Re: Using same port number to connect more than one application to

From:
"Scot T Brennecke" <ScotB@MVPs.spamhater.org>
Newsgroups:
microsoft.public.vc.mfc
Date:
Mon, 27 Apr 2009 06:05:29 -0500
Message-ID:
<eOPmUgyxJHA.1372@TK2MSFTNGP05.phx.gbl>
I think you haven't shared nearly enough of a description of your problem for us to help. It's
clear that you are trying to write your own version of an instant messaging chat service (something
that has been done numerous times). But you haven't clearly explained what problems you are facing.

If an assertion is failing, you've got a big problem. Assertions don't fail in Release mode because
the ASSERT macro doesn't compile to real code unless _DEBUG is #defined. You still have a problem,
and the assertion is pretty clear about what is wrong. You haven't said why you don't understand
it, nor what you are doing to cause it to fail.

"nexolite" <nexolite@discussions.microsoft.com> wrote in message
news:2C3B370D-88D6-4AEF-92FE-E91CB1E2FAFE@microsoft.com...

Please If anyone can reply fast , on whatever you think.

"nexolite" wrote:

Actually I want to build a application to handle connections from the chat
clients(which I have made).
Now since they are only clients so they need server to connect Now what I
want to accomplish is that:
1> Client X connects to the server(the program I am trying to build).

2> Client Y connects to the server.

3> Now there is a mapping with the server for X-Y so it will "connect" both
these.
means it will send the messages received from X to Y and from Y to X.
note that many such pairs will run simultaneously .

4> So now what is the best way to do this?

"Joseph M. Newcomer" wrote:

This code is neither interesting nor informative. You need to show YOUR code! You are
clearly triggering a valid error situation, but unless we see what you did, we have no way
to suggest how to fix it!

I have no idea what the nonsensical statement "everything works fine under Release build"
means, but what it almost certainly translates as is "my program is still broken in the
Release version, but it doesn't bother to tell me that it is malfunctioning because the
ASSERT statements are not compiled in Release versions". You have made the classic error,
thinking that absence of an error message means absence of an error. There's a *reason*
that the debug build fails: your program is wrong. The difference between debug and
release builds is that the release build doesn't bother to tell you that you screwed up.
NEVER play the "it works in Release mode" card until you have proven that it is not broken
in debug mode, and the ASSERT statement clearly tells you that your code is broken. The
"it works in release mode" rationale pretty much indicates that you haven't a clue that
your program really, truly, is broken. We sometimes call it the "ostrich approach" to bug
fixes (if I can't see the bug, it isn't there).

But since you simply duplicated a piece of code we all can see, without showing any of
your code (which is clearly wrong), we can't tell you how to fix it.
joe

On Sat, 25 Apr 2009 06:21:01 -0700, nexolite <nexolite@discussions.microsoft.com> wrote:

I have a CAsyncSocket which listens on some port .if a single connection is
made to it everything is fine ,now if one more Client attempts to connects
then the following Assertion fails

in sockcore.cpp

BOOL CAsyncSocket::Accept(CAsyncSocket& rConnectedSocket,
SOCKADDR* lpSockAddr, int* lpSockAddrLen)
{
ASSERT(rConnectedSocket.m_hSocket == INVALID_SOCKET);
      ....
}

Although everything works fine under Release build but I want to know is
that a concern?

Joseph M. Newcomer [MVP]
email: newcomer@flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm

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