Thread: Winsock Problem

When I compile this program

Code:

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

#define NETWORK_ERROR -1
#define NETWORK_OK     0

void ReportError(int, const char *);


int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmd, int nShow) {
	WORD sockVersion;
	WSADATA wsaData;
	int nret;

	sockVersion = MAKEWORD(1, 1);			// We'd like Winsock version 1.1


	// We begin by initializing Winsock
	WSAStartup(sockVersion, &wsaData);


	// Next, create the listening socket
	SOCKET listeningSocket;

	listeningSocket = socket(AF_INET,		// Go over TCP/IP
			         SOCK_STREAM,   	// This is a stream-oriented socket
				 IPPROTO_TCP);		// Use TCP rather than UDP

	if (listeningSocket == INVALID_SOCKET) {
		nret = WSAGetLastError();		// Get a more detailed error
		ReportError(nret, "socket()");		// Report the error with our custom function

		WSACleanup();				// Shutdown Winsock
		return NETWORK_ERROR;			// Return an error value
	}


	// Use a SOCKADDR_IN struct to fill in address information
	SOCKADDR_IN serverInfo;

	serverInfo.sin_family = AF_INET;
	serverInfo.sin_addr.s_addr = INADDR_ANY;	// Since this socket is listening for connections,
							// any local address will do
	serverInfo.sin_port = htons(8888);		// Convert integer 8888 to network-byte order
							// and insert into the port field


	// Bind the socket to our local server address
	nret = bind(listeningSocket, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr));

	if (nret == SOCKET_ERROR) {
		nret = WSAGetLastError();
		ReportError(nret, "bind()");

		WSACleanup();
		return NETWORK_ERROR;
	}


	// Make the socket listen
	nret = listen(listeningSocket, 10);		// Up to 10 connections may wait at any
							// one time to be accept()'ed

	if (nret == SOCKET_ERROR) {
		nret = WSAGetLastError();
		ReportError(nret, "listen()");

		WSACleanup();
		return NETWORK_ERROR;
	}


	// Wait for a client
	SOCKET theClient;

	theClient = accept(listeningSocket,
			   NULL,			// Address of a sockaddr structure (see explanation below)
			   NULL);			// Address of a variable containing size of sockaddr struct

	if (theClient == INVALID_SOCKET) {
		nret = WSAGetLastError();
		ReportError(nret, "accept()");

		WSACleanup();
		return NETWORK_ERROR;
	}


	// Send and receive from the client, and finally,
	closesocket(theClient);
	closesocket(listeningSocket);


	// Shutdown Winsock
	WSACleanup();
	return NETWORK_OK;
}


void ReportError(int errorCode, const char *whichFunc) {
   char errorMsg[92];					// Declare a buffer to hold
							// the generated error message
   
   ZeroMemory(errorMsg, 92);				// Automatically NULL-terminate the string

   // The following line copies the phrase, whichFunc string, and integer errorCode into the buffer
   sprintf(errorMsg, "Call to %s returned error %d!", (char *)whichFunc, errorCode);

   MessageBox(NULL, errorMsg, "socketIndication", MB_OK);
}

I get these errors:
[Linker error] undefined reference to `WSACleanup@0' (5 of them)
[Linker error] undefined reference to `socket@12'
[Linker error] undefined reference to `WSAStartup@8'
[Linker error] undefined reference to `WSAGetLastError@0' (5 of them)
[Linker error] undefined reference to `htons@4'
[Linker error] undefined reference to `bind@12'
[Linker error] undefined reference to `listen@8'
[Linker error] undefined reference to `accept@12' (2 of them)
[Linker error] undefined reference to `closesocket@4' (2 of them)

They says that I shall link ws2_32.lib but were is it? and how I do it with dev-c++?

Grateful for answers

Roughly speaking
Project settings -> Linker -> additional libraries

If the library is not in one of the standard places, then you may need additional library directories as well.

It's what you said isn't it?

>> and how I do it with dev-c++?

I believe it's libwsock32.a for that compiler (in the \lib directory - of course).