internal NetBiosDatagramServicePacket(Frame parentFrame, int packetStartIndex, int packetEndIndex)
: base(parentFrame, packetStartIndex, packetEndIndex, "NetBIOS Datagram Service")
{
this.messageType = parentFrame.Data[packetStartIndex];
this.flags = new Flags(parentFrame.Data[packetStartIndex + 1]);
this.datagramID = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 2);
this.sourceIP = Utils.ByteConverter.ToUInt32(parentFrame.Data, packetStartIndex + 4);
this.sourcePort = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 8);
//here we have to check the messageType to know the format of the rest of the packet...
if (messageType == (byte)MessageType.DirectUniqueDatagram || messageType == (byte)MessageType.DirectGroupDatagram || messageType == (byte)MessageType.BroadcastDatagram)
{
this.datagramLength = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 10);
this.packetOffset = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 12);
int index = packetStartIndex + 14;
this.sourceName = NetBiosPacket.DecodeNetBiosName(parentFrame, ref index);
this.destinationName = NetBiosPacket.DecodeNetBiosName(parentFrame, ref index);
//skip user data...for now at least
if (index + 32 <= packetStartIndex + this.datagramLength && (messageType == (byte)MessageType.DirectUniqueDatagram || messageType == (byte)MessageType.DirectGroupDatagram))
{
//parse SMB
smbPacketIndex = index;
}
}
else if (messageType == (byte)MessageType.DatagramError)
{
//do nothing at this state
}
else if (messageType == (byte)MessageType.DatagramQueryRequest || messageType == (byte)MessageType.DatagramPositiveQueryResponse || messageType == (byte)MessageType.DatagramNegativeQueryResponse)
{
int index = packetStartIndex + 10;
this.destinationName = NetBiosPacket.DecodeNetBiosName(parentFrame, ref index);
}
}
internal NetBiosNameServicePacket(Frame parentFrame, int packetStartIndex, int packetEndIndex)
: base(parentFrame, packetStartIndex, packetEndIndex, "NetBIOS Name Service")
{
//header
this.transactionID = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex);
this.headerFlags = new HeaderFlags(Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 2));
this.questionCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 4);
this.answerCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 6);
this.authorityCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 8);
this.additionalCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 10);
int i = packetStartIndex + 12;
this.questionNameDecoded = null;
for (int q = 0; q < questionCount; q++)//I'll just assume that there is only one question... otherwise it will be overwritten
//get a NetBIOS name label
{
this.questionNameDecoded = NetBiosPacket.DecodeNetBiosName(parentFrame, ref i);
//Get Question Type
this.questionType = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//Get Question Class
this.questionClass = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
}
this.answerNameDecoded = null;
this.answerAddress = new System.Net.IPAddress((long)0);
//ANSWER RESOURCE RECORDS
for (int a = 0; a < answerCount; a++)
{
this.answerNameDecoded = NetBiosPacket.DecodeNetBiosName(parentFrame, ref i);
//Get Question Type
this.answerType = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//Get Question Class
this.answerClass = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//TTL
this.answerTTL = Utils.ByteConverter.ToUInt32(parentFrame.Data, i);
i += 4;
//data length
this.answerDataLength = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//flags
this.answerFlags = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//addr
byte[] ipBytes = new byte[4];//IP4...
Array.Copy(parentFrame.Data, i, ipBytes, 0, ipBytes.Length);
this.answerAddress = new System.Net.IPAddress(ipBytes);
i += 4;
}
//this one is not quite finished yeat...
