory allocated to
 *       it.  When the handle is closed, the resources are systematically released.
 *     - The NDIS_HANDLE Configuraiton context is no longer a registry handle.  An opaque struct
 *       had to be created to allow for resource tracking.  This means that Miniports cannot just
 *       pass this NDIS_HANDLE to things like ZwQueryValueKey().  I don't thknk they do (they
 *       certainly should not), but it should be kept in mind.
 *         UPDATE:  I just found this in the NTDDK:
 *         NdisOpenProtocolConfiguration returns a handle for the
 *         HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\NICDriverInstance\Parameters\ProtocolName
 *         registry key.  XXX This is a problem.  Following that, the DDK instructs programmers
 *         to use NdisReadConfiguration and NdisWriteConfiguration.  No telling what the world's idiots
 *         have done with this.
 *     - I have tried to stick to the DDK's definition of what return values are possible, which
 *       has resulted in stupid return values in some cases.  I do use STATUS_RESOURCES in a few
 *       places that the DDK doesn't explicitly mention it, though.
 *     - There's a general reliance on the fact that UNICODE_STRING.Length doesn't include a trailing
 *       0, which it shouldn't
 *     - I added support for NdisParameterBinary.  It's at the end of the struct.  I wonder if
 *       it'll break things.
 *     - All the routines in this file are PASSIVE_LEVEL only, and all memory is PagedPool
 */

#include "ndissys.h"

#define PARAMETERS_KEY L"Parameters"     /* The parameters subkey under the device-specific key */

/*
 * @implemented
 */
VOID
EXPORT
NdisWriteConfiguration(
    OUT PNDIS_STATUS                    Status,
    IN  NDIS_HANDLE                     ConfigurationHandle,
    IN  PNDIS_STRING                    Keyword,
    IN  PNDIS_CONFIGURATION_PARAMETER   ParameterValue)
/*
 * FUNCTION: Writes a configuration value to the registry
 * ARGUMENTS:
 *     Status: Pointer to a caller-supplied NDIS_STATUS where we return status
 *     ConfigurationHandle: The Configuration Handle passed back from the call to one of the Open functions
 *     Keyword: The registry value name to write
 *     ParameterValue: The value data to write
 * RETURNS:
 *     NDIS_STATUS_SUCCESS - the operation completed successfully
 *     NDIS_STATUS_NOT_SUPPORTED - The parameter type is not supported
 *     NDIS_STATUS_RESOURCES - out of memory, etc.
 *     NDIS_STATUS_FAILURE - any other failure
 * NOTES:
 *    There's a cryptic comment in the ddk implying that this function allocates and keeps memory.
 *    I don't know why tho so i free everything before return.  comments welcome.
 */
{
    ULONG ParameterType;
    ULONG DataSize;
    PVOID Data;
    WCHAR Buff[11];

    NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
    
    NDIS_DbgPrint(MID_TRACE, ("Parameter type: %d\n", ParameterValue->ParameterType));

    /* reset parameter type to standard reg types */
    switch(ParameterValue->ParameterType)
    {
        case NdisParameterHexInteger:
        case NdisParameterInteger:
             {
                 UNICODE_STRING Str;

                 Str.Buffer = (PWSTR) &Buff;
                 Str.MaximumLength = (USHORT)sizeof(Buff);
                 Str.Length = 0;

                 ParameterType = REG_SZ;
                 if (!NT_SUCCESS(RtlIntegerToUnicodeString(
                      ParameterValue->ParameterData.IntegerData,
                      (ParameterValue->ParameterType == NdisParameterInteger) ? 10 : 16, &Str)))
                 {
                      NDIS_DbgPrint(MIN_TRACE, ("RtlIntegerToUnicodeString failed (%x)\n", *Status));
                      *Status = NDIS_STATUS_FAILURE;
                      return;
                 }
                 Data = Str.Buffer;
                 DataSize = Str.Length;
             }
             break;
        case NdisParameterString:
        case NdisParameterMultiString:
            ParameterType = (ParameterValue->ParameterType == NdisParameterString) ? REG_SZ : REG_MULTI_SZ;
            Data = ParameterValue->ParameterData.StringData.Buffer;
            DataSize = ParameterValue->ParameterData.StringData.Length;
            break;

        /* New (undocumented) addition to 2k ddk */
        case NdisParameterBinary:
            ParameterType = REG_BINARY;
            Data = ParameterValue->ParameterData.BinaryData.Buffer;
            DataSize = ParameterValue->ParameterData.BinaryData.Length;
            break;

        default:
            *Status = NDIS_STATUS_NOT_SUPPORTED;
            return;
    }

