public Socket Accept()
{
byte[] response = new byte[262];
if (_socket.Receive(response) < 10)
{
throw new SocksClientException("The connection was reset by the remote peer.");
}
if (response[0] != SocksClient.SOCKS_VERSION)
{
throw new SocksClientException("Socks version 5 is not supported by the proxy server.");
}
SocksReplyCode reply = (SocksReplyCode)response[1];
if (reply != SocksReplyCode.Succeeded)
{
throw new SocksClientException("Socks proxy server request failed: " + reply.ToString());
}
_dstEP = SocksClient.ParseEndpoint(response, 3);
return(_socket);
}
public int ReceiveFrom(byte[] buffer, int offset, int size, out EndPoint remoteEP)
{
byte[] datagram = new byte[262 + size];
EndPoint dummyEP = new IPEndPoint(IPAddress.Any, 0);
int bytesReceived = _udpSocket.ReceiveFrom(datagram, 0, datagram.Length, SocketFlags.None, ref dummyEP);
if (bytesReceived < 10)
{
throw new SocksClientException("The connection was reset by the remote peer.");
}
remoteEP = SocksClient.ParseEndpoint(datagram, 3);
int addressSize;
switch (remoteEP.AddressFamily)
{
case AddressFamily.InterNetwork:
addressSize = 4;
break;
case AddressFamily.InterNetworkV6:
addressSize = 16;
break;
case AddressFamily.Unspecified:
addressSize = 1 + (remoteEP as DomainEndPoint).Address.Length;
break;
default:
throw new NotSupportedException("AddressFamily not supported.");
}
int dataOffset = 6 + addressSize;
int dataSize = bytesReceived - dataOffset;
if (dataSize > size)
{
dataSize = size;
}
Buffer.BlockCopy(datagram, dataOffset, buffer, offset, dataSize);
return(dataSize);
}