?? packetinternet.cs
字號(hào):
using System;
using System.Windows.Forms;
namespace MyClasses
{
public class PacketINTERNET
{
public struct PACKET_INTERNET
{
public byte Version;
public byte HeaderLength;
public byte DifferentiatedServicesField;
public ushort Length;
public ushort Identification;
public byte Flags;
public ushort FragmentOffset;
public ushort TimeToLive;
public byte Protocol;
public ushort HeaderChecksum;
public string Source;
public string Destination;
}
public PacketINTERNET()
{
}
public static bool Parser( ref TreeNodeCollection mNode,
byte [] PacketData ,
ref int Index ,
ref ListViewItem LItem ,
ref uint PreviousHttpSequence ,
ref ushort LastTftpPort )
{
TreeNode mNodex;
TreeNode mNode1;
string Tmp = "";
PACKET_INTERNET PInternet;
mNodex = new TreeNode();
mNodex.Text = "INTERNET";
Function.SetPosition( ref mNodex , Index , Const.LENGTH_OF_INTERNET , true );
if( ( Index + Const.LENGTH_OF_INTERNET ) > PacketData.Length )
{
mNode.Add( mNodex );
Tmp = "[ Malformed INTERNET packet. Remaining bytes don't fit an INTERNET packet. Possibly due to bad decoding ]";
mNode.Add( Tmp );
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = Tmp;
return false;
}
try
{
PInternet.Version = PacketData[ Index++ ];
PInternet.HeaderLength = (byte) ( ( (int) PInternet.Version & 0x0f ) * 4 );
PInternet.Version = (byte) ( (int) PInternet.Version >> 4 );
Tmp = "Version : " + Function.ReFormatString( PInternet.Version , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 1 , 1 , false );
Tmp = "Length : " + Function.ReFormatString( PInternet.HeaderLength , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 1 , 1 , false );
PInternet.DifferentiatedServicesField = PacketData[ Index++ ];
mNode1 = new TreeNode();
mNode1.Text = "Differentiated Services Field : " + Function.ReFormatString( PInternet.DifferentiatedServicesField , null );
Function.SetPosition( ref mNode1 , Index - 1 , 1 , true );
mNode1.Nodes.Add( Function.DecodeBitField( PInternet.DifferentiatedServicesField , 0xfc , "Differentiated Services Codepoint ( Default : 0 )" ) );
Function.SetPosition( ref mNode1 , Index - 1 , 1 , false );
mNode1.Nodes.Add( Function.DecodeBitField( PInternet.DifferentiatedServicesField , 0x02 , "ECN Capable Transport ( ECT ) : Yes" , "ECN Capable Transport ( ECT ) : No" ) );
Function.SetPosition( ref mNode1 , Index - 1 , 1 , false );
mNode1.Nodes.Add( Function.DecodeBitField( PInternet.DifferentiatedServicesField , 0x01 , "ECN-CE : Yes" , "ECN-CE : No" ) );
Function.SetPosition( ref mNode1 , Index - 1 , 1 , false );
mNodex.Nodes.Add( mNode1 );
PInternet.Length = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
Tmp = "Total Length : " + Function.ReFormatString( PInternet.Length , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 2 , 2 , false );
PInternet.Identification = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
Tmp = "Identification : " + Function.ReFormatString( PInternet.Identification , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 2 , 2 , false );
PInternet.FragmentOffset = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
PInternet.Flags = (byte)( (int) PInternet.FragmentOffset >> 12 );
mNode1 = new TreeNode();
mNode1.Text = "Flags : " + Function.ReFormatString( PInternet.Flags , null );
Function.SetPosition( ref mNode1 , Index - 2 , 2 , true );
mNode1.Nodes.Add( Function.DecodeBitField( PInternet.Flags , 0x04 , "Dont fragment : Yes" , "Dont fragment : No" ) );
Function.SetPosition( ref mNode1 , Index - 2 , 2 , false );
mNode1.Nodes.Add( Function.DecodeBitField( PInternet.Flags , 0x02 , "More fragments : Yes" , "More fragments : No" ) );
Function.SetPosition( ref mNode1 , Index - 2 , 2 , false );
mNodex.Nodes.Add( mNode1 );
PInternet.FragmentOffset = (ushort) ( (int) PInternet.FragmentOffset & 0x0f );
Tmp = "Fragment Offset : " + Function.ReFormatString( PInternet.FragmentOffset , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 2 , 2 , false );
PInternet.TimeToLive = PacketData[ Index++ ];
Tmp = "Time To Live : " + Function.ReFormatString( PInternet.TimeToLive , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 1 , 1 , false );
PInternet.Protocol = PacketData[ Index++ ];
Tmp = "Protocol : " + Function.ReFormatString( PInternet.Protocol , Const.GetProtocolStr( PInternet.Protocol ) );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 1 , 1 , false );
PInternet.HeaderChecksum = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
