public TCPPacket(byte[] buffer)
{
try
{
SourcePort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 0));
DestinationPort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 2));
ushort offsetAndFlags = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 12));
DataOffset = (byte)((offsetAndFlags >> 12) * 4);
Flags = (TCPFlags)(offsetAndFlags & 511); // 0b111111111 = 511
Payload = buffer.Skip(DataOffset).ToArray();
IsValid = true;
}
catch (Exception ex)
{
SourcePort = 0;
DestinationPort = 0;
DataOffset = 0;
Flags = TCPFlags.NONE;
Payload = null;
IsValid = false;
Log.Ex(ex, "TCP 패킷 파싱 에러");
}
}
public TCPPacket(byte[] buffer, int ignoreLength)
{
try
{
GlobalOffset = ignoreLength;
SourcePort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, ignoreLength + 0));
DestinationPort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, ignoreLength + 2));
var offsetAndFlags = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, ignoreLength + 12));
DataOffset = (byte)((offsetAndFlags >> 12) * 4);
Flags = (TCPFlags)(offsetAndFlags & 511); // 0b111111111 = 511
Payload = buffer.Skip(ignoreLength + DataOffset).ToArray();
IsValid = true;
}
catch
{
SourcePort = 0;
DestinationPort = 0;
DataOffset = 0;
Flags = TCPFlags.NONE;
Payload = null;
IsValid = false;
IpcClient.SendSignal(Signal.ClientPacketParseFail, new[] { "unable to tcplize" }, true);
}
}
public TCPPacket(byte[] buffer)
{
try
{
SourcePort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 0));
DestinationPort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 2));
SequenceNumber = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer, 4));
AcknowledgementNumber = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer, 8));
ushort offsetAndFlags = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 12));
DataOffset = (byte)((offsetAndFlags >> 12) * 4);
Flags = (TCPFlags)(offsetAndFlags & 511); // 0b111111111 = 511
Window = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 14));
Checksum = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 16));
UrgentPointer = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 18));
Payload = new byte[buffer.Length - DataOffset];
Buffer.BlockCopy(buffer, DataOffset, Payload, 0, Payload.Length);
IsValid = true;
}
catch
{
SourcePort = 0;
DestinationPort = 0;
SequenceNumber = 0;
AcknowledgementNumber = 0;
DataOffset = 0;
Flags = TCPFlags.NONE;
Window = 0;
Checksum = 0;
UrgentPointer = 0;
Payload = null;
IsValid = false;
}
}
public TCPPacket(byte[] buffer)
{
try
{
SourcePort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 0));
DestinationPort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 2));
SequenceNumber = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer, 4));
AcknowledgementNumber = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer, 8));
ushort offsetAndFlags = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 12));
DataOffset = (byte)((offsetAndFlags >> 12) * 4);
Flags = (TCPFlags)(offsetAndFlags & 511); // 0b111111111 = 511
Window = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 14));
Checksum = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 16));
UrgentPointer = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 18));
Payload = new byte[buffer.Length - DataOffset];
Buffer.BlockCopy(buffer, DataOffset, Payload, 0, Payload.Length);
IsValid = true;
}
catch
{
SourcePort = 0;
DestinationPort = 0;
SequenceNumber = 0;
AcknowledgementNumber = 0;
DataOffset = 0;
Flags = TCPFlags.NONE;
Window = 0;
Checksum = 0;
UrgentPointer = 0;
Payload = null;
IsValid = false;
}
}
public TCPPacket(byte[] buffer)
{
try
{
SourcePort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 0));
DestinationPort = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 2));
ushort offsetAndFlags = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, 12));
DataOffset = (byte)((offsetAndFlags >> 12) * 4);
Flags = (TCPFlags)(offsetAndFlags & 511); // 0b111111111 = 511
Payload = buffer.Skip(DataOffset).ToArray();
IsValid = true;
}
catch (Exception ex)
{
SourcePort = 0;
DestinationPort = 0;
DataOffset = 0;
Flags = TCPFlags.NONE;
Payload = null;
IsValid = false;
Log.Ex(ex, "TCP 패킷 파싱 에러");
}
}
