如何获取Remoting的客户端IP？？

Question

我找了一下书，还真没有返回客户端ip的属性，
实在不行，久通过dns类来解析，把这个方法加入到远程对象中

Answer 1

我是联通的SP，我想用C#写接收与发送的Socket Service的程序,人家一般都是用VC++的，但我不会用VC++。请问在性能上有没什么大碍？

Answer 2

first, create your own ServerChannelSink class and ServerChannelSinkProvider classusing System;
using System.Runtime.Remoting.Channels;
using System.Net;
using System.Runtime.Remoting.Messaging;
using System.Collections;
using System.IO;public class CClientIPInjectorSink : BaseChannelObjectWithProperties,IServerChannelSink
{
    private IServerChannelSink _nextSink;
    
    public CClientIPInjectorSink(IServerChannelSink nextSink)
    {
_nextSink = nextSink;
    }
 
    public void AsyncProcessResponse(IServerResponseChannelSinkStack sinkStack,
        object state, 
        IMessage msg, 
        ITransportHeaders headers,
        Stream stream) 
    {
        //get the client's ip address, and put it in the call context. 
        //This value will be extracted later so we can determine the actual
        //address of the client.
        try
        {
            IPAddress IPAddr = (IPAddress)headers[CommonTransportKeys.IPAddress];
   CallContext.SetData("ClientIP", IPAddr);
        }
        catch{}        //forward to stack for further processing
        sinkStack.AsyncProcessResponse(msg, headers,stream);
    }    public Stream GetResponseStream(IServerResponseChannelSinkStack sinkStack,
object state,
IMessage msg,
ITransportHeaders headers)
    {
return null;
    }    public IServerChannelSink NextChannelSink
    {
get
{
             return _nextSink;
}
    }    public ServerProcessing ProcessMessage(IServerChannelSinkStack sinkStack,
IMessage requestMsg,
ITransportHeaders requestHeaders,
Stream requestStream,
out IMessage responseMsg,
out ITransportHeaders responseHeaders,
out Stream responseStream)
    {
        //get the client's ip address, and put it in the call context. 
        //This value will be extracted later so we can determine the actual
        //address of the client.
        try
        {
IPAddress IPAddr = (IPAddress)requestHeader[CommonTransportKeys.IPAddress];
CallContext.SetData("ClientIP", IPAddr);
        }
        catch{} //pushing onto stack and forwarding the call
sinkStack.Push(this,null); ServerProcessing srvProc = 
           _nextSink.ProcessMessage(sinkStack,requestMsg,
requestHeaders, requestStream, 
                            out responseMsg,out responseHeaders, 
                            out responseStream);
if(srvProc == ServerProcessing.Complete)
{
//TODO - implement post processing
}
return srvProc;
    }
}//this class is used as the sink provider that creates the 
//CClientiPInjectorSink. It is used by the channel
//so that we can get the caller's ip address
public class CClientIPInjectorSinkProvider : IServerChannelSinkProvider
{    private IServerChannelSinkProvider _nextProvider;    public CClientIPInjectorSinkProvider(){}    public CClientIPInjectorSinkProvider(IDictionary properties, 
                                        ICollection providerdata){}    public IServerChannelSink CreateSink(IChannelReceiver channel)
    {
//create other sinks in the chain
IServerChannelSink nextSink = _nextProvider.CreateSink(channel);
return new CClientIPInjectorSink(nextSink);
    }
    public void GetChannelData(IChannelDataStore channelData)
    {
//not needed
    }    public IServerChannelSinkProvider Next
    {
get
{
              return _nextProvider;
}
set
{
     _nextProvider = value;
}
    }
}

Answer 3

then use it to declare your channel//this part is done where you declare your channelHashtable props;
props.Add("port", 10000);//create the binary server formatter sink
BinaryServerFormatterSinkProvider BinProvider = new BinaryServerFormatterSinkProvider();
BinProvider.TypeFilterLevel = 
System.Runtime.Serialization.Formatters.TypeFilterLevel.Full;//Create the ip injector sink
CClientIPInjectorSinkProvider IpInjProvider = new CClientIPInjectorSinkProvider();//link the providers
BinProvider.Next = IpInjProvider;System.Runtime.Remoting.Channels.Tcp.TcpChannel _PublicChannel 
= new System.Runtime.Remoting.Channels.Tcp.TcpChannel(props, Nothing,BinProvider);
_PublicChannel.StartListening(null);

Answer 4

sorry, forgot one thing. the way to get the IP back:IPAddress clientIP = (IPAddress)CallContext.GetData("ClientIP");

Answer 5

谢谢cqing，因为我的客户端已经发布了，用的是HTTP通道，如果重写接收器链，升级很麻烦呀，有没有在服务器端直接接受的？？

Answer 6

这个就是Server端的呀，你要是用的是HTTP，那就把TcpChannel改成HttpChannel好了。

Answer 7

谢谢Cqing()!!
TO：ermachao() ，客户端挺难获取动态的IP哦。