public static Ipv4Header Create(byte[] ipv4Packet, ref int bytesCopied)
{
var ipv4Header = new Ipv4Header();
if (ipv4Packet.Length < Ipv4HeaderLength)
{
return(null);
}
ipv4Header.Version = (byte)((ipv4Packet[0] >> 4) & 0xF);
ipv4Header.ipLength = (byte)(ipv4Packet[0] & 0xF);
ipv4Header.TypeOfService = ipv4Packet[1];
ipv4Header.ipTotalLength = BitConverter.ToUInt16(ipv4Packet, 2);
ipv4Header.ipId = BitConverter.ToUInt16(ipv4Packet, 4);
ipv4Header.ipOffset = BitConverter.ToUInt16(ipv4Packet, 6);
ipv4Header.Ttl = ipv4Packet[8];
ipv4Header.Protocol = ipv4Packet[9];
ipv4Header.ipChecksum = BitConverter.ToUInt16(ipv4Packet, 10);
ipv4Header.SourceAddress = new IPAddress(BitConverter.ToUInt32(ipv4Packet, 12));
ipv4Header.DestinationAddress = new IPAddress(BitConverter.ToUInt32(ipv4Packet, 16));
bytesCopied = ipv4Header.Length;
return(ipv4Header);
}
public UdpHeader()
{
srcPort = 0;
destPort = 0;
udpLength = 0;
udpChecksum = 0;
Ipv6PacketHeader = null;
Ipv4PacketHeader = null;
}