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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 TcpClient.

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!


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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


Comments and Discussions

GeneralMy vote of 5 Pin
arid08 at 14-Jan-13 0:06
grouparid0814-Jan-13 0:06 
Questioninclude files? Pin
bkelly13 at 21-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
ErickJackob at 3-May-09 17:10
memberErickJackob3-May-09 17:10 
General[Message Deleted] Pin
it.ragester at 2-Apr-09 22:42
memberit.ragester2-Apr-09 22:42 
[Message Deleted]
QuestionHow to pass TcpClient^ to a function as an argument? Pin
AlwaysStudent at 10-Nov-07 20:06
memberAlwaysStudent10-Nov-07 20:06 
QuestionUrgent Question Answer? Pin
BNKRAJ at 30-Oct-07 0:31
memberBNKRAJ30-Oct-07 0:31 
Questionwhat? Pin
System.Object at 21-Jul-06 13:21
memberSystem.Object21-Jul-06 13:21 
Answerusing TcpClient's property Pin
evoisard at 3-Jul-08 6:14
memberevoisard3-Jul-08 6:14 
Generalhi! Pin
scootz3345 at 12-Jul-05 19:25
sussscootz334512-Jul-05 19:25 
GeneralRe: hi! Pin
Albert Pascual at 13-Jul-05 5:54
memberAlbert Pascual13-Jul-05 5:54 
GeneralRe: hi! (Need Help ) Pin
patilabhijit at 10-Apr-07 4:57
memberpatilabhijit10-Apr-07 4:57 
GeneralThe code seems to be wrong. Pin
Huanlin Tsai at 7-May-05 1:46
memberHuanlin Tsai7-May-05 1:46 
Generalneed some guide... Pin
chal_adiera at 24-Mar-05 0:10
memberchal_adiera24-Mar-05 0:10 
GeneralRe: need some guide... Pin
mmatchyn at 18-Nov-05 14:54
membermmatchyn18-Nov-05 14:54 
GeneralI need This in c++ directly using winsock, not using MFC Pin
Anonymous at 20-Mar-04 15:20
sussAnonymous20-Mar-04 15:20 
Generalthanks for the description Pin
Adam Jones at 17-Nov-03 12:11
memberAdam Jones17-Nov-03 12:11 
GeneralThanks very much Pin
Anonymous at 23-Mar-04 4:21
sussAnonymous23-Mar-04 4:21 
GeneralRe: thanks for the description - in C++ Pin
AndyKEnZ at 4-Dec-07 3:59
memberAndyKEnZ4-Dec-07 3:59 
Generalthe result includes port # Pin
duhduhduh at 20-Feb-03 21:02
memberduhduhduh20-Feb-03 21:02 
GeneralI need this in Pin
SoTTo at 29-Oct-02 5:39
sussSoTTo29-Oct-02 5:39 
GeneralRe: I need this in Pin
Pete Bassett at 29-Oct-02 8:46
memberPete Bassett29-Oct-02 8:46 
GeneralRe: I need this in Pin
Pete Bassett at 29-Oct-02 8:52
memberPete Bassett29-Oct-02 8:52 
GeneralRe: I need this in Pin
Ken Ng at 18-Jan-03 9:48
sussKen Ng18-Jan-03 9:48 
GeneralRe: I need this in Pin
linge at 23-May-06 22:51
memberlinge23-May-06 22:51 
GeneralRe: I need this in Pin
Polymorpher at 13-Mar-06 19:47
memberPolymorpher13-Mar-06 19:47 

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