Re: CSocket 10038 WSAENOTSOCK Error

From:

=?Utf-8?B?Y2xlb2ht?= <cleohm@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 5 Mar 2007 08:17:30 -0800

Message-ID:

<5AB7C26E-E462-4E08-946B-D7D39E4FB879@microsoft.com>

Thanks for your reply. I am not sure if I have get it wrong. Cause what I
have done is as follows:

Server
-------
AfxSocketInit();
CSocket* serverSocket = new CSocket();

if(serverSocket->Create(111))
{
    printf("Server socket created\n");

    if(serverSocket->Listen())
    {
        printf("Server socket start to listen\n");
                }
}

Client
-------
CSocket* sock = new CSocket();

if(sock->Connect"127.0.0.1", 111))
{
    printf("Client socket connected");
    string msg = "test";

    if(sock->Send(msg.c_str(), strlen(msg.c_str())))
        printf("Sent");
}

Is it wrong to do that? Really appreciate your help.

"Scott McPhillips [MVP]" wrote:

cleohm wrote:

Hi,

I am currently implementing a server socket that listen to a particular port
on the local machine as well as another client socket that connect to the
same port on the same machine. Everything goes fine until I attempt to send
data using the client socket. When I call GetLastError(), I got the error
code 10038 - WSAENOTSOCK.

I suspect that the error is due to me trying to listen and connect on the
same port and address. I tried to use SetSockOpt as follow:

serverSocket->SetSockOpt(SO_REUSEADDR, &nOption, 1);

It is still not successful. Does anyone have any idea how I can resolve
this problem?

There are two port numbers associated with a client socket. One of them
is the client's own and the other is the server to call. When calling a
server on the same machine these two port numbers must be different
because the IP:port pair is used to uniquely identify each socket.

Typical practice is to let the system select the client's own port (pass
NULL to CSocket::Create, and pass the server port to CSocket::Connect).

CSocket is part of the MFC library, so if you have follow up questions
try the MFC newsgroup for best results.

--
Scott McPhillips [VC++ MVP]