    *Status = ZwSetValueKey(((PMINIPORT_CONFIGURATION_CONTEXT)ConfigurationHandle)->Handle,
            Keyword, 0, ParameterType, Data, DataSize);

    if(*Status != STATUS_SUCCESS) {
        NDIS_DbgPrint(MIN_TRACE, ("ZwSetValueKey failed (%x)\n", *Status));
        *Status = NDIS_STATUS_FAILURE;
    } else
        *Status = NDIS_STATUS_SUCCESS;
}


/*
 * @implemented
 */
VOID
EXPORT
NdisCloseConfiguration(
    IN  NDIS_HANDLE ConfigurationHandle)
/*
 * FUNCTION: Closes handles and releases per-handle resources
 * ARGUMENTS:
 *     ConfigurationHandle - pointer to the context with the resources to free
 */
{
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext = (PMINIPORT_CONFIGURATION_CONTEXT)ConfigurationHandle;
    PMINIPORT_RESOURCE Resource;
    PNDIS_CONFIGURATION_PARAMETER ParameterValue;
    PLIST_ENTRY CurrentEntry;

    while((CurrentEntry = ExInterlockedRemoveHeadList(&ConfigurationContext->ResourceListHead,
                                                      &ConfigurationContext->ResourceLock)) != NULL)
    {
        Resource = CONTAINING_RECORD(CurrentEntry, MINIPORT_RESOURCE, ListEntry);
        switch(Resource->ResourceType)
        {
          case MINIPORT_RESOURCE_TYPE_REGISTRY_DATA:
            ParameterValue = Resource->Resource;

            switch (ParameterValue->ParameterType)
            {
               case NdisParameterBinary:
                 ExFreePool(ParameterValue->ParameterData.BinaryData.Buffer);
                 break;

               case NdisParameterString:
               case NdisParameterMultiString:
                 ExFreePool(ParameterValue->ParameterData.StringData.Buffer);
                 break;

               default:
                 break;
            }

          /* Fall through to free NDIS_CONFIGURATION_PARAMETER struct */

          case MINIPORT_RESOURCE_TYPE_MEMORY:
            NDIS_DbgPrint(MAX_TRACE,("freeing 0x%x\n", Resource->Resource));
            ExFreePool(Resource->Resource);
            break;

          default:
            NDIS_DbgPrint(MIN_TRACE,("Unknown resource type: %d\n", Resource->ResourceType));
            break;
        }

        ExFreePool(Resource);
    }

    ZwClose(ConfigurationContext->Handle);
}


/*
 * @implemented
 */
VOID
EXPORT
NdisOpenConfiguration(
    OUT PNDIS_STATUS    Status,
    OUT PNDIS_HANDLE    ConfigurationHandle,
    IN  NDIS_HANDLE     WrapperConfigurationContext)
/*
 * FUNCTION: Opens the configuration key and sets up resource tracking for the returned handle
 * ARGUMENTS:
 *     Status: Pointer to a caller-supplied NDIS_STATUS that is filled in with a return value
 *     ConfigurationHandle: Pointer to an opaque configuration handle returned on success
 *     WrapperConfigurationContext: handle originally passed back from NdisInitializeWrapper
 * RETURNS:
 *     NDIS_STATUS_SUCCESS: the operation completed successfully
 *     NDIS_STATUS_FAILURE: the operation failed
 * NOTES:
 *     I think this is the parameters key; please verify.
 */
{
    HANDLE KeyHandle;
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext;
    PNDIS_WRAPPER_CONTEXT WrapperContext = (PNDIS_WRAPPER_CONTEXT)WrapperConfigurationContext;
    HANDLE RootKeyHandle = WrapperContext->RegistryHandle;

    NDIS_DbgPrint(MAX_TRACE, ("Called\n"));

    *ConfigurationHandle = NULL;

    *Status = ZwDuplicateObject(NtCurrentProcess(), RootKeyHandle,
                                NtCurrentProcess(), &KeyHandle, 0, 0,
                                DUPLICATE_SAME_ACCESS);
    if(!NT_SUCCESS(*Status))
    {
        NDIS_DbgPrint(MIN_TRACE, ("Failed to open registry configuration for this miniport\n"));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    ConfigurationContext = ExAllocatePool(NonPagedPool, sizeof(MINIPORT_CONFIGURATION_CONTEXT));
    if(!ConfigurationContext)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        ZwClose(KeyHandle);
        *Status = NDIS_STATUS_RESOURCES;
        return;
    }

    KeInitializeSpinLock(&ConfigurationContext->ResourceLock);
    InitializeListHead(&ConfigurationContext->ResourceListHead);

    ConfigurationContext->Handle = KeyHandle;

    *ConfigurationHandle = (NDIS_HANDLE)ConfigurationContext;
    *Status = NDIS_STATUS_SUCCESS;

    NDIS_DbgPrint(MAX_TRACE,("returning success\n"));
}


/*
 * @implemented
 */
VOID
EXPORT
NdisOpenProtocolConfiguration(
    OUT PNDIS_STATUS    Status,
    OUT PNDIS_HANDLE    ConfigurationHandle,
    IN  PNDIS_STRING    ProtocolSection)
/*
 * FUNCTION: Open the configuration key and set up resource tracking for the protocol
 * ARGUMENTS:
 *     Status: caller-allocated buffer where status is returned
 *     ConfigurationHandle: spot to return the opaque configuration context
 *     ProtocolSection: configuration string originally passed in to ProtocolBindAdapter
 * RETURNS:
 *     NDIS_STATUS_SUCCESS: the operation was a success
 *     NDIS_STATUS_FAILURE: the operation was not a success
 * NOTES:
 *     I think this is the per-device (adapter) parameters\{ProtocolName} key; please verify.
 */
{
    OBJECT_ATTRIBUTES KeyAttributes;
    UNICODE_STRING KeyNameU;
    HANDLE KeyHandle;
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext;

    KeyNameU.Length = 0;
    KeyNameU.MaximumLength = ProtocolSection->Length + sizeof(PARAMETERS_KEY) + sizeof(UNICODE_NULL);
    KeyNameU.Buffer = ExAllocatePool(PagedPool, KeyNameU.MaximumLength);
    if(!KeyNameU.Buffer)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        *ConfigurationHandle = NULL;
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    RtlCopyUnicodeString(&KeyNameU, ProtocolSection);
    RtlAppendUnicodeToString(&KeyNameU, PARAMETERS_KEY);
    InitializeObjectAttributes(&KeyAttributes, &KeyNameU, OBJ_CASE_INSENSITIVE, NULL, NULL);

    *Status = ZwOpenKey(&KeyHandle, KEY_ALL_ACCESS, &KeyAttributes);

    ExFreePool(KeyNameU.Buffer);

    if(*Status != NDIS_STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MIN_TRACE, ("ZwOpenKey failed (%x)\n", *Status));
        *ConfigurationHandle = NULL;
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    ConfigurationContext = ExAllocatePool(NonPagedPool, sizeof(MINIPORT_CONFIGURATION_CONTEXT));
    if(!ConfigurationContext)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        ZwClose(KeyHandle);
        *ConfigurationHandle = NULL;
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    KeInitializeSpinLock(&ConfigurationContext->ResourceLock);
    InitializeListHead(&ConfigurationContext->ResourceListHead);

    ConfigurationContext->Handle = KeyHandle;

    *ConfigurationHandle = (NDIS_HANDLE)ConfigurationContext;
    *Status = NDIS_STATUS_SUCCESS;
}

UCHAR UnicodeToHexByte(WCHAR chr)
/*
 * FUNCTION: Converts a unicode hex character to its numerical value
 * ARGUMENTS:
 *     chr: Unicode character to convert
 * RETURNS:
 *     The numerical value of chr
 */
{
    switch(chr)
    {
        case L'0': return 0;
        case L'1': return 1;
        case L'2': return 2;
        case L'3': return 3;
        case L'4': return 4;
        case L'5': return 5;
        case L'6': return 6;
        case L'7': return 7;
        case L'8': return 8;
        case L'9': return 9;
        case L'A':
        case L'a':
            return 10;
        case L'B':
        case L'b':
            return 11;
        case L'C':
        case L'c':
            return 12;
        case L'D':
        case L'd':
            return 13;
        case L'E':
        case L'e':
            return 14;
        case L'F':
        case L'f':
            return 15;
    }
    return 0xFF;
}

BOOLEAN
IsValidNumericString(PNDIS_STRING String, ULONG Base)
/*
 * FUNCTION: Determines if a string is a valid number
 * ARGUMENTS:
 *     String: Unicode string to evaluate
 * RETURNS:
 *     TRUE if it is valid, FALSE if not
 */
{
    ULONG i;

    /* I don't think this will ever happen, but we warn it if it does */
    if (String->Length == 0)
    {
        NDIS_DbgPrint(MIN_TRACE, ("Got an empty string; not sure what to do here\n"));
        return FALSE;
    }

    for (i = 0; i < String->Length / sizeof(WCHAR); i++)
    {
        /* Skip any NULL characters we find */
        if (String->Buffer[i] == UNICODE_NULL)
            continue;

