Linker Error-Network Program

[Pter0dactyl]

I made a network program for a server but my compiler is reporting linker errors for every winsock function.can someone help me,here is my program

#include<iostream>
#include"winsock.h"
#include<cstdio>
#include<cstdlib>

using namespace std;

#define NETWORK_ERROR -1
#define NETWORK_OK 0

int WINAPI WinMain(HINSTANCE hinstance,HINSTANCE hprevinstance,LPSTR lp,int n)
{
    WSADATA ws;
    int nret;
    
    WSAStartup(0x0101,&ws);
    
    SOCKET lsocket;
    
    cout<<"\nCreating Socket .......";
    lsocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    if(lsocket==INVALID_SOCKET)
    {
        cout<<"\nCould Not Creat Listening Socket.";
        WSACleanup();
        getchar();
        return NETWORK_ERROR;        
    }
    else
        cout<<"\nSocket Created......";
    
    //Use a SOCKADDR_IN struct to fill addr info
    SOCKADDR_IN serverinfo;
    
    serverinfo.sin_family=AF_INET;
    serverinfo.sin_addr.s_addr=inet_addr("127.0.0.1");
    serverinfo.sin_port=htons(2609);
    
    //Bind the socket to our local server addr
    cout<<"\nBinding Socket .........";
    nret=bind(lsocket,(SOCKADDR *)&serverinfo,sizeof(struct sockaddr));
    if(nret==SOCKET_ERROR)
    {
        cout<<"\nCould Not Bind Listening Socket";
        WSACleanup();
        getchar();
        return NETWORK_ERROR;
    }
    else
        cout<<"\nSocket Bound ..........";
    
    //Make the bound socket listen.Up to 10 ma wait at any one time
    cout<<"\nPutting Bound Socket to Listening Mode";
    nret=listen(lsocket,10);
    if(nret==SOCKET_ERROR)
    {
        cout<<"\nCould Not Attain Listen Mode";
        WSACleanup();
        getchar();
        return NETWORK_ERROR;
    }
    //Wait for client
    cout<<"\nWaiting for Client .......";
    
    SOCKET commsocket;
    commsocket=accept(lsocket,NULL,NULL);
    if(commsocket==INVALID_SOCKET)
    {
        cout<<"\nCould Not Setup Connection On Request";
        WSACleanup();
        getchar();
        return NETWORK_ERROR;
    }
    
    char sendbuffer[256]="\nServer : This is server,reporting on port 2609";
    char recvbuffer[256];
    
    nret=recv(commsocket,recvbuffer,255,0);
    recvbuffer[nret]=0;
    if(nret==SOCKET_ERROR)
    {
        cout<<"\nCould Not Hear Client";
        WSACleanup();
        getchar();
        return NETWORK_ERROR;
    }
    else
    {
        cout<<"\nClient : "<<recvbuffer;
        nret=send(commsocket,sendbuffer,255,0);
        if(nret==SOCKET_ERROR)
        {
            cout<<"\nCould Not Send Message to Client";
            WSACleanup();
            getchar();
            return NETWORK_ERROR;
        }
    }
    closesocket(commsocket);
    closesocket(lsocket);
    
    WSACleanup();
    return NETWORK_OK;
}

[TheIdeasMan]

Is there a winsock library file that needs to be linked during the compile / link process?

[Pter0dactyl]

I dont think so.....

[TheIdeasMan]

I don't know anything about windows programming, but linker errors are not normally due to your code.

The compiler compiles individual source files into object files, the library files are already object files, then the linker joins them all together into an executable. If at this stage the linker cannot find a function, it produces a linker error.

So in short all this means there is a problem in the way you or your IDE are compiling / linking your project.

I would read up on the documentation, to see that you have everything you need.

Hope all goes well.

[tolga gerekci]

You must link ws2_32.lib library file(winsock2) . because all of winsock functions are inside of that file. And of course #include <winsock2.h>

[Pter0dactyl]

I got what the problem was.my compiler do not have ws2_32.lib.can someone tell me what should i do now

[TheIdeasMan]

Have you heard of a thing called "Google" :+D

[Pter0dactyl]

can you please provide me the link for the file :+D

[TheIdeasMan]

http://pcsupport.about.com/od/findbyerrormessage/a/ws2_32-dll-not-found-missing-error.htm

Try the link.

I found this with a simple search on Google. Why is it that people seem to have forgotten how to use Google?

[Pter0dactyl]

thanx @TheIdeasMan

[Pter0dactyl]

I downloaded the file ws2_32.dll and copied it,but still it does'nt do.so i downloaded ws2_32.lib.where should i copy this file...
the following are the errors

[Linker Error] undefined reference to `WSAStartup@8'
[Linker Error] undefined reference to `socket@12'
[Linker Error] undefined reference to `WSACleanup@0'
[Linker Error] undefined reference to `inet_addr@4'
[Linker Error] undefined reference to `htons@4'
[Linker Error] undefined reference to `bind@12'

and so on..............

[TheIdeasMan]

Shouldn't you be installing, rather than copying the file?

[Pter0dactyl]

I just downloaded the file from a source.If i neede to install it please provide me the link ,I'm a bit busy,please.

[Pter0dactyl]

OK! now My program is working perfectly but only when I run both server and client program on same computer.As soon as i run one of them on computer and another on laptop connected via LAN,It did'nt worked. what might be the problem.

[Pter0dactyl]

OK problem solved