private void I_OnPacketArrival(object sender, CaptureEventArgs e)
{
int len = 0;
TCPUDP protocol = TCPUDP.TCP;
PacketAddress address = Tool.GetPacketAddressFromRowPacket(e.Packet, ref len, ref protocol);
if (address != null && len != 0)
{
PacketFlow packetFlow = networkStructure.GetPacketFlow(address);
packetFlow.protocol = protocol;
uploadDownloadMap.AddPacket(packetFlow, len);
}
}
public Port(uint ip, ushort port, TCPUDP protocol)
{
this.ip = ip;
this.port = port;
this.protocol = protocol;
}
/// <summary>
/// Get the packet Information from <see cref="RawCapture"/>
/// </summary>
/// <param name="rawCapture">The raw captured packet</param>
/// <param name="len">Get the length of bytes of the packet</param>
/// <param name="protocol">Get the tansport protocol of the packet</param>
/// <returns>The Addresses of the packet. Null if the packet has error, or it's not IP packet, or It's IPV6.</returns>
public static PacketAddress GetPacketAddressFromRowPacket(RawCapture rawCapture, ref int len, ref TCPUDP protocol)
{
try
{
Packet p = Packet.ParsePacket(rawCapture.LinkLayerType, rawCapture.Data);
IpPacket ipPacket = (IpPacket)p.Extract(typeof(IpPacket));
if (ipPacket != null)
{
len = ipPacket.PayloadLength;
IPAddress sourceAddress, destinationAddress;
sourceAddress = ipPacket.SourceAddress;
destinationAddress = ipPacket.DestinationAddress;
if (sourceAddress.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork &&
destinationAddress.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
IPProtocolType type = ipPacket.NextHeader;
if (type == IPProtocolType.TCP)
{
TcpPacket tcpPacket = (TcpPacket)ipPacket.Extract(typeof(TcpPacket));
if (tcpPacket != null)
{
protocol = TCPUDP.TCP;
return(new PacketAddress(sourceAddress, tcpPacket.SourcePort, destinationAddress, tcpPacket.DestinationPort));
}
}
else if (type == IPProtocolType.UDP)
{
UdpPacket udpPacket = (UdpPacket)ipPacket.Extract(typeof(UdpPacket));
if (udpPacket != null)
{
protocol = TCPUDP.UDP;
return(new PacketAddress(sourceAddress, udpPacket.SourcePort, destinationAddress, udpPacket.DestinationPort));
}
}
}
}
return(null);
}
catch (Exception)
{
Console.WriteLine("Packet Error");
//Console.WriteLine(e.Message + "\n" + e.StackTrace);
return(null);
}
}