        /* Make sure the character is valid for a numeric string of this base */
        if (UnicodeToHexByte(String->Buffer[i]) >= Base)
            return FALSE;
    }

    /* It's valid */
    return TRUE;
}

/*
 * @implemented
 */
VOID
EXPORT
NdisReadConfiguration(
    OUT PNDIS_STATUS                    Status,
    OUT PNDIS_CONFIGURATION_PARAMETER   * ParameterValue,
    IN  NDIS_HANDLE                     ConfigurationHandle,
    IN  PNDIS_STRING                    Keyword,
    IN  NDIS_PARAMETER_TYPE             ParameterType)
/*
 * FUNCTION: Read a configuration value from the registry, tracking its resources
 * ARGUMENTS:
 *     Status: points to a place to write status into
 *     ParameterValue: Pointer to receive a newly-allocated parameter structure
 *     ConfigurationHandle: handle originally returned by an open function
 *     Keyword: Value name to read, or one of the following constants:
 *       Environment - returns NdisEnvironmentWindowsNt
 *       ProcessorType - returns NdisProcessorX86 until more architectures are added
 *       NdisVersion - returns NDIS_VERSION
 *     ParameterType: the type of the value to be queried
 * RETURNS:
 *     - A status in Status
 *     - A parameter value in ParameterValue
 */
{
    KEY_VALUE_PARTIAL_INFORMATION *KeyInformation;
    ULONG KeyDataLength;
    PMINIPORT_RESOURCE MiniportResource;
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext = (PMINIPORT_CONFIGURATION_CONTEXT)ConfigurationHandle;
    PVOID Buffer;

    *ParameterValue = NULL;
    *Status = NDIS_STATUS_FAILURE;

    NDIS_DbgPrint(MAX_TRACE,("requested read of %wZ\n", Keyword));
    NDIS_DbgPrint(MID_TRACE,("requested parameter type: %d\n", ParameterType));

    if (ConfigurationContext == NULL)
    {
       NDIS_DbgPrint(MIN_TRACE,("invalid parameter ConfigurationContext (0x%x)\n",ConfigurationContext));
       return;
    }

    if(!wcsncmp(Keyword->Buffer, L"Environment", Keyword->Length/sizeof(WCHAR)) &&
        wcslen(L"Environment") == Keyword->Length/sizeof(WCHAR))
    {
        *ParameterValue = ExAllocatePool(PagedPool, sizeof(NDIS_CONFIGURATION_PARAMETER));
        if(!*ParameterValue)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource = ExAllocatePool(PagedPool, sizeof(MINIPORT_RESOURCE));
        if(!MiniportResource)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            ExFreePool(*ParameterValue);
            *ParameterValue = NULL;
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource->ResourceType = MINIPORT_RESOURCE_TYPE_REGISTRY_DATA;
        MiniportResource->Resource = *ParameterValue;

        NDIS_DbgPrint(MID_TRACE,("inserting 0x%x into the resource list\n",
            MiniportResource->Resource));

        ExInterlockedInsertTailList(&ConfigurationContext->ResourceListHead,
            &MiniportResource->ListEntry, &ConfigurationContext->ResourceLock);

        (*ParameterValue)->ParameterType = NdisParameterInteger;
        (*ParameterValue)->ParameterData.IntegerData = NdisEnvironmentWindowsNt;
        *Status = NDIS_STATUS_SUCCESS;

        return;
    }

    if(!wcsncmp(Keyword->Buffer, L"ProcessorType", Keyword->Length/sizeof(WCHAR)) &&
        wcslen(L"ProcessorType") == Keyword->Length/sizeof(WCHAR))
    {
        *ParameterValue = ExAllocatePool(PagedPool, sizeof(NDIS_CONFIGURATION_PARAMETER));
        if(!*ParameterValue)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource = ExAllocatePool(PagedPool, sizeof(MINIPORT_RESOURCE));
        if(!MiniportResource)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            ExFreePool(*ParameterValue);
            *ParameterValue = NULL;
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource->ResourceType = MINIPORT_RESOURCE_TYPE_REGISTRY_DATA;
        MiniportResource->Resource = *ParameterValue;
        NDIS_DbgPrint(MID_TRACE,("inserting 0x%x into the resource list\n", MiniportResource->Resource));
        ExInterlockedInsertTailList(&ConfigurationContext->ResourceListHead,
            &MiniportResource->ListEntry, &ConfigurationContext->ResourceLock);

