// ----------------------------------------------------------------------------
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ----------------------------------------------------------------------------

using System;
using System.Runtime.InteropServices;
using SmbClient;

namespace Smb.Protocol
{
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbCloseFileRequest
	{
		public SmbHeader Header;
		public ushort Fid;
		public uint LastWriteTime;
		public ushort ByteCount; // = 0
	}

	[StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbNtCreateAndXRequest
    {
		public SmbHeader Header;
		/*[FieldOffset(37)]*/ public byte AndXCommand;
		/*[FieldOffset(38)]*/ public byte AndXReserved;
		/*[FieldOffset(39)]*/ public ushort AndXOffset;
		/*[FieldOffset(41)]*/ public byte Reserved;
		/*[FieldOffset(42)]*/ public ushort NameLength;
		/*[FieldOffset(44)]*/ public uint Flags;
		/*[FieldOffset(48)]*/ public uint RootDirectoryFid;
		/*[FieldOffset(52)]*/ public uint DesiredAccess;
		/*[FieldOffset(56)]*/ public ulong AllocationSize;
		/*[FieldOffset(64)]*/ public uint ExtFileAttributes;
		/*[FieldOffset(68)]*/ public uint ShareAccess;
		/*[FieldOffset(72)]*/ public uint CreateDisposition;
		/*[FieldOffset(76)]*/ public uint CreateOptions;
		/*[FieldOffset(80)]*/ public uint ImpersonationLevel;
		/*[FieldOffset(84)]*/ public byte SecurityFlags;
		/*[FieldOffset(85)]*/ public ushort ByteCount;
		/*[FieldOffset(86)]*/ public byte Padding;
		// STRING Name[];
    }
    
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbNtCreateAndXResponse
	{
		public SmbHeader Header;
		
		public byte AndXCommand;			// always 0xff
		public byte AndXReserved;			// always 0
		public ushort AndXOffset;			// always 0
		public byte OplockLevel;
		public ushort Fid;
		public uint CreateAction;
		public FILETIME CreationTime;
		public FILETIME LastAccessTime;
		public FILETIME LastWriteTime;
		public FILETIME ChangeTime;
		public uint ExtFileAttributes;
		public long AllocationSize;
		public long EndOfFile;
		public ushort FileType;
		public ushort DeviceState;
		public bool Directory;
		public ushort ByteCount; // zero
	}
	
	// This request supports wildcards.   
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbDeleteFileRequest
	{
		public SmbHeader Header;
		public ushort SearchAttributes;
		public ushort ByteCount;				// length of filename in bytes
		public byte BufferFormat;				// 4
		public byte AlignmentPadding;			// for Unicode
		// STRING FileName;		
		
		public const int ParameterCount = 1;
	}
	
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbDeleteDirectoryRequest
	{
		public SmbHeader Header;
		public ushort ByteCount;				// length of filename in bytes
		public byte BufferFormat;				// 4
		public byte AlignmentPadding;			// for Unicode
		// STRING DirectoryName;		
		public const int ParameterCount = 0;
	}
	
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbCreateDirectoryRequest
	{
		public SmbHeader Header;
		public SmbTransaction2RequestHeader Transaction;
		
		// Header.ParameterCount = 15
		public uint Reserved;
		// STRING name[];
		// byte Data[]; // Ea list, optional
	}
	
	
	
	[Flags]
	public enum SmbFileShareAccess
	{
		None = 0,
		Read = 1,
		Write = 2,
		Delete = 4,
	}
	
	public enum SmbCreateDisposition
	{
		Supersede = 0,
		Open = 1,
		Create = 2,
		OpenIf = 3,
		Overwrite = 4,
		OverwriteIf = 5,
	}
	
    public enum SmbFileCreateActionTaken
    {
    }

	public enum SmbFileCreateOptions : uint
	{
		None = 0,
	}
	
	[Flags]
	public enum SmbNtCreateFileFlags : uint
	{
		RequestOpLock = 2,
		RequestBatchOpLock = 4,
		DirectoryOnly = 8,
	}
	
	public enum SmbImpersonationLevel : uint
	{
		Anonymous = 0,
		Identification = 1,
		Impersonation = 2,
		Delegation = 3,
	}
	
	public enum SmbCreateFileSecurityFlags : uint
	{
		ContextTracking = 0x40000,
		EffectiveOnly = 0x80000,
	}

    [Flags]
    enum SmbFileAttributes : uint
    {
        ReadOnly = 1,
        Hidden = 2,
        System = 4,
        Obsolete_VolumeId = 8,
        Directory = 0x10,
        Archive = 0x20,
        Compressed = 0x800,
        Temporary = 0x100,
        Normal = 0x80,
        
        WriteThrough = 0x80000000u,
        NoBuffering =  0x20000000u,
        RandomAccess = 0x10000000u,
        SequentialScan = 0x08000000u,
        DeleteOnClose = 0x04000000,
        BackupSemantics = 0x02000000u,
    }

    [Flags]
    enum SmbFindFirstFlag
    {
        CloseSearchAfterThisRequest = 1,
        CloseSearchIfNoMore = 2,
        ReturnResumeKeysForAllEntries = 4,
        ResumeFromPrevious = 8,
        FindWithBackupIntent = 0x10,
    }

    enum SmbFindFirstInformationLevel
    {
        Standard = 1,
        QueryEaSize = 2,
        QueryEasFromList = 3,
        FileDirectoryInfo = 0x101,
        FileFullDirectoryInfo = 0x102,
        FileNamesInfo = 0x103,
        FileBothDirectoryInfo = 0x104,
        FileUnix = 0x202,
    }