Tmp = "Header Checksum : " + Function.ReFormatString( PInternet.HeaderChecksum , null );
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 2 , 2 , false );
PInternet.Source = Function.GetIpAddress( PacketData , ref Index );
Tmp = "Source : " + PInternet.Source;
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 4 , 4 , false );
PInternet.Destination = Function.GetIpAddress( PacketData , ref Index );
Tmp = "Destination : " + PInternet.Destination;
mNodex.Nodes.Add( Tmp );
Function.SetPosition( ref mNodex , Index - 4 , 4 , false );
LItem.SubItems[ Const.LIST_VIEW_PROTOCOL_INDEX ].Text = "INTERNET";
LItem.SubItems[ Const.LIST_VIEW_SOURCE_INDEX ].Text = PInternet.Source;
LItem.SubItems[ Const.LIST_VIEW_DESTINATION_INDEX ].Text = PInternet.Destination;
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = "Internet packet";
mNode.Add( mNodex );
if( PInternet.Protocol == Const.IPPROTO_TCP )
{
PacketTCP.Parser( ref mNode , PacketData , ref Index , ref LItem , ref PreviousHttpSequence );
}
else if( PInternet.Protocol == Const.IPPROTO_UDP )
{
PacketUDP.Parser( ref mNode , PacketData , ref Index , ref LItem , ref LastTftpPort);
}
else if( PInternet.Protocol == Const.IPPROTO_ICMP )
{
PacketICMP.Parser( ref mNode , PacketData , ref Index , ref LItem );
}
else if( PInternet.Protocol == Const.IPPROTO_EIGRP )
{
PacketEIGRP.Parser( ref mNode , PacketData , ref Index , ref LItem );
}
}
catch( Exception Ex )
{
mNode.Add( mNodex );
Tmp = "[ Malformed INTERNET packet. Remaining bytes don't fit an INTERNET packet. Possibly due to bad decoding ]";
mNode.Add( Tmp );
Tmp = "[ Exception raised is <" + Ex.GetType().ToString() + "> at packet index <" + Index.ToString() + "> ]";
mNode.Add( Tmp );
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = "[ Malformed INTERNET packet. Remaining bytes don't fit an INTERNET packet. Possibly due to bad decoding ]";
return false;
}
return true;
}
public static bool Parser( byte [] PacketData ,
ref int Index ,
ref ListViewItem LItem ,
ref string TypeInfo ,
ref uint PreviousHttpSequence ,
ref ushort LastTftpPort )
{
string Tmp = "";
PACKET_INTERNET PInternet;
if( ( Index + Const.LENGTH_OF_INTERNET ) > PacketData.Length )
{
Tmp = "[ Malformed INTERNET packet. Remaining bytes don't fit an INTERNET packet. Possibly due to bad decoding ]";
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = Tmp;
return false;
}
try
{
PInternet.Version = PacketData[ Index++ ];
PInternet.HeaderLength = (byte) ( ( (int) PInternet.Version & 0x0f ) * 4 );
PInternet.Version = (byte) ( (int) PInternet.Version >> 4 );
PInternet.DifferentiatedServicesField = PacketData[ Index++ ];
PInternet.Length = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
PInternet.Identification = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
PInternet.FragmentOffset = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
PInternet.Flags = (byte)( (int) PInternet.FragmentOffset >> 12 );
PInternet.FragmentOffset = (ushort) ( (int) PInternet.FragmentOffset & 0x0f );
PInternet.TimeToLive = PacketData[ Index++ ];
PInternet.Protocol = PacketData[ Index++ ];
PInternet.HeaderChecksum = Function.Get2Bytes( PacketData , ref Index , Const.NORMAL );
PInternet.Source = Function.GetIpAddress( PacketData , ref Index );
PInternet.Destination = Function.GetIpAddress( PacketData , ref Index );
LItem.SubItems[ Const.LIST_VIEW_PROTOCOL_INDEX ].Text = "INTERNET";
LItem.SubItems[ Const.LIST_VIEW_SOURCE_INDEX ].Text = PInternet.Source;
LItem.SubItems[ Const.LIST_VIEW_DESTINATION_INDEX ].Text = PInternet.Destination;
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = "Internet packet";
if( PInternet.Protocol == Const.IPPROTO_TCP )
{
TypeInfo = "TCP";
PacketTCP.Parser( PacketData , ref Index , ref LItem , ref PreviousHttpSequence );
}
else if( PInternet.Protocol == Const.IPPROTO_UDP )
{
TypeInfo = "UDP";
PacketUDP.Parser( PacketData , ref Index , ref LItem , ref LastTftpPort );
}
else if( PInternet.Protocol == Const.IPPROTO_ICMP )
{
TypeInfo = "ICMP";
PacketICMP.Parser( PacketData , ref Index , ref LItem );
}
else if( PInternet.Protocol == Const.IPPROTO_EIGRP )
{
PacketEIGRP.Parser( PacketData , ref Index , ref LItem );
}
}
catch
{
LItem.SubItems[ Const.LIST_VIEW_INFO_INDEX ].Text = "[ Malformed INTERNET packet. Remaining bytes don't fit an INTERNET packet. Possibly due to bad decoding ]";
return false;
}
return true;
}
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -