[UnmanagedFunctionPointer(CallingConvention.StdCall, SetLastError = true)]
delegate int Dconnect(IntPtr s, IntPtr addr, int addrsize);
int connect_Hooked(IntPtr s, IntPtr addr, int addrsize)
{
sockaddr_in structure = (sockaddr_in)Marshal.PtrToStructure(addr, typeof(sockaddr_in));
string remoteIp = new System.Net.IPAddress(structure.sin_addr.S_addr).ToString();
if (remoteIp.Contains("121.138.16.15"))
{
SetAddr(addr, "127.0.0.1", "6448");
}
var res = connect(s, addr, addrsize);
//res始终是-1，不知何解？？？？？
return res;
}
public struct sockaddr_in
{
public const int Size = 16;
public short sin_family;
public ushort sin_port;
public struct in_addr
{
public uint S_addr;
public struct _S_un_b
{
public byte s_b1, s_b2, s_b3, s_b4;
}
public _S_un_b S_un_b;
public struct _S_un_w
{
public ushort s_w1, s_w2;
}
public _S_un_w S_un_w;
}
public in_addr sin_addr;
}
private void SetAddr(IntPtr addr, string ip, string port)
{
sockaddr_in structure = (sockaddr_in)Marshal.PtrToStructure(addr, typeof(sockaddr_in));
structure.sin_addr.S_addr = inet_addr(ip);
structure.sin_port = htons(Convert.ToUInt16(port));
Marshal.StructureToPtr(structure, addr, true);
structure = (sockaddr_in)Marshal.PtrToStructure(addr, typeof(sockaddr_in));
}
