public void Start()
{
DoAsyncRead();
if (SocksVersion == 4)
{
MethodSelectionsVersionFourMessage msg = new MethodSelectionsVersionFourMessage();
msg.SOCKS4CommandCode = SOCKS4CommandCode.TCPStream;
msg.DomainName = RemoteHost;
msg.DestinationPort = (ushort)RemotePort;
msg.UserId = User;
msg.Version = 0x04;
byte[] bMsg = msg.GetBytes();
Send(bMsg);
}
else if (SocksVersion == 5)
{
SOCKS5ClientSessionState = SOCKS5ClientSessionState.WaitingForMethodSelected;
MethodSelectionsMessage msg = new MethodSelectionsMessage();
msg.Version = 0x05;
msg.Methods.Add(SockMethod.NoAuthenticationRequired);
byte[] bMsg = msg.GetBytes();
Send(bMsg);
}
else
{
}
}
public void Start()
{
DoAsyncRead();
if (SocksVersion == 4)
{
MethodSelectionsVersionFourMessage msg = new MethodSelectionsVersionFourMessage();
msg.SOCKS4CommandCode = SOCKS4CommandCode.TCPStream;
msg.DomainName = RemoteHost;
msg.DestinationPort = (ushort)RemotePort;
msg.UserId = User;
msg.Version = 0x04;
byte[] bMsg = msg.GetBytes();
Send(bMsg);
}
else if (SocksVersion == 5)
{
SOCKS5ClientSessionState = SOCKS5ClientSessionState.WaitingForMethodSelected;
MethodSelectionsMessage msg = new MethodSelectionsMessage();
msg.Version = 0x05;
msg.Methods.Add(SockMethod.NoAuthenticationRequired);
byte[] bMsg = msg.GetBytes();
Send(bMsg);
}
else
{
}
}
public bool HandleReceiveData(byte[] bRecv)
{
ReceiveBuffer.AppendData(bRecv);
byte[] bAllData = ReceiveBuffer.PeekAllSamples();
/// Recieve our response
///
if (SocksVersion == 4)
{
MethodSelectedVersionFourMessage msg = new MethodSelectedVersionFourMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SOCKS4Status == SOCKS4Status.RequestGranted)
{
return true;
}
else
{
throw new Exception("Failed to negotiate a SOCKS4 session");
}
}
return false;
}
else if (SocksVersion == 5)
{
if (SOCKS5ClientSessionState == SOCKS5ClientSessionState.WaitingForMethodSelected)
{
MethodSelectedMessage msg = new MethodSelectedMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SockMethod != SockMethod.NoAuthenticationRequired)
{
throw new Exception("Failed to negotiate a SOCKS5 session");
}
SOCKS5ClientSessionState = SOCKS5ClientSessionState.WaitingForFinalResponse;
/// We're happy, send our connect request
SocksRequestMessage req = new SocksRequestMessage();
req.AddressType = AddressType.DomainName;
req.DestinationDomain = RemoteHost;
req.DestinationPort = (ushort)RemotePort;
req.Version = 0x05;
req.SOCKSCommand = SOCKSCommand.Connect;
byte[] bMsg = req.GetBytes();
Send(bMsg);
}
return false;
}
else if (SOCKS5ClientSessionState == SOCKS5ClientSessionState.WaitingForFinalResponse)
{
SocksReplyMessage msg = new SocksReplyMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SOCKSReply == SOCKSReply.Succeeded)
{
return true;
}
else
{
throw new Exception(string.Format("Failed to negotiate a SOCKS5 session, error: {0}", msg.SOCKSReply));
}
}
return false;
}
return false;
}
else
{
throw new Exception("Unsupported Version");
}
}
public bool HandleReceiveData(byte[] bRecv)
{
ReceiveBuffer.AppendData(bRecv);
byte[] bAllData = ReceiveBuffer.PeekAllSamples();
/// Recieve our response
///
if (SocksVersion == 4)
{
MethodSelectedVersionFourMessage msg = new MethodSelectedVersionFourMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SOCKS4Status == SOCKS4Status.RequestGranted)
{
return(true);
}
else
{
throw new Exception("Failed to negotiate a SOCKS4 session");
}
}
return(false);
}
else if (SocksVersion == 5)
{
if (SOCKS5ClientSessionState == SOCKS5ClientSessionState.WaitingForMethodSelected)
{
MethodSelectedMessage msg = new MethodSelectedMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SockMethod != SockMethod.NoAuthenticationRequired)
{
throw new Exception("Failed to negotiate a SOCKS5 session");
}
SOCKS5ClientSessionState = SOCKS5ClientSessionState.WaitingForFinalResponse;
/// We're happy, send our connect request
SocksRequestMessage req = new SocksRequestMessage();
req.AddressType = AddressType.DomainName;
req.DestinationDomain = RemoteHost;
req.DestinationPort = (ushort)RemotePort;
req.Version = 0x05;
req.SOCKSCommand = SOCKSCommand.Connect;
byte[] bMsg = req.GetBytes();
Send(bMsg);
}
return(false);
}
else if (SOCKS5ClientSessionState == SOCKS5ClientSessionState.WaitingForFinalResponse)
{
SocksReplyMessage msg = new SocksReplyMessage();
int nRead = msg.ReadFromBytes(bAllData, 0);
if (nRead > 0)
{
ReceiveBuffer.GetNSamples(nRead);
if (msg.SOCKSReply == SOCKSReply.Succeeded)
{
return(true);
}
else
{
throw new Exception(string.Format("Failed to negotiate a SOCKS5 session, error: {0}", msg.SOCKSReply));
}
}
return(false);
}
return(false);
}
else
{
throw new Exception("Unsupported Version");
}
}
