展开全部代理服务器上网分HTTP连接，Socket4 和 Socket5。从几个语句看不出问题，我给个样板吧。是Socket5连接的，using System;using System.Net;using System.Net.Sockets;using System.Text;/** zahmed* Date 23 Jan 2004* Socks 5 RFC is available at http://www.faqs.org/rfcs/rfc1928.html.*/namespace ConProxy{public class ConnectionException:ApplicationException{public ConnectionException(string message) :base(message){}}/// <summary>/// Provides sock5 functionality to clients (Connect only)./// </summary>public class SocksProxy{private SocksProxy(){} #region ErrorMessagesprivate static string[] errorMsgs= {"Operation completed successfully.","General SOCKS server failure.","Connection not allowed by ruleset.","Network unreachable.","Host unreachable.","Connection refused.","TTL expired.","Command not supported.","Address type not supported.","Unknown error." };#endregionpublic static Socket ConnectToSocks5Proxy(string proxyAdress, ushort proxyPort, string destAddress, ushort destPort, string userName, string password){ IPAddress destIP = null; IPAddress proxyIP = null; byte[] request = new byte[257]; byte[] response = new byte[257]; ushort nIndex; try {proxyIP =IPAddress.Parse(proxyAdress); } catch(FormatException) { // get the IP addressproxyIP = Dns.GetHostByAddress(proxyAdress).AddressList[0]; } // Parse destAddress (assume it in string dotted format "212.116.65.112" ) try {destIP = IPAddress.Parse(destAddress); } catch(FormatException) {// wrong assumption its in domain name format "www.microsoft.com" } IPEndPoint proxyEndPoint = new IPEndPoint(proxyIP,proxyPort); // open a TCP connection to SOCKS server... Socket s = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); s.Connect(proxyEndPoint); nIndex = 0; request[nIndex++]=0x05; // Version 5. request[nIndex++]=0x02; // 2 Authentication methods are in packet... request[nIndex++]=0x00; // NO AUTHENTICATION REQUIRED request[nIndex++]=0x02; // USERNAME/PASSWORD // Send the authentication negotiation request... s.Send(request,nIndex,SocketFlags.None); // Receive 2 byte response... int nGot = s.Receive(response,2,SocketFlags.None); if (nGot!=2)throw new ConnectionException("Bad response received from proxy server."); if (response[1]==0xFF) { // No authentication method was accepted close the socket.s.Close();throw new ConnectionException("None of the authentication method was accepted by proxy server."); } byte[] rawBytes; if (/*response[1]==0x02*/true) {//Username/Password Authentication protocolnIndex = 0;request[nIndex++]=0x05; // Version 5. // add user namerequest[nIndex++]=(byte)userName.Length;rawBytes = Encoding.Default.GetBytes(userName);rawBytes.CopyTo(request,nIndex);nIndex+=(ushort)rawBytes.Length;// add passwordrequest[nIndex++]=(byte)password.Length;rawBytes = Encoding.Default.GetBytes(password);rawBytes.CopyTo(request,nIndex);nIndex+=(ushort)rawBytes.Length;// Send the Username/Password requests.Send(request,nIndex,SocketFlags.None);// Receive 2 byte response...nGot = s.Receive(response,2,SocketFlags.None); if (nGot!=2) throw new ConnectionException("Bad response received from proxy server.");if (response[1] != 0x00) throw new ConnectionException("Bad Usernaem/Password."); } // This version only supports connect command. // UDP and Bind are not supported. // Send connect request now... nIndex = 0; request[nIndex++]=0x05; // version 5. request[nIndex++]=0x01; // command = connect. request[nIndex++]=0x00; // Reserve = must be 0x00 if (destIP != null) {// Destination adress in an IP.switch(destIP.AddressFamily){ case AddressFamily.InterNetwork:// Address is IPV4 formatrequest[nIndex++]=0x01;rawBytes = destIP.GetAddressBytes();rawBytes.CopyTo(request,nIndex);nIndex+=(ushort)rawBytes.Length;break; case AddressFamily.InterNetworkV6:// Address is IPV6 formatrequest[nIndex++]=0x04;rawBytes = destIP.GetAddressBytes();rawBytes.CopyTo(request,nIndex);nIndex+=(ushort)rawBytes.Length;break;} } else {// Dest. address is domain name.request[nIndex++]=0x03; // Address is full-qualified domain name.request[nIndex++]=Convert.ToByte(destAddress.Length); // length of address.rawBytes = Encoding.Default.GetBytes(destAddress);rawBytes.CopyTo(request,nIndex);nIndex+=(ushort)rawBytes.Length; } // using big-edian byte order byte[] portBytes = BitConverter.GetBytes(destPort); for (int i=portBytes.Length-1;i>=0;i--)request[nIndex++]=portBytes[i]; // send connect request. s.Send(request,nIndex,SocketFlags.None); s.Receive(response); // Get variable length response... if (response[1]!=0x00)throw new ConnectionException(errorMsgs[response[1]]); // Success Connected... return s;}}}展开全部我不会过，可以为你支招！你出20分说不上就有人做！