//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
}
//这个是计算校验，把那些类型不一样的全转为16位字节数组用的
public Int32 ipto(ipHeader iph, byte[] Buffer, int size)
{
Int32 rtn = 0;
int index = 0;
byte[] b_verlen = new byte[1];
b_verlen[0] = iph.ip_verlen;
byte[] b_tos = new byte[1];
b_tos[0] = iph.ip_tos;
byte[] b_totallen = BitConverter.GetBytes(iph.ip_totallength);
byte[] b_id = BitConverter.GetBytes(iph.ip_id);
byte[] b_offset = BitConverter.GetBytes(iph.ip_offset);
byte[] b_ttl = new byte[1];
b_ttl[0] = iph.ip_ttl;
byte[] b_protol = new byte[1];
b_protol[0] = iph.ip_protocol;
byte[] b_checksum = BitConverter.GetBytes(iph.ip_checksum);
byte[] b_srcaddr = BitConverter.GetBytes(iph.ip_srcaddr);
byte[] b_destaddr = BitConverter.GetBytes(iph.ip_destaddr);
Array.Copy(b_verlen, 0, Buffer, index, b_verlen.Length);
index += b_verlen.Length;
Array.Copy(b_tos, 0, Buffer, index, b_tos.Length);
index += b_tos.Length;
Array.Copy(b_totallen, 0, Buffer, index, b_totallen.Length);
index += b_totallen.Length;
Array.Copy(b_id, 0, Buffer, index, b_id.Length);
index += b_id.Length;
Array.Copy(b_offset, 0, Buffer, index, b_offset.Length);
index += b_offset.Length;
Array.Copy(b_ttl, 0, Buffer, index, b_ttl.Length);
index += b_ttl.Length;
Array.Copy(b_protol, 0, Buffer, index, b_protol.Length);
index += b_protol.Length;
Array.Copy(b_checksum, 0, Buffer, index, b_checksum.Length);
index += b_checksum.Length;
Array.Copy(b_srcaddr, 0, Buffer, index, b_srcaddr.Length);
index += b_srcaddr.Length;
Array.Copy(b_destaddr, 0, Buffer, index, b_destaddr.Length);
index += b_destaddr.Length;
if (index != size /* sizeof(IcmpPacket) */)
{
rtn = -1;
return(rtn);
}
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
}
//这个是计算校验，把那些类型不一样的全转为16位字节数组用的
public Int32 ipto(ipHeader iph, byte[] Buffer, int size)
{
Int32 rtn = 0;
int index = 0;
byte[] b_verlen = new byte[1];
b_verlen[0] = iph.ip_verlen;
byte[] b_tos = new byte[1];
b_tos[0] = iph.ip_tos;
byte[] b_totallen = BitConverter.GetBytes(iph.ip_totallength);
byte[] b_id = BitConverter.GetBytes(iph.ip_id);
byte[] b_offset = BitConverter.GetBytes(iph.ip_offset);
byte[] b_ttl = new byte[1];
b_ttl[0] = iph.ip_ttl;
byte[] b_protol = new byte[1];
b_protol[0] = iph.ip_protocol;
byte[] b_checksum = BitConverter.GetBytes(iph.ip_checksum);
byte[] b_srcaddr = BitConverter.GetBytes(iph.ip_srcaddr);
byte[] b_destaddr = BitConverter.GetBytes(iph.ip_destaddr);
Array.Copy(b_verlen, 0, Buffer, index, b_verlen.Length);
index += b_verlen.Length;
Array.Copy(b_tos, 0, Buffer, index, b_tos.Length);
index += b_tos.Length;
Array.Copy(b_totallen, 0, Buffer, index, b_totallen.Length);
index += b_totallen.Length;
Array.Copy(b_id, 0, Buffer, index, b_id.Length);
index += b_id.Length;
Array.Copy(b_offset, 0, Buffer, index, b_offset.Length);
index += b_offset.Length;
Array.Copy(b_ttl, 0, Buffer, index, b_ttl.Length);
index += b_ttl.Length;
Array.Copy(b_protol, 0, Buffer, index, b_protol.Length);
index += b_protol.Length;
Array.Copy(b_checksum, 0, Buffer, index, b_checksum.Length);
index += b_checksum.Length;
Array.Copy(b_srcaddr, 0, Buffer, index, b_srcaddr.Length);
index += b_srcaddr.Length;
Array.Copy(b_destaddr, 0, Buffer, index, b_destaddr.Length);
index += b_destaddr.Length;
if (index != size/* sizeof(IcmpPacket) */)
{
rtn = -1;
return rtn;
}
rtn = index;
return rtn;
}