//这个使用来计算校验码的我照抄c#实现ping那文章的方法，反正ip协议计算校验码方法都一样
public syn(uint _ip, ushort _port, EndPoint _ep, Random _rand)
{
ip = _ip;
port = _port;
ep = _ep;
rand = _rand;
ipHeader iph = new ipHeader();
psh = new psdHeader();
tch = new tcpHeader();
sock = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, 1);
//这2个挺重要，必须这样才可以自己提供ip头
}
//这个是把tcp伪首部转为字节数组用的
public Int32 tchto(tcpHeader tch, byte[] buffer, int size)
{
Int32 rtn;
int index = 0;
byte[] b_tch_sport = BitConverter.GetBytes(tch.th_sport);
byte[] b_tch_dport = BitConverter.GetBytes(tch.th_dport);
byte[] b_tch_seq = BitConverter.GetBytes(tch.th_seq);
byte[] b_tch_ack = BitConverter.GetBytes(tch.th_ack);
byte[] b_tch_lenres = new byte[1];
b_tch_lenres[0] = tch.th_lenres;
byte[] b_tch_flag = new byte[1];
b_tch_flag[0] = tch.th_flag;
byte[] b_tch_win = BitConverter.GetBytes(tch.th_win);
byte[] b_tch_sum = BitConverter.GetBytes(tch.th_sum);
byte[] b_tch_urp = BitConverter.GetBytes(tch.th_urp);
Array.Copy(b_tch_sport, 0, buffer, index, b_tch_sport.Length);
index += b_tch_sport.Length;
Array.Copy(b_tch_dport, 0, buffer, index, b_tch_dport.Length);
index += b_tch_dport.Length;
Array.Copy(b_tch_seq, 0, buffer, index, b_tch_seq.Length);
index += b_tch_seq.Length;
Array.Copy(b_tch_ack, 0, buffer, index, b_tch_ack.Length);
index += b_tch_ack.Length;
Array.Copy(b_tch_lenres, 0, buffer, index, b_tch_lenres.Length);
index += b_tch_lenres.Length;
Array.Copy(b_tch_flag, 0, buffer, index, b_tch_flag.Length);
index += b_tch_flag.Length;
Array.Copy(b_tch_win, 0, buffer, index, b_tch_win.Length);
index += b_tch_win.Length;
Array.Copy(b_tch_sum, 0, buffer, index, b_tch_sum.Length);
index += b_tch_sum.Length;
Array.Copy(b_tch_urp, 0, buffer, index, b_tch_urp.Length);
index += b_tch_urp.Length;
if (index != size)
{
rtn = -1;
return(rtn);
}
else
{
rtn = index;
return(rtn);
}
}
//这个使用来计算校验码的我照抄c#实现ping那文章的方法，反正ip协议计算校验码方法都一样
public syn(uint _ip, ushort _port, EndPoint _ep, Random _rand)
{
ip = _ip;
port = _port;
ep = _ep;
rand = _rand;
ipHeader iph = new ipHeader();
psh = new psdHeader();
tch = new tcpHeader();
sock = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, 1);
//这2个挺重要，必须这样才可以自己提供ip头
}
//这个是把tcp伪首部转为字节数组用的
public Int32 tchto(tcpHeader tch, byte[] buffer, int size)
{
Int32 rtn;
int index = 0;
byte[] b_tch_sport = BitConverter.GetBytes(tch.th_sport);
byte[] b_tch_dport = BitConverter.GetBytes(tch.th_dport);
byte[] b_tch_seq = BitConverter.GetBytes(tch.th_seq);
byte[] b_tch_ack = BitConverter.GetBytes(tch.th_ack);
byte[] b_tch_lenres = new byte[1];
b_tch_lenres[0] = tch.th_lenres;
byte[] b_tch_flag = new byte[1];
b_tch_flag[0] = tch.th_flag;
byte[] b_tch_win = BitConverter.GetBytes(tch.th_win);
byte[] b_tch_sum = BitConverter.GetBytes(tch.th_sum);
byte[] b_tch_urp = BitConverter.GetBytes(tch.th_urp);
Array.Copy(b_tch_sport, 0, buffer, index, b_tch_sport.Length);
index += b_tch_sport.Length;
Array.Copy(b_tch_dport, 0, buffer, index, b_tch_dport.Length);
index += b_tch_dport.Length;
Array.Copy(b_tch_seq, 0, buffer, index, b_tch_seq.Length);
index += b_tch_seq.Length;
Array.Copy(b_tch_ack, 0, buffer, index, b_tch_ack.Length);
index += b_tch_ack.Length;
Array.Copy(b_tch_lenres, 0, buffer, index, b_tch_lenres.Length);
index += b_tch_lenres.Length;
Array.Copy(b_tch_flag, 0, buffer, index, b_tch_flag.Length);
index += b_tch_flag.Length;
Array.Copy(b_tch_win, 0, buffer, index, b_tch_win.Length);
index += b_tch_win.Length;
Array.Copy(b_tch_sum, 0, buffer, index, b_tch_sum.Length);
index += b_tch_sum.Length;
Array.Copy(b_tch_urp, 0, buffer, index, b_tch_urp.Length);
index += b_tch_urp.Length;
if (index != size)
{
rtn = -1;
return rtn;
}
else
{
rtn = index;
return rtn;
}
}