コード例 #1
0
ファイル: mailslot.c プロジェクト: hoangduit/reactos
/*
 * @implemented
 */
HANDLE
WINAPI
CreateMailslotW(IN LPCWSTR lpName,
                IN DWORD nMaxMessageSize,
                IN DWORD lReadTimeout,
                IN LPSECURITY_ATTRIBUTES lpSecurityAttributes)
{
    OBJECT_ATTRIBUTES ObjectAttributes;
    UNICODE_STRING MailslotName;
    HANDLE MailslotHandle;
    NTSTATUS Status;
    BOOLEAN Result;
    LARGE_INTEGER DefaultTimeOut;
    IO_STATUS_BLOCK Iosb;
    ULONG Attributes = OBJ_CASE_INSENSITIVE;
    PSECURITY_DESCRIPTOR SecurityDescriptor = NULL;

    Result = RtlDosPathNameToNtPathName_U(lpName, &MailslotName, NULL, NULL);
    if (!Result)
    {
        SetLastError(ERROR_PATH_NOT_FOUND);
        return INVALID_HANDLE_VALUE;
    }

    DPRINT("Mailslot name: %wZ\n", &MailslotName);

    if (lpSecurityAttributes)
    {
        SecurityDescriptor = lpSecurityAttributes->lpSecurityDescriptor;
        if(lpSecurityAttributes->bInheritHandle) Attributes |= OBJ_INHERIT;
    }

    InitializeObjectAttributes(&ObjectAttributes,
                               &MailslotName,
                               Attributes,
                               NULL,
                               SecurityDescriptor);

    if (lReadTimeout == MAILSLOT_WAIT_FOREVER)
    {
        /* Set the max */
        DefaultTimeOut.QuadPart = 0xFFFFFFFFFFFFFFFFLL;
    }
    else
    {
        /* Convert to NT format */
        DefaultTimeOut.QuadPart = lReadTimeout * -10000LL;
    }

    Status = NtCreateMailslotFile(&MailslotHandle,
                                  GENERIC_READ | SYNCHRONIZE | WRITE_DAC,
                                  &ObjectAttributes,
                                  &Iosb,
                                  FILE_WRITE_THROUGH,
                                  0,
                                  nMaxMessageSize,
                                  &DefaultTimeOut);

    if ((Status == STATUS_INVALID_DEVICE_REQUEST) ||
        (Status == STATUS_NOT_SUPPORTED))
    {
        Status = STATUS_OBJECT_NAME_INVALID;
    }

    RtlFreeHeap(RtlGetProcessHeap(), 0, MailslotName.Buffer);

    if (!NT_SUCCESS(Status))
    {
        DPRINT1("NtCreateMailslot failed (Status %x)!\n", Status);
        BaseSetLastNTError(Status);
        return INVALID_HANDLE_VALUE;
    }

    return MailslotHandle;
}
コード例 #2
0
ファイル: mailslot.c プロジェクト: mingpen/OpenNT
HANDLE
APIENTRY
CreateMailslotW(
    IN LPCWSTR lpName,
    IN DWORD nMaxMessageSize,
    IN DWORD lReadTimeout,
    IN LPSECURITY_ATTRIBUTES lpSecurityAttributes OPTIONAL
    )

/*++

Routine Description:

    The create mailslot API creates a local mailslot and return a
    server-side handle to the mailslot.

Arguments:

    lpName - The name of the mailslot.  This must be a local mailslot
        name.

    nMaxMessageSize - The size (in bytes) of the largest message that
        can be written to the mailslot.

    lReadTimeout - The initial read timeout, in milliseconds.  This
        is the amount of time a read operation will block waiting for
        a message to be written to the mailslot.  This value can be
        changed with the SetMailslotInfo API.

    lpSecurityAttributes - An optional pointer to security information
        for this mailslot.

Return Value:

    Returns one of the following:

    0xFFFFFFFF --An error occurred.  Call GetLastError for more
    information.

    Anything else --Returns a handle for use in the server side of
    subsequent mailslot operations.

--*/

{
    OBJECT_ATTRIBUTES objectAttributes;
    UNICODE_STRING fileName;
    LPWSTR filePart;
    RTL_RELATIVE_NAME relativeName;
    IO_STATUS_BLOCK ioStatusBlock;
    LARGE_INTEGER readTimeout;
    HANDLE handle;
    NTSTATUS status;
    PVOID freeBuffer;
    BOOLEAN TranslationStatus;

    RtlInitUnicodeString( &fileName, lpName );

    TranslationStatus = RtlDosPathNameToNtPathName_U(
                            lpName,
                            &fileName,
                            &filePart,
                            &relativeName
                            );

    if ( !TranslationStatus ) {
        SetLastError(ERROR_PATH_NOT_FOUND);
        return INVALID_HANDLE_VALUE;
    }

    freeBuffer = fileName.Buffer;

    if ( relativeName.RelativeName.Length ) {
        fileName = *(PUNICODE_STRING)&relativeName.RelativeName;
    } else {
        relativeName.ContainingDirectory = NULL;
    }

    InitializeObjectAttributes(
        &objectAttributes,
        &fileName,
        OBJ_CASE_INSENSITIVE,
        relativeName.ContainingDirectory,
        NULL
        );

    if ( ARGUMENT_PRESENT(lpSecurityAttributes) ) {
        objectAttributes.SecurityDescriptor =
            lpSecurityAttributes->lpSecurityDescriptor;
        if ( lpSecurityAttributes->bInheritHandle ) {
            objectAttributes.Attributes |= OBJ_INHERIT;
        }
    }

    if (lReadTimeout == MAILSLOT_WAIT_FOREVER) {
        readTimeout.HighPart = 0x7FFFFFFF;
        readTimeout.LowPart = 0xFFFFFFFF;
    } else {
        readTimeout.QuadPart = - (LONGLONG)UInt32x32To64( lReadTimeout, 10 * 1000 );
    }

    status = NtCreateMailslotFile (
                &handle,
                GENERIC_READ | SYNCHRONIZE | WRITE_DAC,
                &objectAttributes,
                &ioStatusBlock,
                FILE_CREATE,
                0,
                nMaxMessageSize,
                (PLARGE_INTEGER)&readTimeout
                );

    if ( status == STATUS_NOT_SUPPORTED ||
         status == STATUS_INVALID_DEVICE_REQUEST ) {

        //
        // The request must have been processed by some other device driver
        // (other than MSFS).  Map the error to something reasonable.
        //

        status = STATUS_OBJECT_NAME_INVALID;
    }

    RtlFreeHeap( RtlProcessHeap(), 0, freeBuffer );

    if (!NT_SUCCESS(status)) {
        BaseSetLastNTError( status );
        return INVALID_HANDLE_VALUE;
    }

    return handle;
}