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

using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.Singularity;
using Microsoft.SingSharp;
using Microsoft.Singularity.Channels;
using Utils;

namespace Smb.Protocol
{
    // Codes for the Setup[0] field of SMB_TRANS2
    enum SmbTransaction2Code
    {
		Open = 0,
		FindFirst = 1,
		FindNext = 2,
		QueryFsInformation = 3,
		Reserved = 4, // SetFsInformation = 4,
		QueryPathInformation = 5,
		SetPathInformation = 6,
		QueryFileInformation = 7,
		SetFileInformation = 8,
		FsControl = 9,
		IoControl = 0xa,
		FindNotifyFirst = 0xb,
		FindNotifyNext = 0xc,
		CreateDirectory = 0xd,
		SessionSetup = 0xe,
		GetDfsReferral = 0x10,
		ReportDfsInconsistency = 0x11,
    }
    
    // This structure describes the SMB_COM_TRANSACTION2 message header.
    // This is described in [1] page 32.
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbTransaction2Request
    {
		public SmbHeader Header;
		public SmbTransaction2RequestHeader Transaction;
	}
	
    // This structure describes the SMB_COM_TRANSACTION2 message header.
    // This is described in [1] page 32.
    // Note that the alignment of this structure is "sane", unlike that of SmbHeader.
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbTransaction2RequestHeader
    {
		// public const SmbCommand Command = SmbCommand.Transaction2;
		// public SmbHeader Header;
		
		// public const byte ParameterCount = 14 + SetupCount;
		// The ParameterCount field in SmbHeader needs to be set to 14 + SetupCount.
		public const int HeaderParameterCount = 14;
		
		public ushort TotalParameterCount;				// Total parameter bytes being sent
		public ushort TotalDataCount;					// Total data bytes being sent
		public ushort MaxParameterCount;				// Max parameter bytes to return
		public ushort MaxDataCount;						// Max data bytes to return
		public byte MaxSetupCount;						// Max setup words to return
		public byte Reserved;							// zero
		public ushort Flags;							// bit 0 - Disconnect TID
		public uint Timeout;							//
		public ushort Reserved2;						// zero
		public ushort ParameterCount;					// Parameter bytes sent this buffer
		public ushort ParameterOffset;					// Offset (from header start) to Parameters
		public ushort DataCount;						// Data bytes sent this buffer
		public ushort DataOffset;						// Offset (from header start) to data
		public byte SetupCount;							// Count of setup words
		public byte Reserved3;							// zero
		public ushort Setup0;							// setup word 0, which is usually the transaction code
		// public ushort[] Setup[SetupCount];			// Setup words (# = SetupWordCount)
		// public ushort ByteCount;
		// STRING Name[];								// must be null
		// byte Pad[];									// Pad to SHORT or LONG
		// byte Parameters[ParameterCount];				// parameter bytes
		// byte Pad1[];									// Pad to SHORT or LONG
		// byte Data[DataCount];						// Data bytes (# = DataCount)
    }


	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbTransaction2ResponseHeader
	{
		public ushort TotalParameterCount;
		public ushort TotalDataCount;
		public ushort Reserved;
		public ushort ParameterCount;
		public ushort ParameterOffset;
		public ushort ParameterDisplacement;
		public ushort DataCount;
		public ushort DataOffset;
		public ushort DataDisplacement;
		public ushort Fid;
		public ushort ByteCount;
		
		// byte Pad[];
		// byte Parameters[ParameterCount];
		// byte Pad[];
		// byte Data[];
	}
	
	[StructLayout(LayoutKind.Sequential, Pack=1)]
	pointerfree struct SmbTransaction2Response
	{
		public SmbHeader Header;
		public SmbTransaction2ResponseHeader Transaction;
	}


	//
	//[StructLayout(LayoutKind.Sequential, Pack=1)]
	//pointerfree struct SmbCheckDirectoryRequest
	//{
	//	public SmbComTransaction2RequestHeader TransactionHeader;
	//	// WordCount = 0
	//	// ByteCount = ?
	//	// BufferFormat = 4
	//	// STRING DirectoryPath
	//}
	//

    // This structure describes the TRANS2_FIND_FIRST request.
    // This request searches a directory, using a given wildcard pattern.
	// page 99 - describes TRANS2_FIND_FIRST2
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbFindFirst2Request
    {
		public SmbHeader Header;
		public SmbTransaction2RequestHeader Transaction;
		// WordCount = 15
		// SetupCount = 1
		// Setup[0] = TRANS2_FIND_FIRST2 = Transaction2Code.FindFirst
		
    }
    
    [StructLayout(LayoutKind.Sequential)]
    pointerfree struct SmbFindFirstParametersHeader
    {
		public ushort SearchAttributes;
		public ushort SearchCount;
		public ushort Flags;
			// bit 0 - close search after this request
			// bit 1 - close search if end of search reached
			// bit 2 - return resume keys for each entry found
			// bit 3 - continue search from previous ending place
			// bit 4 - find with backup intent
		public ushort InformationLevel; // FindFirstInformationLevel
		public uint SearchStorageType;
		// STRING FileName;
		// byte Data[TotalDataCount];
		// Data contains EA list if InformationLevel = QUERY_EAS_FROM_LIST
    }
    
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    pointerfree struct SmbFindFirstResponseParametersParameters
    {
		public ushort SearchId;
		public ushort SearchCount;
		public ushort EndOfSearch;
		public ushort EaErrorOffset;
		public ushort LastNameOffset;
		// public byte[TotalDataCount];
    }
    
    [Flags]
    enum SmbSearchAttributes : ushort
    {
		ReadOnly = 1,
		Hidden = 2,
		System = 4,
		Deprecated_VolumeId = 8,
		Directory = 0x10,
		Archive = 0x20,
    }
    
    [Flags]
    enum SmbSearchFlags : ushort
    {
		CloseAfterRequest = 1,
		CloseIfLastResponse = 2,
		ReturnResumeKeysForEachEntry = 4,
		ResumeFromPrevious = 8,
		BackupIntent = 0x10,
    }
    
    enum SmbSearchInformationLevel
    {
		Standard = 1,
		QueryEaSize = 2,
		QueryEasFromList = 3,
		FileDirectoryInfo = 0x101,
		FileFullDirectoryInfo = 0x102,
		FileNamesInfo = 0x103,
		FileBothDirectoryInfo = 0x104,
		FileUnix = 0x202,
    }

    [StructLayout(LayoutKind.Sequential)]    
    pointerfree struct SmbQueryFileBasicInfo
    {
        public FILETIME CreationTime;
        public FILETIME LastAccessTime;
        public FILETIME LastWriteTime;
        public FILETIME ChangeTime;
        public uint Attributes;
        public uint Padding;
    }
    
    [StructLayout(LayoutKind.Sequential)]    
    pointerfree struct SmbQueryFileStandardInfo
    {
        public long AllocationSize;
        public long EndOfFile;
        public uint NumberOfLinks;
        public byte DeletePending;
        public byte Directory;
    }
        
}