Winsock confusion

Okely dokely, I'm stumped. ... I followed that tutorial (Johnnie's winsock tut or whatever) and now I've no idea what I'm doing ...

I understand setting up the connection and closing it (this is a listening app) but how do I get data sent to this? I didn't understand what was going on in the sending recieving bit of the tutorial, it didn't explain it enough IMO ...

Code:

#include <windows.h>
#include <winsock.h>
#include <stdio.h>

#define NET_ERR -1
#define NET_OK   0

bool CheckData ( SOCKET listen, SOCKET client ) {
    
    
    return true;
}

int ReportError ( LPSTR function, int id ) {

    FILE* ErrorLog = fopen ( "errors.log", "a" );
    char buff[256];
    sprintf ( "%s: Returned error id - %i", function, id );
    fputs ( buff, ErrorLog );
    fclose ( ErrorLog );
}

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR args, int nCmdShow ) {
    
    WORD SockVer;
    WSADATA WsaData;

    bool alive = true;
   
    SockVer = MAKEWORD ( 1, 1 );
    WSAStartup ( SockVer, &WsaData );
    
    SOCKET Sock;
    Sock = socket ( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    if ( Sock == INVALID_SOCKET ) {
        
        ReportError ( "socket()", WSAGetLastError ( ) )
        WSACleanup ( );
        return NET_ERR;
    }
    
    SOCKADDR_IN ServerInfo;
    ServerInfo.sin_family = AF_INET;
    ServerInfo.sin_addr.S_addr = INADDR_ANY;
    ServerInfo.sin_port = htons ( 8888 );
    
    if ( bind ( Sock, (LPSOCKADDR)&ServerInfo, sizeof ( struct sockaddr ) == SOCKET_ERROR ) {
    
        ReportError ( "bind()", WSAGetLastError ( ) );
        WSACleanup ( );
        return NET_ERR;
    }
    
    if ( listen ( Sock, 10 ) == SOCKET_ERROR ) {
    
        ReportError ( "listen()", WSAGetLastError ( ) );
        WSACleanup ( );
        return NET_ERR;
    }
    
    SOCKET Client;
    Client = accept ( Sock, NULL, NULL );
    
    if ( Client == INVALID_SOCKET ) {
        
        ReportError ( "accept()", WSAGetLastError ( ) );
        WSACleanup ( );
        return NET_ERR;
    }
    
    while ( alive ) {
        
        alive = CheckData ( Sock, Client );
    }
    
}

That's what I have so far. Now basically what I want to do is while the server thingy hasn't been told to disconnect, check for a message sent. So I need to scan the stream for data I guess which I want to do in the CheckData function.

Is there a simple way to check for say an int incoming? I just want to do a switch on the number and if it's X do this if Y do that etc ...

Alternatively a better more in depth tutorial would be much better ...

Here's another reference you can study...
http://www.sockets.com/winsock.htm

gg

I highly recommend Network Programming for Microsoft Windows, Second Edition by Anthony Jones and Jim Ohmund.

Kuphryn

Originally posted by kuphryn
I highly recommend Network Programming for Microsoft Windows, Second Edition by Anthony Jones and Jim Ohmund.

Kuphryn

Ah, me too, excellent read.

trainee