public static bool Parser(byte [] PacketData,
ref int Index,
ref ListViewItem LItem, ref string TypeInfo,
ref uint PreviousHttpSequence,
ref ushort LastTftpPort)
{
PACKET_LLC PLlc;
bool IsSnap = false;
try
{
PLlc.DSAP = PacketData[Index++];
PLlc.SSAP = PacketData[Index++];
IsSnap = (PLlc.DSAP == Const.LLC_TYPE_SNAP) && (PLlc.SSAP == Const.LLC_TYPE_SNAP) ? true : false;
PLlc.ControlField = (ushort)PacketData[Index++];
if ((PLlc.ControlField & 0xfc) != Const.XDLC_U)
{
PLlc.ControlField *= 256;
PLlc.ControlField += (ushort)PacketData[Index++];
}
if (IsSnap)
{
PLlc.OrganizationCode = Function.Get3Bytes(PacketData, ref Index, Const.NORMAL);
PLlc.ProtocolId = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
}
LItem.SubItems[Const.LIST_VIEW_PROTOCOL_INDEX].Text = "LLC";
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "Logical link control protocol";
PLlc.OrganizationCode = 0;
if (IsSnap)
{
switch (PLlc.OrganizationCode)
{
case Const.OUI_ENCAP_ETHER:
case Const.OUI_CISCO_90:
case Const.OUI_APPLE_ATALK:
//capture_ethertype(etype, pd, offset+8, len, ld);
//PacketETHERNET.Parser( PacketData , ref Index , ref LItem , ref PreviousHttpSequence , ref LastTftpPort );
break;
case Const.OUI_CISCO:
PacketCDP.Parser(PacketData, ref Index, ref LItem);
break;
default: break;
}
}
else
{
// non-SNAP
switch (PLlc.DSAP)
{
case Const.LLCSAP_IP:
PacketINTERNET.Parser(PacketData, ref Index, ref LItem, ref TypeInfo, ref PreviousHttpSequence, ref LastTftpPort);
break;
case Const.LLC_TYPE_NOVELL_NETWARE:
TypeInfo = "IPX";
PacketIPX.Parser(PacketData, ref Index, ref LItem);
break;
case Const.LLC_TYPE_IBM_NETBIOS:
TypeInfo = "NetBIOS";
PacketNETBIOS.Parser(PacketData, ref Index, ref LItem);
break;
case Const.LLC_TYPE_STP:
PacketSTP.Parser(PacketData, ref Index, ref LItem);
break;
default:
break;
}
}
}
catch
{
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "[ Malformed LLC packet. Remaining bytes don't fit an LLC packet. Possibly due to bad decoding ]";
return(false);
}
return(true);
}
public static bool Parser(ref TreeNodeCollection mNode,
byte [] PacketData,
ref int Index,
ref ListViewItem LItem,
ref uint PreviousHttpSequence,
ref ushort LastTftpPort)
{
TreeNode mNodex;
string Tmp = "";
PACKET_LLC PLlc;
bool UNFrame, IsSnap = false;
int kk = 0;
mNodex = new TreeNode();
mNodex.Text = "LLC ( Logical Link Control Protocol )";
kk = Index;
try
{
PLlc.DSAP = PacketData[Index++];
Tmp = "DSAP : " + Function.ReFormatString(PLlc.DSAP, GetLLCTypeString(PLlc.DSAP));
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 1, 1, false);
PLlc.SSAP = PacketData[Index++];
Tmp = "SSAP : " + Function.ReFormatString(PLlc.SSAP, GetLLCTypeString(PLlc.SSAP));
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 1, 1, false);
IsSnap = (PLlc.DSAP == Const.LLC_TYPE_SNAP) && (PLlc.SSAP == Const.LLC_TYPE_SNAP) ? true : false;
PLlc.ControlField = (ushort)PacketData[Index++];
UNFrame = true;
if ((PLlc.ControlField & Const.XDLC_U) != Const.XDLC_U)
{
PLlc.ControlField *= 256;
PLlc.ControlField += (ushort)PacketData[Index++];
UNFrame = false;
}
Tmp = "Control Field : " + Function.ReFormatString(PLlc.ControlField, null);
mNodex.Nodes.Add(Tmp);
if (UNFrame)
{
Function.SetPosition(ref mNodex, Index - 1, 1, false);
}
else
{
Function.SetPosition(ref mNodex, Index - 2, 2, false);
}
PLlc.OrganizationCode = 0;
if (IsSnap)
{
PLlc.OrganizationCode = Function.Get3Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Organization Code : " + Function.ReFormatString(PLlc.OrganizationCode, null);
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 3, 3, false);
PLlc.ProtocolId = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Protocol Id : " + Function.ReFormatString(PLlc.ProtocolId, null);
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 2, 2, false);
}
LItem.SubItems[Const.LIST_VIEW_PROTOCOL_INDEX].Text = "LLC";
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "Logical link control protocol";
Function.SetPosition(ref mNodex, kk, Index - kk, true);
mNode.Add(mNodex);
if (IsSnap)
{
switch (PLlc.OrganizationCode)
{
case Const.OUI_ENCAP_ETHER:
case Const.OUI_CISCO_90:
case Const.OUI_APPLE_ATALK:
//capture_ethertype(etype, pd, offset+8, len, ld);
//PacketETHERNET.Parser( ref mNode , PacketData , ref LItem , ref PreviousHttpSequence , ref LastTftpPort );
break;
case Const.OUI_CISCO:
PacketCDP.Parser(ref mNode, PacketData, ref Index, ref LItem);
break;
default: break;
}
}
else
{
// non-SNAP
switch (PLlc.DSAP)
{
case Const.LLCSAP_IP:
PacketINTERNET.Parser(ref mNode, PacketData, ref Index, ref LItem, ref PreviousHttpSequence, ref LastTftpPort);
break;
case Const.LLC_TYPE_NOVELL_NETWARE:
PacketIPX.Parser(ref mNode, PacketData, ref Index, ref LItem);
break;
case Const.LLC_TYPE_IBM_NETBIOS:
PacketNETBIOS.Parser(ref mNode, PacketData, ref Index, ref LItem);
break;
case Const.LLC_TYPE_STP:
PacketSTP.Parser(ref mNode, PacketData, ref Index, ref LItem);
break;
default:
break;
}
}
}
catch (Exception Ex)
{
mNode.Add(mNodex);
Tmp = "[ Malformed LLC packet. Remaining bytes don't fit an LLC 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 LLC packet. Remaining bytes don't fit an LLC packet. Possibly due to bad decoding ]";
return(false);
}
return(true);
}