/*++ BUILD Version: 0001    // Increment this if a change has global effects

Copyright (c) Microsoft Corporation.  All rights reserved.

Module Name:

    ntcsrmsg.h

Abstract:

    This module defines the public message format shared by the client and
    server sides of the Client-Server Runtime (Csr) Subsystem.

Author:

    Steve Wood (stevewo) 09-Oct-1990

Revision History:

--*/

#ifndef _NTCSRMSG_
#define _NTCSRMSG_

#ifdef __cplusplus
extern "C" {
#endif

#define CSR_API_PORT_NAME L"ApiPort"

//
// This structure is filled in by the client prior to connecting to the CSR
// server.  The CSR server will fill in the OUT fields if prior to accepting
// the connection.
//

typedef struct _CSR_API_CONNECTINFO {
    OUT HANDLE ObjectDirectory;
    OUT PVOID SharedSectionBase;
    OUT PVOID SharedStaticServerData;
    OUT PVOID SharedSectionHeap;
    OUT ULONG DebugFlags;
    OUT ULONG SizeOfPebData;
    OUT ULONG SizeOfTebData;
    OUT ULONG NumberOfServerDllNames;
    OUT HANDLE ServerProcessId;
} CSR_API_CONNECTINFO, *PCSR_API_CONNECTINFO;

//
// Message format for messages sent from the client to the server
//

typedef struct _CSR_CLIENTCONNECT_MSG {
    IN ULONG ServerDllIndex;
    IN OUT PVOID ConnectionInformation;
    IN OUT ULONG ConnectionInformationLength;
} CSR_CLIENTCONNECT_MSG, *PCSR_CLIENTCONNECT_MSG;

#define CSR_NORMAL_PRIORITY_CLASS   0x00000010
#define CSR_IDLE_PRIORITY_CLASS     0x00000020
#define CSR_HIGH_PRIORITY_CLASS     0x00000040
#define CSR_REALTIME_PRIORITY_CLASS 0x00000080

//
// This helps out the Wow64 thunk generater, so we can change
// RelatedCaptureBuffer from struct _CSR_CAPTURE_HEADER* to PCSR_CAPTURE_HEADER.
// Redundant typedefs are legal, so we leave the usual form in as well.
//
struct _CSR_CAPTURE_HEADER;
typedef struct _CSR_CAPTURE_HEADER CSR_CAPTURE_HEADER, *PCSR_CAPTURE_HEADER;

typedef struct _CSR_CAPTURE_HEADER {
    ULONG Length;
    PCSR_CAPTURE_HEADER RelatedCaptureBuffer;
    ULONG CountMessagePointers;
    PCHAR FreeSpace;
    ULONG_PTR MessagePointerOffsets[1]; // Offsets within CSR_API_MSG of pointers
} CSR_CAPTURE_HEADER, *PCSR_CAPTURE_HEADER;

typedef ULONG CSR_API_NUMBER;

typedef struct _CSR_API_MSG {
    PORT_MESSAGE h;
    union {
        CSR_API_CONNECTINFO ConnectionRequest;
        struct {
            PCSR_CAPTURE_HEADER CaptureBuffer;
            CSR_API_NUMBER ApiNumber;
            ULONG ReturnValue;
            ULONG Reserved;
            union {
                CSR_CLIENTCONNECT_MSG ClientConnect;
                ULONG_PTR ApiMessageData[39];
            } u;
        };
    };
} CSR_API_MSG, *PCSR_API_MSG;

#define WINSS_OBJECT_DIRECTORY_NAME     L"\\Windows"

#define CSRSRV_SERVERDLL_INDEX          0
#define CSRSRV_FIRST_API_NUMBER         0

#define BASESRV_SERVERDLL_INDEX         1
#define BASESRV_FIRST_API_NUMBER        0

#define CONSRV_SERVERDLL_INDEX          2
#define CONSRV_FIRST_API_NUMBER         512

#define USERSRV_SERVERDLL_INDEX         3
#define USERSRV_FIRST_API_NUMBER        1024

#define CSR_MAKE_API_NUMBER( DllIndex, ApiIndex ) \
    (CSR_API_NUMBER)(((DllIndex) << 16) | (ApiIndex))

#define CSR_APINUMBER_TO_SERVERDLLINDEX( ApiNumber ) \
    ((ULONG)((ULONG)(ApiNumber) >> 16))

#define CSR_APINUMBER_TO_APITABLEINDEX( ApiNumber ) \
    ((ULONG)((USHORT)(ApiNumber)))

#ifdef __cplusplus
}
#endif

#endif