        (*ParameterValue)->ParameterType = NdisParameterInteger;
        (*ParameterValue)->ParameterData.IntegerData = NdisProcessorX86;    /* XXX non-portable */
        *Status = NDIS_STATUS_SUCCESS;

        return;
    }

    if(!wcsncmp(Keyword->Buffer, L"NdisVersion", Keyword->Length/sizeof(WCHAR)) &&
        wcslen(L"NdisVersion") == Keyword->Length/sizeof(WCHAR))
    {
        *ParameterValue = ExAllocatePool(PagedPool, sizeof(NDIS_CONFIGURATION_PARAMETER));
        if(!*ParameterValue)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource = ExAllocatePool(PagedPool, sizeof(MINIPORT_RESOURCE));
        if(!MiniportResource)
        {
            NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
            ExFreePool(*ParameterValue);
            *ParameterValue = NULL;
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        MiniportResource->ResourceType = MINIPORT_RESOURCE_TYPE_REGISTRY_DATA;
        MiniportResource->Resource = *ParameterValue;
        NDIS_DbgPrint(MID_TRACE,("inserting 0x%x into the resource list\n", MiniportResource->Resource));
        ExInterlockedInsertTailList(&ConfigurationContext->ResourceListHead,
            &MiniportResource->ListEntry, &ConfigurationContext->ResourceLock);

        (*ParameterValue)->ParameterType = NdisParameterInteger;
        (*ParameterValue)->ParameterData.IntegerData = NDIS_VERSION;
        *Status = NDIS_STATUS_SUCCESS;

        NDIS_DbgPrint(MAX_TRACE,("ParameterType = %0x%x, ParameterValue = 0x%x\n",
            (*ParameterValue)->ParameterType, (*ParameterValue)->ParameterData.IntegerData));
        return;
    }

    /* figure out how much buffer i should allocate */
    *Status = ZwQueryValueKey(ConfigurationContext->Handle, Keyword, KeyValuePartialInformation, NULL, 0, &KeyDataLength);
    if(*Status != STATUS_BUFFER_OVERFLOW && *Status != STATUS_BUFFER_TOO_SMALL && *Status != STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MID_TRACE,("ZwQueryValueKey #1 failed for %wZ, status 0x%x\n", Keyword, *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    /* allocate it */
    KeyInformation = ExAllocatePool(PagedPool, KeyDataLength + sizeof(KEY_VALUE_PARTIAL_INFORMATION));
    if(!KeyInformation)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        *Status = NDIS_STATUS_RESOURCES;
        return;
    }

    /* grab the value */
    *Status = ZwQueryValueKey(ConfigurationContext->Handle, Keyword, KeyValuePartialInformation,
        KeyInformation, KeyDataLength + sizeof(KEY_VALUE_PARTIAL_INFORMATION), &KeyDataLength);
    if(*Status != STATUS_SUCCESS)
    {
        ExFreePool(KeyInformation);
        NDIS_DbgPrint(MIN_TRACE,("ZwQueryValueKey #2 failed for %wZ, status 0x%x\n", Keyword, *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    MiniportResource = ExAllocatePool(PagedPool, sizeof(MINIPORT_RESOURCE));
    if(!MiniportResource)
    {
       NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
       ExFreePool(KeyInformation);
       *Status = NDIS_STATUS_RESOURCES;
       return;
    }

    *ParameterValue = ExAllocatePool(PagedPool, sizeof(NDIS_CONFIGURATION_PARAMETER));
    if (!*ParameterValue)
    {
        NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
        ExFreePool(MiniportResource);
        ExFreePool(KeyInformation);
        *Status = NDIS_STATUS_RESOURCES;
        return;
    }

    RtlZeroMemory(*ParameterValue, sizeof(NDIS_CONFIGURATION_PARAMETER));

    if (KeyInformation->Type == REG_BINARY)
    {
        NDIS_DbgPrint(MAX_TRACE, ("NdisParameterBinary\n"));

        (*ParameterValue)->ParameterType = NdisParameterBinary;

        Buffer = ExAllocatePool(PagedPool, KeyInformation->DataLength);
        if (!Buffer)
        {
            NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
            ExFreePool(MiniportResource);
            ExFreePool(KeyInformation);
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        RtlCopyMemory(Buffer, KeyInformation->Data, KeyInformation->DataLength);

        (*ParameterValue)->ParameterData.BinaryData.Buffer = Buffer;
        (*ParameterValue)->ParameterData.BinaryData.Length = KeyInformation->DataLength;
    }
    else if (KeyInformation->Type == REG_MULTI_SZ)
    {
        NDIS_DbgPrint(MAX_TRACE, ("NdisParameterMultiString\n"));

        (*ParameterValue)->ParameterType = NdisParameterMultiString;

        Buffer = ExAllocatePool(PagedPool, KeyInformation->DataLength);
        if (!Buffer)
        {
            NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
            ExFreePool(MiniportResource);
            ExFreePool(KeyInformation);
            *Status = NDIS_STATUS_RESOURCES;
            return;
        }

        RtlCopyMemory(Buffer, KeyInformation->Data, KeyInformation->DataLength);

        (*ParameterValue)->ParameterData.StringData.Buffer = Buffer;
        (*ParameterValue)->ParameterData.StringData.Length = KeyInformation->DataLength;
    }
    else if (KeyInformation->Type == REG_SZ)
    {
         UNICODE_STRING str;
         ULONG Base;
        
         if (ParameterType == NdisParameterInteger)
             Base = 10;
         else if (ParameterType == NdisParameterHexInteger)
             Base = 16;
         else
             Base = 0;

         str.Length = str.MaximumLength = (USHORT)KeyInformation->DataLength;
         str.Buffer = (PWCHAR)KeyInformation->Data;

         if (Base != 0 && IsValidNumericString(&str, Base) &&
             ((*Status = RtlUnicodeStringToInteger(&str, Base,
                             &(*ParameterValue)->ParameterData.IntegerData)) == STATUS_SUCCESS))
         {
             NDIS_DbgPrint(MAX_TRACE, ("NdisParameter(Hex)Integer\n"));

             (*ParameterValue)->ParameterType = ParameterType;
         }
         else
         {
             NDIS_DbgPrint(MAX_TRACE, ("NdisParameterString\n"));

             (*ParameterValue)->ParameterType = NdisParameterString;

             Buffer = ExAllocatePool(PagedPool, KeyInformation->DataLength);
             if (!Buffer)
             {
                 NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources.\n"));
                 ExFreePool(MiniportResource);
                 ExFreePool(KeyInformation);
                 *Status = NDIS_STATUS_RESOURCES;
                 return;
             }

             RtlCopyMemory(Buffer, KeyInformation->Data, KeyInformation->DataLength);

             (*ParameterValue)->ParameterData.StringData.Buffer = Buffer;
             (*ParameterValue)->ParameterData.StringData.Length = KeyInformation->DataLength;
         }
    }
    else
    {
        NDIS_DbgPrint(MIN_TRACE, ("Invalid type for NdisReadConfiguration (%d)\n", KeyInformation->Type));
        NDIS_DbgPrint(MIN_TRACE, ("Requested type: %d\n", ParameterType));
        NDIS_DbgPrint(MIN_TRACE, ("Registry entry: %wZ\n", Keyword));
        *Status = NDIS_STATUS_FAILURE;
        ExFreePool(KeyInformation);
        return;
    }
    
    if ((*ParameterValue)->ParameterType != ParameterType)
    {
        NDIS_DbgPrint(MIN_TRACE, ("Parameter type mismatch! (Requested: %d | Received: %d)\n",
                                  ParameterType, (*ParameterValue)->ParameterType));
        NDIS_DbgPrint(MIN_TRACE, ("Registry entry: %wZ\n", Keyword));
    }

    MiniportResource->ResourceType = MINIPORT_RESOURCE_TYPE_REGISTRY_DATA;
    MiniportResource->Resource = *ParameterValue;

    ExInterlockedInsertTailList(&ConfigurationContext->ResourceListHead, &MiniportResource->ListEntry, &ConfigurationContext->ResourceLock);

    ExFreePool(KeyInformation);

    *Status = NDIS_STATUS_SUCCESS;
}

/*
 * @implemented
 */
VOID
EXPORT
NdisReadNetworkAddress(
    OUT PNDIS_STATUS    Status,
    OUT PVOID           * NetworkAddress,
    OUT PUINT           NetworkAddressLength,
    IN  NDIS_HANDLE     ConfigurationHandle)
/*
 * FUNCTION: Reads the network address from the registry
 * ARGUMENTS:
 *     Status - variable to receive status
 *     NetworkAddress - pointer to a buffered network address array
 *     NetworkAddressLength - length of the NetworkAddress array
 *     ConfigurationHandle: handle passed back from one of the open routines
 * RETURNS:
 *     NDIS_STATUS_SUCCESS on success
 *     NDIS_STATUS_FAILURE on failure
 *     The network address is placed in the NetworkAddress buffer
 */
{
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext = (PMINIPORT_CONFIGURATION_CONTEXT)ConfigurationHandle;
    PMINIPORT_RESOURCE MiniportResource = NULL;
    PNDIS_CONFIGURATION_PARAMETER ParameterValue = NULL;
    NDIS_STRING Keyword;
    UINT *IntArray = 0;
    UINT i,j = 0;
    NDIS_STRING str;

