模拟TCP通信协议

public struct IP_Head
{
public char headlength ;
public char version;
public char tos;

public short total_len;
public short identifier;
public char ttl;
public char protocal;
public short checknum;
public long sourceIP;
public long destIP;

}

public struct ICMP_Header
{
byte type;
byte code;
short cknum;
short id;
short seq;
}