//AUTHORITY RESOURCE RECORDS
}
internal ResourceRecord(NetBiosNameServicePacket nbnsPacket, ref int offset)
{
this.Name = NetBiosPacket.DecodeNetBiosName(nbnsPacket.ParentFrame, ref offset, nbnsPacket);
this.Type = Utils.ByteConverter.ToUInt16(nbnsPacket.ParentFrame.Data, offset);
offset += 2;
this.Class = Utils.ByteConverter.ToUInt16(nbnsPacket.ParentFrame.Data, offset);
offset += 2;
this.TTL = Utils.ByteConverter.ToUInt32(nbnsPacket.ParentFrame.Data, offset);
offset += 4;
ushort dataLength = Utils.ByteConverter.ToUInt16(nbnsPacket.ParentFrame.Data, offset);
offset += 2;
this.Data = new ArraySegment <byte>(nbnsPacket.ParentFrame.Data, offset, dataLength);
offset += dataLength;
}
private (string name, ushort type, ushort nbnsClass, uint ttl, byte[] data) GetResourceRecord(Frame parentFrame, ref int offset)
{
/**
* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* / RR_NAME /
* / /
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RR_TYPE | RR_CLASS |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | TTL |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RDLENGTH | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
* / /
* / RDATA /
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
**/
string name = NetBiosPacket.DecodeNetBiosName(parentFrame, ref offset, this);
ushort nbnsType = Utils.ByteConverter.ToUInt16(parentFrame.Data, offset);
offset += 2;
ushort nbnsClass = Utils.ByteConverter.ToUInt16(parentFrame.Data, offset);
offset += 2;
uint ttl = Utils.ByteConverter.ToUInt32(parentFrame.Data, offset);
offset += 4;
ushort dataLenght = Utils.ByteConverter.ToUInt16(parentFrame.Data, offset);
offset += 2;
byte[] data = new byte[dataLenght];
Array.Copy(parentFrame.Data, offset, data, 0, dataLenght);
offset += dataLenght;
return(name, nbnsType, nbnsClass, ttl, data);
}
internal NetBiosNameServicePacket(Frame parentFrame, int packetStartIndex, int packetEndIndex)
: base(parentFrame, packetStartIndex, packetEndIndex, "NetBIOS Name Service")
{
this.AnswerResourceRecords = new List <ResourceRecord>();
this.AuthorityResourceRecords = new List <ResourceRecord>();
this.AdditionalResourceRecords = new List <ResourceRecord>();
//header
this.transactionID = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex);
this.Flags = new HeaderFlags(Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 2));
this.questionCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 4);
this.answerCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 6);
this.authorityCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 8);
this.additionalCount = Utils.ByteConverter.ToUInt16(parentFrame.Data, packetStartIndex + 10);
int i = packetStartIndex + 12;
this.questionNameDecoded = null;
for (int q = 0; q < questionCount; q++)//I'll just assume that there is only one question... otherwise it will be overwritten
//get a NetBIOS name label
{
this.questionNameDecoded = NetBiosPacket.DecodeNetBiosName(parentFrame, ref i, this);
//Get Question Type
this.questionType = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
//Get Question Class
this.questionClass = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
i += 2;
}
//this.answerNameDecoded=null;
//this.answerAddress=new System.Net.IPAddress((long)0);
//ANSWER RESOURCE RECORDS
for (int a = 0; a < answerCount; a++)
{
this.AnswerResourceRecords.Add(new ResourceRecord(this, ref i));
/*
* this.answerNameDecoded=NetBiosPacket.DecodeNetBiosName(parentFrame, ref i, this);
* //Get Question Type
* this.answerType = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
* i+=2;
* //Get Question Class
* this.answerClass = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
* i+=2;
* //TTL
* this.answerTTL = Utils.ByteConverter.ToUInt32(parentFrame.Data, i);
* i+=4;
* //data length
* this.answerDataLength = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
* i+=2;
* //flags
* this.answerFlags = Utils.ByteConverter.ToUInt16(parentFrame.Data, i);
* i+=2;
* //addr
* byte[] ipBytes=new byte[4];//IP4...
* Array.Copy(parentFrame.Data, i, ipBytes, 0, ipBytes.Length);
* this.answerAddress=new System.Net.IPAddress(ipBytes);
* i+=4;
*/
}
for (int a = 0; a < authorityCount; a++)
{
this.AuthorityResourceRecords.Add(new ResourceRecord(this, ref i));
}
for (int a = 0; a < this.additionalCount; a++)
{
this.AdditionalResourceRecords.Add(new ResourceRecord(this, ref i));
//var rr = this.GetResourceRecord(parentFrame, ref i);
}
}
