private byte[] _requestSocks4(TypeSocks tSocks)
{
byte[] bRequest = new byte[300];
bRequest[0] = (byte)tSocks;
bRequest[1] = (byte)OperationSocks.Connect;
return(bRequest);
}
/// <summary>
/// Create request for Socks4/Socks5
/// </summary>
/// <param name="tSocks">Type Socks</param>
/// <param name="username">For auth Socks4</param>
/// <returns></returns>
private byte[] _requestSocks(TypeSocks tSocks, string username = "")
{
byte[] bRequest = new byte[50];
var port = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)80));
bRequest[0] = (byte)tSocks;
bRequest[1] = (byte)OperationSocks.Connect;
if (tSocks == TypeSocks.Socks5)
{
bRequest[2] = 0x00;
bRequest[3] = (byte)TypeAddressSocks.HostName;
var hostName = Encoding.ASCII.GetBytes("google.com");
bRequest[4] = (byte)hostName.Length;
Array.Copy(hostName, 0, bRequest, 5, hostName.Length);
bRequest[5 + hostName.Length] = port[0];
bRequest[6 + hostName.Length] = port[1];
}
else
{
bRequest[2] = port[0];
bRequest[3] = port[1];
var ip = Encoding.ASCII.GetBytes("173.194.32.191");
bRequest[4] = ip[0];
bRequest[5] = ip[1];
bRequest[6] = ip[2];
bRequest[7] = ip[3];
if (string.IsNullOrEmpty(username))
{
bRequest[8] = 0;
}
else
{
var bUser = Encoding.ASCII.GetBytes(username);
Array.Copy(bUser, 0, bRequest, 8, bUser.Length);
bRequest[8 + bUser.Length] = 0;
}
}
return(bRequest);
}
/// <summary>
/// Определяет тип Socks по IP и порту
/// </summary>
/// <param name="ip"></param>
/// <param name="port"></param>
/// <returns>Возвращает тип Socks - Socks4 или Socks5</returns>
public static TypeSocks GetTypeSocks(IPEndPoint ipEnd)
{
var type = TypeSocks.Error;
if (PingIp(ipEnd.Address))
{
Socket socket = new Socket(ipEnd.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
{
SendTimeout = 7000, ReceiveTimeout = 7000
};
try
{
socket.Connect(ipEnd);
}
catch (SocketException ex)
{
socket.Close();
}
if (socket.Connected)
{
byte[] bSend = new byte[11];
byte[] bReceived = new byte[20];
bSend[0] = (byte)TypeSocks.Socks5;
bSend[1] = 0x01; // connection
bSend[2] = (byte)AuthSocks.NonAuth;
try
{
//Сначала проверяем на Socks5
socket.Send(bSend, 0, 3, SocketFlags.None);
socket.Receive(bReceived, bReceived.Length, 0);
TypeSocks.TryParse(bReceived[0].ToString(), out type);
if (TypeSocks.Socks5 != type)
{
socket.Close();
Thread.Sleep(10000);
//Проверяем на Socks4
bReceived = new byte[10];
socket = new Socket(ipEnd.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
{
SendTimeout = 7000,
ReceiveTimeout = 7000
};
try
{
socket.Connect(ipEnd);
}
catch (SocketException ex)
{
socket.Close();
}
if (socket.Connected)
{
var bPort = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)80));
bSend[0] = (byte)TypeSocks.Socks4;
bSend[2] = bPort[0];
bSend[3] = bPort[1];
var bIP = IPAddress.Parse("173.194.32.191").GetAddressBytes();
bSend[4] = bIP[0];
bSend[5] = bIP[1];
bSend[6] = bIP[2];
bSend[7] = bIP[3];
bSend[8] = 0x00;
socket.Send(bSend, 0, 9, SocketFlags.None);
socket.Receive(bReceived, bReceived.Length, 0);
if (bReceived[1] == 90)
{
type = TypeSocks.Socks4;
}
}
}
}
catch
{
}
finally
{
socket.Close();
}
}
}
return(type);
}