	//
 // pointerfree struct SmbFileInfoStandard
 // {
	//	public SmbDate CreationDate;
	//	public SmbTime CreationTime;
	//	public SmbDate LastAccessDate;
	//	public SmbTime LastAccessTime;
	//	public SmbDate LastWriteDate;
	//	public SmbTime LastWriteTime;
	//	public uint DataSize;
	//	public uint AllocationSize;
	//	public ushort Attributes; // use SmbFileAttributes
	//	public byte FileNameLength;
	//	// STRING FileName;		
 // }
 // 
 // pointerfree struct SmbDate
 // {
 // }
 // 
 // pointerfree struct SmbTime
 // {
 // }
 // 
 //   
    
    [StructLayout(LayoutKind.Sequential)]
    pointerfree struct FILETIME
    {
		public Int64 Ticks;
		
		override public string! ToString()
		{
			DateTime t = new DateTime(this.Ticks);
			// WARNING: DateTime.ToString() is defective.
			// return (!)t.ToString();
			return (!)t.ToString("D");
		}
		
		public static implicit operator DateTime(FILETIME t)
		{
			return new DateTime(t.Ticks);
		}
    }
    
    [StructLayout(LayoutKind.Sequential, Size=68)]
    pointerfree struct SmbFindFileDirectoryInfo
    {
		public uint NextEntryOffset;
		public uint FileIndex;
		public FILETIME CreationTime;
		public FILETIME LastAccessTime;
		public FILETIME LastWriteTime;
		public FILETIME ChangeTime;
		public Int64 EndOfFile;
		public Int64 AllocationSize;
		public uint ExtFileAttributes;
		public uint FileNameLength;
		public uint EaSize;
		// STRING FileName;
		
		public const int SizeOf = 68;
    }
    
    
    //
    //This structure describes the SMB ReadAndX request, which reads a block of data from
    //an open file handle.  There are two variants of this structure; the older variant uses
    //32-bit file offsets, and so is not appropriate for modern filesystems.  The newer
    //variant, which this structure describes, is distinguished from the older variant by the
    //ParameterCount field (of SmbHeader); the newer variant uses a value of 12.
    //
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbReadAndXRequest
    {
		public SmbHeader Header;
		public byte AndXCommand;
		public byte AndXReserved;
		public ushort AndXOffset;
		public ushort Fid;
		public uint FileOffsetLow;
		public ushort MaxCount;
		public ushort MinCount;
		public uint MaxCountHigh;
		public ushort Remaining;
		public uint FileOffsetHigh;
		public ushort ByteCount;
		
		public const int ParameterCount = 12;		
    }
    
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbReadAndXResponse
    {
		public SmbHeader Header;
		public byte AndXCommand;
		public byte AndXReserved;
		public ushort AndXOffset;
		public ushort Remaining;			// obsolete, always -1
		public ushort DataCompactionMode;
		public ushort Reserved;
		public ushort DataLength;
		public ushort DataOffset;
		public ushort DataLengthHigh;
		public ushort Reserved0;
		public ushort Reserved1;
		public ushort Reserved2;
		public ushort Reserved3;
		public ushort ByteCount;
		// byte padding[];
		// byte data[DataLength];
    }
    
    //
    //This structure describes the SMB WriteAndX request, which writes a block of bytes
    //to an open file handle.  The request has two variants, which are distinguished by
    //the parameter count.  The older variant uses 32-bit file offsets, and is not
    //suitable for modern file sizes; this variant is identified by parameter count = 12.
    //The newer variant, which this structure describes, uses 64-bit file offsets, and
    //is the variant described by this structure.
    //
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbWriteAndXRequest
    {
		public SmbHeader Header;
		public byte AndXCommand;                // always 0xff
		public byte AndXReserved;               // zero
		public ushort AndXOffset;               // zero
		public ushort Fid;                      // open file id
		public uint FileOffsetLow;              // bits 0-31 of offset within file
		public uint Reserved;                   // zero
		public ushort WriteMode;                // bit 0 = "write through"
		public ushort Remaining;                // no idea
		public ushort DataLengthHigh;           // bits 16-31 of length of file data in this message
		public ushort DataLengthLow;            // bits 0-15 of length of file data in this message
		public ushort DataOffset;               // offset within SMB message (from beginning of SMB message) of data
		public uint FileOffsetHigh;             // bits 32-63 of offset within file
		public ushort ByteCount;                // bytes to transfer; ignored if CAP_LARGE_WRITEX enabled
		// pad to 4-byte
		// byte[] data
		
		public const int ParameterCount = 14;
    }

    //
    //Describes the response to the WriteAndX SMB request.
    //
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbWriteAndXResponse
    {
		public SmbHeader Header;
		public byte AndXCommand;            // always 0xff, ignore
		public byte AndXReserved;           // ignore
		public ushort AndXOffset;           // ignore
		public ushort Count;                // number of bytes transferred
		public ushort Remaining;            // obsolete; ignore
		public uint Reserved;               // ignore
		public ushort ByteCount;            // number of bytes in data block, always zero
    }
    
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbQueryFileInformationRequest
    {
		public SmbHeader Header;
		public SmbTransaction2RequestHeader Transaction;
		public ushort StupidPaddingSmbMakesMeCrazy;
		public ushort ByteCount;
		public ushort InformationLevel;
		public uint Reserved;
		public byte Padding;		
		// path
    }
    
}