Question

我希望在通过我的.NET应用程序连接到IRC时隐藏我的IP。我目前使用的是IrcDotNet库，但它似乎不支持代理。

我对插槽没有多少经验，所以我认为修改IrcDotNet比制作我自己的IRC库更容易。我四处寻找处理代理连接的套接字库，我可以在IrcDotNet中实现代理连接。我发现了一个名为ProxySocket但它只支持BeginConnect而不是IrcDotNet使用的新ASyncConnect方法。

按照优先顺序分解，这就是我要找的东西;

支持通过HTTP / SOCKS代理连接的IRC库
支持通过HTTP / SOCKS代理连接的套接字库 ASyncConnect
有关如何扩展套接字类以支持连接的示例代码通过ASyncConnect

我使用的IrcDotNet版本在https://launchpad.net/ircdotnet找到0.4.1。

更新1：我还是没有运气，我很害怕。 Fredrik92的回答虽然有帮助，但不适用于我正在使用的IrcDotNet版本（见上文）。

Answer 1

IRC.NET库使用System.Net.Sockets命名空间中的标准Socket类。

所以你可以修改IRC.NET源代码中的 IrcDotNet / IrcClient.cs 文件（@ http://ircdotnet.codeplex.com/SourceControl/latest）。

您应该为启用代理的IRC客户端添加构造函数并调用默认构造函数。

然后您需要做的就是修改同一文件中的Connect方法（几乎在底部）。每次调用this.client.BeginConnect(..)时，您都必须添加用于连接代理（而不是远程主机）的代码

现在，您只需创建一个新的Connect-callback方法，该方法将HTTP CONNECT请求发送到代理。从HTTP代理中读取响应，然后其他所有内容都应该有效。

在这种情况下，我会将HTTP请求作为原始ASCII字节写入代理（而不是使用HttpWebRequest类），这样您就可以完全控制您获得的网络流...

你应该添加某事。像这样的IrcClient类：

private bool useProxy = false;
private IWebProxy proxy;
private IEnumerable<Uri> proxyRemoteUris;

public IrcClient(IWebProxy proxy)
    : this()
{
   this.useProxy = true;
   this.proxy = proxy;
}

private void ProxyPerformHttpConnect(Uri remoteIrcUri)
{
  string httpConnectRequest = string.Format("CONNECT {0}:{1} HTTP/1.1\r\nHost: {2}\r\n\r\n",
    remoteIrcUri.Host, remoteIrcUri.Port, this.proxy.GetProxy(remoteIrcUri));
  byte[] httpConnectData = Encoding.ASCII.GetBytes(httpConnectRequest);

  this.stream.Write(httpConnectData, 0, httpConnectData.Length);

  bool responseReady = false;
  string responseText = string.Empty;
  // Byte-by-byte reading required, because StringReader will read more than just the HTTP response header
  do
  {
    int readByte = this.stream.ReadByte();
    if (readByte < 0)
      throw new WebException(message: null, status: WebExceptionStatus.ConnectionClosed);

    char readChar = (char)(readByte); // Only works because HTTP Headers are ASCII encoded.
    responseText += readChar;

    responseReady = responseText.EndsWith("\r\n\r\n");
  } while (!responseReady);

  int statusStart = responseText.IndexOf(' ') + 1;
  int reasonStart = responseText.IndexOf(' ', statusStart) + 1;
  int reasonEnd = responseText.IndexOfAny(new char[] { '\r', '\n'});
  HttpStatusCode responseStatus = (HttpStatusCode)(int.Parse(responseText.Substring(responseText.IndexOf(' ') + 1, length: 3)));
  if (responseStatus != HttpStatusCode.OK)
  {
    string reasonText = responseText.Substring(reasonStart, reasonEnd - reasonStart);
    if (string.IsNullOrWhiteSpace(reasonText))
      reasonText = null;
    throw new WebException(reasonText, WebExceptionStatus.ConnectFailure);
  }

  // Finished Response Header read...
}

private void ProxyConnectCallback(IAsyncResult ar)
{
  try
  {
    this.client.EndConnect(ar);
    this.stream = this.client.GetStream();

    bool proxyTunnelEstablished = false;
    WebException lastWebException = null;
    foreach (Uri remoteIrcUri in this.proxyRemoteUris)
    {
      if (this.client.Connected == false)
      {
        // Re-establish connection with proxy...
        Uri proxyUri = this.proxy.GetProxy(remoteIrcUri);
        this.client.Connect(proxyUri.Host, proxyUri.Port);
      }

      try
      {
        ProxyPerformHttpConnect(remoteIrcUri);
        proxyTunnelEstablished = true;
        break;
      }
      catch (WebException webExcept)
      {
        lastWebException = webExcept;                        
      }
    }

    if (!proxyTunnelEstablished)
    {
      OnConnectFailed(new IrcErrorEventArgs(lastWebException));
      return;
    }

    this.writer = new StreamWriter(this.stream, Encoding.Default);
    this.reader = new StreamReader(this.stream, Encoding.Default);

    HandleClientConnected((IrcRegistrationInfo)ar.AsyncState);
    this.readThread.Start();
    this.writeThread.Start();

    OnConnected(new EventArgs());
  }
  catch (Exception ex)
  {
    OnConnectFailed(new IrcErrorEventArgs(ex));
  }
}

IrcClient类的所有Connect方法中代理处理的代码因此看起来很苛刻。像这样：

// Code snippet to insert before the call to this.client.BeginConnect(...)
if (this.useProxy)
{
  // Assign host and port variables for EndPoint objects:
  // var host = remoteEP.Address;
  // var port = remoteEP.Port;
  this.proxyRemoteUris = new Uri[] { new Uri(string.Format("irc://{0}:{1}/", host, port)) };
  // Replace the line above with the following line in the method where an array of IP addresses is specified as a parameter
  // this.proxyRemoteUris = from ip in addresses select new Uri(string.Format("irc://{0}:{1}/", ip, port));
  Uri proxyUri = this.proxy.GetProxy(this.proxyRemoteUris.First());
  string proxyHost = proxyUri.Host;
  int proxyPort = proxyUri.Port;
  this.client.BeginConnect(proxyHost, proxyPort, ProxyConnectCallback, registrationInfo);
}
else
  // Original this.client.BeginConnect(...) call here...

通过代理连接到IRC（.NET）

1 个答案: