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Posted 10 Apr 2002

How to get the clients IP address using TcpClient in Managed C++

, 10 Apr 2002
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How to get the clients IP address using TcpClient in Managed C++
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In managed C++ using sockets, Microsoft is giving you a whole set of new tools to use Sockets. So you don't have to create a class to handle Client and Server communications. These classes are TcpListener for the server and


TcpListener * pTcpListener;
TcpListener = new TcpListener(80);
TcpClient * pTcpClient; 
pTcpClient = m_TcpListener->AcceptTcpClient();

This opens port 80 and listens for connections. When a client connects to port 80, the function AcceptTcpClient() returns with a TcpClient class.

Those two classes together are very powerful. You should create a thread to use the TcpClient and wait again to accept another client.

The problem I had is I need it to get the IP address of the Client. I couldn't find the way to get it from the TcpClient, even after I get the Stream like this:

 NetworkStream * networkStream = pTcpClient->GetStream();
networkStream->Read(bytes, 0, (int) pTcpClient->ReceiveBufferSize);

Now that I had a NetworkStream I thought I could get the IP address, well I was wrong again. networkStream->getSocket() is a private member of the class NetworkStream.

So, to resolve this problem I had to create a derived class from NetworkStream:

#pragma once

__gc class MyNetworkStream : public NetworkStream
	MyNetworkStream(void) : NetworkStream(0) { };
	MyNetworkStream(System::Net::Sockets::Socket * s) : NetworkStream(s) { };
	System::Net::Sockets::Socket * get_MySocket();
	String * get_IPAddress(void);

//MyNetworkStream.cpp file
#using <System.dll>
#using <mscorlib.dll>
using System::Net::Sockets::NetworkStream;
using System::String;

#include "myNetworkStream.h"

System::Net::Sockets::Socket * MyNetworkStream::get_MySocket()

String * MyNetworkStream::get_IPAddress(void)
	System::Net::Sockets::Socket *soc = get_Socket();
	System::Net::EndPoint		*Endp = soc->get_RemoteEndPoint();


So when you have this class, you only have to do something like that to get the client's IP address and socket:

NetworkStream * networkStream = pTcpClient->GetStream(); 
MyNetworkStream * myStream =  static_cast<MyNetworkStream *>(networkStream);
ClientIP = myStream->get_IPAddress();
Console::Write(S"Client IP Address ");
networkStream->Read(bytes, 0, (int) pTcpClient->ReceiveBufferSize);

There you go! IP address and everything. Now if you don't use TcpClient, you could AcceptSocket() instead of AcceptTcpClient() to get the socket. When you have the socket you can use get_RemoteEndPoint(), but I thought that you will like to use TcpClient.

Have fun!


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Albert Pascual
Web Developer
United States United States
Al is just another Software Engineer working in C++, ASp.NET and C#. Enjoys snowboarding in Big Bear, and wait patiently for his daughters to be old enough to write code and snowboard.

Al is a Microsoft ASP.NET MVP


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Comments and Discussions

GeneralMy vote of 5 Pin
arid0814-Jan-13 0:06
grouparid0814-Jan-13 0:06 
Questioninclude files? Pin
bkelly1321-Oct-10 18:16
memberbkelly1321-Oct-10 18:16 
GeneralIs there a way to sent stream out through a specific IP in a multi-IP server Pin
ErickJackob3-May-09 17:10
memberErickJackob3-May-09 17:10 
General[Message Deleted] Pin
it.ragester2-Apr-09 22:42
memberit.ragester2-Apr-09 22:42 
QuestionHow to pass TcpClient^ to a function as an argument? Pin
AlwaysStudent10-Nov-07 20:06
memberAlwaysStudent10-Nov-07 20:06 
QuestionUrgent Question Answer? Pin
princedatta30-Oct-07 0:31
memberprincedatta30-Oct-07 0:31 
Questionwhat? Pin
System.Object21-Jul-06 13:21
memberSystem.Object21-Jul-06 13:21 
Answerusing TcpClient's property Pin
evoisard3-Jul-08 6:14
memberevoisard3-Jul-08 6:14 
Generalhi! Pin
scootz334512-Jul-05 19:25
sussscootz334512-Jul-05 19:25 
GeneralRe: hi! Pin
Albert Pascual13-Jul-05 5:54
sitebuilderAlbert Pascual13-Jul-05 5:54 
GeneralRe: hi! (Need Help ) Pin
patilabhijit10-Apr-07 4:57
memberpatilabhijit10-Apr-07 4:57 
GeneralThe code seems to be wrong. Pin
Huanlin Tsai7-May-05 1:46
memberHuanlin Tsai7-May-05 1:46 
Generalneed some guide... Pin
chal_adiera24-Mar-05 0:10
memberchal_adiera24-Mar-05 0:10 
GeneralRe: need some guide... Pin
mmatchyn18-Nov-05 14:54
membermmatchyn18-Nov-05 14:54 
All references of

need to be changed to:

Then it will work.
GeneralI need This in c++ directly using winsock, not using MFC Pin
Anonymous20-Mar-04 15:20
memberAnonymous20-Mar-04 15:20 
Generalthanks for the description Pin
Adam Jones17-Nov-03 12:11
memberAdam Jones17-Nov-03 12:11 
GeneralThanks very much Pin
Anonymous23-Mar-04 4:21
memberAnonymous23-Mar-04 4:21 
GeneralRe: thanks for the description - in C++ Pin
AndyKEnZ4-Dec-07 3:59
memberAndyKEnZ4-Dec-07 3:59 
Generalthe result includes port # Pin
duhduhduh20-Feb-03 21:02
memberduhduhduh20-Feb-03 21:02 
GeneralI need this in Pin
SoTTo29-Oct-02 5:39
memberSoTTo29-Oct-02 5:39 
GeneralRe: I need this in Pin
Pete Bassett29-Oct-02 8:46
memberPete Bassett29-Oct-02 8:46 
GeneralRe: I need this in Pin
Pete Bassett29-Oct-02 8:52
memberPete Bassett29-Oct-02 8:52 
GeneralRe: I need this in Pin
Member 56031918-Jan-03 9:48
memberMember 56031918-Jan-03 9:48 
GeneralRe: I need this in Pin
linge23-May-06 22:51
memberlinge23-May-06 22:51 
GeneralRe: I need this in Pin
Polymorpher13-Mar-06 19:47
memberPolymorpher13-Mar-06 19:47 

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