    NdisInitUnicodeString(&Keyword, L"NetworkAddress");
    NdisReadConfiguration(Status, &ParameterValue, ConfigurationHandle, &Keyword, NdisParameterString);
    if(*Status != NDIS_STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MID_TRACE, ("NdisReadConfiguration failed (%x)\n", *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    if (ParameterValue->ParameterType == NdisParameterInteger)
    {
        WCHAR Buff[11];

        NDIS_DbgPrint(MAX_TRACE, ("Read integer data %lx\n",
                                  ParameterValue->ParameterData.IntegerData));

        str.Buffer = Buff;
        str.MaximumLength = (USHORT)sizeof(Buff);
        str.Length = 0;

        *Status = RtlIntegerToUnicodeString(ParameterValue->ParameterData.IntegerData,
                                            10,
                                            &str);

        if (*Status != NDIS_STATUS_SUCCESS)
        {
            NDIS_DbgPrint(MIN_TRACE, ("RtlIntegerToUnicodeString failed (%x)\n", *Status));
            *Status = NDIS_STATUS_FAILURE;
            return;
        }

        NDIS_DbgPrint(MAX_TRACE, ("Converted integer data into %wZ\n", &str));
    }
    else
    {
        ASSERT(ParameterValue->ParameterType == NdisParameterString);
        str = ParameterValue->ParameterData.StringData;
    }

    while (j < str.Length && str.Buffer[j] != '\0') j++;
    
    *NetworkAddressLength = (j+1) >> 1;

    if ((*NetworkAddressLength) == 0)
    {
        NDIS_DbgPrint(MIN_TRACE,("Empty NetworkAddress registry entry.\n"));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    IntArray = ExAllocatePool(PagedPool, (*NetworkAddressLength)*sizeof(UINT));
    if(!IntArray)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        *Status = NDIS_STATUS_RESOURCES;
        return;
    }

    MiniportResource = ExAllocatePool(PagedPool, sizeof(MINIPORT_RESOURCE));
    if(!MiniportResource)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        ExFreePool(IntArray);
        *Status = NDIS_STATUS_RESOURCES;
        return;
    }

    MiniportResource->ResourceType = MINIPORT_RESOURCE_TYPE_MEMORY;
    MiniportResource->Resource = IntArray;
    NDIS_DbgPrint(MID_TRACE,("inserting 0x%x into the resource list\n", MiniportResource->Resource));
    ExInterlockedInsertTailList(&ConfigurationContext->ResourceListHead, &MiniportResource->ListEntry, &ConfigurationContext->ResourceLock);

    /* convert from string to bytes */
    for(i=0; i<(*NetworkAddressLength); i++)
    {
        IntArray[i] = (UnicodeToHexByte((str.Buffer)[2*i]) << 4) +
                UnicodeToHexByte((str.Buffer)[2*i+1]);
    }

    *NetworkAddress = IntArray;

    *Status = NDIS_STATUS_SUCCESS;
}


/*
 * @implemented
 */
VOID
EXPORT
NdisOpenConfigurationKeyByIndex(
    OUT PNDIS_STATUS    Status,
    IN  NDIS_HANDLE     ConfigurationHandle,
    IN  ULONG           Index,
    OUT PNDIS_STRING    KeyName,
    OUT PNDIS_HANDLE    KeyHandle)
/*
 * FUNCTION: Opens a configuration subkey by index number
 * ARGUMENTS:
 *     Status: pointer to an NDIS_STATUS to receive status info
 *     ConfigurationHandle: the handle passed back from a previous open function
 *     Index: the zero-based index of the subkey to open
 *     KeyName: the name of the key that was opened
 *     KeyHandle: a handle to the key that was opened
 * RETURNS:
 *     NDIS_STATUS_SUCCESS on success
 *     NDIS_STATUS_FAILURE on failure
 *     KeyName holds the name of the opened key
 *     KeyHandle holds a handle to the new key
 */
{
    KEY_BASIC_INFORMATION *KeyInformation;
    ULONG KeyInformationLength;
    OBJECT_ATTRIBUTES KeyAttributes;
    NDIS_HANDLE RegKeyHandle;
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext;

    *KeyHandle = NULL;

    *Status = ZwEnumerateKey(ConfigurationHandle, Index, KeyBasicInformation, NULL, 0, &KeyInformationLength);
    if(*Status != STATUS_BUFFER_TOO_SMALL && *Status != STATUS_BUFFER_OVERFLOW && *Status != STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MIN_TRACE, ("ZwEnumerateKey failed (%x)\n", *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    KeyInformation = ExAllocatePool(PagedPool, KeyInformationLength + sizeof(KEY_BASIC_INFORMATION));
    if(!KeyInformation)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    *Status = ZwEnumerateKey(ConfigurationHandle, Index, KeyBasicInformation, KeyInformation,
        KeyInformationLength + sizeof(KEY_BASIC_INFORMATION), &KeyInformationLength);

    if(*Status != STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MIN_TRACE, ("ZwEnumerateKey failed (%x)\n", *Status));
        ExFreePool(KeyInformation);
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    /* should i fail instead if the passed-in string isn't long enough? */
    wcsncpy(KeyName->Buffer, KeyInformation->Name, KeyName->MaximumLength/sizeof(WCHAR));
    KeyName->Length = (USHORT)min(KeyInformation->NameLength, KeyName->MaximumLength);

    InitializeObjectAttributes(&KeyAttributes, KeyName, OBJ_CASE_INSENSITIVE, ConfigurationHandle, NULL);

    *Status = ZwOpenKey(&RegKeyHandle, KEY_ALL_ACCESS, &KeyAttributes);

    ExFreePool(KeyInformation);

    if(*Status != STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MIN_TRACE, ("ZwOpenKey failed (%x)\n", *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    ConfigurationContext = ExAllocatePool(NonPagedPool, sizeof(MINIPORT_CONFIGURATION_CONTEXT));
    if(!ConfigurationContext)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        ZwClose(RegKeyHandle);
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    KeInitializeSpinLock(&ConfigurationContext->ResourceLock);
    InitializeListHead(&ConfigurationContext->ResourceListHead);

    ConfigurationContext->Handle = RegKeyHandle;

    *KeyHandle = (NDIS_HANDLE)ConfigurationContext;

    *Status = NDIS_STATUS_SUCCESS;
}


/*
 * @implemented
 */
VOID
EXPORT
NdisOpenConfigurationKeyByName(
    OUT PNDIS_STATUS    Status,
    IN  NDIS_HANDLE     ConfigurationHandle,
    IN  PNDIS_STRING    KeyName,
    OUT PNDIS_HANDLE    KeyHandle)
/*
 * FUNCTION: Opens a configuration subkey by name
 * ARGUMENTS:
 *     Status: points to an NDIS_STATUS where status is returned
 *     ConfigurationHandle: handle returned by a previous open call
 *     KeyName: the name of the key to open
 *     KeyHandle: a handle to the opened key
 * RETURNS:
 *     NDIS_STATUS_SUCCESS on success
 *     NDIS_STATUS_FAILURE on failure
 *     KeyHandle holds a handle to the newly-opened key
 * NOTES:
 */
{
    PMINIPORT_CONFIGURATION_CONTEXT ConfigurationContext;
    OBJECT_ATTRIBUTES KeyAttributes;
    NDIS_HANDLE RegKeyHandle;

    *KeyHandle = NULL;

    InitializeObjectAttributes(&KeyAttributes, KeyName, OBJ_CASE_INSENSITIVE, ConfigurationHandle, 0);
    *Status = ZwOpenKey(&RegKeyHandle, KEY_ALL_ACCESS, &KeyAttributes);

    if(*Status != STATUS_SUCCESS)
    {
        NDIS_DbgPrint(MIN_TRACE, ("ZwOpenKey failed (%x)\n", *Status));
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    ConfigurationContext = ExAllocatePool(NonPagedPool, sizeof(MINIPORT_CONFIGURATION_CONTEXT));
    if(!ConfigurationContext)
    {
        NDIS_DbgPrint(MIN_TRACE,("Insufficient resources.\n"));
        ZwClose(RegKeyHandle);
        *Status = NDIS_STATUS_FAILURE;
        return;
    }

    KeInitializeSpinLock(&ConfigurationContext->ResourceLock);
    InitializeListHead(&ConfigurationContext->ResourceListHead);

    ConfigurationContext->Handle = RegKeyHandle;

    *KeyHandle = (NDIS_HANDLE)ConfigurationContext;

    *Status = NDIS_STATUS_SUCCESS;
}